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Siemens 3RT1046-1BB40-0UA0 — Contactors

Siemens 3RT1046-1BB40-0UA0 SIRIUS Power Contactor, Size S3,

MPN3RT1046-1BB40-0UA0

Siemens SIRIUS power contactor, Size S3, 3RT1046-1BB40-0UA0, 55 kW at 500 V AC-3, screw-type terminals, IP20 front, snap-on 35/75 mm 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

3RT1046-1BB40-0UA0 — Identification
ParameterValue
Contactor frame sizeS3
3RT1046-1BB40-0UA0 — 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
3RT1046-1BB40-0UA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1046-1BB40-0UA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1046-1BB40-0UA0 — 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
3RT1046-1BB40-0UA0 — 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
3RT1046-1BB40-0UA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1046-1BB40-0UA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1046-1BB40-0UA0 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth152 mm

Product details

Its AC-3 rating of 55 kW at 500 V means it handles standard squirrel-cage motors up to that power — the rating that typically governs the selection for pump, fan, and conveyor duty. The 80 A AC-4 rating at 400 V covers the more demanding reversing or inching applications where the contactor makes and breaks stalled rotor current.

Snaps onto standard 35 mm or 75 mm DIN rail — no tools needed for the rail mount, though the screw-type main circuit terminals (accepting up to 2x 50 mm² stranded) will need a screwdriver. The 70 mm width and 146 mm height fit a standard S3 footprint, so it drops into existing panel layouts sized for that frame. Side-by-side mounting is permitted, which saves rail space when grouping multiple contactors.

Environmental and Protection

Rated IP20 on the front with the cover or box terminal fitted — sufficient for enclosed panel use where operators don't contact live parts. The terminal itself is IP00 (no finger protection at the wiring point), so the panel door or enclosure provides the outer safeguard. Operating temperature range of -25 to +60 °C covers most indoor industrial environments; storage range extends to -55 to +80 °C.

Frequently asked questions

Where can I buy 3RT1046-1BB40-0UA0 and what is the lead time?

This part is sourced to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ — no stock figures or lead-time numbers are published here, but a quote request will return real-time supply posture.

What is the closest functional alternative to 3RT1046-1BB40-0UA0?

The 3RT1044-1FB46 is a smaller Size S2 contactor in the same SIRIUS family. It will not drop into a panel wired for the S3 frame without rewiring — the footprint, terminal spacing, and current ratings differ. The 3RT1046-1BB40-0UA0 is the correct fit for the S3 frame and 55 kW AC-3 rating.

What compliance documentation does this brand provide?

RoHS compliance is documented with a substance prohibition date of 05/01/2012. The SIRIUS series typically carries UL, CSA, and CE certifications, though specific approval markings for this variant should be verified against the nameplate or manufacturer declaration.

MPN
3RT1046-1BB40-0UA0