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Cole Hersee


Cole Hersee

Cole Hersee is the leading manufacturer of electromechanical, electronic and digital switches and connectors. They have been manufacturing dependable products for the heavy duty vehicle industry and to the marine trade since 1920. Their engineers work with OEMs to create innovative switching and connector solutions.

Cole Hersee Switches


Electronic Dimmer & Rheostat
  • Use switches to dim interior lights, for heater, heater-defroster or air-conditioning control. Choose from classic ceramic rheostat types or the new electronic dimmers with negligible-heat generation. Choose from rotary and push-pull types.
  • Headlamp & Headlamp Dimmer
  • These useful switches change headlights from low to high beam, or select lighting combinations. Choose from panel- or floor-mounted Ignition.
  • Cole Hersee ignition switches Momentary Switches
  • They're often used as starters. The most commonly used type is the 'push to start' (Off-On, spring return to Off).
  • Door/Momentary Switch
  • Opening or closing of a door or safety gate actuates these switches, so they can be used to control internal lighting or for safety purposes.
  • Cole Hersee 91800 has override. 91050 operates five circuits.
  • Push-Pull Switches
  • One- or two-circuit switches operated by a push or pull of the knob. See also Headlamp Push-Pull Switches.
  • Rocker
  • Cole Hersees broad rocker switch selection gives you lots of choice: different actuator styles, mounting options, terminals, imprints, lighted or unlit.
  • Rotary & Fuel Tank
  • Use for a variety of functions such as lighting or ignition. Fuel tank switches are for 2- or 4-tank vehicles.
  • Senders & Temperature
  • These devices monitor engine temperature. Use switches with one or two pilot lights (Hot or Hot & Cold). Use senders with gauges.


  • Cole Hersee starter and battery switches Q: What is the preferred mounting for a Momentary Push-Pull Switch?
    They are best mounted on a vertical (or close to vertical) panel. Avoid mounting them on an exposed panel that is more horizontal than vertical.

    Q: Can I have a different knob on my Push-Pull Switch?
    Sure. Choose chromium-plated solid brass knobs in a variety of styles, or plastic knobs. Plastic knobs all have a metal core that provides a solid connection to the spindle of the switch. You will need to consider shaft size, threads (if any) and symbol or text.

    Q: I need to control one load from two different locations with a Push-Pull Switch.What type of switch should I use?
    Use Cole Hersee M-630 Push-Pull Switch. It's an On-On switch. Install one in each location and wire them to control the Off-On function of a single load.

    Q: I need to mount an SPST Push-Pull switch so that the knob side of the switch will be exposed to the weather.
    Try not to mount it so that it will be exposed to the full force of nature. If it has be exposed to the elements then the preferred mounting is on a vertical panel, rather than being mounted at an angle to the weather. A switch such as our 50066 would be a good choice because it has an o-ring in the mounting stem that gives an added protection against the inclemency of the weather.

    Q: Can I replace the bulb in any of your toggle or rocker switches?
    The bulbs are wired inside the switch and therefore cannot be replaced. Cole Hersee uses a long lasting bulb so that the need for bulb replacement is unlikely in a normal automotive application.

    Q: Can I use your non-lighted toggle or rocker switches in 110V AC applications?
    Except for switches M-493, 5507 and similar switches, none of our switches are officially rated for AC voltage application. While Cole Hersee is confident some of them can, it is totally up to the end user to determine their suitability for such application.

    Q: Can I use your non-lighted toggle and rocker switches at 24V DC?
    Yes. They are rated at 12V, so you must reduce the amp rating by half to obtain the same durability.

    Cole Hersee Electronics

    As the vehicle industry migrates to electronic systems, Cole Hersee is keeping pace by introducing innovative electronic switching solutions.

    Cole Hersee electronics Q:What is the difference between a sender and a switch?
    A switch creates a situation that is all or nothing. That is, it allows current to flow or not to flow. The current that flows is not graduated, and is suitable to actuate a pilot light. A sender gives a variable signal of graduated intensity that is suitable to actuate a gauge, indicating a certain level.
    Our temperature switches have a mechanical contact that is actuated on or off with changes in the temperature surrounding the switch. A temperature senders have a resistive element that varies depending on the surrounding temperature. The temperature sender provides a resistance value to the gauge causing the gauge to fluctuate.

    Q: What's the difference between an insulated and a non-insulated switch?
    In an insulated switch, the contacts are isolated from the chassis ground or engine block.
    In a non-insulated switch, the contacts short to the chassis ground or engine block when the switch makes, essentially providing a ground connection to your load.

