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Siemens 3RT1046-1XB40-0LA2 — Contactors

Siemens 3RT1046-1XB40-0LA2 SIRIUS Power Contactor, 55 kW at

MPN3RT1046-1XB40-0LA2

Siemens SIRIUS S3 power contactor, 3RT1046-1XB40-0LA2, 55 kW at 500 V AC-3, 24 VDC coil, screw terminals, 152 mm depth.

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

3RT1046-1XB40-0LA2 — Identification
ParameterValue
Contactor frame sizeS3
3RT1046-1XB40-0LA2 — 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
3RT1046-1XB40-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1046-1XB40-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT1046-1XB40-0LA2 — 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
3RT1046-1XB40-0LA2 — 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
3RT1046-1XB40-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1046-1XB40-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1046-1XB40-0LA2 — Mechanical
ParameterValue
Width70 mm
Height176 mm
Depth152 mm

Product details

SIRIUS S3 power contactor — 55 kW at 500 V AC-3

The Siemens SIRIUS 3RT1046-1XB40-0LA2 is a Size S3 power contactor rated for motor switching up to 55 kW at 500 V in AC-3 duty, and 25.4 kW at 690 V.

Duty cycles and thermal limits

Maximum switching rates: 900 operations/hour in AC-1 (resistive), 850 ops/h in AC-3 (motor), 350 in AC-2, and 250 in AC-4 (plugging/inching).

Dimensions: 176 mm height, 70 mm width, 152 mm depth. Solid wire sizes accepted: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). Stranded: 2x (10–50 mm²) for the main circuit, plus 2x (2.5–16 mm²) for auxiliary circuits.

Frequently asked questions

Where can I buy 3RT1046-1XB40-0LA2 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for current pricing and availability.

What is the closest functional second-source to 3RT1046-1XB40-0LA2?

The 3RT1044-1FB46 is a smaller S2 frame with a 400 V coil — it will not drop into a panel wired for this S3 contactor without rewiring the coil circuit and checking terminal capacity.

What are the key ratings of 3RT1046-1XB40-0LA2?

Motor power: 55 kW at 500 V AC-3, 25.4 kW at 690 V AC-3. Coil: 24 VDC, 10 A pickup. Mechanical life: 10 million operations. Screw terminals accept up to 50 mm² stranded.

MPN
3RT1046-1XB40-0LA2