The Airsource 12V 5-Terminal Blower A/C Relay is designed to protect your control circuit from high voltage or current in the load circuit. This relay features a 30-50A rating. It provides an isolation barrier between the control circuit and the load circuit, ensuring that your control circuit is not damaged by the high voltage or current. This reliable and durable relay is perfect for Freightliner and is sure to provide reliable service. FleetPride is your First Click in Heavy Duty®.