    Q: Can I use your non-insulated pressure or temperature switches with 110V AC?
    No. These switches are not rated for 110V AC application. Have a knowledgeable electrician determine suitability for your application.

    Q:Can I use your pressure or temperature switches to operate a gauge?
    No. You need a temperature or pressure sender.

    Q: Can your pressure switches handle more pressure than the On/Off rated pressure?
    Generally Yes. These switches have an On/Off rated pressure and a higher safe burst pressure. For your own safety your system pressure should be less than the burst pressure. Before you install a pressure switch, you should always determine your maximum system pressure first.

    Q:What is the advantage of using a Electronic Dimmer instead of the Rheostat type?
    1. Solid state devices dissipate very little power.They are either fully on or fully off. The power dissipation of a Rheostat Dimmer is proportional to the maximum load current, independent of the position of the dimmer. The energy used to overcome the resistance produces heat.2. Electronic dimmers are not load sensitive.Changing the load (for example by adding or removing a light) will not produce a noticeable difference in brightness of a light.3 Electronic dimmers are considerably more efficient.There is less loss in the feed cables and substantially less loss (more than 50 times) in the dimmer unit itself. It therefore doesn't generate a noticeable amount of heat.

    Q:Can I use Electronic Dimmers to control the speed of the motor?
    Typical Electronic Dimmers can supply power to motors and make them run, but the dimmers aren't designed for it. Connecting inductive loads to dimmers can damage them.

    Cole Hersee Circuit Protection


    Circuit Breakers
  • Cole Hersee has a breaker for every vehicle. Stud (can) style or plug-in, Types I II and III
  • Brackets
  • To hold stud (can) style breakers, snap-in or screw-down.
  • Busbars
  • Solid copper or brass, from 2- to 12-gang.
  • Fuses
  • Maxi, Mini, ATC, and Glass AGC
  • Fuse & Breaker Blocks
  • For glass fuses or plug-in fuses and breakers.
  • Terminal Blocks
  • A wide variety of styles.


  • Q:What's the difference between the M-412 type Fuse Blocks and the 4622?
    The M-412 type is all brass construction and the 4622 has steel rivets in them.

    Q:What size breaker or fuse can I use in a 46377 type Circuit Breaker/ Fuse Block?
    The breaker or fuse should not be rated for more than 25A per breaker or fuse with the total of all items used not to be more than 150A.

    Cole Hersee Solenoids


    Q: What types of solenoids do you have?
    Cole Hersee has about 50 of solenoids including 12V, 24V, and 36V continuous or intermittent duty solenoids. The also manufacture steel or molded bakelite housings and plasticized housings for weather-resistance. Cole Hersee also produces a latching solenoid, which is energized and de-energized by a momentary switch. Their electronic solenoid rated at 85A continuous that can be used for voltages from 9 to 31.

    Cole Hersee solenoid Q: How much current does the control circuit in a solenoid draw?
    Generally, the control circuit for a continuous duty solenoid rated at 12V DC draws approximately ae of an ampere. The control circuit for a 24V DC continuous duty solenoid draws approximately 0.3 amps. An intermittent duty 12V DC solenoid draws approximately 3A, and the 24V DC about 1.2A.

    Q: My continuous duty solenoid gets hot. Is something wrong?
    The coil circuit (control circuit) in a continuous duty solenoid is usually energized for long periods of time. Under these conditions the coil will generate heat and within less than an hour the solenoid housing will become hot to the touch. This is normal. Always make sure that all wiring is properly sized for the load it is carrying, that the terminals are the correct size and have been securely crimped to the wire, that the terminals have the proper torque to the solenoid studs. Alternatively, you might be able to use the Latching Solenoid that only needs a one-time momentary actuation to stay in the On position.

    Q: Are there any special mounting instructions for solenoids?
    Electromechanical solenoids should be mounted on a non-vibrating surface such as a fender well or firewall. They should not be mounted on a surface that vibrates such as an engine, as this may reduce the lifetime of the component. Continuous duty solenoids should be mounted in an area that has ventilation, as the coil circuit normally generates heat. Orientation of the solenoid, i.e. bracket up, bracket down, or bracket at right angle to the ground does not usually affect solenoid performance. Electronic solenoids are much more rugged, because they have no moving parts. They also will stand up to an incredible one million On-Off cycles.

    Q: 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.)

