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Siemens 3RT6027-1AN20 — Contactors

Siemens 3RT6027-1AN20 SIRIUS Power Contactor, S0, 27.5 kW at

MPN3RT6027-1AN20

Siemens SIRIUS 3RT6027-1AN20, S0 power contactor, 27.5 kW at 400 V 60 °C, AC-3/AC-3e rated 690 V max, screw terminals, 45 mm wide, DIN rail mount.

$390.66Ref. price · indicative, final on quote
Siemens 3RT6027-1AN20 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

3RT6027-1AN20 — Identification
ParameterValue
Contactor frame sizeS0
3RT6027-1AN20 — 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
3RT6027-1AN20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz220 V
3RT6027-1AN20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT6027-1AN20 — 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
3RT6027-1AN20 — 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
3RT6027-1AN20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT6027-1AN20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT6027-1AN20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth97 mm
3RT6027-1AN20 — Specifications
ParameterValue
At AC5 000 1/h

Product details

The Siemens 3RT6027-1AN20 is a SIRIUS S0-frame power contactor rated for AC-3 and AC-3e switching up to 690 V. It delivers 27.5 kW at 400 V and 60 °C, and 47.5 kW at 690 V and 60 °C — these are the motor-load ratings that matter for sizing, not the unloaded thermal current.

The 690 V insulation voltage and AC-3 rated maximum mean this contactor handles 690 V motor circuits without derating.

Side-by-side mounting is supported, meaning no derating for adjacent contactors in a row.

Wiring and auxiliary ratings

Main circuit terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire. The auxiliary contact ratings are: 6 A at 24 V, 1 A at 110 V, 0.3 A at 220 V, 10 A at 230 V, 3 A at 400 V, and 1 A at 690 V — these are the make/break capacities for the control circuit. Maximum switching frequency is 5000 1/h at AC, with lower limits for AC-3 (750 1/h) and AC-4 (250 1/h).

Frequently asked questions

What are the key motor power ratings for the 3RT6027-1AN20?

At 60 °C, it delivers 15.5 kW at 230 V, 27.5 kW at 400 V, and 47.5 kW at 690 V. These are the AC-3 motor-load ratings that determine fit for your motor.

What is the physical size of the 3RT6027-1AN20?

It is 45 mm wide, 85 mm high, and 97 mm deep — the standard S0 frame size that occupies one 45 mm DIN rail slot.

What compliance documentation is available for this contactor?

The part is RoHS compliant with a substance prohibition date of May 1, 2012, and carries the Siemens SIRIUS brand. It is rated for pollution degree 3 per IEC standards. Specific UL/CSA/CE documentation should be available from the manufacturer or distributor upon request.

MPN
3RT6027-1AN20