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General Purpose Relays Relay Plug-In SPDT 10A 120VAC


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Overview of RH1B-UAC120V

The RH1B-UAC120V is a general-purpose relay with a coil rated for 120V AC applications. It is designed to provide reliable switching for various industrial and commercial control systems, offering versatile and durable performance in a compact package.


(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • NO: Normally Open Contact
  • COM: Common Contact
  • NC: Normally Closed Contact
  • A1: Coil Terminal 1
  • A2: Coil Terminal 2
  • Indicator: LED indicator for relay status

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the RH1B-UAC120V relay for a visual representation.

Key Features

  • 120V AC Coil: The RH1B-UAC120V relay features a coil rated for 120V AC, making it suitable for use in standard AC control circuits.
  • Durable Construction: Constructed with durable materials, this relay ensures reliable performance in demanding industrial environments.
  • Compact Design: With its compact form factor, the RH1B-UAC120V offers space-saving and versatile installation options.
  • LED Indicator: The built-in LED indicator provides visual feedback on the status of the relay, enhancing diagnostic capabilities.
  • Versatile Applications: Suitable for a wide range of applications including motor controls, lighting systems, and industrial automation.

Note: For detailed technical specifications, please refer to the RH1B-UAC120V relay datasheet.


  • Industrial Control Systems: Ideal for use in industrial control panels, PLCs, and motor control systems requiring reliable switching capabilities.
  • Commercial Equipment: Suitable for use in commercial equipment such as vending machines, HVAC systems, and electrical distribution panels.
  • Lighting Control: Used in lighting control systems for switching and control of lighting fixtures in various environments.


The RH1B-UAC120V relay provides reliable switching for 120V AC applications, offering a versatile solution for control and automation systems.

Usage Guide

  • Coil Connections: Connect the 120V AC power supply to the A1 and A2 coil terminals for proper operation.
  • Contact Connections: Use the NO, COM, and NC contacts as required for the specific switching application.
  • Indicator: The LED indicator provides visual feedback on the relay status, aiding in troubleshooting and monitoring.

Frequently Asked Questions

Q: Can the RH1B-UAC120V relay be used in 240V AC applications?
A: The RH1B-UAC120V relay is designed specifically for 120V AC applications. For 240V AC applications, consider using relays rated for the higher voltage.

Q: Is the RH1B-UAC120V suitable for high-temperature environments?
A: The RH1B-UAC120V relay is suitable for operating within standard temperature ranges. For high-temperature environments, consider selecting relays with specialized temperature ratings.


For similar functionalities, consider these alternatives to the RH1B-UAC120V relay:

  • OMRON G2R-1-E 120VAC: A similar general-purpose relay from OMRON with a 120V AC coil rating, offering reliable switching performance.
  • Panasonic JS1-120V-F: This is a 120V AC general-purpose relay from Panasonic, providing versatile switching capabilities for industrial and commercial applications.


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category General Purpose Relays RoHS True
REACH Details Product Power Relays
Type Compact Coil Voltage 120 VAC
Relay Contact Form 1 Form C (SPDT-NO, NC) Contact Current Rating 10 A
Contact Termination Plug In Mounting Style Panel Mount
Switching Voltage 220 VAC, 30 VDC Coil Type Non-Latching
Coil Resistance 8.1 kOhms Coil Current 8.6 mA
Contact Material Silver Cadmium Oxide (AgCdO) Series RH
Length 27.5 mm Width 14 mm
Height 35.6 mm Brand IDEC
Contact Rating 10 A Power Consumption 800 mW
Product Type General Purpose Relays Factory Pack Quantity 1
Subcategory Relays

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