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General Purpose Relays Relay Plug-In SPDT 10A 24VAC


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Overview of RH1B-ULAC24V

The RH1B-ULAC24V is a power relay with a 24V AC coil voltage, designed for switching high-power electrical circuits. This relay offers a reliable and efficient solution for controlling electrical loads in various applications.


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

  • COM: Common terminal
  • NO: Normally open contact
  • NC: Normally closed contact
  • A1: Coil terminal 1
  • A2: Coil terminal 2

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the RH1B-ULAC24V relay for a visual representation.

Key Features

  • Power Relay: The RH1B-ULAC24V is a power relay capable of switching high-power electrical loads.
  • 24V AC Coil Voltage: Designed to operate with a 24V AC coil voltage, suitable for various industrial applications.
  • Reliable Performance: This relay offers reliable performance and long-term durability in switching applications.
  • Compact Design: With a compact form factor, the RH1B-ULAC24V relay allows for space-saving installation.
  • Easy Installation: The relay features clearly labeled terminals for easy and hassle-free installation.

Note: For detailed technical specifications, please refer to the RH1B-ULAC24V datasheet.


  • Industrial Automation: Ideal for use in industrial automation systems for controlling various electrical loads.
  • Home Appliances: Suitable for controlling electrical components in home appliances such as HVAC systems and lighting.
  • Power Distribution: Used in power distribution systems for switching electrical circuits safely and efficiently.


The RH1B-ULAC24V power relay is designed to provide reliable switching capabilities for high-power electrical circuits. It offers a safe and effective solution for controlling electrical loads in diverse applications.

Usage Guide

  • Coil Connection: Connect terminals A1 and A2 to the 24V AC power source for activating the relay coil.
  • Contact Connections: Use the COM terminal along with NO or NC based on the desired switching configuration.
  • Load Connection: Connect the electrical load to the NO or NC contact of the relay based on the intended switching operation.

Frequently Asked Questions

Q: Is the RH1B-ULAC24V suitable for high-current applications?
A: Yes, the RH1B-ULAC24V is designed to handle high-current loads, making it suitable for various high-power applications.

Q: Can the RH1B-ULAC24V be used in both industrial and residential settings?
A: Absolutely, the RH1B-ULAC24V is versatile and can be utilized in industrial automation systems as well as home appliances for efficient load control.


For similar functionalities, consider these alternatives to the RH1B-ULAC24V:

  • G2R-1A: A 24V AC power relay from Omron with similar specifications and performance characteristics.
  • HHC68A-1Z: This is a power relay with a 24V AC coil voltage, offering reliable switching for high-power 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 24 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 300 Ohms Coil Current 42 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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