IDEC Relays RH3B-UAC120V Relay

For industrial automation and HVACR control systems requiring high switching density, the IDEC RH3B-UAC120V relay provides a reliable 3PDT (3-pole double throw) configuration in a midget, space-saving footprint. This RH Series compact power relay is a standard-setting component for engineers and contractors who need robust performance without the bulk of larger RR series models. Operating with a 120VAC coil, it features high-grade silver cadmium oxide (AgCdO) contacts specifically designed to mitigate voltage arcing and ensure long-term electrical stability across its 10Amp contact rating.

The blade terminal design facilitates a fast, secure connection into standard 11-pin sockets, such as the IDEC SH3B-05, making it a drop-in replacement for many OEM control panels. With an operating temperature range of -30°C to +70°C and UL recognized, CSA certified, and CE marked status, this industrial general purpose relay is built to maintain 5,000,000 mechanical operations. Whether you are managing compressor staging, motor control, or complex interlocking logic, the RH3B-UAC120V ensures consistent switching with a maximum operate/release time of 25ms.

• High Switching Capacity: Handles up to 10A at 110VAC/30VDC, suitable for demanding industrial and HVACR loads.
• Space-Efficient Design: Miniature "midget" size allows for higher component density on DIN rails or within crowded control enclosures.
• Superior Contact Material: Silver cadmium oxide contacts provide excellent conductivity and resistance to contact welding.
• Universal Compatibility: Standard terminal arrangement ensures the relay plugs into a wide variety of competitor and third-party sockets.
• Environmental Resilience: Rated for a wide temperature window and 45% to 85% relative humidity for reliable use in mechanical rooms.

What socket is required for the RH3B-UAC120V?
This relay uses a standard 11-pin terminal layout and is commonly paired with the IDEC SH3B-05 DIN rail or surface mount socket. It is also compatible with most equivalent 11-pin blade-style sockets used in the industry.

Can this relay be used for DC motor control?
Yes, while it features a 120VAC coil, the contacts are rated for up to 10A at 30VDC, making it suitable for low-voltage DC switching applications.

How does this compare to the IDEC RR series?
The RH series offers the same 10A contact rating as the RR series but in a significantly more compact "midget" housing and uses blade terminals instead of pin terminals, saving valuable panel space.

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.