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Siemens 3RT2028-2AH00 — Contactors

Siemens 3RT2028-2AH00 SIRIUS Power Contactor, Size S0, 34 A

MPN3RT2028-2AH00
Active

Siemens SIRIUS power contactor, Size S0, 3RT2028-2AH00, 34 A at 480 V AC-3, spring-type terminals, screw and snap-on DIN-rail mount.

Siemens 3RT2028-2AH00 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

3RT2028-2AH00 — Identification
ParameterValue
Contactor frame sizeS0
3RT2028-2AH00 — 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
3RT2028-2AH00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz48 V
3RT2028-2AH00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2028-2AH00 — 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)
3RT2028-2AH00 — 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
3RT2028-2AH00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2028-2AH00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2028-2AH00 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth97 mm
3RT2028-2AH00 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

SIRIUS Size S0 Power Contactor — 34 A at 480 V AC-3

The Siemens 3RT2028-2AH00 is a SIRIUS-brand power contactor in the Size S0 frame, rated 34 A at 480 V for AC-3 motor switching duty. Maximum switching frequency reaches 750 cycles per hour under AC-3 duty and 1 000 cycles per hour under AC-1 resistive load — enough for high-cycle conveyor or pump start applications, though the AC-4 plugging/inching rate drops to 250 ops/h.

The Size S0 footprint is 45 mm wide, 102 mm tall, 97 mm deep — that 97 mm depth is the dimension to watch when laying out gland plates or enclosure depth behind the DIN rail.

Arcing time is 10 to 10 ms under AC conditions — a tight window that keeps arc energy contained within the contactor housing. The main contact configuration is 18-8 (three normally-open power poles plus one normally-open auxiliary). Coil termination uses spring-type terminals, which eliminates screw-clamp maintenance and speeds wiring in high-density panels.

MPN
3RT2028-2AH00