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Transformer Type / Application:

Cooling Method:

Mounting / Form Factor:

Construction:

Primary Frequency:

Single Phase Primary Configuration:

Three Phase Configuration:

Maximum Primary Voltage Rating:

Maximum Secondary Voltage Rating:

Maximum Secondary Current Rating:

Power Rating (VA):

Operating Temperature:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Output Voltage:

Standards / Compliance:

Features:

Help with Power Transformers specifications:

General Specifications
   Transformer Type / Application       
   Your choices are...         
   Autotransformer       Autotransformers are a special type of power transformer that only has one winding. By tapping or connecting at certain points along the winding, different voltages can be obtained. Autotransformers are generally used in low-power applications. 
   Bar Transformer       Bar current transformers are toroidal transformers with a bus bar permanently inserted through the window of the toroid. The bus bar serves as the primary conductor. Bar transformers are inserted directly into the circuit that they will be used to monitor. It is a common error to refer to wound primary transformers as bar transformers because the primary connections are made to busbars. In the wound type, busbars are a means of connection and not continuous bars 
   Buck-Boost Transformer       Buck-boost transformers are used to make little changes to a voltage. Typical usage is for distribution, power, or power supply transformers. 
   Encapsulated Coil       Encapsulated coil transformers have windings that are solidly-cast in resin under a vacuum in a mold. This manufacturing process covers the transformer windings in a strong epoxy resin with a high dielectric strength, effectively sealing out moisture and contaminants from the core and coil. Encapsulated coil transformers are dry-type, high-power transformers. They are sometimes called cast coil transformers. 
   Distribution Transformer       Distribution transformers are pole-type transformers that supply relatively small amounts of power to residences. They are used at the end of an electrical utility’s delivery system. Distribution transformers are used in electrical power distribution and transmission systems. These types of transformers have high power, or volt-ampere ratings, and the continuous voltage rating.  The power rating is normally determined by the type of cooling methods the transformer may use.  Some commonly-used methods of cooling include using oil or some other heat-conducting material. Ampere rating is increased in a distribution transformer by increasing the size of the primary and secondary windings; voltage ratings are increased by increasing the voltage rating of the insulation used in making the transformer. 
   Electronics Transformer       Current or voltage transformers used as measuring instruments in the electronics industry. 
   Encapsulated Transformers       Encapsulated transformers have a protective coating of cured plastic or other encapsulant which encloses the unit and provides weatherproofing. 
   Flyback Transformer (FBT)       Flyback transformers (FBT) or line output transformers (LOPT) are transformers that are designed to produce a very high output voltage (normally in the order of kilovolts) from a relatively low input voltage. Flyback is a topology that uses the flayback - also known as kickback - of an inductor to convert the input voltage to the transformer to a desired output voltage.  This is done by first storing the input energy (in the inductor) produced by the input voltage (this is called the charging cycle), and then transferring this energy (this is called the discharge cycle) to the output. They are commonly used to generate high voltage to drive CRT's 
   GSU Transformer       Generator step-up (GSU) power transformers are used to increase the voltage from a power generator to the desired higher voltage. They are normally located in a power station. 
   High-Voltage Transformer       High-voltage transformers are used in situations where a high voltage is needed. 
   Impedance Matching Transformer       Impedance matching transformers are used to interface two different devices or circuits in order to provide common impedance. In general, these types of transformers have a 1:1 turn ration. 
   Industrial Control Transformer       Control transformers are used in electronic circuits or systems that require constant voltage or constant current. 
   Inverter Transformer       Inverter transformers are used in inverter circuits, such as power conversion inverters. 
   Isolation Transformer       Isolation transformers are low-power transformers used to isolate the primary and secondary windings completely without affecting the quality of the signal passing through. A typical signal that normally is isolated is the noise. In isolation transformers, normally there is no change in the voltage from primary to secondary. Isolation transformers are also used to ground electronic circuits.   
   Leakage Transformer       Leakage (or stray-field) transformers have a higher leakage inductance than normal transformers. This makes the primary and secondary currents very small, so no thermal overload occurs. These transformers are used for arc welding, discharge lamps, and other applications. 
   Medical Transformer       A transformer used in medical applications such as biomedical equipment in hospitals. There are many strict safety rules, guidelines and laws governing the design, construction and use  of these transformers. 
   Multi-Ratio Transformer       These transformers have several outputs.  Each output corresponds to a different transformer ratio. 
   Neutral Grounding Transformer       Transformers used to provide earth reference points to underground electrical systems. The best way to ground a power system is to obtain the system neutral through a generator or transformer with a wye-connected winding. 
   Power Transformer       Power transformers convert one voltage to another at high power level. Power  transformers  are  used  in  electronic circuits  and come  in  many  different  types  and applications. Power transformers are sometimes considered to be those with ratings of 300 volt-amperes and below.  These transformers normally provide power to the power supply of an electronic device, such as in power amplifiers in audio receivers. 
