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Siemens 3RT2028-1FB40 — Contactors

Siemens 3RT2028-1FB40 SIRIUS Power Contactor, Size S0, 24 VD

MPN3RT2028-1FB40
Active

Siemens SIRIUS power contactor, Size S0, 24 VDC coil, screw-type terminals, 45 mm wide, 85 mm high, 107 mm deep, 10 A at 24 V, DIN rail mount.

$97.79Ref. price · indicative, final on quote
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

3RT2028-1FB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-1FB40 — 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
3RT2028-1FB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2028-1FB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-1FB40 — 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)
3RT2028-1FB40 — 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
3RT2028-1FB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-1FB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-1FB40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

SIRIUS 3RT2028-1FB40 Power Contactor — Size S0, 24 VDC Coil

The 45 mm width and 85 mm height fit standard S0 contactor footprints; depth is 107 mm.

For AC-1 resistive loads, it handles up to 1,000 cycles per hour. DC switching capacity is specified per voltage: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V. At 400 V AC it switches 3 A. Arcing time is 10 ms, and DC dropout time is 15 to 18 ms. The coil hold-in power factor is 0.8 at rated voltage.

Mounting and Wiring Clearances

Main contact wire range accepts solid or stranded conductors from 1 to 10 mm²; auxiliary contacts accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²).

Frequently asked questions

What are the key switching ratings for 3RT2028-1FB40?

The contactor switches 10 A at 24 V DC, 2 A at 48/60 V DC, and 3 A at 400 V AC. AC-3 motor duty is rated at 750 operations per hour maximum.

What is the physical size of 3RT2028-1FB40?

It is a Size S0 contactor, 45 mm wide, 85 mm high, and 107 mm deep.

How do I get current pricing and availability for 3RT2028-1FB40?

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

MPN
3RT2028-1FB40