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Siemens 3RT2028-1BB44-ZX95 — Contactors

Siemens 3RT2028-1BB44-ZX95 SIRIUS S0 Power Contactor, 24 VDC

MPN3RT2028-1BB44-ZX95
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Siemens SIRIUS S0 power contactor, 3RT2028-1BB44-ZX95, 24 VDC coil, screw-type terminals, 3-pole main contacts, 45 mm width, DIN rail snap-on mounting.

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

3RT2028-1BB44-ZX95 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-1BB44-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
3RT2028-1BB44-ZX95 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2028-1BB44-ZX95 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-1BB44-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)
3RT2028-1BB44-ZX95 — 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
3RT2028-1BB44-ZX95 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-1BB44-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-1BB44-ZX95 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth151 mm

Product details

It carries a 24 VDC coil with an operating range of 0.8 to 1.1 times rated value, so the coil holds in at about 19.2 V and picks reliably at 26.4 V. The screw-type coil terminals match standard panel wiring practice.

Duty ratings and switching frequency

This contactor is rated for AC-3 motor duty at 750 operations per hour, and AC-4 inching/jogging at 250 ops/h. AC-1 resistive loads can run at 1000 ops/h. The mechanical endurance is 10 million operations, so the contactor outlasts the coil or arc chamber in most cycling applications. For DC switching, the contactor is rated at 6 A at 24 V, 2 A at 48 V, and 0.3 A at 220 V — these are resistive-load figures; inductive DC loads require derating or arc suppression.

The S0 frame measures 85 mm high, 45 mm wide, and 151 mm deep.

The coil terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded.

Frequently asked questions

Where can I buy 3RT2028-1BB44-ZX95 and get a price?

It is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability.

What is the depth of 3RT2028-1BB44-ZX95?

The depth is 151 mm on the S0 frame.

What wire sizes does the 3RT2028-1BB44-ZX95 accept?

Main contacts accept solid or stranded wire from 1 to 10 mm². Coil terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²).

What coil voltage does this contactor use?

It uses a 24 VDC coil with an operating range of 0.8 to 1.1 times rated value (19.2 to 26.4 V).

MPN
3RT2028-1BB44-ZX95