Omron G7L-2A-BUBJ-CB AC100_120 General Purpose Relay With Test Button Class B Insulation Screw Terminal Upper Bracket Mounting Double Pole Single Throw Normally Open Contacts 17 to 20.4 mA Rated Load Current 100 to 120 VAC Rated Load Voltage

Omron G7L-2A-BUBJ-CB AC100/120 General Purpose Relay With Test Button, Class B Insulation, Screw Terminal, Upper Bracket Mounting, Double Pole Single Throw Normally Open Contacts, 17 to 20.4 mA Rated Load Current, 100 to 120 VAC Rated Load Voltage OMRON Automation and Safety

Connector Type Screw
Contact Material Silver
Contact Type Normally Open
Current Rating 20.4 Milliamps
Mounting Type Pole

About this item

  • Electric relay with test button for receiving and controlling electric signals and testing operation
  • Screw terminal connection to contacts, upper bracket mounting
  • DPST-NO for simple on/off switching
  • Insulation meets UL Class B for flame resistant materials
  • UL recognized for safety and CSA certified for quality assurance

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 2.7 x 1.5 x 1.9 inches; 5.6 ounces

Product Description

 

This Omron G7L-2A-BUBJ-CB AC100/120 general purpose relay has a test button, Class B rated insulation material, screw terminal connections, upper bracket mounting, and is suitable for use in high capacity voltage applications. This relay has double pole single throw normally open (DPST-NO) contacts, an input current rating of 17 to 20.4 mA and a load rating of 220VAC at 25 amp, with an input of 100 to 120VAC. This relay has a test button for checking the status of operation and Underwriter’s Laboratories (UL) Class B rated insulation material for flame resistance. This general purpose relay is designed to mount to an upper bracket in an equipment rack and is suitable for high capacity voltage applications such as fluid pump controls in the water and chemical processing industries.

Specifications

Contact FormDPST-NOInput Current Rating17 to 20.4 mAInput Voltage100 to 120VACLoad Rating220VAC, 25 ampDielectric Strength4,000VACOperating Temperature-25 to +60 degrees CEnclosure Dimensions*49 x 34.5 x 68.6mm (H x W x D)Standards MetUL (Underwriter’s Laboratories)
CSA (Canadian Standards Association)

*H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Relay switches (also called an electrical relay or an electrical relay switch) use a small amount of power to control a larger source of power connected to electrical devices such as car motors, computers, and lighting installations. A basic relay switch has a control circuit with an electromagnetic coil and a load circuit with contacts and a lever. When current flows into the relay switch, it moves through the coil and a magnetic field is created, which causes the lever in the load circuit to move between contacts, either turning the device on or off. In a normally open (NO) relay switch, when power is supplied to the relay, the load circuit is closed and the power source connected to the relay is turned on. In a normally closed (NC) relay switch, when power is supplied to the relay, the load circuit is open and the power source connected to the relay is turned off. In other types of relay switches, non-moving parts such as transistors or semiconductors can be used as the control circuit to operate the switching mechanism. Relay switches can be controlled with an external switch, such as a light switch, or they can be connected to an automatically switched power source, such as a car ignition. One relay can operate multiple switches, and multiple relays can be operated with a single switch, with each relay operating independently from the other relays in the system.

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Description

Here’s a breakdown of the Omron G7L-2A-BUBJ-CB AC100/120 General Purpose Relay in a pros/cons + Q&A style overview:

✅ Pros

  • High Capacity: Can handle significant AC loads (100–120 VAC) with a rated load current of 17–20.4 mA, making it suitable for industrial and commercial applications.
  • Double Pole Single Throw (DPST-NO): Provides reliable switching for circuits requiring simultaneous operation on two lines.
  • Test Button: Convenient feature for quick manual operation and troubleshooting without energizing the coil.
  • Screw Terminal Connections: Secure and easy wiring compared to PCB-only types.
  • Upper Bracket Mounting: Designed for secure installation in panels or enclosures.
  • Durable Construction: Omron relays are known for reliability and long service life.
  • Class B Insulation: Provides adequate thermal endurance for moderate heat environments.

⚠️ Cons

  • Bulky Size: Larger than PCB relays, which may limit use in compact enclosures.
  • AC Coil Only: Designed specifically for 100–120 VAC coil input; not suitable for DC-controlled circuits.
  • Moderate Current Range: 17–20.4 mA coil consumption may be high for very low-power control systems.
  • Limited Functionality: Only Normally Open (NO) contacts; lacks Normally Closed (NC) options for more flexible control.
  • Mounting Specificity: Requires proper bracket mounting, not as flexible as plug-in relay bases.

❓ Q&A

Q1: What type of applications is this relay best suited for?
A1: Ideal for industrial control panels, HVAC systems, motor control, power distribution, and other general-purpose AC load switching where high reliability is needed.

Q2: Can this relay be used in DC circuits?
A2: No, this version is designed for AC coil voltage (100–120 VAC). A DC coil variant would be required for DC control applications.

Q3: How does the test button help in real-world use?
A3: The test button allows manual operation of the relay without energizing the coil, which is useful for maintenance checks, troubleshooting, and verifying circuit function.

Q4: Is this relay suitable for continuous-duty applications?
A4: Yes, thanks to its Class B insulation and Omron’s robust design, it is well-suited for continuous-duty operation as long as it stays within rated load and temperature limits.

Q5: What are the mounting considerations?
A5: It uses upper bracket mounting with screw terminals, making it secure for industrial installations but less convenient than DIN-rail or plug-in relays.

Would you like me to also provide a comparison chart against a smaller relay option (like a plug-in DIN-rail relay), so you can see trade-offs in size, flexibility, and cost?

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