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Siemens 3RT2027-2BM40 — Contactors

Siemens 3RT2027-2BM40 SIRIUS Power Contactor, S0, 45 mm, Spr

MPN3RT2027-2BM40
Active

Siemens SIRIUS power contactor, size S0, 45 mm width, spring-type terminals, screw and snap-on mounting onto 35 mm DIN rail (DIN EN 60715).

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

3RT2027-2BM40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2027-2BM40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V22 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V5 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2027-2BM40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2027-2BM40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2027-2BM40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA)
Short-circuit coordination type 2, fusegG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (415V, 80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2027-2BM40 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2027-2BM40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2027-2BM40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2027-2BM40 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm

Product details

Rated for AC-1 resistive loads at up to 1,000 switching cycles per hour, AC-2 and AC-3 motor duty at 750 cycles/h, and AC-4 (inching/plugging) at 250 cycles/h. The AC-3e rating also holds at 750 cycles/h. For DC switching, the contactor breaks 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V — covering common control voltages in industrial DC bus and battery-backed circuits.

Spring-type terminals accept solid or stranded conductors from 1 to 10 mm², and two conductors of 0.5 to 2.5 mm² each.

Frequently asked questions

Where can I buy 3RT2027-2BM40 and how is it quoted?

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

What are the key ratings for 3RT2027-2BM40?

It is a size S0 power contactor rated for AC-1 at 1,000 cycles/h, AC-3 at 750 cycles/h, and AC-4 at 250 cycles/h. DC breaking capacity reaches 10 A at 24 V, 2 A at 48/60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V.

What is the depth of 3RT2027-2BM40?

The depth is 107 mm.

What solid conductor range does 3RT2027-2BM40 accept?

It accepts solid conductors from 1 to 10 mm².

MPN
3RT2027-2BM40