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Siemens 3RT2046-1SB30 — Contactors

Siemens 3RT2046-1SB30 SIRIUS Power Contactor, S3, 21-33V Coi

MPN3RT2046-1SB30
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Siemens SIRIUS, power contactor, size S3, 3RT2046-1SB30, coil rated 21-33 V AC/DC, screw-type terminals, MTBF 52 a.

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

3RT2046-1SB30 — Identification
ParameterValue
Contactor frame sizeS3
3RT2046-1SB30 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V80 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V20 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2046-1SB30 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz2.4 VA
Rated value @ 50 Hz21 ... 33 V
3RT2046-1SB30 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2046-1SB30 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)
Short-circuit coordination type 2, fusegG: 160 A (690 V, 100 kA), aM: 100 A (690 V, 100 kA), BS88: 125 A (415 V, 80 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2046-1SB30 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2.5 ... 16 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
3RT2046-1SB30 — Durability
ParameterValue
Durability (operating cycles, typ.)5 000 000
Durability with aux. switch block (cycles, typ.)5 000 000
3RT2046-1SB30 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2046-1SB30 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth152 mm
3RT2046-1SB30 — Specifications
ParameterValue
At AC38 ... 57 ms

Product details

It mounts via screw fixing or snaps onto a 35 mm DIN rail per DIN EN 60715, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward/backward — useful when you're squeezing it into a crowded enclosure and need to orient the coil terminals toward the gland plate. The coil accepts 21–33 V AC or DC (rated value), with a pickup threshold of 0.8× rated and a full-scale dropout of 1.1× rated — so on a nominal 24 VDC control supply it pulls in cleanly at about 17 V and drops out reliably if the supply sags below 26 V. Inrush current peaks at 2.2 A, steady-state draw is 2.4 VA at both 50 and 60 Hz. The magnet coil uses screw-type terminals, same as the main and auxiliary contacts. Main contact wiring accepts solid conductors from 2.5 to 16 mm² or stranded from 6 to 70 mm² — that covers everything from a 4 mm² motor feed up to a 50 mm² supply cable without needing adaptor lugs. Auxiliary contact wiring takes 2×(0.5–1.5 mm²) solid or 2×(0.75–2.5 mm²) stranded.

Switching frequency and duty-cycle limits

This contactor is rated for different maximum switching rates depending on the utilisation category: 900 operations per hour in AC-1 (resistive), 850 in AC-3 (squirrel-cage motor starting), 350 in AC-2 (slip-ring motor), and 250 in AC-4 (plugging/inching). The AC-3e rating matches the AC-3 figure at 850 ops/h. Arcing time sits between 10 and 20 ms, and the make/break times (AC and DC) are both 38–57 ms — consistent, predictable switching for sequenced starter groups. Mechanical endurance is listed at 5 million operations typical.

The listed MTBF of 52 years (456,000 hours) is a calculated reliability figure under continuous rated load at 40 °C ambient — useful for a reliability-engineering review but not a warranty or guaranteed service life. It tells you the design target for random-failure rate is low enough that the contactor is unlikely to be the weakest link in a motor starter assembly.

Panel integration and clearances

Dimensions: 70 mm wide, 140 mm high, 152 mm deep. That 152 mm depth is the body alone — factor in the screw-terminal projection and the coil-terminal screws when you're laying out the DIN-rail spacing against the enclosure back wall.

Frequently asked questions

What are the main conductor cross-section ranges?

Solid conductors: 2.5 to 16 mm². Stranded conductors: 6 to 70 mm². Auxiliary contacts accept 2×(0.5–1.5 mm²) solid or 2×(0.75–2.5 mm²) stranded.

What compliance documentation is available?

The product is a Siemens SIRIUS contactor carrying CE marking for the European market. Specific RoHS, REACH, and UL documentation is provided by Siemens on request through the standard documentation portal.

MPN
3RT2046-1SB30