Narva Sealed Rocker Switch On/on Spdt 20A 12V Part No. 63104BL

The Narva Sealed Rocker Switch On/On SPDT, part number 63104BL, is a 1-pole rocker switch with 3 terminals and a non-illuminated face. It is rated at 20A on 12V systems and 10A on 24V systems, so it suits lower-voltage automotive electrical circuits where the load is within those limits.

It uses an On-On SPDT switching action and a push fit design with push on terminals. The mounting opening is 37.5 x 21mm, with a mount length of 37.5mm, which makes the physical cut-out an important check before installation.

This switch is sold as an each unit and carries a one year warranty. As with any switch replacement, the key points are the part number 63104BL, the 37.5 x 21mm mounting opening, and the 12V or 24V amperage rating that matches the circuit it will control.

Key Features

• Narva sealed rocker switch
• On-On SPDT switching action
• 3 terminals, 1 pole
• Push fit design with push on terminals
• Non illuminated switch
• Mounting opening 37.5 x 21mm

Specifications

• Brand: Narva
• Part No.: 63104BL
• Product type: Switch
• Switch type: Rocker
• Switch action: On - On - SPDT
• Number of positions: 2
• Number of terminals: 3
• Number of poles: 1

Application and Buying Notes

Before ordering, confirm the switch cut-out in your panel is 37.5 x 21mm and that you have space for the 37.5mm mount length. A switch can look similar from the front but still be unsuitable if the opening size or mounting arrangement is different.

Check the electrical rating against the circuit you plan to use. This switch is rated at 20A at 12V and 10A at 24V, so the connected load should stay within those limits. If the circuit draws more than the switch is rated for, it should not be used.

The On-On SPDT action means the switch changes between two positions rather than returning to centre. With 3 terminals and a push on terminal arrangement, it is important to match the wiring layout to the intended circuit function before installation.

Because the switch is non illuminated, it does not provide a built-in lamp indication. If the application relies on a backlight or status light, this model needs to be checked carefully against the requirements of the panel or 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 63104BL 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 Length 37.5mm, Number of Positions 2, Switch Illumination Non Illuminated, Product Group 2 FUSES BREAKERS RELAYS SWITCHES.

Additional published details for cross-checking include Part No. 63104BL, Brand NARVA, Description Narva Sealed Rocker Switch On/On SPDT (Contacts Rated 20A @ 12V), Number of Terminals 3, Switch Action On - On - SPDT, Lamp Colour/s Not Applicable, Number of Poles 1, Switch Type Rocker, Weight 0.04kg, Product Group 1 AUTO ELEC ACCESSORIES.

Narva Sealed Rocker Switch On/On SPDT (Contacts Rated 20A @ 12V). Part number 63104BL 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 63104BL, 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 compatibility by matching the part number 63104BL, the On-On SPDT function, the 3-terminal layout, and the 37.5 x 21mm mounting opening with your existing switch and panel before purchase.

FAQ

What is the part number for this Narva rocker switch?

The part number is 63104BL. For this listing, part number 63104BL 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 this switch illuminated?

No. It is listed as non illuminated, and the lamp colour is not applicable. For this listing, part number 63104BL 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 have?

It has 3 terminals. For this listing, part number 63104BL 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 is the electrical rating?

It is rated at 20A at 12V and 10A at 24V. For this listing, part number 63104BL 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 cut-out does it need?

The mounting opening is 37.5 x 21mm, and the mount length is 37.5mm. For this listing, part number 63104BL 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.

Does it have one or two switch positions?

It is listed as a 2-position switch with On - On - SPDT action. For this listing, part number 63104BL 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.