IDEC Relays RH4B-UTAC120V Relay

The IDEC RH4B-UTAC120V is a heavy-duty 4PDT power relay designed for reliable switching in high-density industrial control panels. Featuring a 120V AC coil and a 10A contact capacity, this compact midget relay provides four independent poles of double-throw switching in a space-saving housing. The RH series is a standard amongst HVACR contractors for its silver cadmium oxide (AgCdO) contacts, which effectively minimize voltage arcing and prevent contact welding under inductive loads. This specific blade terminal relay includes the top bracket mounting (flange) configuration, allowing for direct surface mounting in applications where a DIN rail socket is not preferred. With a fast 25ms maximum operating time and UL/CSA certifications, it is optimized for motor control, valve actuation, and complex lighting circuits requiring multiple signal paths.

Key Benefits

• High switching capacity: Handles up to 10A resistive or 7.5A inductive loads, suitable for fractional horsepower motors and high-current HVAC actuators.
• 4PDT configuration: Four sets of independent Form C contacts allow for simultaneous control of multiple circuits or redundant signal feedback.
• Top mounting flange: Integrated bracket enables secure surface mounting without the added height of a standard plug-in socket.
• Industrial-grade terminals: Features 0.187-inch flat blade terminals for low-resistance connections and compatibility with standard quick-connect wiring.
• Enhanced thermal range: Operational between -30?C to +70?C, making it reliable for rooftop units and unconditioned mechanical rooms.

Common Questions

• What socket should be used with the RH4B-UTAC120V? While this version features a top bracket for surface mounting, it can still be paired with the SH4B-05 or SH4B-05C DIN rail sockets if the bracket is removed or accommodated.
• Does this relay include a manual test button or LED indicator? The "UT" suffix denotes the top mounting bracket style. This basic configuration does not typically include the manual check button or LED status light found on 'UC' or 'UL' models.
• Can this 120VAC relay handle DC loads? Yes, the contacts are rated for up to 30V DC at 10A, making it versatile for mixed-voltage control systems.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.