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Siemens 3RT1025-1BB48-0QA2 — Contactors

Siemens 3RT1025-1BB48-0QA2 SIRIUS Power Contactor, 24 VDC, 3

MPN3RT1025-1BB48-0QA2

Siemens SIRIUS 3RT1025-1BB48-0QA2 power contactor, size S0, 3-pole, 24 VDC coil, screw terminals, 150 mm depth, 55 mm width, 85 mm height.

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

Specifications

3RT1025-1BB48-0QA2 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1BB48-0QA2 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V10 kW
Rated value @ 690 V11 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1025-1BB48-0QA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1025-1BB48-0QA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1BB48-0QA2 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 63 A
Short-circuit coordination type 2, fusefuse gL/gG: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1025-1BB48-0QA2 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1025-1BB48-0QA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1BB48-0QA2 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1025-1BB48-0QA2 — Mechanical
ParameterValue
Width55 mm
Height85 mm
Depth150 mm

Product details

SIRIUS S0 power contactor for motor and resistive loads

The contactor is rated for AC-3 motor switching: 10 kW at 500 V and 11 kW at 690 V, with an AC-4 rated operational current of 15.5 A at 400 V for reversing or inching duty.

Type 1 coordination allows a 63 A gL/gG fuse, which permits the contactor to be replaced after a fault.

Termination and wiring

Main circuit terminals accept solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). For stranded or ferruled wire: 2x (1–2.5 mm²), 2x (2.5–6 mm²), max 2x 10 mm². AWG equivalents: 2x (16–12), 2x (14–10), 1x 8. The auxiliary contact block (3RT1025-1BB48-0QA2 includes one instantaneous N/O + N/C) has its own terminal ratings.

Frequently asked questions

Where can I buy 3RT1025-1BB48-0QA2 and get a price?

This part is sourced to order against an RFQ through independent distribution channels. Submit a request for quote; availability and current pricing are confirmed at quote time.

What is the depth of 3RT1025-1BB48-0QA2?

The depth is 150 mm, with a width of 55 mm and height of 85 mm.

What wire sizes does the 3RT1025-1BB48-0QA2 accept?

Solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). Stranded: 2x (1–2.5 mm²), 2x (2.5–6 mm²), max 2x 10 mm². AWG: 2x (16–12), 2x (14–10), 1x 8.

Will 3RT1025-1BB48-0QA2 drop into a panel specified for 3RT1023-1AL20?

Both are SIRIUS S0-size contactors with the same 55 mm width and DIN-rail mounting, so the footprint is identical. The key difference is the coil voltage: 3RT1025-1BB48-0QA2 uses 24 VDC; verify the 3RT1023-1AL20's coil voltage before substituting. Terminal layouts and auxiliary contact configurations may also differ — check the specific wiring diagram.

MPN
3RT1025-1BB48-0QA2