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Siemens 3RT2028-2AN20 — Contactors

Siemens 3RT2028-2AN20 SIRIUS Power Contactor, S0 Size, Sprin

MPN3RT2028-2AN20
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Siemens SIRIUS 3RT2028-2AN20 power contactor, S0 frame, spring-type terminals, 45 mm wide, 97 mm deep, 102 mm high.

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

Specifications

3RT2028-2AN20 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-2AN20 — 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
3RT2028-2AN20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz220 V
3RT2028-2AN20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-2AN20 — 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)
3RT2028-2AN20 — 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 DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2028-2AN20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-2AN20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-2AN20 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth97 mm
3RT2028-2AN20 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position allows +/-180° rotation on a vertical surface plus +/-22.5° tilt forward and backward — useful when you're squeezing it into a tight panel corner.

Switching duty and frequency

Rated for 1 000 cycles per hour at AC-1 (resistive loads), 750 cycles/hour at AC-2 and AC-3 (slip-ring and squirrel-cage motors), and 250 cycles/hour at AC-4 (plugging/inching). The AC-3e rating also sits at 750 cycles/hour.

The main contact terminals accept solid or stranded wire from 1 to 10 mm²; auxiliary terminals accept 2x (0.5 to 2.5 mm²) solid or stranded. That 6 mm side clearance is tight — if you're packing multiple contactors side-by-side, leave that gap for heat dissipation.

Auxiliary switch is included. Rated currents: 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, 3 A at 400 V, 0.6 A at 440 V. These are the DC ratings for the auxiliary contacts — if you're switching a 24 VDC PLC input, you've got headroom; at 220 VDC the current drops to 0.3 A, so watch the load.

Frequently asked questions

What wire sizes does the 3RT2028-2AN20 accept?

Main contacts accept solid or stranded wire from 1 to 10 mm². Auxiliary contacts accept 2x (0.5 to 2.5 mm²) solid or stranded.

Where can I buy 3RT2028-2AN20?

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

MPN
3RT2028-2AN20