    Q: I just installed a 24420 continuous duty solenoid on my road bus. With no load on the secondary contacts, the can runs warm to hot when energized.
    If this is a normal event, then I have no problem. I always assumed that continuous duty solenoids ran cool.
    Cole Hersee solenoid2 When the coil is energized continuously the heat from the coil circuit causes the can to run warm to hot. This is normal. Cole Hersee solenoids No. 24400, 24401, 24402, and 24401-01 are similar, but have two modes of continuous duty service which makes them suitable for forward and reverse systems in some applications.
    Without the coil energized the contacts which are closed are rated at 35A. In this instance the can should not run hot. With the coil energized the contacts which were closed open and the contacts which were open close. The circuit that is closed is rated at 85A.
    When the coil is energized continuously the heat from the coil circuit causes the can to run warm to hot.
    Cole Hersee 24400, 24401, 24402, and 24401-01 are commonly used in forward and reverse systems in golf carts, garden tractors, winches, fork lift trucks, and many other applications.

    Cole Hersee Wiring Products

    Cole Hersee has the solutions to connecting wire, fuses and breakers, and the clamps, clips and cleats to secure the wire harnesses.

    Cole Hersee wiring Fuse & Breaker Blocks
  • For glass fuses or plug-in fuses and breakers.

  • Fuse & Breaker Holders
  • For glass fuses or plug-in fuses and breakers.

  • Flasher Connectors
  • For standard 3-prong flasher units.

  • Sealed Beam Connector
  • To connect sealed beam headlights.

  • Dimmer Switch Connectors
  • For use with Cole Hersee Switches 7762, 7702, 7776.

  • Jumper Terminals
  • Make battery connections at easily-accessible locations, inside or outside the vehicle.

  • Wire Terminals/ Connectors
  • Universal connectors for rapid connections on equipment and vehicles.

  • Switch Boots & Caps
  • For protection against the weather, salt spray, dust, etc.

  • Switch Boots
  • Protect against dirt and moisture.

  • Switch Caps
  • For protection of momentary push-button switches.

  • Protective Boots
  • For protection of sockets and other components.


  • Hardware

    Clips, Clamps & Cleats
  • For easy installation of wire harnesses, cable or conduit.

  • Knobs
  • A wide selection in chrome-plated brass or plastic, with or without SAE symbols.

  • Brackets
  • To hold stud (can) style breakers, snap-in or screw-down.


  • Nuts

    Nuts
  • Plated steel or brass for mounting of switches, or to fit terminals.

  • Face Nuts
  • Chrome- or nickel-plated brass or aluminum.

  • Wire Terminals/ Connectors
  • Universal connectors for rapid connections on equipment and vehicles.

  • Gaskets
  • Seals out dirt, road splash.


  • Battery-Related Products


    Battery Disconnect
  • Master Disconnect Switches protect against theft, accidental starting and battery drain. Cole Hersee has switches for 125A through 2000A.
  • Battery Isolators
  • These solid-state parts prevent the battery with the higher charge draining into the lower. They also allow to batteries to be charged at the same time from one source.
  • Buzzers, Alarms & Indicator Lights
  • These components give visual and audible feedback that lets you know your systems are operating smoothly or about to cause trouble.
  • Alarms & Buzzers
  • Use these audible/flashing alarms with sensor switches: oil, air, vacuum, neutral safety, backup (see appropriate sections) or with door switches or regular switches.
  • Indicator Lights
  • Choose from a wide selection of pilot indicator lights: different styles, lenses, colors, mounting options, single- or double-contact.
  • Lamp Sockets
  • Solidly-constructed from brass, plated steel or rugged plastic. Single- or double-contact, with or without J-slots.
  • Panel, Map & Utility Lights
  • Housings that typically mount on a panel to illuminate a small area on a vehicle or boat.
  • Cole Hersee battery

    Q: What is the voltage drop between the center stud (alternator terminal) and the battery terminals?
    The forward voltage drop is approximately from 0.7V to 1V (Function of the forward current)

    Q: According to the wiring diagram the battery to the "S" must be connected to the primary terminal (yellow wire). My alternator does not have an "S" terminal.
    In this case disregard this part of the installation instruction.

    Q: How is the Battery Isolator current capability defined?
    Maximum alternator rating is the maximum charging current capability of the Battery Isolator for both batteries. Maximum current per leg is a half of the maximum alternator current rating.

    Q:What type of Battery Isolator should be used with the Delcotron CS Series alternator?
    Use the four terminal Battery Isolator (Cole Hersee 48122, 48092 or 48162). The fourth terminal (#10 stud) is used to excite the alternator .It supplies +12V to the alternator when the ignition switch is turned On.

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