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Siemens 3RT2028-2AP04-ZX95 — Contactors

Siemens SIRIUS 3RT2028-2AP04-ZX95 Power Contactor, 480V 34A

MPN3RT2028-2AP04-ZX95
Active

Siemens SIRIUS, power contactor, 3RT2028-2AP04-ZX95, S0 frame, 480 V AC-3 rated 34 A, spring-type terminals, screw and snap-on mounting onto 35 mm DIN rail.

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

3RT2028-2AP04-ZX95 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-2AP04-ZX95 — 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-ZX95 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz230 V
3RT2028-2AP04-ZX95 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-2AP04-ZX95 — 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-ZX95 — 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 standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2028-2AP04-ZX95 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-2AP04-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-2AP04-ZX95 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth144 mm
3RT2028-2AP04-ZX95 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

Its AC-3 rating at 480 V hits 34 A — that's the motor-duty current it handles across starting and running, not just resistive heating.

The 45 mm width and 102 mm height are standard S0 footprint; depth is 144 mm, so factor that into gland-plate clearance and door swing. Keep 10 mm clearance upwards, downwards, and forwards; 6 mm at the sides. That storage range is for handling and shelf life, not running — the operating limit governs in-panel derating.

Switching rates and auxiliary contacts

No built-in auxiliary switch block on this variant — the order code suffix ZX95 means it ships without one. If you need aux contacts for feedback or interlocks, you add a separate block. Switching frequency maxes at 1 000 cycles/hour for AC-1 resistive loads, 750 for AC-3 motor duty, and 250 for AC-4 (plugging/inching). Coil draws 0.25 A at 50 Hz. Arcing time is 10 ms. The auxiliary contact ratings across DC voltages are listed: 6 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 matter when you're coordinating control-circuit fuse sizing.

Frequently asked questions

What is the closest functional second-source to 3RT2028-2AP04-ZX95?

The 3RT2036-1AC20-ZX95 is a peer in the same SIRIUS S0 family, but it carries a higher AC-3 current rating and uses screw terminals instead of spring-type. Check your BOM's wire termination preference and load current before swapping — the footprint is the same 45 mm width, so panel fit is identical.

Where can I buy 3RT2028-2AP04-ZX95 and how is it quoted?

Sourced through independent industrial-automation distribution. Quoted to order against an RFQ — availability and current pricing confirmed at quote time.

Will 3RT2028-2AP04-ZX95 drop into a panel specified around 3RT2036-1AC20-ZX95 without rewiring?

Yes — both are S0 frame, 45 mm wide, same DIN-rail mounting pattern. The main difference is the terminal type (spring vs screw) and the AC-3 current rating. If your wire lugs are sized for screw terminals, the spring clamp on this part may require re-termination with ferrules.

MPN
3RT2028-2AP04-ZX95