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Siemens 3RT1034-1BW44 — Contactors

Siemens 3RT1034-1BW44 SIRIUS Power Contactor, 55 mm, 18.5 kW

MPN3RT1034-1BW44

Siemens SIRIUS power contactor, size S2, 3RT1034-1BW44, 55 mm width, screw-type terminals, 18.5 kW at 500 V AC-3, IP20 front.

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

3RT1034-1BW44 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-1BW44 — 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
3RT1034-1BW44 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1034-1BW44 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1034-1BW44 — 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
3RT1034-1BW44 — 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
3RT1034-1BW44 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-1BW44 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-1BW44 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth179 mm

Product details

Rated for AC-3 duty at 500 V, it delivers 18.5 kW — the rating that governs motor switching for pumps, fans, and compressors. At 690 V AC-3, the rating drops to 10 kW, reflecting the derating at higher voltage. For AC-2 applications (slip-ring motors), it handles 15 kW at 400 V. Auxiliary contacts are rated for 24 V DC at 10 A, 60 V DC at 2 A, 110 V DC at 1 A, 220 V DC at 0.3 A, and 230 V AC at 6 A — covering typical control-circuit loads like PLC inputs and relay coils. Switching frequency reaches 1 200 cycles/hour at AC-1 (resistive load), 1 000 cycles/hour at AC-3, and 250 cycles/hour at AC-4 — the buyer should match the duty cycle to the application; high-inching duty requires the lower AC-4 limit. Mechanical life is rated at 10 000 000 operations typical, with arcing time of 10–15 ms and DC operating time of 20–30 ms. The contactor operates from -25 °C to +60 °C and stores from -55 °C to +80 °C, with pollution degree 3 (conductive pollution, typical for industrial enclosures).

Screw-type terminals accept solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). Stranded conductors: 2x (0.75–25 mm²). Solid or stranded: 2x (0.75–16 mm²). At 40 °C, the minimum permissible conductor cross-section is 16 mm².

Frequently asked questions

Where can I buy 3RT1034-1BW44 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing.

What are the key ratings of 3RT1034-1BW44?

It is a size S2 power contactor rated 18.5 kW at 500 V AC-3, 10 kW at 690 V AC-3, with screw-type terminals and IP20 front protection.

What compliance documentation does Siemens provide for 3RT1034-1BW44?

The part carries a substance prohibition date of 01.05.2012, indicating RoHS compliance from that date. Standard Siemens documentation includes the datasheet and CE declaration.

MPN
3RT1034-1BW44