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Siemens 3RB1026-2QB0 — Overload Relays

Siemens 3RB1026-2QB0 Solid-State Overload Relay, 6-25A, Clas

MPN3RB1026-2QB0

Siemens SIRIUS 3RB1 solid-state overload relay, 6-25 A, Class 20, screw connection, size S0, manual-automatic reset, current production.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Product details

The Siemens 3RB1026-2QB0 is a solid-state overload relay rated for 6 to 25 A, Class 20 trip curve, meant to be mounted directly onto a contactor. It's a size S0 unit with screw terminals and a manual-automatic reset selector. The solid-state design means no bimetals to drift and no heater packs to swap when you change motor FLA — you dial in the current setting and the Class 20 curve handles the thermal memory electronically.

This relay snaps onto a matching S0 contactor, so the whole assembly takes up one standard DIN-rail slot. The screw connections are straightforward for panel wiring — strip, torque, and go. Out here in the grease, that's a plus: no push-in terminals to fight when the wire's got a little corrosion on it.

Frequently asked questions

What is the closest alternative to the 3RB1026-2QB0 in the Siemens SIRIUS family?

Within the same SIRIUS 3RB1 family, the closest alternative would be a different current range variant. The 3RB1026-2QB0 is specifically the 6-25 A, Class 20, screw-terminal, size S0 version. If your motor FLA falls outside that band, you'd step to the next size up or down in the same series — same form factor and mounting, just a different current setting range.

What compliance documentation does Siemens provide for this part?

The evidence does not list specific compliance documentation such as RoHS, REACH, UL, or IEC certificates for this order code. Standard practice for Siemens SIRIUS components is that they carry CE marking and are designed to IEC/EN 60947-4-1, but you should confirm the exact documentation package with your Siemens contact or request it with your RFQ.

MPN
3RB1026-2QB0