PRODUCT NAME : FUJI ELECTRIC FA, THERMAL OVERLOAD RELAY-TR-5-1NH,3, TR20DH-R, 2.8-4.2A
COMPANY NAME : FUJI ELECTRIC CO. LTD
MODEL NUMBER : TR20DH-R, 2.8-4.2A

PRODUCT DESCRIPTION :

TR-5-1NH is likely a thermal overload relay in Fuji Electric’s FA series. Thermal overload relays are used in electrical motor protection circuits to protect the motor from overheating due to excessive current. They work by simulating the thermal characteristics of the motor, allowing the relay to trip and disconnect the motor if it gets too hot.

TR20DH-R could be a specific type of relay designed for a certain set of motor ratings or applications. The TR series by Fuji Electric generally includes various types of overload relays, so TR20DH-R may refer to a higher rating or a variant suitable for specific control systems. The relay is adjustable within a current range of 2.8 to 4.2 Amps, meaning it is designed to protect motors operating in that current range.