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Siemens 3RT2025-1DB40 — Contactors

Siemens 3RT2025-1DB40 SIRIUS Power Contactor, 24 VDC Coil, S

MPN3RT2025-1DB40
Active

Siemens SIRIUS power contactor, 3RT2025-1DB40, S0 frame size, 24 VDC coil, screw-type terminals, 6 A at 24 VDC, screw and snap-on mounting onto 35 mm DIN rail.

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

3RT2025-1DB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2025-1DB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V3 hp
Rated value @ 24 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2025-1DB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2025-1DB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2025-1DB40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)
Short-circuit coordination type 2, fusegG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2025-1DB40 — 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
3RT2025-1DB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2025-1DB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2025-1DB40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

The coil is rated 24 VDC, pulling 6 A at rated voltage — that's the DC-13 switching capacity for the auxiliary contacts, not the main contact rating. For motor duty, the AC-3 switching frequency is rated at 1,000 operations per hour, meaning it handles frequent start/stop cycles on conveyors or pumps without overheating the coil or arc chamber.

The 24 VDC coil draws 6 A at rated value — that's the inrush and holding current combined. If you're feeding it from a 24 VDC power supply, factor that into the supply budget; it's not a low-power PLC output coil. For the auxiliary contact wiring, it accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded. The S0 frame size gives a width of 45 mm, height of 85 mm, and depth of 107 mm. The 107 mm depth is the key dimension for enclosure depth — verify your panel can clear that plus wiring space behind the door. That's tighter than some contactors — you can pack them closer on the rail.

The screw terminals are front-accessible, so wiring is straightforward even in a dense panel. The contactor includes an auxiliary switch (built-in), so you don't need a separate add-on block for feedback to the PLC or status indication. That saves one DIN-rail slot and one wiring step.

Frequently asked questions

What is the depth of the 3RT2025-1DB40?

The depth is 107 mm. This is the dimension from the DIN-rail mounting surface to the front of the contactor, not including wiring protrusion.

What wire sizes does the 3RT2025-1DB40 accept?

Main terminals accept solid or stranded wire from 1 to 10 mm². Auxiliary terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded. All terminals are screw-type.

Will the 3RT2025-1DB40 drop into a panel designed for the 3RT2024-2BB40?

Both are S0 frame size with 45 mm width, so the physical footprint and DIN-rail mounting are identical. However, verify the auxiliary contact configuration — the suffix difference (-1DB40 vs -2BB40) indicates a different contact arrangement. The coil voltage is the same at 24 VDC, so no rewiring of the coil circuit is needed, but the auxiliary wiring may differ.

MPN
3RT2025-1DB40