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Siemens 3RT1034-1BN40 — Contactors

Siemens 3RT1034-1BN40 SIRIUS Power Contactor, S2 Frame, 18.5

MPN3RT1034-1BN40

Siemens SIRIUS power contactor, S2 frame, 3RT1034-1BN40, 18.5 kW AC-3 at 500 V, screw terminals, DIN rail mount.

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

3RT1034-1BN40 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-1BN40 — 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
3RT1034-1BN40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1034-1BN40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1034-1BN40 — 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
3RT1034-1BN40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded2x (0.75 ... 16 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 standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1034-1BN40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-1BN40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-1BN40 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth130 mm

Product details

The 130 mm depth leaves clearance for wiring ducts or adjacent components.

The headline motor ratings are 18.5 kW at 500 V and 10 kW at 690 V under AC-3 duty — that is the category for starting squirrel-cage motors and disconnecting them while running, which covers most conveyor, pump, and fan applications. For AC-2 duty (slip-ring motors, moderate overloads) it is rated 15 kW at 400 V. For AC-4 (plugging, inching, reversing) it handles 29 A at 400 V — a tougher thermal cycle, so the switching frequency drops to 250 operations per hour versus 1 000 for AC-3. The auxiliary contact ratings cover a range of control voltages: 10 A at 24 V DC, 6 A at 230 V AC, and 0.3 A at 220 V DC — enough for PLC inputs or relay coils in the control circuit.

Environmental Fit and Compliance

The front face carries IP20 finger protection; the terminals are IP00, so the contactor expects enclosure protection around the wiring zone.

Frequently asked questions

What are the key motor ratings for this contactor?

AC-3 duty: 18.5 kW at 500 V and 10 kW at 690 V. AC-2 at 400 V: 15 kW. AC-4 at 400 V: 29 A.

What is the physical size and mounting method?

S2 frame, 55 mm wide, 112 mm high, 130 mm deep. Screw and snap-on mounting onto 35 mm DIN rail per DIN EN 50022.

What compliance documentation is available?

RoHS compliance is confirmed with a substance prohibition date of 05/01/2012. The contactor carries IP20 front protection and is rated for pollution degree 3.

What wire sizes does the screw terminal accept?

Solid: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (0.75 to 25 mm²).

MPN
3RT1034-1BN40