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Siemens 3RT1046-1BM44 — Contactors

Siemens 3RT1046-1BM44 SIRIUS Power Contactor, 80 A AC-4, 45

MPN3RT1046-1BM44

Siemens SIRIUS power contactor, size S3, 3RT1046-1BM44, 45 kW at 400 V AC-2, 80 A AC-4, screw terminals, snap-on DIN rail.

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

3RT1046-1BM44 — Identification
ParameterValue
Contactor frame sizeS3
3RT1046-1BM44 — 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
3RT1046-1BM44 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1046-1BM44 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1046-1BM44 — 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
3RT1046-1BM44 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control 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, solid or stranded2x (2.5 ... 16 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm and 75 mm standard mounting rail
Side-by-side mountingYes
3RT1046-1BM44 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1046-1BM44 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1046-1BM44 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth201 mm

Product details

It is rated for 45 kW at 400 V in AC-2 duty (slip-ring motors, moderate overload) and 80 A in AC-4 duty (reversing, plugging, inching — the hardest motor-switching category).

The 70 mm width and 146 mm height fit a standard S3 contactor footprint; depth is 201 mm including the terminals.

The lifecycle stage is listed as current — meaning Siemens still produces this part as an active catalog item. It carries a RoHS compliance date of 05/01/2012, so it meets the EU substance restrictions for new installations.

Frequently asked questions

What is 3RT1046-1BM44 used for?

It is a power contactor for switching three-phase motor loads in industrial control panels, rated for 45 kW at 400 V in AC-2 duty and 80 A in AC-4 duty.

What compliance documentation does 3RT1046-1BM44 carry?

It is RoHS compliant with a substance prohibition date of 05/01/2012, meeting EU substance restrictions.

Where can I buy 3RT1046-1BM44?

This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

MPN
3RT1046-1BM44