Revolution Toggle Switch Mom On - Off - Mom On - Spdt 20A 12V 56-90129BLR

The Revolution toggle switch is a 12V, 20A switch with Mom On - Off - Mom On - SPDT action and 3 blade terminals. It suits applications where a momentary centre-off control is needed, with the switch returning to the off position when released from either momentary side.

It uses a 12mm diameter mounting hole and has a 3mm mount length, so panel preparation needs to match those dimensions before installation. The unit is supplied as an each item and carries part number 56-90129BLR.

This switch is non-illuminated and includes a metal On/Off/On label. With 1 pole, 3 positions and 3 terminals, it is a straightforward electrical control component for suitable 12V circuits where the current demand stays within the 20A rating.

Key Features

• Toggle switch with Mom On - Off - Mom On action
• SPDT contacts rated 20A at 12V
• 3 blade terminals
• 12mm diameter mounting hole
• Non-illuminated switch body
• Includes metal On/Off/On label

Specifications

• Brand: Revolution
• Part No.: 56-90129BLR
• Product type: Switch
• Switch type: Toggle
• Switch action: Mom On - Off - Mom On - SPDT
• Power rating: 20A
• Voltage: 12V
• Number of poles: 1

Application and Buying Notes

Before buying, check the panel opening carefully against the 12mm mounting hole requirement and allow for the 3mm mount length. A toggle switch can look similar to other dash switches, but a small difference in hole size or panel thickness can prevent proper installation.

The electrical side also matters. This Revolution switch is rated at 20A and 12V, so it should only be used in circuits that suit that rating. Confirm the circuit load, wire size, and terminal style before fitting, especially because this model uses 3 blade terminals.

The switch action is Mom On - Off - Mom On - SPDT, which means it is designed for momentary control in both directions with an off position in the centre. That makes it different from a maintained on/off switch, so matching the switch action to the job is just as important as matching the mounting dimensions.

If you are replacing an existing switch, the part number 56-90129BLR is the most reliable reference alongside the physical specifications. The included metal On/Off/On label may also be useful when confirming that the switch layout matches the intended control position in the vehicle or accessory panel.

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 56-90129BLR 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 12mm, Number of Poles 1, Switch Type Toggle, Weight .04kg, Product Group 1 AUTO ELEC ACCESSORIES.

Additional published details for cross-checking include Part No. 56-90129BLR, Brand REVOLUTION, Description Revolution Toggle Switch Mom On - Off - Mom On - SPDT (Contacts Rated 20A @ 12V), Number of Terminals 3, Switch Action Mom On - Off - Mom On - SPDT, Lamp Colour/s Not Applicable, Mount Length 3mm, Number of Positions 3, Switch Illumination Non Illuminated.

Revolution Toggle Switch Mom On - Off - Mom On - SPDT (Contacts Rated 20A @ 12V). Part number 56-90129BLR 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 56-90129BLR, 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.

Compatibility note: Confirm fitment by comparing the part number 56-90129BLR, the 12mm mounting hole requirement, the 3 blade terminals, and the Mom On - Off - Mom On - SPDT action with your existing switch and circuit before purchasing.

FAQ

What is the switch action on this Revolution unit?

It is Mom On - Off - Mom On - SPDT, so it provides momentary operation on both sides with a centre off position. For this listing, part number 56-90129BLR is the main reference point. Listed voltage is 12. Listed output rating is 20. These details should still be checked against the original unit before ordering.

What voltage and current rating does it have?

The switch is rated at 12V and 20A. For this listing, part number 56-90129BLR is the main reference point. Listed voltage is 12. Listed output rating is 20. These details should still be checked against the original unit before ordering.

How many terminals does it use?

It has 3 blade terminals. For this listing, part number 56-90129BLR is the main reference point. Listed voltage is 12. Listed output rating is 20. These details should still be checked against the original unit before ordering.

What size mounting hole is required?

It requires a 12mm diameter mounting hole. For this listing, part number 56-90129BLR is the main reference point. Listed voltage is 12. Listed output rating is 20. These details should still be checked against the original unit before ordering.

Is the switch illuminated?

No. It is listed as non-illuminated, and lamp colour is not applicable. For this listing, part number 56-90129BLR is the main reference point. Listed voltage is 12. Listed output rating is 20. These details should still be checked against the original unit before ordering.

What should I check before ordering for a replacement?

Confirm the part number 56-90129BLR, the 12mm mounting hole, the 3 terminal layout, and the Mom On - Off - Mom On - SPDT action against your existing switch and application. For this listing, part number 56-90129BLR is the main reference point. Listed voltage is 12. Listed output rating is 20. These details should still be checked against the original unit before ordering.