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Siemens 3RT1046-1BG40 — Contactors

Siemens 3RT1046-1BG40 SIRIUS Power Contactor, 45 kW AC-2 at

MPN3RT1046-1BG40

Siemens SIRIUS power contactor, size S3, 3RT1046-1BG40, screw-type terminals, 45 kW AC-2 at 400 V, 55 kW at 500 V, snap-on mounting onto 35 mm and 75 mm 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

3RT1046-1BG40 — Identification
ParameterValue
Contactor frame sizeS3
3RT1046-1BG40 — 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
3RT1046-1BG40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1046-1BG40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1046-1BG40 — 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
3RT1046-1BG40 — 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
3RT1046-1BG40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1046-1BG40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1046-1BG40 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth152 mm

Product details

For AC-3 squirrel-cage motors, the power rating climbs to 55 kW at 500 V. The contactor also carries an AC-4 rating of 80 A at 400 V for plugging and inching applications that hammer the contacts harder. Side-by-side mounting is allowed.

Terminal and environmental specs

The contactor accepts solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and max 2x (0.75 to 4 mm²). For stranded wire, it takes 2x (10 to 50 mm²). There's also a solid-or-stranded range of 2x (2.5 to 16 mm²). The enclosure rating is IP20 on the front with cover or box terminal, and IP00 at the terminal itself — so the panel builder needs to account for the open terminal area in the overall IP strategy.

Dimensions are 146 mm height, 70 mm width, and 152 mm depth. The fastening method accepts both screw fixing and snap-on onto 35 mm and 75 mm standard mounting rail, which covers the two most common DIN rail profiles in industrial panels.

MPN
3RT1046-1BG40