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Siemens 3RT6028-1BB40 — Contactors

Siemens 3RT6028-1BB40 SIRIUS Power Contactor, 24 VDC Coil, S

MPN3RT6028-1BB40

Siemens SIRIUS power contactor, 3RT6028-1BB40, S0 size, 24 VDC coil, screw terminals, 45 mm wide, AC-3 rated to 690 V.

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

3RT6028-1BB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT6028-1BB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V10 A
Rated value @ 24 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT6028-1BB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT6028-1BB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT6028-1BB40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 100 A
Short-circuit coordination type 2, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 35 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT6028-1BB40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 DIN rail according to DIN EN 50022
Side-by-side mountingYes
3RT6028-1BB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT6028-1BB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT6028-1BB40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

Rated for AC-3 duty up to 690 V, it handles motor switching at 27.5 kW at 400 V and 47.5 kW at 690 V (both at 60 °C ambient), making it suitable for pump, fan, and compressor loads in 400 V and 690 V networks.

The 24 VDC coil draws 6 A at rated voltage — a standard control voltage for PLC-driven panels, but verify your DC supply can support the inrush if multiple contactors pull in simultaneously. The S0 frame size and 45 mm width mean this contactor occupies the same DIN-rail footprint as the earlier 3RT2028 series, so a panel designed around the 3RT2028-1BB40 will accept this part without rewiring or rail repositioning.

RoHS compliance is documented with a substance prohibitance date of 05/01/2012, covering REACH and EU RoHS requirements.

Frequently asked questions

Will 3RT6028-1BB40 drop into a panel designed for 3RT2028-1BB40 without rewiring?

Yes. Both are S0 frame size, 45 mm wide, and mount on 35 mm DIN rail. The footprint and terminal layout are the same, so no rail repositioning or rewiring is needed.

What are the motor power ratings at 60 °C?

At 60 °C ambient, the contactor is rated for 15.5 kW at 230 V, 27.5 kW at 400 V, and 47.5 kW at 690 V under AC-3 duty.

What compliance documentation does Siemens provide for this part?

RoHS and REACH compliance is confirmed with a substance prohibitance date of 05/01/2012. The contactor is designed to meet IEC and UL standards for industrial control equipment.

MPN
3RT6028-1BB40