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Siemens 3RT2028-4AG60 — Contactors

Siemens 3RT2028-4AG60 SIRIUS Power Contactor, 480 V AC-3 34

MPN3RT2028-4AG60

Siemens SIRIUS power contactor, Size S0, 3RT2028-4AG60, 480 V AC-3 rated 34 A, 100 V 50 Hz / 110 V 60 Hz coil, screw and snap-on 35 mm DIN rail.

Siemens 3RT2028-4AG60 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2028-4AG60 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-4AG60 — 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
3RT2028-4AG60 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz100 V
3RT2028-4AG60 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-4AG60 — 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)
3RT2028-4AG60 — Connection & Mounting
ParameterValue
Main circuit connectionRing cable lug connection
Aux. / control circuit connectionring terminal lug connection
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2028-4AG60 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-4AG60 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-4AG60 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth97 mm
3RT2028-4AG60 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

Siemens SIRIUS 3RT2028-4AG60 — Power Contactor, Size S0

The Siemens 3RT2028-4AG60 is a SIRIUS power contactor in the Size S0 frame, rated for motor switching in AC-3 duty up to 34 A at 480 V.

The 34 A at 480 V AC-3 rating is the motor-switching current — the contactor is sized for a 3-phase motor drawing that full-load current. The 5 hp at 230 V gives a quick reference for smaller motors. Auxiliary contact ratings are listed per voltage: 10 A at 24 V, 2 A at 48 V, 1 A at 110 V, 0.3 A at 230 V, and 3 A at 400 V — these govern the signal-side load, not the main power path. The mechanical life is 10 million operations typical; switching frequency limits vary by duty: up to 1000 cycles/hour at AC-1, 750 at AC-2/AC-3/AC-3e, and 250 at AC-4.

The magnet coil connection uses ring cable lugs.

Frequently asked questions

What is 3RT2028-4AG60's listed depth (97 mm) on this component line?

The depth is 97 mm, with a width of 45 mm and height of 85 mm.

What is 3RT2028-4AG60's listed width (45 mm) on this component line?

The width is 45 mm, matching the standard Size S0 contactor width.

MPN
3RT2028-4AG60