Skip to main content
Siemens 3RT1026-3BW44 — Contactors

Siemens SIRIUS 3RT1026-3BW44 Power Contactor, S0, 11 kW at 4

MPN3RT1026-3BW44

Siemens SIRIUS power contactor, size S0, 3RT1026-3BW44, 11 kW at 400 V AC-3, screw-type terminals, 2 NC auxiliary contacts, IP20 front, IP00 terminals.

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

3RT1026-3BW44 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-3BW44 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V11 kW
Rated value @ 690 V11 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
3RT1026-3BW44 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1026-3BW44 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-3BW44 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 100 A
Short-circuit coordination type 2, fusefuse gL/gG: 35 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1026-3BW44 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Side-by-side mountingYes
3RT1026-3BW44 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-3BW44 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-3BW44 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth150 mm

Product details

The contactor carries 2 normally-closed instantaneous auxiliary contacts. At 24 V they're rated 10 A, at 230 V they're rated 6 A, and at 400 V they're rated 3 A. That covers most control-voltage ranges you'll see in a panel — 24 VDC control circuits, 230 VAC pilot duty, or 400 VAC interlocking. That's a continuous-duty coil — no pulse-width economizer needed, but it does mean the coil stays warm. The front face carries IP20 finger protection; the terminals themselves are IP00, so they're live when the panel door is open. That's standard for this class — the panel enclosure provides the overall ingress protection.

That's a documentation detail for panel builders who tag their drawings to the standard.

That's the spec the panel designer needs to match to the branch circuit protection. That's a long service life for a contactor in a cycling application — well above the electrical life under full load, which will be lower and depends on the switching category.

Frequently asked questions

What are the key motor ratings for this contactor?

At AC-3 duty it switches 11 kW at both 400 V and 690 V. At AC-4 duty (reversing or inching) the current rating is 15.5 A at 400 V. For resistive loads (AC-12) the maximum operating current is 10 A.

What wire sizes does the main terminal block accept?

Screw terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm² stranded. AWG equivalents are 2x (16 to 12), 2x (14 to 10), or 1x 8. Auxiliary contacts accept 2x (0.25 to 2.5 mm²) solid.

What is the mounting footprint and clearance requirement?

It snaps onto 35 mm DIN rail per DIN EN 50022. The housing is 45 mm wide, 85 mm high, and 150 mm deep. Side-by-side mounting is allowed with 6 mm clearance at the side — no additional gap between units.

What protection coordination fuses are specified?

For Type 2 coordination (no damage to the contactor) use a gL/gG 35 A fuse upstream. For Type 1 coordination (contactor may be sacrificial) use a gL/gG 100 A fuse.

MPN
3RT1026-3BW44