112045 DC MOTOR SOFT START RELAY

Spec sheet

Collected from 1 supplier page - confirm fit with the supplier before ordering.

The Trans/Air DC Motor Soft Start Relay (Part #112045) is a specialized electronic module designed to protect the electrical systems in shuttle buses and other commercial vehicles. Its primary function is to reduce the large inrush of electrical current that occurs when a high-draw DC motor, such as an A/C condenser fan or blower motor, first starts up. By gradually ramping up the power instead of allowing an instant surge, this relay prevents damage to fuses, wiring, and the motor itself.

Suppliers (1)

• Carpenter Bus Parts

  112045 DC MOTOR SOFT START RELAY · In stock

  Checked Oct 28, 2026
  $233.00
  View at supplier

Specifications and fitment

Part Number

112045

Manufacturer

Trans/Air

Application

Soft start control for high-amperage 12V DC motors.

Voltage

12V DC

Amperage

33A Continuous

Wire Colors

Orange (Input), Red (Output), Green (Ground)

Weight

.1 lbs

Dimensions

.1 × .1 × .1 in

Features

• Integrated wiring pigtail for easy installation
• Prevents damage to electrical system
• Mitigates startup current spikes
• Enhances reliability of HVAC systems
• Extends the life of fan motors

Fits

• Shuttle buses
• Commercial vehicles

Price history