IDEC Relays RH4B-UAC120V Relay

The IDEC RH4B-UAC120V is a heavy-duty 4PDT (4 Form C) compact power relay engineered for high-density industrial control panels and HVACR logic circuits. Rated for 10 Amp switching capacity, this RH Series relay features blade terminals designed for secure interface with standard socket mounts such as the SH4B-05. Its 120VAC coil is optimized for precise actuation in 50/60Hz systems, providing a mechanical life of up to 50 million operations. With a miniature footprint that significantly saves panel space without sacrificing load-handling capability, the RH4B-UAC120V utilizes Silver Cadmium Oxide (AgCdO) contacts to ensure low contact resistance (50m? max) and superior arc resistance. This IDEC 120V relay is a "technician?s choice" for replacing undersized components in blower motor circuits and sequence-on-delay applications, where multi-pole switching of 110/220VAC loads is critical for system reliability.

• High Contact Capacity: Manages up to 10A resistive loads, making it suitable for demanding HVACR motor and solenoid control.
• Multi-Pole Versatility: The 4PDT configuration allows for simultaneous control of four independent circuits from a single 120VAC signal.
• Optimized Form Factor: Miniature housing reduces footprint in crowded control cabinets while maintaining industrial-grade blade terminal connections.
• Broad Environmental Tolerance: Validated for operation in temperatures ranging from -30?C to +70?C, ensuring performance in unconditioned mechanical rooms.
• Certified Reliability: Meets UL, CSA, CE, and TUV standards for safety and global compatibility in commercial equipment.

What is the difference between blade terminals and pin terminals for this series?
The RH4B-UAC120V uses blade terminals, which are designed for plug-in mounting into a compatible DIN-rail or surface-mount socket. This is the preferred standard for HVACR contractors as it allows for rapid field replacement without disturbing the field wiring on the terminal block.

Can this relay be used for inductive motor loads?
Yes, the Silver Cadmium Oxide contacts are specifically chosen for their ability to handle the inrush currents associated with inductive loads. However, always verify that the motor's Full Load Amps (FLA) do not exceed the 10A rating for the specific voltage being switched.

Does this model include a manual check button or LED indicator?
The standard RH4B-UAC120V is the plain style without a check button or light. If your diagnostic workflow requires visual confirmation of coil energy, ensure you are referencing the correct suffix for the indicator model, though this standard unit is often preferred for simplified circuit design.

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.