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Siemens 3RT2037-3XJ40-0LA2 — Contactors

Siemens 3RT2037-3XJ40-0LA2 SIRIUS Contactor, 65 A at 480 V,

MPN3RT2037-3XJ40-0LA2
Active

Siemens SIRIUS, Size S2 contactor, 3RT2037-3XJ40-0LA2, 65 A at 480 V AC, spring-type terminals, extended operating range coil, screw and 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

3RT2037-3XJ40-0LA2 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-3XJ40-0LA2 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V55 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V10 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2037-3XJ40-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2037-3XJ40-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT2037-3XJ40-0LA2 — 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: 125A (690V,100kA), aM: 63A (690V,100kA), BS88: 100A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2037-3XJ40-0LA2 — 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
3RT2037-3XJ40-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-3XJ40-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-3XJ40-0LA2 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth130 mm

Product details

Dimensions are 114 mm high, 55 mm wide, 130 mm deep — the 55 mm width is the critical panel-spacing dimension for DIN-rail fill factor.

The headline 65 A at 480 V and 52 A at 600 V are the AC-1 resistive load ratings — the current the main contacts can carry continuously. For motor switching (AC-3 duty), the actual motor current must be lower; these numbers tell you the contactor can handle the inrush and break the stalled-rotor current of a motor sized within its thermal capacity. The extended operating range coil holds in over a wider voltage band than standard coils, which helps on lines with brownout or sag.

Coil and auxiliary details

The magnet coil uses spring-type terminals — no screw tightening, which speeds wiring in high-volume panel builds. Includes an auxiliary switch for status feedback or interlocking. DC coil dropout timing is 30 to 55 ms; arcing time is 10 to 20 ms, which matters for coordination with upstream protection.

Frequently asked questions

What is the depth of 3RT2037-3XJ40-0LA2?

The depth is 130 mm, with a width of 55 mm and height of 114 mm.

Where can I buy 3RT2037-3XJ40-0LA2?

This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

Will 3RT2037-3XJ40-0LA2 drop into a panel built for 3RT2036-1AC20-ZX95?

Both are Size S2 contactors from the same SIRIUS family with the same 55 mm width and DIN-rail snap-on mounting, so they share the same footprint and rail spacing. The main difference is the coil voltage range and terminal style — verify the coil voltage matches your control circuit before swapping.

MPN
3RT2037-3XJ40-0LA2