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Siemens 3RB1015-2NB0 — Overload Relays

Siemens 3RB1015-2NB0 Electronic Overload Relay, 0.4-1.6A, Si

MPN3RB1015-2NB0

Siemens SIRIUS 3RB1015-2NB0 electronic overload relay, 0.4-1.6 A, contactor mount, class 20, screw connection, manual reset only, size S00.

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

Product details

The Siemens 3RB1015-2NB0 is an electronic overload relay in the SIRIUS 3RB1 series, rated 0.4 to 1.6 A and sized for the S00 contactor footprint. It mounts directly onto the matching contactor — no separate DIN-rail slot needed, which keeps the panel layout tight. Class 20 trip curve means it allows up to 20 seconds at 600% of the set current before tripping, matching the starting profile of standard induction motors driving pumps, fans, or conveyors.

Integration notes

Only manual reset is available — no auto-reset option on this variant, so plan for a technician to physically reset after a trip event. The relay communicates no status over a bus; it's a standalone protection device wired in series with the contactor coil.

Frequently asked questions

What is the current setting range and trip class?

The overload relay is rated 0.4 to 1.6 A with a Class 20 trip curve, providing 20 seconds of overload tolerance at 600% of set current before tripping.

Does this relay mount on a DIN rail or directly on a contactor?

It is designed for contactor mount (size S00 footprint), not for standalone DIN-rail mounting. It attaches directly to the matching Siemens contactor.

What reset mode does this variant have?

Only manual reset is available on this variant. After a trip, a technician must physically press the reset button to restore operation.

MPN
3RB1015-2NB0