Skip to main content
Log in
Siemens 3RT1026-1BG44 — Contactors

Siemens 3RT1026-1BG44 SIRIUS Power Contactor, S0, 45mm, AC-4

MPN3RT1026-1BG44

Siemens SIRIUS 3RT1026-1BG44 power contactor, size S0, 45 mm width, screw-type terminals, AC-4 rated 15.5 A at 400 V, 11 kW motor power at 500 V, 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

3RT1026-1BG44 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1BG44 — 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
3RT1026-1BG44 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1026-1BG44 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1BG44 — 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
3RT1026-1BG44 — Connection & Mounting
ParameterValue
Main 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, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1026-1BG44 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1BG44 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1BG44 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth150 mm

Product details

For AC-3 duty (normal motor start/stop), it's rated for 11 kW at 500 V and 11 kW at 690 V, covering common three-phase motor sizes across 400-690 V line supplies. The coil draws 5.4 W on DC hold — a continuous-duty coil that stays cool in a sealed enclosure, so no derating needed for the holding power.

Main circuit terminals accept screw-type connections: 2x (0.5...1.5 mm²) solid, 2x (0.75...2.5 mm²) stranded, up to 2x 4 mm² max. For AWG, that's 2x (16...12) solid, 2x (14...10) stranded, or 1x 8. At altitudes above 2,000 m, derate the thermal current.

Sizing and coordination

For Type 1 coordination (replace the contactor after a fault), use a 100 A gL/gG fuse. These values govern your branch circuit protection design. The auxiliary contact block has 2 instantaneous contacts (NO/NC configurable).

Frequently asked questions

What is the depth of the 3RT1026-1BG44?

The depth is 150 mm from the mounting surface to the furthest projection (typically the front cover or auxiliary block). This is the total installed depth you need to allow in the enclosure.

MPN
3RT1026-1BG44