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Siemens 3RT2035-1KB40-1AA0 — Contactors

Siemens 3RT2035-1KB40-1AA0 SIRIUS Coupling Contactor, 24 V C

MPN3RT2035-1KB40-1AA0
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Siemens SIRIUS coupling contactor 3RT2035-1KB40-1AA0, size S2, 24 V DC coil, screw-type terminals, auxiliary switch, screw and snap-on mounting for 35 mm DIN rail.

$106.68Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT2035-1KB40-1AA0 — Identification
ParameterValue
Contactor frame sizeS2
3RT2035-1KB40-1AA0 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V35 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V7.5 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2035-1KB40-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2035-1KB40-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2035-1KB40-1AA0 — 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)
3RT2035-1KB40-1AA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2035-1KB40-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2035-1KB40-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2035-1KB40-1AA0 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth130 mm

Product details

It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, fitting a standard panel footprint at 55 mm wide, 114 mm tall, and 130 mm deep.

Coil and Switching Performance

The 24 V DC coil draws a 2.6 A inrush peak and holds with a typical pickup/dropout time of 30 to 55 ms. Arcing time runs 10 to 20 ms. Switching capacity at 24 V DC is rated 10 A, with derated values at higher voltages: 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. At 230 V AC the contactor handles 7.5 hp motor loads.

Mechanical Life and Operating Cycles

Maximum operating cycles per hour vary by duty: 1 200 at AC-1, 750 at AC-2, 1 000 at AC-3 and AC-3e, and 300 at AC-4.

Mounting position is standing on a horizontal surface. Main contact wiring accepts 2x 0.5 to 1.5 mm² or 2x 0.75 to 2.5 mm² solid or stranded conductors.

Frequently asked questions

What is the coil voltage and switching capacity of 3RT2035-1KB40-1AA0?

The coil is rated 24 V DC. Switching capacity at 24 V DC is 10 A; at 230 V AC it handles 7.5 hp motor loads. Derated values apply at higher DC voltages.

What are the mounting dimensions and clearances for this contactor?

Width 55 mm, height 114 mm, depth 130 mm. Mounts on 35 mm DIN rail per DIN EN 60715. Clearances: 10 mm upward, forward, and downward; 6 mm at the side.

Where can I buy 3RT2035-1KB40-1AA0 and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RT2035-1KB40-1AA0