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Siemens 3RT1034-3XF40-0LA2 — Contactors

Siemens 3RT1034-3XF40-0LA2 SIRIUS Power Contactor, S2 Size,

MPN3RT1034-3XF40-0LA2

Siemens SIRIUS power contactor, S2 size, 3RT1034-3XF40-0LA2, 18.5 kW at 500 V AC-3, screw-type terminals, 55 mm width, snap-on DIN rail mounting.

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

3RT1034-3XF40-0LA2 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-3XF40-0LA2 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V29 A
Rated value @ 400 V3 A
Rated value @ 500 V18.5 kW
Rated value @ 690 V10 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
3RT1034-3XF40-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1034-3XF40-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT1034-3XF40-0LA2 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 125 A
Short-circuit coordination type 2, fusefuse gL/gG: 63 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1034-3XF40-0LA2 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (0.75 ... 16 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1034-3XF40-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-3XF40-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-3XF40-0LA2 — Mechanical
ParameterValue
Width55 mm
Height142 mm
Depth130 mm

Product details

The Siemens SIRIUS 3RT1034-3XF40-0LA2 is a size S2 power contactor rated for motor switching at 18.5 kW at 500 V in AC-3 duty, and 15 kW at 400 V in AC-2 duty.

Side-by-side mounting is permitted, with clearances of 10 mm upwards, downwards, forwards, and at the side. The 130 mm depth fits standard 200 mm deep enclosures without crowding the wiring duct.

Ratings & Duty

Rated for AC-3 motor switching at 18.5 kW at 500 V and 10 kW at 690 V. The AC-1 resistive load rating supports 1,200 operations per hour maximum; AC-3 duty allows 1,000 ops/h, while AC-4 (plugging/reversing) is limited to 250 ops/h. DC auxiliary contacts are rated 10 A at 24 V, 1 A at 110 V, and 0.3 A at 220 V. DC switching time is 20 to 30 ms.

The contactor carries a typical mechanical life of 10 million operations.

Frequently asked questions

How do I get current pricing and availability for 3RT1034-3XF40-0LA2?

Submit an RFQ through this listing; we source it to order with availability and current pricing confirmed at quote time.

What is 3RT1034-3XF40-0LA2's depth?

The listed depth is 130 mm.

What wire sizes does the 3RT1034-3XF40-0LA2 accept on the main terminals?

The screw-type main terminals accept solid or stranded conductors: 2x (0.25 to 2.5 mm²) for solid, and 2x (0.75 to 25 mm²) for stranded.

Will 3RT1034-3XF40-0LA2 drop into a panel specified around 3RT1044-1FB46?

The 3RT1044-1FB46 is a larger frame size (S3 vs S2) with higher current ratings; the 3RT1034-3XF40-0LA2 will not directly replace it without rewiring and checking the mounting footprint.

MPN
3RT1034-3XF40-0LA2