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Siemens 3RT1046-3BB40 — Contactors

Siemens 3RT1046-3BB40 SIRIUS Power Contactor, 55 kW at 500 V

MPN3RT1046-3BB40

Siemens SIRIUS 3RT1046-3BB40 power contactor, S3 frame, 55 kW at 500 V AC-3, 24 VDC coil, screw terminals, IP20 front, active production.

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

3RT1046-3BB40 — Identification
ParameterValue
Contactor frame sizeS3
3RT1046-3BB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V80 A
Rated value @ 400 V3 A
Rated value @ 500 V55 kW
Rated value @ 690 V25.4 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
3RT1046-3BB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1046-3BB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1046-3BB40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fusefuse gL/gG: 160 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1046-3BB40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (2.5 ... 16 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm and 75 mm standard mounting rail
Side-by-side mountingYes
3RT1046-3BB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1046-3BB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1046-3BB40 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth152 mm

Product details

It is rated for 55 kW at 500 V in AC-3 duty (squirrel-cage motor starting) and 25.4 kW at 690 V, so it handles common European 400 V and 500 V motor circuits up to those power levels. The coil is 24 VDC, drawing 10 A at rated voltage — a standard PLC or safety relay output drives it directly with a free-wheel diode across the coil.

Mounts via screw or snap-on onto 35 mm or 75 mm standard DIN rail — the S3 frame footprint is 70 mm wide, 146 mm high, 152 mm deep. The front terminals are IP20 rated with the cover installed, so the panel interior stays protected against accidental contact. Main circuit connections are screw-type terminals accepting 2x (10... 50 mm²) stranded or 2x (0.25... 2.5 mm²) solid — sized for the full 55 kW motor feed. Auxiliary contact terminals accept 2x (2.5... 16 mm²) solid or stranded.

Frequently asked questions

What are the key ratings for this contactor?

It is rated for 55 kW at 500 V AC-3, 25.4 kW at 690 V AC-3, and 80 A at 400 V AC-4. The coil is 24 VDC drawing 10 A. Mechanical life is typical 10 million operations.

What compliance documentation does this part have?

RoHS compliance date is May 1, 2012. The front terminals are IP20 rated. The part is designed for pollution degree 3 environments.

MPN
3RT1046-3BB40