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Siemens 3RT1026-3BB44-3MA0 — Contactors

Siemens SIRIUS 3RT1026-3BB44-3MA0 Power Contactor, S0, 11 kW

MPN3RT1026-3BB44-3MA0

Siemens SIRIUS power contactor, S0 frame, 3RT1026-3BB44-3MA0, 11 kW AC-2 at 400 V, 24 VDC coil, screw terminals, IP20 front, snap-on DIN rail.

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

3RT1026-3BB44-3MA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-3BB44-3MA0 — 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
3RT1026-3BB44-3MA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1026-3BB44-3MA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-3BB44-3MA0 — 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
3RT1026-3BB44-3MA0 — 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
3RT1026-3BB44-3MA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-3BB44-3MA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-3BB44-3MA0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth150 mm

Product details

Rated for 11 kW at 400 V in AC-2 duty (slip-ring motor starting), it handles 15.5 A in AC-4 (plugging/inching) at the same voltage. The AC-12 resistive load rating is 10 A, covering control circuit isolation needs.

Screw-type terminals on the main circuit accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or a single 10 mm² conductor. Solid wire range is 2x (0.25 to 2.5 mm²). AWG equivalents: 2x (16 to 12), 2x (14 to 10), or 1x 8 for the main contacts. The contactor stands 85 mm tall and 150 mm deep, so factor that into gland-plate clearance and enclosure depth.

Short-Circuit Coordination and Lifecycle

This matters when the contactor sits in a branch with high fault current — the fuse limits let-through energy to protect downstream loads. The DC coil's holding power stays at 5.4 W, so no additional thermal load from a holding-economy resistor is needed.

Frequently asked questions

What are the key motor ratings for this contactor?

It is rated for 11 kW at 400 V in AC-2 duty (slip-ring motor starting) and 15.5 A in AC-4 duty (plugging/inching) at the same voltage. The AC-12 resistive load rating is 10 A.

What is the coil voltage and power consumption?

The coil is 24 VDC, consuming 5.4 W for both closing and holding. It is a DC magnet with no holding-economy circuit needed.

What wire sizes does the screw terminal accept?

Main circuit terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or up to 1x 10 mm². Solid wire range is 2x (0.25 to 2.5 mm²). AWG equivalents are 2x (16 to 12), 2x (14 to 10), or 1x 8.

What is the physical size and mounting method?

The S0 frame measures 45 mm wide, 85 mm tall, and 150 mm deep. It mounts via screw and snap-on onto a 35 mm DIN rail per EN 50022. Side-by-side mounting is allowed with 6 mm clearance.

MPN
3RT1026-3BB44-3MA0