Help with Reed Relays specifications:
General Specifications
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| Mounting | |||
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| Bracket (Flange) Mount | The relay is equipped with a flange. Typically, this flange is installed by bolting the unit to a matching flange that is welded to a corresponding wall. | ||
| DIN Rail | The relay is equipped with a fastener that can attach to a DIN rail. | ||
| Panel | The relay can be mounted in or on a panel. | ||
| PC Board | The relay can be mounted on a printed circuit board (PCB). | ||
| Socket or Plug-in Style | The relay can be mounted in a socket or on a printed circuit board (PCB). | ||
| Other | Other unlisted mounting styles. | ||
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Additional Specs
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| Pole Specifications | |||
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| Single Pole (SP) | Single pole (SP) relays have a single, moveable lever with a contact at the end. | ||
| Double Pole (DP) | Double pole (DP) relays consist of two, single-pole contacts that are concurrently actuated by the same mechanical system and operation. Typically, the first line is hot and the second is neutral. | ||
| Triple Pole (TP) | Triple pole (TP) relays consist of three single-pole contact systems. | ||
| Four Pole (4P) | Relays with more than three poles are indicated by the number of single-pole contacts followed by the letter "P". For example, four-pole relays are 4P devices. | ||
| > 4 Poles | This category includes relays with more than four circuit contacts. | ||
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| Throw Specifications | |||
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| Single Throw | Single throw (ST) relays have a pair of contacts that are open in one position and closed in the other. | ||
| Double Throw | Double throw (DT) relays have three contacts. In one position, the first is in contact with the second, but not the third. In the other relay position, the connection is reversed. | ||
| 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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Number of Contacts
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| Normally Open (NO) | With normally open (NO) devices, the relay contact pair is open when the coil is not energized. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Normally Closed (NC) | With normally closed (NC) devices, the relay contact pair is closed when the coil is not energized. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Changeover (CO) | Changeover relays typically have one set of Form C contacts and are single-pole, double-throw (SPDT) devices. | ||
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Contact Ratings
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| Maximum Current | This is the maximum continuous current allowable across the relay output terminals under the specified heat dissipation and ambient temperature conditions. Generally, AC current is specified in RMS units. Maximum current is also known as the maximum switching voltage range, or the maximum switching current. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Maximum AC Switching Voltage | This is the maximum AC switching voltage. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Maximum DC Switching Voltage | This is the maximum DC switching voltage. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Maximum AC Switching Power | The maximum AC switching power is measured in volt amperes (VA). | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Maximum DC Switching Power | The maximum DC switching power is measured in watts (W). | ||
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Coil Ratings
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| AC Coil Voltage | This is the AC voltage rating of the relay actuation coil. | ||
| 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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| DC Coil Voltage | This is the DC voltage rating of the relay actuation coil. | ||
| 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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| Coil Resistance | The resistance of the actuation coil is measured in ohms (Ω). | ||
| 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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| Coil Nominal AC Power | Coil nominal AC power is measured in volt amperes (VA). | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Coil Nominal DC Power | Coil nominal DC power is measured in watts (W). | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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Performance
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| Make Time (Operate Time) | Make time (operate time, pick-up time) is the time required from actuation to the full current-carrying state. | ||
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| Break Time (Release Time) | Break time (release time, drop-out time) is the time from deactivation to the open state. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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Features
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| Features | |||
| Your choices are... | |||
| Convertible Contacts | Convertible contacts can be reconfigured from normally open (NC) to normally closed (NC), and vice versa. | ||
| Current Sensitive | Current sensitive relays indicate when a preset AC or DC current threshold is exceeded. | ||
| Latching Relay | Relays are used for latching applications (e.g. latching limit controllers). | ||
| Mercury Wetted Contacts | Mercury is used to wet the contacts and ensure a good connection. | ||
| Sealed Relay | Relays are sealed to prevent the ingress of contaminants, water, etc. | ||
| Visual Indicator | The relay has visual indicator such as a light-emitting diode (LED). | ||
| 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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Temperature
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| Operating Temperature | This is the full-required range of ambient operating temperature. This represents the surrounding air temperature limits. | ||
| 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. | ||
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