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Siemens 3RT2028-1BF40-0JA0 — Contactors

Siemens 3RT2028-1BF40-0JA0 SIRIUS S0 Power Contactor, 110 V

MPN3RT2028-1BF40-0JA0
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Siemens SIRIUS S0 power contactor, 3RT2028-1BF40-0JA0, 110 V AC coil, screw-type terminals, 45 mm width, 107 mm depth.

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

3RT2028-1BF40-0JA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-1BF40-0JA0 — 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
3RT2028-1BF40-0JA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2028-1BF40-0JA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-1BF40-0JA0 — 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)
3RT2028-1BF40-0JA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2028-1BF40-0JA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-1BF40-0JA0 — Environmental
ParameterValue
Operating temperature range-25 ... +50 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-1BF40-0JA0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

It mounts on 35 mm DIN rail per DIN EN 60715, with ±180° rotation and ±22.5° tilt possible on a vertical surface. Switching frequency reaches 1000 cycles/hour at AC-1 resistive load, 750 cycles/hour at AC-3 motor duty, and 250 cycles/hour at AC-4 inching duty — the AC-3e rating matches the same 750 cycles/hour for standard motor-start applications.

Terminal and mounting details

Main contacts accept 1–10 mm² solid or stranded; auxiliary contacts accept dual conductors 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²). Height is 85 mm.

Auxiliary contact ratings and switching performance

The auxiliary switch is rated for DC switching: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. Arcing time is 10 ms.

Frequently asked questions

How do I get current pricing and availability for 3RT2028-1BF40-0JA0?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at the time of quotation.

What is the closest functional second-source to 3RT2028-1BF40-0JA0?

The 3RT2036-1AC20-ZX95 is a peer SIRIUS contactor but carries different coil voltage and terminal specifications. The 3RT2028-1BF40-0JA0 uses a 110 V coil and screw terminals; verify coil voltage and auxiliary contact count before substituting. The 3RT2526-1BF40 and 3RT2526-1BG40 are also S0-size peers but differ in coil voltage and auxiliary configuration.

What is the depth of 3RT2028-1BF40-0JA0?

The depth is 107 mm. Width is 45 mm, height is 85 mm.

What wire sizes does the main contact accept?

Solid or stranded conductors from 1 to 10 mm². Auxiliary terminals accept dual conductors 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²).

Will 3RT2028-1BF40-0JA0 drop into a panel specified around 3RT2036-1AC20-ZX95 without rewiring?

Both are S0-size contactors with the same mounting footprint on 35 mm DIN rail, so mechanical fit is identical. However, coil voltage and auxiliary contact configuration differ — verify the 110 V coil matches the control circuit and that the auxiliary contact count meets the original specification before substituting.

MPN
3RT2028-1BF40-0JA0