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Reed Relays

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About Reed Relays

Reed relays are electrically-operated switching devices that consist of two thin, magnetic strips (reeds) encapsulated in a glass envelope. When a coil around the glass envelope is energized, the resulting magnetic field brings the reeds together and closes the contacts. Most reed relays have higher coil resistances and provide faster switching speeds than standard relays. With normally open (NO) devices, the relay contact pair is open when the coil is not energized. With normally closed (NC) devices, the relay contact pair is closed when the coil is not energized. Changeover relays typically have one set of Form C contacts.

Reed relays vary in terms of contact ratings, coil ratings, and performance specifications. Contact ratings include maximum switching current, maximum AC switching voltage, maximum DC switching voltage, maximum AC switching power, and maximum DC switching power. Coil ratings include AC coil voltage, DC coil voltage, coil resistance, coil nominal AC power, and coil nominal DC power. Performance specifications for reed relays include make time and break time. Make time (operate time, pick-up time) is the time required from actuation to the full current-carrying state. Break time (release time, drop-out time) is the time from deactivation to the open state.

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Engineering Web: Reed Relays

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Part Numbers for Reed Relays

Part # Distributor Manufacturer Product Category Description
R8142-3 REED RELAYS netCOMPONENTS Not Provided Not Provided Not Provided
9007-05-10 Digi-Key Coto Technology Relays RELAY REED SIP SPST 5V W/SHIELD
8L61-05-001 Digi-Key Coto Technology Relays RELAY REED SMD SPDT 5V
B10-03B Digi-Key Coto Technology Relays RELAY REED HI-RF BGA 3.3V SPST
B10-05B Digi-Key Coto Technology Relays RELAY REED HI-RF BGA 5V SPST

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