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Siemens 3RT2346-3XB40-4LA2 — Contactors

Siemens 3RT2346-3XB40-4LA2 SIRIUS Power Contactor, S3

MPN3RT2346-3XB40-4LA2
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Siemens SIRIUS 3RT2346-3XB40-4LA2 power contactor, size S3, 24 V DC coil, spring-type terminals, 70 mm width, 152 mm depth, 140 mm height, screw and snap-on mounting on 35 mm DIN rail per EN 60715.

Siemens 3RT2346-3XB40-4LA2 datasheet (PDF)
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

3RT2346-3XB40-4LA2 — Identification
ParameterValue
Contactor frame sizeS3
3RT2346-3XB40-4LA2 — 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 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V20 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2346-3XB40-4LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2346-3XB40-4LA2 — Contacts & Poles
ParameterValue
Main poles4
Main NO contacts4
3RT2346-3XB40-4LA2 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)
Short-circuit coordination type 2, fusegG: 160 A (690 V, 100 kA), aM: 100 A (690 V, 100 kA), BS88: 125 A (415 V, 80 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2346-3XB40-4LA2 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2346-3XB40-4LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2346-3XB40-4LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2346-3XB40-4LA2 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth152 mm

Product details

The 3RT2346-3XB40-4LA2: The contactor measures 70 mm wide, 152 mm deep, and 140 mm high — a size S3 footprint that occupies three 18 mm DIN-rail modules plus the depth allowance for spring terminals and wiring.

Coil and auxiliary contact ratings

The coil is 24 V DC with an inrush current peak of 6.5 A — the holding current settles after the armature seals, but the power supply must handle that initial surge.

Environmental and lifecycle

Lifecycle status is current production — this part is still a standard catalog item from Siemens, not a legacy or end-of-life product. Mechanical life typical is 10,000,000 operations; the arcing time for main contacts is 10 to 20 ms, and the maximum switching rate in AC-4 duty is 250 operations per hour.

Frequently asked questions

How is 3RT2346-3XB40-4LA2 sourced and quoted?

This part is sourced through independent distribution channels and quoted to order against your BOM quantity.

MPN
3RT2346-3XB40-4LA2