Signal Transformers Specifications

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General Specifications


	Winding Turns
	Your choices are...
	Step-Up Transformer		In step-up transformers, the secondary voltage is larger than the primary voltage.
	Step-Down Transformer		In step-down transformers, the secondary voltage is smaller than the primary voltage.
	Variable		The transformer has a setting to change the turn ratio as needed.
	One to One		The transformer ratio is 1:1, or near 1:1.
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	Transformer Types / Applications
	Your choices are...
	High-Voltage Transformer		High-voltage transformers are used in situations where a high voltage is needed.
	High Frequency Transformer		Transformers used in high-frequency applications.
	Interface Transformer		Interface transformers are used in communications applications where the signal is isolated.
	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. Noise represents a typical isolated signal. In isolation transformers, there is typically no change in the voltage from primary to secondary. Isolation transformers are also used to ground electronic circuits.
	Inverter Transformer		Inverter transformers are used in inverter circuits, such as power conversion inverters.
	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.
	Lighting Transformer		Lighting transformers are used to provide suitable power to lights and lighting systems.
	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.
	Planar Transformer		The winding of a planar transformer are patterns on a printed circuit board (PCB).
	RF Transformer		RF transformers are low-power devices normally used for impedance matching that operate over the radio frequency or microwave spectrum.
	Single Phase Transformer		These are transformers that operate with single phase voltage.
	Switch Mode Transformer		Switch mode transformers or switching transformers are used in switching power supplies and DC-DC converters. These transformers provide the energy storage element to transfer energy from input-to-output in discrete packets that are required in switching power supplies, regulators, or converters.
	Telecom / LAN Transformer		Telecom transformers are used in applications that require high bandwidth and fast switching speeds. The signal is isolated between the primary and secondary grounds.
	Three Phase / Polyphase Transformer		In polyphase (3-phase) transformers, the three primary windings are connected together and the three secondary windings are connected as well.
	Trigger / Gate Drive Transformer		Trigger transformers are used to drive high-speed switching devices, such as FETs and IGBTs. They are commonly used in applications like switching power supplies.
	Other		Other unlisted, specialized, or proprietary transformer type.
	Audio Transformer		Audio transformers are ideally suited for voice and data transmission. The frequency response of these transformers typically ranges from 300 Hz to 20 kHz.
	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.
	Buck-Boost Transformer		Buck-boost transformers are used to make small changes to a voltage. Typical usage is for distribution, power, or power supply transformers.
	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
	Balun Transformer		Balun transformers are used to interface a balanced line (two conductors carrying equal currents in opposite directions) to an unbalanced line (one conductor carrying current and a ground). Its name is derived from the terms applied to BALanced to UNbalanced lines.
	Constant Current Transformer		Constant current transformers or current regulators are designed to deliver constant current under varying loading conditions. They are most often used to provide the power to series-connected street lights.
	Encapsulated Transformers		Encapsulated transformers have a protective coating of cured plastic or other encapsulant which encloses the unit and provides weatherproofing.
	Constant Voltage Transformer (CVT)		Constant voltage transformers keep the secondary voltage constant even if the primary (source) voltage changes.
	Current Sense Transformer		Current sense transformers are generally used to detect and measure current. There are two basic types of current sense transformers: those designed and used to precisely measure current in accurate instrumentation applications, and others designed and used in switch-mode power converter type applications. In power conversion applications, current transformers are used to measure trends, peak values, and average values rather than absolute values. As a result, these devices do not need to have a very high degree of accuracy, but rather need to be efficient, dense, and exist in many shapes and styles capable of supporting all traditional types of manufacturing processes.
	Digital Transformer		Digital transformers are used in audio applications to isolate the signal and match impedances.
	Electronics Transformer		Current or voltage transformers used as measuring instruments in the electronics industry.
	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 flyback - 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 CRTs.
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	Center Tap Options:
	Your choices are...
	None		The transformer does not have a center tap.
	Primary Side Only		The transformer has a center tap in the primary side only.
	Secondary Side Only		The transformer has a center tap in the secondary side only.
	Both Sides		The transformer has a center tap in both the primary and the secondary sides.
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Package / Packaging


	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 ensure 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 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.
	Other		Other unlisted, specialized, or proprietary transformer mounting techniques.
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	Package Type:
	Your choices are...
	Connectorized		Connectorized devices attach with coaxial or other types of connectors.
	Flat Pack (FPAK)		Flat pack (FPAK) devices have gull wing or flat leads on two-or-four sides. They provide exceptional thermal and electrical performance and are available in cavity-up and cavity-down configurations. Flat pack devices are typically ceramic, hermetic, and surface-mounted. They are available in a variety of body sizes and pin counts.
	Surface Mount Technology (SMT)		Surface mount technology (SMT) adds components to a printed circuit board (PCB) by soldering component leads or terminals to the top surface of the board. SMT components have a flat surface that is soldered to a flat pad on the face of the PCB. The PCB pad is typically coated with a paste-like formulation of solder and flux. With careful placement, SMT components on solder paste remain in position until elevated temperatures, usually from an infrared oven, melt the paste and solder the component leads to the PCB pads. Industry-standard pick-and-place equipment can mount SMT components quickly, accurately, and cost-effectively. SMT is a widely used alternative to mounting processes that insert pins or terminals through holes and solder leads into place on the opposite side of the board.
	Through Hole Technology (THT)		Through hole technology (THT) mounts components on a printed circuit board (PCB) by inserting component leads through holes in the board, and then soldering the leads in place on the opposite side of the board.
	Waveguide Assembly		Waveguide assemblies are used in microwave waveguide systems. They consist of a hollow, metallic conductor with a rectangular, elliptical, or circular cross-section. Some conductors contain solid or gaseous dielectric materials.
	Other		Other unlisted, specialized, or proprietary package.
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Performance Specifications


	Operating Frequency Range		The frequency range for which the transformer will meet all guaranteed specifications.
	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.

	3 dB Bandwidth:		The frequency range for over which the insertion loss is less than 3 dB referenced to the midband insertion loss.
	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.

	Impedance Ratio:		The impedance ratio of a transformer is determined by the square of the turn ratio.
	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		Power rating refers to the output power range the transformer is capable of producing.
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	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.

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.
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Signal Transformers Specifications

Winding Turns:

Transformer Types / Applications:

Center Tap Options:

Mounting / Form Factor:

Package Type:

Operating Frequency Range:

3 dB Bandwidth:

Impedance Ratio:

Power Rating:

Operating Temperature:

Standards / Compliance:

Help with Signal Transformers specifications: