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Siemens 3RT1325-1BW40 — Contactors

Siemens SIRIUS 3RT1325-1BW40 power contactor, S0, 4 NO, 7.5

MPN3RT1325-1BW40

Siemens SIRIUS power contactor, size S0, 4 NO main contacts, screw terminals, 7.5 kW at AC-2 400 V, 24 VDC coil, 61 mm wide.

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

3RT1325-1BW40 — Identification
ParameterValue
Contactor frame sizeS0
3RT1325-1BW40 — Ratings & Performance
ParameterValue
Rated value @ 400 V3 A
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
3RT1325-1BW40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1325-1BW40 — Contacts & Poles
ParameterValue
Main poles4
Main NO contacts4
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1325-1BW40 — 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
3RT1325-1BW40 — 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
3RT1325-1BW40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1325-1BW40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1325-1BW40 — Mechanical
ParameterValue
Width61 mm
Height85 mm
Depth101 mm

Product details

With four NO main contacts, this contactor can switch a three-phase motor plus a spare pole for an auxiliary load or a separate circuit. The auxiliary contact block is rated across a range of control voltages: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V — so the same contact block works across 24 VDC PLC outputs and 230 VAC pilot circuits without derating surprises. Front protection is IP20, so it's touch-safe but not washdown-rated; the terminal area is IP00, meaning live parts are exposed when the terminals are open.

Wiring and integration details

Main circuit terminals accept solid conductors from 2x (0.5 to 1.5 mm²) up to 2x (0.75 to 4 mm²), and stranded conductors from 2x (1 to 2.5 mm²) up to 2x 10 mm² — covering most standard motor feeder cables. AWG equivalents for the main contacts are 2x (20 to 16) solid, 2x (18 to 14) stranded, and 1x 12. Overall dimensions are 85 mm height, 61 mm width, and 101 mm depth — fits standard S0 contactor footprints.

It's a Siemens SIRIUS series contactor, a widely used platform with broad availability of accessories like auxiliary contact blocks, surge suppressors, and mechanical interlocks.

Frequently asked questions

What wire sizes does the 3RT1325-1BW40 accept?

Main terminals accept solid 2x (0.5 to 1.5 mm²) up to 2x (0.75 to 4 mm²), and stranded 2x (1 to 2.5 mm²) up to 2x 10 mm², or AWG equivalents 2x (20 to 16) solid and 2x (18 to 14) stranded.

MPN
3RT1325-1BW40