The Omron G7J-3A1B-B-W1-DC24 is an enclosed power relay from the G7J Series, bracket-mounted with screw terminals. Its contact arrangement is 3PST-NO plus one SPST-NC, rated at 25 A continuous. The 24 V DC coil pulls in solidly at nominal voltage; no indicator lamp on this variant, so verify coil status with a meter during commissioning.
Contact ratings and motor duty
The NO contacts carry 25 A at both 240 V AC and 30 V DC; the NC contact is rated 8 A at the same voltages. Horsepower ratings are 1-1/2 hp at 120 V AC and 3 hp at 240 V AC, so this relay handles small three-phase motor loads within those breakpoints — think conveyor drives or pump starters up to 3 hp. Dielectric strength is 4,000 V AC between coil and contacts and between contacts of different polarity; 2,000 V AC between same-polarity contacts.
This part carries a mature lifecycle stage — still in the active catalog but past the early-adoption phase.
Mechanical and electrical endurance
Rated for 100,000 electrical operations and 1,000,000 mechanical operations. The manual push-to-test button aids troubleshooting without energizing the coil. Bracket mounting suits panel or chassis installation where DIN rail isn't available.