   Rectifier Transformer       Rectifier transformers produce a DC current or voltage. They are drive a diode or a thyristor, and they are used in electrolysis and smelting applications. 
   Resonant Transformer       Resonant transformers operate at the resonant frequency of one of its coils (the primary or the secondary). They are used for arc welding, discharge lamps, etc. 
   Single Phase Transformer       These are transformers that operate with single phase voltage. 
   Solar Power Transformer       The transformer is used in solar power applications. 
   Substation Transformer       Substation transformers are used in substation terminals where the incoming voltage is stepped-up or stepped-down using these transformers. 
   Three Phase / Polyphase Transformer       In polyphase (3-phase) transformers, the three primary windings are connected together and the three secondary winding are also connected together. 
   Variac / Variable Autotransformer       A variac is an autotransformer with sliding tap. They are also known as variable autotransformers. 
   Other       Other unlisted, specialized, or proprietary transformer type. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Cooling Method       
   Your choices are...         
   Dry-type / Air Cooled       Air-cooled or dry-type transformers do not have a core. The two windings are facing each other, surrounded by air. In big transformers, the enclosure or case is ventilated to allow air to flow and cool the windings. Because they are environmentally safe, they can be used indoors of houses or buildings. 
   Oil Filled       In oil-filled power transformers, the winding and core are immersed in oil to keep the transformer cool. Oil is also used as an insulator. 
   Water       The transformer is cooled with water. 
   Other       Other, unlisted, or proprietary cooling method. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Mounting / Form Factor       
   Your choices are...         
   Chassis Mount       A chassis-mounted transformer has tabs to facilitate screwing it down. 
   Chip Transformer       Chip transformers have a form factor of an integrated circuit (IC) chip. They are typically manufactured using thin-film technology. 
   Dish / Disk Mount       A simple rubber washer and metal disk or dish secures the transformer to the chassis or board. There is usually a through-hole in the middle of the disk that allows for a screw to hold the transformer down. 
   H-Frame       H-frame mounting is used in applications where high vibration or shock is present. It is an "H" shaped frame that the transformer sits on. The frame is secured to the chassis or board. 
   Modular Jack       Magnetics incorporated into the RJ-45 form factor insure high common mode noise immunity, while maintaining signal integrity. 
   Pad-Mounted       Pad-mounted transformers are mounted on the ground, sitting on a concrete (or other material) pad. They are normally step-down transformers used in power distribution systems to step down the voltage from the high voltage terminals of an underground distribution system to the low voltage of the end user’s needs. 
   PC / PCB Mount       Any of a variety of signal transformers mounted on PCBs. They can either be of surface-mounted or through-hole configurations, using the soldering method to hold the transformers. PC mount transformers offer a small footprint for the design engineer looking to measure sensor current or voltage on a computer board. Some applications for PC or PCB transformers include sensing current overload, ground fault detection, metering, isolated current feed-back signal in switch mode power supplies, motor current load / overload, lighting, switch controls, ultra-sound current, high resolution sonar current, and isolated bi-directional current sensor with full wave bridge. 
   Pole-Mounted       Pole-mounted transformers are installed on top of poles and are normally used as distribution step-down transformers servicing houses located close by. 
   Other       Other unlisted, specialized, or proprietary transformer mounting techniques. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Construction       
   Your choices are...         
   Laminated Core       Laminated transformers, or E-I transformers, contain laminated-steel cores insulated with a nonconducting material such as varnish. They are formed into a core to reduce electrical losses. 
   Split Core       Split core current transformers are designed to provide a low cost method to monitoring electrical current. A unique hinge and locking snap allows attachment without interrupting the current-carrying wire. 
   Toroidal Core       Toroidal transformers typically consist of copper wire wrapped around a cylindrical core. This design prevents the magnetic flux that occurs within the coil from leaking. 
   Other       Other unlisted or proprietary core types. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Primary Specifications
   Primary Frequency:      Frequency of incoming voltage signal to primaries.
   Your choices are...         
   50 Hz       The primary is rated only for 50 Hz. 
   60 Hz       The primary is rated only for 60 Hz. 
   50 / 60 Hz       The primary is rated for both 50 and 60 Hz. 
   400 Hz       The primary is rated only for 400 Hz (aerospace). 
   Other       Other, unlisted frequency option. 
   Search Logic:      Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Single Phase Primary Configuration:      The size and cost of a transformer increases with the number of leads. A 5-lead primary requires more copper than a quad (2+2) primary. A ladder is the least economical primary configuration.
   Your choices are...         
   Single       Single-phase transformers with single configuration have only one winding in the primary side and can accept only one nominal voltage. 
   Dual       Single-phase transformers with dual configuration have dual windings in the primary side and can accept two nominal voltages. This configuration helps to reduce fault current levels. A 2-lead voltage selector must be provided. 
