This Product Selection Guide contains information to help select products in the High Frequency (RF) Relays category on DigiKey.com
High frequency and RF (radio frequency) relays are high switch speed, high reliability, and RF insulated relays designed for use in computers, testing equipment, and radio broadcast systems. Additional features may include an internal diode, magnetic shielding, and hermetic seals. These surface mount and through-hole relays are differentiated by operation and release time, coil current, and contact rating. Contact forms include DPDT, SPDT, and SPST configurations.
SelectionCharacteristics
Coil Type: Whether the coil is latching or non-latching, single or dual coil.
Coil Current: The nominal current flow through a relay’s control coil when the indicated coil voltage is applied.
Coil Voltage: The rated voltage the relay needs to be energized.
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 see Switch Basics, Examples of Pole and Throw
Contact Rating (Current): Typically the maximum 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…
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 the 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 the removal of power from the device coil and all contacts returning to their resting position. Does not include bounce time, and may be affected by the choice of control circuitry.
Features: These are different capabilities or properties of the device such as a diode or magnetic shield.
Mounting Type: Indicates how the device is attached.
Terminations Style: Selection of termination style used to connect the device to a system, such as axial or PC pin.
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.
ProductExamples
| MFR PART # | CRF05-1A |
|---|---|
| DIGI-KEY PART # | 374-1041-2-ND |
| MANUFACTURER | Standex-Meder Electronics |
| DESCRIPTION | Component Mount TO-18 Circular 0.060" (1.52mm) White |
| DATASHEET | Click Here |
| MFR PART # | G6K-2P-RF DC24 |
|---|---|
| DIGI-KEY PART # | Z5458-ND |
| MANUFACTURER | Omron Electronics Inc-EMC Div |
| DESCRIPTION | Component Mount TO-18 Circular 0.060" (1.52mm) White |
| DATASHEET | Click Here |
| MFR PART # | ARS144H |
|---|---|
| DIGI-KEY PART # | 255-4180-5-ND |
| MANUFACTURER | Panasonic Electric Works |
| DESCRIPTION | Component Mount TO-18 Circular 0.060" (1.52mm) White |
| DATASHEET | Click Here |
| MFR PART # | 9002-05-00 |
|---|---|
| DIGI-KEY PART # | 306-1059-ND |
| MANUFACTURER | Coto Technology |
| DESCRIPTION | Component Mount TO-18 Circular 0.060" (1.52mm) White |
| DATASHEET | Click Here |
SchematicSymbol
Schematic symbol courtesy of Scheme-it. Please see their website for more information and symbols.
MediaLinks
Videos
Relay Basics - Another Teaching Moment
How to Choose a Relay - Another Teaching Moment