DC Solenoids and Relays

Cole Hersee is now part of Littelfuse 

Littelfuse acquired Cole Hersee in 2010 to offer their customers a more extensive portfolio of products in the commercial vehicle market. Since Cole Hersee was founded in 1924, they have been a pioneer and leader in the development of heavy-duty electrical products for the vehicle industry, and have earned a reputation for quality and value. Cole Hersee has collaborated on many basic industry standards and is a preferred supplier of over 2,000 dependable vehicle products and accessories.

Littelfuse Cole Hersee Brand products are available as standard or custom designed products to meet customer needs. Contact us to discuss the possibilities. Our engineers are on hand to design from the ground up the best solution to your application.

What Type of Solenoids are Available?

  • 12 V, 24 V, and 36 V
  • Continuous or Intermittent Duty
  • Available in steel or molded housings
  • Latching Solenoids, which is energized and de-energized by a momentary switch
  • Electronic Solenoids rated at 85 A continuous that can be used for voltages from 9 to 31

What is 'Make' and 'Break'?

Make and break are terms which apply to any switching situation, but particularly to Intermittent Duty Solenoids, where the buildup of heat can cause failure of the component. Make and break are RATINGS. A particular component, such as a solenoid, may be rated for duty at a given amperage and voltage that should not be exceeded.

Make is when the switch (or solenoid) is turned On (the circuit is 'made'), and break is when the switch is turned Off (the circuit is 'broken'). Such values would need to be checked with an instrument such as a meter. Note also that Intermittent Duty Solenoids have a limitation on the time (duty cycle) they may be kept On and the time they need to recover (to allow heat dissipation.) 

Vehicle Types

  • Trucks
  • Street Trucks (i.e. Snowplow, Bucket, Garbage, Sweepers)
  • Buses and RVs (i.e. School, Commercial, Transit, Motor Homes)
  • Construction (i.e. Backhoes, Pavers, Bulldozers, Compactors)
  • Agriculture (i.e. Harvesters, Combines, Tractors)
  • Emergency (i.e. Ambulance, Fire, Police)