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Siemens 3RT2028-2AP04 — Contactors

Siemens 3RT2028-2AP04 SIRIUS Power Contactor, S0, 480V 34A

MPN3RT2028-2AP04
Active

Siemens SIRIUS power contactor, size S0, order code 3RT2028-2AP04, 480 V rated 34 A, spring-type terminals, screw and snap-on DIN rail mounting.

Siemens 3RT2028-2AP04 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2028-2AP04 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-2AP04 — 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 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2028-2AP04 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz230 V
3RT2028-2AP04 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-2AP04 — 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)
3RT2028-2AP04 — 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
3RT2028-2AP04 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-2AP04 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-2AP04 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth144 mm
3RT2028-2AP04 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

The 3RT2028-2AP04 is a SIRIUS power contactor in the S0 frame, sized for 45 mm width, 102 mm height, and 144 mm depth — it occupies a single DIN-rail slot and screws or snaps onto 35 mm rail per DIN EN 60715. Spring-type terminals on the magnet coil and main contacts accept solid or stranded wire from 1 up to 10 mm², with auxiliary terminal pairs handling 2x 0.5 to 2.5 mm².

Duty ratings and switching life

Rated at 34 A on 480 V, this contactor handles motor loads in AC-3 duty up to 750 operations per hour, and resistive loads in AC-1 up to 1,000 ops/h. AC-4 (plugging/reversing) is rated 250 ops/h. Arcing time spans 4 to 16 ms at AC, with a tighter 10 ms band under specific conditions.

Frequently asked questions

Where can I buy 3RT2028-2AP04?

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

What are the key ratings for 3RT2028-2AP04?

Rated 34 A at 480 V, size S0, AC-3 duty 750 ops/h, mechanical life 10 million operations, spring-type terminals for 1-10 mm² wire.

MPN
3RT2028-2AP04