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Siemens 3RT6027-1BM40 — Contactors

Siemens 3RT6027-1BM40 SIRIUS Power Contactor, 27.5 kW at 400

MPN3RT6027-1BM40

Siemens SIRIUS 3RT6027-1BM40 power contactor, size S0, 45 mm width, 27.5 kW at 400 V AC-3e at 60 °C, screw terminals, DIN rail snap-on mounting.

Siemens 3RT6027-1BM40 datasheet (PDF)
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

3RT6027-1BM40 — Identification
ParameterValue
Contactor frame sizeS0
3RT6027-1BM40 — 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
3RT6027-1BM40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT6027-1BM40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT6027-1BM40 — 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
3RT6027-1BM40 — 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
3RT6027-1BM40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT6027-1BM40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT6027-1BM40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

SIRIUS power contactor, size S0 — 3RT6027-1BM40

The Siemens 3RT6027-1BM40 is a SIRIUS power contactor in the size S0 frame, rated for motor switching up to 27.5 kW at 400 V at 60 °C ambient. The screw-type terminals on both main and auxiliary circuits accept 2x (0.5 to 2.5 mm²) solid or stranded, or AWG 16 to 8 for the main contacts.

The AC-3e maximum switching frequency of 750 cycles per hour governs motor starting duty — this contactor handles frequent starts without overheating, but the AC-4 maximum of 250 1/h applies when plugging or inching. The 27.5 kW at 400 V at 60 °C is the real-world motor power you can switch in a warm cabinet; at 690 V it reaches 47.5 kW. The 10 million mechanical cycles typical life means this contactor outlasts most equipment it controls, making it a strong candidate for a critical spare.

At 45 mm wide and 107 mm deep, this size S0 contactor fits standard 35 mm DIN rail.

Frequently asked questions

What are the motor power ratings for 3RT6027-1BM40 at 60 °C?

At 230 V it is rated 15.5 kW, at 400 V it is 27.5 kW, and at 690 V it is 47.5 kW — all at 60 °C ambient.

Where can I buy 3RT6027-1BM40?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What compliance documentation is available for 3RT6027-1BM40?

The part carries a substance prohibition date of 05/01/2012 for RoHS-like compliance. It is designed for pollution degree 3 and insulation voltage rated 690 V.

MPN
3RT6027-1BM40