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Siemens 3RT2028-2NB30 — Contactors

Siemens 3RT2028-2NB30 SIRIUS Power Contactor, 24 VDC coil, 1

MPN3RT2028-2NB30
Active

Siemens SIRIUS power contactor, S0 size, 24 VDC coil, 10 A rated, spring-cage terminals, 45 mm wide, DIN-rail snap-on.

Siemens 3RT2028-2NB30 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

3RT2028-2NB30 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-2NB30 — 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
3RT2028-2NB30 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz0.86
Rated value @ 50 Hz21 ... 28 V
3RT2028-2NB30 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-2NB30 — 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)
3RT2028-2NB30 — 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
3RT2028-2NB30 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-2NB30 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-2NB30 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm
3RT2028-2NB30 — Specifications
ParameterValue
At AC30 ... 50 ms

Product details

Siemens 3RT2028-2NB30 SIRIUS Power Contactor

The S0 footprint is 45 mm wide, 102 mm tall, 107 mm deep. This fits standard panel layouts without rework.

Coil and Switching Performance

Coil rated 21–28 VDC, inrush peak 3 A. Arcing time is 10 ms. Mechanical life typical 10 million operations. Switching frequency varies by duty: up to 1,000 cycles/h at AC-1, 750/h at AC-2, AC-3, AC-3e, and 250/h at AC-4. The AC-1 rating (resistive load) is the highest cycle rate; AC-4 (plugging/inching) is the most demanding and halves that rate.

Frequently asked questions

How do I get current pricing and availability for 3RT2028-2NB30?

Submit an RFQ through the storefront. Pricing and stock are confirmed at quote time; no real-time figures are published here.

What is 3RT2028-2NB30's listed depth?

The depth is 107 mm. The overall S0 footprint is 45 mm wide by 102 mm tall.

What solid wire range does the spring-cage terminal accept?

Solid wire from 1 to 10 mm². Stranded wire also accepts 1 to 10 mm². The terminal also accepts two conductors of 0.5 to 2.5 mm² each.

MPN
3RT2028-2NB30