The 3RB1025-2SB0: The 3...12 A adjustment range covers motor FLA from fractional-horsepower up to about 5.5 kW at 400 V. Class 20 means the relay allows 20 seconds of locked-rotor current before tripping — the standard for general-purpose induction motors driving pumps, fans, and conveyors. Manual reset forces an operator to clear the fault at the panel, preventing automatic restart after a trip. The size S0 footprint matches Siemens 3RT2 contactors in the same frame; screw terminals accept up to 4 mm² stranded wire.
Siemens 3RB1025-2SB0 Electronic Overload Relay, 3-12A, Class
MPN3RB1025-2SB0
Siemens SIRIUS 3RB1025-2SB0 electronic overload relay, 3...12 A, Class 20, screw connection, manual reset, size S0, for contactor mount.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
What is the trip class and adjustment range of 3RB1025-2SB0?
It is a Class 20 electronic overload relay with a current adjustment range of 3...12 A, suitable for motor full-load currents in that band.
Where can I buy 3RB1025-2SB0 and get current pricing?
This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.
MPN
3RB1025-2SB0