Cole Hersee Marine Rocker Switch Spst On-off 12/24V 20A M58031-01BL

The Cole Hersee Marine Rocker Switch is a single pole single throw (SPST) on-off switch with a 12/24V dual-voltage rating and a 20A current rating at 12V. It is identified by part number M58031-01BL and uses a 21.1mm wide by 36.8mm high panel hole, with a mount diameter listed at 21mm.

It is a rocker-style switch with two blade terminals, silver contacts, and a non-illuminated layout. The switch is supplied with a neoprene panel seal and a wide black bezel, with snap-in mounting for suitable panel installation.

For buyers needing a marine-suitable switch with a compact footprint, the stated dimensions of H 49 x D 39 x W 24mm and a panel thickness range of 2.35mm to 4.73mm are key checks before ordering. The switch is listed as water resistant to IP66 and UL 1500, which may suit exposed or damp locations where sealing matters.

Key Features

• SPST on-off rocker switch
• 12/24V dual-voltage rating
• 20A at 12V, 10A at 24V
• Water resistant to IP66, UL 1500
• Supplied with neoprene panel seal
• 2 blade terminals with silver contacts

Specifications

• Brand: Cole Hersee
• Product type: Switch
• Switch action: On-Off-SPST
• Number of poles: 1
• Number of terminals: 2
• Switch type: Rocker
• Voltage: 12V listed; 12/24V dual voltage feature stated
• Power rating: 20A

Application and Buying Notes

Before ordering, check the panel opening against the stated panel hole size of W 21.1mm and H 36.8mm, and confirm the panel thickness sits within 2.35mm to 4.73mm. Those measurements are the main installation checkpoints for this switch and should be matched carefully to avoid a loose fit or an opening that is too small.

The electrical rating matters as much as the physical size. This switch is listed at 20A at 12V and 10A at 24V, so it should only be used within those limits. The SPST on-off action means it is intended for simple single-circuit switching rather than multi-function control.

The switch has two blade terminals and silver contacts, which is useful to know when matching the wiring style on the vehicle or equipment. As it is non-illuminated, it does not have a lamp function to assist with night visibility, so it suits installations where a plain on-off rocker is preferred.

The overall size of H 49 x D 39 x W 24mm also needs to be checked against available clearance behind the panel. In compact dashboards, switch depth and terminal space can be just as important as the front face opening, particularly when multiple accessories are grouped closely together.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number M58031-01BL helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type SWITCH, Unit of Measure EACH, Warranty One Year, Power Rating (Amp) 20, Voltage 12, Mount Diameter 21mm, Number of Poles 1, Switch Type Rocker, Product Group 2 FUSES BREAKERS RELAYS SWITCHES.

Additional published details for cross-checking include Part No. M58031-01BL, Brand COLE HERSEE, Description Cole Hersee Marine Rocker Switch SPST On/Off, Number of Terminals 2, Switch Action On - Off - SPST, Lamp Colour/s Not Applicable, Mount Length 36mm, Number of Positions 2, Switch Illumination Non Illuminated, Product Group 1 AUTO ELEC ACCESSORIES.

Cole Hersee Marine Rocker Switch SPST On/Off. Part number M58031-01BL should be checked first. Listed voltage is 12. Listed output rating is 20. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number M58031-01BL, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a switch in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 and output 20 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Where no verified application list is available, the part number, mounting details, connector style, and published specifications should be used as the primary selection criteria.

In the absence of a verified fitment list, the safest approach is to compare the removed unit directly with the listed product details. That includes checking the housing style, pulley layout, regulator arrangement, and any visible identification numbers before supply is approved.

The listed warranty is One Year. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm compatibility by checking part number M58031-01BL, the 21.1mm x 36.8mm panel hole, the 2.35mm to 4.73mm panel thickness range, and the 12/24V, 20A at 12V, 10A at 24V electrical ratings before purchase.

FAQ

What type of switch is this?

It is a Cole Hersee rocker switch with SPST on-off action and 1 pole. It has 2 blade terminals and is non-illuminated.

What voltage is it rated for?

The listed feature is 12/24V dual voltage. The specifications also list 12V, with current ratings of 20A at 12V and 10A at 24V.

What panel size does it fit?

The listed panel hole is W 21.1mm x H 36.8mm, with a mount diameter of 21mm. It also fits panels from 2.35mm to 4.73mm thick.

Is it suitable for wet areas?

It is listed as water resistant with an IP66 rating and UL 1500. It is supplied with a neoprene panel seal, which supports installation in exposed or damp locations.

Does it light up?

No. The switch is listed as non-illuminated and the lamp colour is marked not applicable.

What part number should I reference when ordering?

The part number is M58031-01BL.