   Quad (2+2)       Single-phase transformers that use the quad (2+2) configuration have dual windings in the primary side where each winding has a tap for accepting two nominal voltages. 
   5-Lead       Single-phase transformers with 5-lead voltage selectors can accept five possible nominal voltages. The primary winding is arranged so that it can accept the 5 voltage ratings. 
   Ladder       The ladder configuration is a model used with multiple winding transformers. A ladder transformer consists of windings in a cascade and a series of inductances connected between adjacent windings. 
   Other       Other unlisted, specialized, or proprietary configuration. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Three Phase Configuration:      Three phase transformers are connected in delta or wye configurations. A wye (Y) - delta transformer has its primary winding connected in a wye and its secondary winding connected in a delta. A delta - wye (Y) transformer has its primary winding connected in a delta and its secondary winding connected in a wye.
   Your choices are...         
   Delta - Delta       Both the primary winding and the secondary winding use a delta configuration. 
   Delta - Wye (Y)       The primary winding uses a delta configuration and the secondary winding uses a wye configuration. 
   Wye (Y) - Wye (Y)       Both the primary winding and the secondary winding use a wye configuration. 
   Wye (Y) - Delta       The primary winding uses a wye configuration and the secondary winding uses a delta configuration. 
   Wye (Y) - Single Phase       The primary winding uses a wye configuration and the secondary winding uses a single-phase configuration with one winding.  
   Delta - Single-Phase       The primary winding uses a delta configuration and the secondary winding uses a single-phase configuration with one winding. 
   International       International transformers are fully compliant with American and International standard specifications, such as IEC and NEMA. International transformers can be used in the U.S or in any country that supports their voltage and frequency requirements. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Maximum Primary Voltage Rating       The maximum primary voltage rating is the input voltage range of the transformer. Transformers for use with several nominal voltages need more than one primary winding. Enter the maximum voltage required for the application. Matching products will list all primary voltages available in addition to the maximum specified. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Secondary Specifications
   Maximum Secondary Voltage Rating       The maximum secondary voltage rating is the output voltage range of the transformer. A transformer may provide more than one secondary voltage. Enter the maximum voltage required for the application. The matching products will list all secondary voltages available in addition to the maximum specified. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Maximum Secondary Current Rating       This is the rated output current. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Power Rating (VA)       The rated power of the transformer is the sum of the VA (volts x amps) for all of the secondary windings. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Operating Temperature:       Full required range of ambient operating temperature. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
   Output Voltage       
   Your choices are...         
   AC       Alternating current (AC) waveform output voltage values are typically expressed as RMS values. Consult the manufacturer for waveform options. 
   DC       With direct current (DC) secondary voltage output, consult the manufacturer for the type of rectification. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Standards / Features
   Standards / Compliance       
   Your choices are...         
   RoHS Compliant       Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polybrominated diphenyl ether. RoHS became effective on July 1, 2006. 
   ANSI       American National Standards Institute (ANSI) does not itself develop American National Standards, but it facilitates standards development by establishing consensus among qualified groups. 
   CSA       Canadian Standards Association (CSA) establishes standards of safety for products and helps preserve the environment. CSA tests and certifies products for national in international companies. 
   IEC       International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. 
   MIL-STD       The transformer satisfies U.S. military standards or specifications (MIL-SPEC). There are many testing standards associated with MIL standards. 
   UL       Underwriters Laboratories Inc. (UL) is an independent, not-for-profit product safety testing and certification organization. 
   TUV       TÜV Rhineland Berlin-Brandenburg appraises tests and certifies technical equipment and products according to international quality standards, and then registers those in compliance. 
   VDE       The Germany-based VDE Testing & Certification Institute is accredited on a national and international level in the area of testing electrotechnical products. Testing is conducted for safety, electromagnetic compatibility, and other characteristics. 
   WEEE Compliant       Waste Electrical and Electronics Equipment (WEE) is a European Union (EU) Directive that aims to encourage the reuse, recycling, and recovery of electrical and electronic equipment, and to improve the environmental impact and performance of this equipment. WEEE establishes the requirements and criteria for the collection, treatment, recycling, and recovery of this equipment. It makes producers responsible for financing these activities, and retailers and distributors must provide means for consumers to return used or obsolete equipment without charge. 
   Other       Any other agency that that tests or certifies electrical, electronic or electrotechnical products. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Features       
   Your choices are...         
   Waterproof       The transformer has a waterproof case. 
   NEMA Enclosure       The transformer's enclosure satisfies the NEMA standards. 
   Outdoor Use       The transformer can be used outdoors. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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