Reddot Switch - Rotary 3SPD W/rstr RD551940P

Reddot switch, rotary 3-speed with resistor, part number RD551940P, supplied as an individual each. It sits in the cooling product group and is listed under AC components, which makes the part number and description the key checks before ordering.

The listed description is SWITCH - ROTARY 3SPD W/RSTR. That identifies a rotary 3-speed switch with resistor, so matching the exact control style and electrical application matters more than a general switch shape or connector assumption.

This part is backed by a 12 month warranty and is supplied under the Reddot brand. For aftermarket electrical and HVAC-related parts, confirming the part number RD551940P against the existing unit is the safest way to avoid a mismatch.

Because no vehicle fitment details are supplied here, this listing should be treated as a specification-led purchase. The most reliable checks are the part number, the rotary 3-speed with resistor description, and the fact it is catalogued as a switch in cooling/AC components.

Key Features

• Reddot branded switch
• Rotary 3-speed with resistor
• Part number RD551940P
• Listed as a switch
• Supplied as each
• 12 month warranty

Specifications

• Brand: Reddot
• Part No.: RD551940P
• Type: Switch
• Description: Switch - rotary 3spd w/rstr
• Product group 1: Cooling
• Product group 2: AC Components
• Unit of measure: Each
• Warranty: 12 months

Application and Buying Notes

Before ordering, confirm the part number RD551940P on the existing switch or parts reference. The product is described specifically as SWITCH - ROTARY 3SPD W/RSTR, so the control type, speed count, and resistor detail all need to line up with the replacement part.

This item is grouped under Cooling and AC Components, which points to a climate-control or cooling-system related application rather than a general-purpose switch. If the original unit is part of a dash control, HVAC control panel, or cooling control circuit, compare the switch style carefully rather than relying on the generic word switch alone.

The unit is sold individually as each, so if you are replacing more than one control or comparing a complete panel, check whether the vehicle uses a single switch or a matched set. The supplied information does not include connector style, pin count, or vehicle model references, so those details should be verified separately where relevant.

Warranty coverage is listed at 12 months, which is useful when you are replacing an electrical component that has failed through wear or heat exposure. Even so, correct selection still depends on matching the exact RD551940P part number and the rotary 3-speed with resistor specification 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 RD551940P 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 12 Months, Product Group 2 AC COMPONENTS, Part No. RD551940P, Brand REDDOT, Description SWITCH - ROTARY 3SPD W/RSTR, Product Group 1 COOLING.

SWITCH - ROTARY 3SPD W/RSTR. Part number RD551940P should be checked first. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number RD551940P, 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 electrical specification 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 12 Months. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm fitment by matching the part number RD551940P and the description SWITCH - ROTARY 3SPD W/RSTR to the existing unit before purchase. No vehicle fitment data is supplied, so do not rely on model assumptions alone.

FAQ

What is this part?

It is a Reddot switch described as a rotary 3-speed with resistor, part number RD551940P. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering.

What brand is it?

The brand listed is Reddot. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering.

What is the part number?

The part number is RD551940P. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering.

Is a warranty listed?

Yes. The listed warranty is 12 months. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering.

Is vehicle fitment provided?

No vehicle fitment details are supplied. Confirm the part number RD551940P and the rotary 3-speed with resistor description against the original part before ordering. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering.

How is it supplied?

It is supplied as each. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering. For this listing, part number RD551940P is the main reference point. These details should still be checked against the original unit before ordering.