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Siemens 3RT2028-2AL24-3MA0 — Contactors

Siemens 3RT2028-2AL24-3MA0 SIRIUS Power Contactor, Size S0,

MPN3RT2028-2AL24-3MA0
Active

Siemens SIRIUS power contactor, size S0, order code 3RT2028-2AL24-3MA0, 45 mm width, spring-type coil terminals, rated 5 hp at 230 V.

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

Specifications

3RT2028-2AL24-3MA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-2AL24-3MA0 — 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
3RT2028-2AL24-3MA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz230 V
3RT2028-2AL24-3MA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-2AL24-3MA0 — 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)
3RT2028-2AL24-3MA0 — 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
3RT2028-2AL24-3MA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-2AL24-3MA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-2AL24-3MA0 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth144 mm
3RT2028-2AL24-3MA0 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

The coil connection uses spring-type terminals — no screwdriver needed for the coil wiring, which speeds panel assembly and avoids loosening from vibration. Rated 5 hp at 230 V, this contactor handles typical three-phase motor starting duty.

Clearance and Wiring

The main contacts accept solid or stranded wire from 1 to 10 mm² (18 to 8 AWG), and the terminals can take two conductors of 0.5 to 2.5 mm² each. Depth is 144 mm, height 102 mm — the Size S0 footprint fits standard 45 mm-wide DIN-rail slots. The arcing time is 10 ms, and the AC coil draws 0.25 A at 50 Hz or 0.28 A at 60 Hz at rated voltage.

The contactor carries no integrated auxiliary switch — if you need aux contacts for feedback or interlocking, they must be added separately.

Frequently asked questions

Where can I buy 3RT2028-2AL24-3MA0?

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

What are the key ratings of 3RT2028-2AL24-3MA0?

It is a Size S0 power contactor rated 5 hp at 230 V, with a mechanical life of 10 million operations, AC-3 switching frequency up to 750 ops/h, and spring-type coil terminals.

Will 3RT2028-2AL24-3MA0 fit in a panel designed for 3RT2015-2AP01?

Both are Size S0 contactors with the same 45 mm width and DIN-rail mounting, so the physical footprint is identical. The main difference is the coil termination — 3RT2028-2AL24-3MA0 uses spring-type terminals on the coil, while the peer uses screw terminals. Wiring method aside, it drops into the same panel slot without drilling or adapter plates.

MPN
3RT2028-2AL24-3MA0