Narva Heavy Duty Rocker Switch Off/on Dpst 12V 20A Part No. 63042BL

The Narva Heavy Duty Rocker Switch is a DPST on-off switch with contacts rated at 20A at 12V and 10A at 24V. It uses a 4-terminal push fit design and is identified by Part No. 63042BL, making it suitable where a compact, heavy duty rocker style switch is required for an auto electrical installation.

This switch is non-illuminated and has 2 positions with an On - Off - DPST switch action. The mounting opening is 37.5 x 21mm, so the panel cut-out needs to match that opening for a proper fit.

As supplied, the unit is sold each and weighs 0.03kg. The listed warranty is one year, and the product is grouped under auto elec accessories and fuses, breakers, relays and switches. Those details help when matching the switch to a job where the physical size, terminal count, and electrical rating all matter.

Key Features

• Narva heavy duty rocker switch
• DPST configuration
• On - Off - DPST switch action
• Push fit design with push on terminals
• 4 terminals
• Non-illuminated

Specifications

• Brand: Narva
• Part No.: 63042BL
• Voltage: 12V
• Power rating: 25A
• Contacts rated: 20A at 12V, 10A at 24V
• Number of poles: 2
• Number of positions: 2
• Unit of measure: Each

Application and Buying Notes

Before ordering, check the panel opening carefully against the listed 37.5 x 21mm mounting opening. A rocker switch can look similar to other units, but the cut-out size, terminal layout, and switch action need to line up with the existing panel or new installation point.

The electrical rating is another important checkpoint. This Narva switch is listed at 20A at 12V and 10A at 24V, with a 25A power rating shown in the specifications. Use the correct rating for the circuit it will control, and do not assume the switch suits every accessory or load without checking the application.

The switch has 4 push on terminals and a DPST arrangement, so make sure the wiring layout you have planned suits a double pole switching setup. If you are replacing an existing unit, matching the part number 63042BL or confirming the terminal count and switch action is the safest way to avoid ordering the wrong style.

Because the switch is non-illuminated, it will not provide a lamped indicator. That matters if the original switch in the vehicle or panel uses illumination for visibility or status feedback. The listed lamp colour is not applicable, which is another useful reminder that this is a plain rocker switch rather than a lighted one.

For workshop or in-vehicle use, it is worth checking the physical size and access around the mounting point as well as the load being controlled. A unit weighing 0.03kg and sold as each is a small component, but the correct fit still depends on the right opening, terminal style, and compatible circuit design.

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 63042BL 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) 25, Voltage 12, Number of Poles 2, Switch Type Rocker, Weight 0.03kg, Product Group 1 AUTO ELEC ACCESSORIES, Part No. 63042BL.

Additional published details for cross-checking include Brand NARVA, Description Narva Heavy Duty Rocker Switch Off/On DPST (Contacts Rated 20A @ 12V), Number of Terminals 4, Switch Action On - Off - DPST, Lamp Colour/s Not Applicable, Number of Positions 2, Switch Illumination Non Illuminated, Product Group 2 FUSES BREAKERS RELAYS SWITCHES.

Narva Heavy Duty Rocker Switch Off/On DPST (Contacts Rated 20A @ 12V). Part number 63042BL should be checked first. Listed voltage is 12. Listed output rating is 25. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 63042BL, 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 25 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.

Compatibility note: Confirm compatibility by comparing Part No. 63042BL, the 4-terminal DPST layout, the 37.5 x 21mm mounting opening, and the 12V / 20A contact rating with your existing switch or panel requirements before purchase.

FAQ

What type of switch is this?

It is a Narva heavy duty rocker switch with an On - Off - DPST switch action and 2 positions. It is non-illuminated and uses 4 terminals.

What is the electrical rating?

The listed contacts are rated at 20A at 12V and 10A at 24V. The specifications also show a 25A power rating and 12V voltage.

What mounting opening does it need?

The mounting opening is 37.5 x 21mm. Check the panel cut-out before buying so the switch will sit correctly in the opening.

Is this switch illuminated?

No. The switch illumination is listed as non illuminated, and lamp colour is noted as not applicable.

How many terminals does it have?

It has 4 terminals. It is also described as a DPST switch with 2 poles.

What should I confirm before ordering?

Confirm Part No. 63042BL, the 4-terminal DPST layout, the 37.5 x 21mm mounting opening, and the 12V / 20A contact rating match your application.