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Siemens 3RT2028-2XG40-0LA2 — Contactors

Siemens 3RT2028-2XG40-0LA2 SIRIUS Contactor, Size S0, 125 VD

MPN3RT2028-2XG40-0LA2
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Siemens SIRIUS 3RT2028-2XG40-0LA2 contactor, Size S0, 125 VDC coil, spring-type terminals, auxiliary switch included.

Siemens 3RT2028-2XG40-0LA2 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT2028-2XG40-0LA2 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-2XG40-0LA2 — 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
3RT2028-2XG40-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2028-2XG40-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT2028-2XG40-0LA2 — 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)
3RT2028-2XG40-0LA2 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (1 ... 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 standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2028-2XG40-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-2XG40-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-2XG40-0LA2 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm

Product details

SIRIUS 3RT2028-2XG40-0LA2 — DC Coil Contactor, Size S0

Rated for switching loads up to 10 A at 24 VDC, 2 A at 48 VDC and 60 VDC, 1 A at 110 VDC, 0.9 A at 125 VDC, and 0.3 A at 220 VDC.

Dimensions: 45 mm wide, 102 mm high, 107 mm deep — fits standard S0 footprint in a control panel.

Electrical Performance and Environment

DC dropout time is 30 to 50 ms; arcing time is 10 to 10 ms. Switching frequency: 750 operations per hour for AC-1, AC-2, AC-3, and AC-3e duty; 250 per hour for AC-4. Main contacts accept 2x (1 to 10 mm²) solid; auxiliary contacts accept 2x (0.5 to 2.5 mm²) solid or stranded. Initial pickup factor is 0.7; full-scale value is 1.25.

Frequently asked questions

What are the key ratings for this contactor?

Key ratings: 125 VDC coil, 10 A at 24 VDC, 2 A at 48/60 VDC, 1 A at 110 VDC, 0.9 A at 125 VDC, 0.3 A at 220 VDC, 5 hp at 230 VAC, 3 A at 400 VAC. Mechanical life is 10,000,000 cycles.

Does this contactor include an auxiliary switch?

Yes, an auxiliary switch is included as standard.

What type of coil terminals does it have?

The magnet coil uses spring-type terminals for fast wiring.

MPN
3RT2028-2XG40-0LA2