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Siemens 3RT2036-3XB40-0LA2 — Contactors

Siemens 3RT2036-3XB40-0LA2 SIRIUS Contactor, 24 V DC, 52 A a

MPN3RT2036-3XB40-0LA2
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Siemens SIRIUS, contactor, size S2, 24 V DC coil, spring-type terminals, 52 A at 480 V, 130 mm depth, 55 mm width, 114 mm height.

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

3RT2036-3XB40-0LA2 — Identification
ParameterValue
Contactor frame sizeS2
3RT2036-3XB40-0LA2 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V41 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
3RT2036-3XB40-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2036-3XB40-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT2036-3XB40-0LA2 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 160 A (690 V, 100 kA), aM: 80 A (690 V, 100 kA), BS88: 125 A (415 V, 80 kA)
Short-circuit coordination type 2, fusegG: 80A (690V,100kA), aM: 50A (690V,100kA), BS88: 63A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2036-3XB40-0LA2 — 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
3RT2036-3XB40-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2036-3XB40-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2036-3XB40-0LA2 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth130 mm

Product details

SIRIUS 3RT2036-3XB40-0LA2 — 24 V DC Contactor, Size S2, Spring-Terminal

It carries a 52 A rated operational current at both 480 V and 600 V, and is rated for 10 hp at 230 V — so it handles motor loads up to that power class on a 230 V line. The DC coil draws a 3 A inrush peak, with a holding current of 0.7 A at 24 V nominal. Dropout time on DC is 30 to 55 ms, and arcing time runs 10 to 20 ms, which matters for contactor coordination in a motor starter.

Ratings and Switching Capacity

For DC switching, the contactor is rated at 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These DC ratings are per pole — useful for switching DC loads like solenoids or DC motor brakes. The AC-4 maximum switching frequency is 250 operations per hour, which sets a ceiling for heavy-duty jogging or inching applications. The main contacts are 3-pole (3 NO). An auxiliary switch is built in. The contactor carries a typical mechanical life of 10 million operations, per the datasheet.

Spring-type terminals accept 2 x (0.5 to 2.5 mm²) solid or stranded wire. This is a tool-less termination — strip to the correct length and push in. No screw torque to verify, which saves time on repetitive panel wiring.

Frequently asked questions

What is the closest functional alternative to 3RT2036-3XB40-0LA2?

The 3RT2037-1AL20-ZX95 is a peer in the same SIRIUS size S2 family, but with different coil voltage and terminal type. Verify coil compatibility before substituting — this unit uses a 24 V DC coil with spring terminals, while the peer may differ. The physical footprint (130 mm depth, 55 mm width, 114 mm height) and DIN-rail mounting are shared, so it can drop into the same panel cutout if the coil voltage matches.

Where can I buy 3RT2036-3XB40-0LA2 and how is it quoted?

This part is sourced to order against an RFQ through independent distribution channels. Submit an RFQ with your quantity and target delivery date; availability and current pricing are confirmed at quote time.

What are the key dimensions of 3RT2036-3XB40-0LA2?

Depth is 130 mm, width is 55 mm, height is 114 mm. These dimensions match the SIRIUS size S2 footprint.

What compliance documentation does Siemens provide for this contactor?

As a SIRIUS product, it carries CE marking and is designed to meet IEC/EN 60947-4-1 standards. RoHS and REACH compliance declarations are available from Siemens documentation. The DIN-rail mounting conforms to DIN EN 60715.

MPN
3RT2036-3XB40-0LA2