This Product Selection Guide contains information to help select products in the Reed Relays category on DigiKey.com
Reed relays use an electromagnetic coil to directly control one or more flexible ferromagnetic metal reed switches, eliminating the need for a mechanical armature. Reed relays require low coil current and are capable of fast operate and release times. Dual coils in some reed relays allow for latching capability. Contact forms include DPDT, DPST, SPDT and SPST.
SelectionCharacteristics
Mounting Type: Indicates how the device is attached.
Coil Voltage: The nominal voltage that must be applied to a relay’s control coil to actuate the device.
Contact Form: Describes the contact closures provided by a relay or relay-output device, in terms of the number of independent circuits that are actuated in parallel, the number of contact positions available for each, and their default states. For more information please see Switch Basics, Examples of Pole and Throw.
Contact Rating (Current): The amount of current that a relay’s contacts are rated to interrupt when switching a resistive load. Ratings may differ for reactive loads and when switching AC or DC current.
Switching Voltage: The voltage that a relay’s output contacts are rated to interrupt.
Coil Current: The nominal current flow through a relay’s control coil when the indicated coil voltage is applied.
Coil Type: Whether the coil is latching or non-latching, single or dual coil.
Features: These are different capabilities or properties of the device such as a diode or EMI shielded.
Termination Style: Selection of termination style used to connect the device to a system, such as axial, PC pin, or wire leads.
Seal Rating: Identifies to what degree the device is sealed.
Must Operate Voltage: The minimum voltage needed to energize the coil.
Must Release Voltage: The maximum applied voltage at which a relay must return to an inactive state.
Operate Time: Characterizes the time delay between application of rated coil voltage and the closure (or opening) of all contacts that occurs as a result. Typically does not include contact bounce time.
Release Time: Characterizes the time delay between removal of power from the device coil and all contacts returning to their rest postions. Does not include bounce time, and may be affected by choice of control circuitry.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Contact Material: The material used for the electrical contacts on the relay.
ProductExamples
| MFR PART # | S2-03P |
|---|---|
| DIGI-KEY PART # | 725-1363-ND |
| MANUFACTURER | Sensata-Cynergy3 |
| DESCRIPTION | Component Mount TO-18 Circular 0.060" (1.52mm) White |
| DATASHEET | Click Here |
| MFR PART # | 8L01-05-001 |
|---|---|
| DIGI-KEY PART # | 306-1019-ND |
| MANUFACTURER | Coto Technology |
| DESCRIPTION | Component Mount TO-18 Circular 0.060" (1.52mm) White |
| DATASHEET | Click Here |
| MFR PART # | 3570-1331-051 |
|---|---|
| DIGI-KEY PART # | 1835-1116-ND |
| MANUFACTURER | Comus International |
| DESCRIPTION | Component Mount TO-18 Circular 0.060" (1.52mm) White |
| DATASHEET | Click Here |
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MediaLinks
Videos
Relay Basics - Another Teaching Moment | DigiKey Electronics | DigiKey
How to Choose a Relay - Another Teaching Moment | DigiKey
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