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Siemens 3RT6027-1AL20 — Contactors

Siemens 3RT6027-1AL20 SIRIUS Contactor, S0, 27.5 kW at 400 V

MPN3RT6027-1AL20

Siemens SIRIUS power contactor, S0 size, 3RT6027-1AL20, 27.5 kW at 400 V 60°C, AC-3 690 V max, screw terminals, snap-on DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT6027-1AL20 — Identification
ParameterValue
Contactor frame sizeS0
3RT6027-1AL20 — 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
3RT6027-1AL20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz230 V
3RT6027-1AL20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT6027-1AL20 — 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
3RT6027-1AL20 — 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
3RT6027-1AL20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT6027-1AL20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT6027-1AL20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth97 mm
3RT6027-1AL20 — Specifications
ParameterValue
At AC5 000 1/h

Product details

Motor Duty & Thermal Capacity

The 3RT6027-1AL20: Rated motor power at 60 °C: 15.5 kW at 230 V, 27.5 kW at 400 V, 47.5 kW at 690 V. These are the derated figures for continuous operation at elevated panel temperature — the real-world selection point for a panel OEM. Pollution degree 3 suits industrial environments with conductive contamination.

Side-by-side mounting permitted. Accepts 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²) solid or stranded wire per terminal.

Switching Frequency & Coil Data

Maximum mechanical switching rate: 5 000 operations per hour at AC; AC-1 max 1 000 1/h, AC-3/AC-3e max 750 1/h, AC-4 max 250 1/h. Typical mechanical life: 10 000 000 operations. Coil consumption at 50 Hz is 0.25 A, at 60 Hz 0.28 A. Rated coil voltages and corresponding currents: 24 V (6 A), 110 V (1 A), 220 V (0.3 A), 230 V (10 A), 400 V (3 A), 690 V (1 A).

Frequently asked questions

What is the depth of 3RT6027-1AL20?

97 mm.

Will 3RT6027-1AL20 drop into a panel specified for 3RT6027-1AC20?

Both are S0-frame contactors with the same screw-and-snap-on DIN rail mounting, so the mechanical footprint is identical. Verify coil voltage and auxiliary contact configuration before substituting.

MPN
3RT6027-1AL20