Siemens 3RB31234PB0 Solid State Overload Relay

Siemens 3RB31234PB0 Overload Relay

A solid-state electronic overload relay used to protect small motors. Designed for currents between 1‑4 A, it offers both manual and automatic reset, phase failure/unbalance protection, and mounts directly to a Siemens S0 contactor.

Key Specs

• Current Range: 1 – 4 A

• Contact Form: 1 NO + 1 NC auxiliary contact 

• Power Rating: ~ 0.37 to 1.5 kW (at 400 VAC, 3-phase)

• Mounting / Size: S0 frame, screw terminals, suitable for contactor mounting

• Enclosure Rating: IP20