Value Collection BD-2186-4 Spdt 20/40A Change-over Relay

Product Description

The VALUE COLLECTION BD-2186-4 is a change-over relay designed for automotive electrical applications. It features a Single Pole Double Throw (SPDT) contact form, allowing it to switch between two circuits from a single input signal. Rated at 20/40 amps, this relay handles both low-draw and high-draw circuits commonly found in vehicle accessory and control wiring. It is sold in a package of two units. Automotive electricians, upfitters, and experienced DIY technicians install this type of relay when adding accessories, controlling fans, lights, or other switched loads in 12-volt vehicle systems.

This relay is suited for use in 12-volt automotive and light-duty vehicle electrical systems. Typical applications include aftermarket accessory circuits, horn relays, cooling fan control, lighting upgrades, and other switched-load scenarios where an SPDT change-over configuration is required. The dual amperage rating of 20/40 amps makes it versatile across both signal-level and power-level circuit switching needs.

Key Features

• SPDT change-over contact form supports two-circuit switching from a single control signal
• 20/40 amp dual rating accommodates a range of automotive accessory loads
• Sold as a pack of two relays for backup availability or multi-circuit installations
• Standard automotive relay form factor fits common relay sockets and harnesses

Compatibility

Designed as a standard-form automotive change-over relay suitable for general 12-volt vehicle accessory and control circuit applications. No specific vehicle make, model, or OEM part compatibility is stated by the manufacturer for this part number.

Installation Notes

Installation should be performed by a qualified automotive electrician or experienced upfitter familiar with 12-volt vehicle wiring practices. Disconnect the vehicle battery before working on relay circuits to prevent accidental shorts or component damage. Use a relay socket or proper spade terminals rated for the circuit amperage, and verify the load does not exceed the relay's rated capacity. Follow applicable vehicle wiring standards and accessory installation guidelines when routing and securing harness connections.