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Siemens 3RT5046-1BF40 — Contactors

Siemens 3RT5046-1BF40 SIRIUS S3 Power Contactor, 110 VDC Coi

MPN3RT5046-1BF40

Siemens SIRIUS S3 power contactor, 3RT5046-1BF40, 110 VDC coil, screw-type terminals, snap-on mounting for 35/75 mm DIN rail, frame size S3.

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

3RT5046-1BF40 — Identification
ParameterValue
Contactor frame sizeS3
3RT5046-1BF40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 690 V25.4 kW
Rated value @ 230 V6 A
Rated value @ 24 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT5046-1BF40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT5046-1BF40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT5046-1BF40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fusefuse gL/gG: 160 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT5046-1BF40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (2.5 ... 16 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 and 75 mm standard mounting rail
Side-by-side mountingYes
3RT5046-1BF40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT5046-1BF40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT5046-1BF40 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth152 mm

Product details

It mounts on 35 mm or 75 mm standard DIN rail via screw or snap-on fastening, with ±180° rotation and ±22.5° tilt possible on a vertical surface — useful when panel layout forces an unconventional orientation. Frame size S3 and a 70 mm width mean it occupies two standard 35 mm DIN-rail slots side by side, and side-by-side mounting is explicitly permitted — no derating gap required between units.

Motor power ratings at 60 °C ambient: 38 kW at 230 V, 66 kW at 400 V, and 114 kW at 690 V — these are the numbers that govern real motor sizing, not the lower 25.4 kW at 690 V figure which applies under a different condition. At 40 °C the conductor cross-section minimum is 50 mm²; at 60 °C it drops to 35 mm², reflecting the thermal derating curve. Switching frequency limits: 900 operations/hour under AC-1 resistive load, 850/h under AC-3 motor starting, 250/h under AC-4 plugging/reversing, and 1,000/h for DC loads. The control supply accepts 110 VDC nominal; at that voltage the coil draws 1 A. At 24 VDC it draws 6 A, at 220 VDC 0.3 A, and at 230 VDC 6 A.

Termination and protection

Main and control circuits use screw-type terminals. Main contacts accept 2x (2.5...16 mm²) solid or stranded, or 2x (10...1/0) AWG. The recommended short-circuit protection is a gL/gG fuse rated 160 A — that's the fuse size to coordinate with upstream selectivity. The contactor supports auxiliary switch extension (product extension auxiliary switch: yes), so you can add feedback contacts or status indication without replacing the base unit.

Frequently asked questions

What are the key dimensions for panel layout?

Width is 70 mm (two 35 mm DIN-rail slots), height is 146 mm, depth is 152 mm. Side-by-side mounting is permitted without derating.

What coil voltage does this contactor use?

The coil is rated 110 VDC. At that voltage it draws 1 A during closing and holding, with a steady-state power consumption of 15 W.

What is the recommended short-circuit protection?

A gL/gG fuse rated 160 A is specified for coordination with the contactor's main circuit.

Will the 3RT5046-1BF40 drop into a panel designed for the 3RT1036-1AB00?

The 3RT5046-1BF40 is an S3 frame size, while the 3RT1036-1AB00 is a different frame. Panel cutouts, DIN-rail spacing, and terminal layouts differ — it is not a direct mechanical swap without rewiring and possibly re-drilling the mounting plate.

MPN
3RT5046-1BF40