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Normally Open Relays

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Normally Open Power Relays
Normally open OptoMOS® solid state relays make highly efficient and reliable options for keeping circuits open. Unlike electromechanical relays, these semiconductor assemblies contain no moving parts. This prevents fatigue and failure while also providing space and weight savings. Littelfuse makes one-pole, dual-pole, voltage-controlled, and dc-only normally open relays. We also offer relays with two MOSFETs and relays with built-in protection against voltage surges. You will find our OptoMOS relays in data acquisition devices, industrial control modules, medical equipment, meters, and security systems.
  • Available with blocking voltage ratings from 30 V to 1 kV
  • Available with load current ratings from 50 mA to 1 A
  • Available with a very broad range of on-state resistance ratings, from 40 mΩ to 35 Ω
  • Isolation voltage ratings up to 3.75 kV
  • Housings have UL 94 flammability ratings of V-0
  • Output capacitance ratings lower than 50 pF
  • Certified lead-free and RoHS compliant
  • Available with unidirectional or bidirectional polarity
  • Configured with 4, 6, or 8 pins
  • Generate no electromagnetic or radio frequency interference
  • Low drive current requirements
  • Optically isolated inputs and galvanic isolation from input to output

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