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Siemens 3RT2024-1AH20 — Contactors

Siemens 3RT2024-1AH20 SIRIUS Power Contactor, S0 Size, 24 VD

MPN3RT2024-1AH20
Active

Siemens SIRIUS power contactor, size S0, 3RT2024-1AH20, 24 VDC coil, screw-type terminals, 10 A rated current at 24 V, 3 A at 400 V.

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

3RT2024-1AH20 — Identification
ParameterValue
Contactor frame sizeS0
3RT2024-1AH20 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V12.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V2 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2024-1AH20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz48 V
3RT2024-1AH20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2024-1AH20 — 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)
3RT2024-1AH20 — 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
3RT2024-1AH20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2024-1AH20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2024-1AH20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth97 mm
3RT2024-1AH20 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

Product Identification and Key Ratings

Per the datasheet, the contactor is rated for a mechanical service life of 10,000,000 operating cycles, and its main contacts accept solid or stranded conductors from 1 to 10 mm². The headline switching capacity is defined by the rated operational currents: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, and 0.6 A at 440 V. For motor loads at 230 V, it is rated for 2 hp. These values define the contactor's capability across common control and distribution voltages — the 400 V rating of 3 A, for example, confirms it can switch a small three-phase motor or a resistive heater bank at that voltage level. The contactor supports a maximum switching frequency of 1,000 operating cycles per hour under AC-1, AC-2, AC-3, and AC-3e duty, and 300 cycles per hour under AC-4 duty. The arcing time is specified as 10 ms at AC. These figures matter for applications with frequent start/stop cycles — AC-4 duty (plugging or inching) is the most demanding, and the lower 300 cycles/h limit reflects the increased contact wear under those conditions.

Its dimensions are 85 mm height, 45 mm width, and 97 mm depth — the S0 frame size fits into the common panel layout alongside other S0 components. These clearances must be maintained inside the panel to avoid thermal derating or arc flash to adjacent components. The auxiliary contact terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded conductors. The coil terminal type is screw-type, consistent with the main terminals.

Frequently asked questions

What are the key ratings for this contactor?

The contactor is rated for 10 A at 24 V, 3 A at 400 V, and 2 hp at 230 V for motor loads. The maximum switching frequency is 1,000 cycles/h under AC-3 duty and 300 cycles/h under AC-4 duty. Mechanical service life is 10,000,000 cycles.

What mounting and clearance requirements apply?

The contactor mounts on a 35 mm DIN rail per DIN EN 60715. Required clearances: 10 mm upwards, 10 mm downwards, 10 mm forwards, and 6 mm at the side. Dimensions are 85 x 45 x 97 mm (H x W x D).

What compliance documentation is available for this part?

The manufacturer provides RoHS, REACH, UL, and IEC compliance documentation. These are available upon request as part of the standard technical documentation package.

MPN
3RT2024-1AH20