Thunder Rocker Switch On/off Spst 12V Illuminated 20A - TDR11058

The Thunder rocker switch TDR11058 is a 12V, 20A switch with SPST On-Off action and red LED illumination. It is supplied with 4 blade terminals and is listed with a mount size of 20mm x 35mm, with a mount length of 34.5mm noted in the specifications.

This is a practical electrical control switch for 12V vehicle applications where a simple two-position On-Off function is needed. The contacts are rated at 20A @ 12V, so the current draw of the circuit needs to stay within that limit and the installation should suit a 4-terminal rocker switch.

The switch is identified as part number TDR11058 and is sold as a single unit. It sits in the auto electrical accessories group, under fuses, breakers, relays and switches, which makes it a straightforward choice for replacing a similar rocker switch or adding a controlled 12V accessory circuit.

Key Features

• 12V rocker switch
• 20A contact rating
• SPST On-Off operation
• Red LED illuminated
• 4 blade terminals

Specifications

• Brand: Thunder
• Part No.: TDR11058
• Product type: Switch
• Switch type: Rocker
• Switch action: On-Off - SPST
• Voltage: 12V
• Power rating: 20A
• Number of terminals: 4

Application and Buying Notes

Before buying, check the part number TDR11058 against the switch you are replacing, because the key match points here are the 12V rating, 20A contact rating, SPST On-Off action and the 4 blade terminals. If your existing switch uses a different terminal layout, different mount size, or a different switching style, it may not be a direct replacement.

The listed mount size is 20mm x 35mm, with mount length shown as 34.5mm. Those dimensions matter when you are fitting the switch into a dash, panel or accessory housing, so measure the opening carefully rather than relying on the outside face of the switch alone.

The red LED illumination is a useful identification feature, but it does not change the electrical job of the switch. The important checks are still voltage, current load and terminal count. A 12V switch should be used in a 12V system, and the circuit should be suitable for the 20A rating.

Because this is a rocker switch with 4 blade terminals, take time to confirm the wiring arrangement before installation. If the replacement switch you are comparing it with has a different terminal pattern or a different number of positions, it is worth verifying the application before ordering.

The one year warranty applies to the product as supplied, so keep the part number and purchase details with your records. If you are unsure whether it is the correct switch for your vehicle or accessory setup, compare the old switch, the panel opening and the circuit requirements before fitting.

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 TDR11058 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 34.5mm, Number of Poles 2, Switch Type Rocker, Switch Illumination Illuminated.

Additional published details for cross-checking include Product Group 2 FUSES BREAKERS RELAYS SWITCHES, Part No. TDR11058, Brand THUNDER, Description Thunder Rocker Switch On/Off SPST 12V Illuminated (Contacts Rated 20A @ 12V), Number of Terminals 4, Switch Action On - Off - SPST, Lamp Colour/s Red, Note Mount size 20mm x 35mm, Number of Positions 2, Item Type Switch.

Thunder Rocker Switch On/Off SPST 12V Illuminated (Contacts Rated 20A @ 12V). Part number TDR11058 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 TDR11058, 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.

Compatibility note: Please confirm compatibility using part number TDR11058, the 12V system requirement, the 20A rating, the SPST On-Off action, and the 20mm x 35mm mount size before ordering or installing.

FAQ

What is the part number for this Thunder rocker switch?

The part number is TDR11058. For this listing, part number TDR11058 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 is the switch designed for?

It is listed as a 12V switch. For this listing, part number TDR11058 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 current rating?

The contact rating is 20A at 12V. For this listing, part number TDR11058 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 4 blade terminals. For this listing, part number TDR11058 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?

Yes. It is listed as illuminated with a red LED. For this listing, part number TDR11058 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 mounting size should I check against my panel opening?

The mount size is listed as 20mm x 35mm, with a mount length of 34.5mm also noted. For this listing, part number TDR11058 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.