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Siemens 3RT2448-1AF00 — Contactors

Siemens 3RT2448-1AF00 SIRIUS Contactor, 70 mm, AC Coil

MPN3RT2448-1AF00
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Siemens SIRIUS 3RT2448-1AF00 contactor, size S3, 70 mm width, 152 mm depth, screw-type AC coil terminals, screw and snap-on mounting onto 35 mm DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2448-1AF00 — Identification
ParameterValue
Contactor frame sizeS3
3RT2448-1AF00 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2448-1AF00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.38
Rated value @ 50 Hz110 V
3RT2448-1AF00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2448-1AF00 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 250 A (690 V,100 kA)
Short-circuit coordination type 2, fusegR: 250 A (690 V, 100 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2448-1AF00 — Connection & Mounting
ParameterValue
Main circuit connectionbox terminal
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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
3RT2448-1AF00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2448-1AF00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2448-1AF00 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth152 mm
3RT2448-1AF00 — Specifications
ParameterValue
At AC10 ... 21 ms

Product details

It mounts with screws or snaps onto standard 35 mm DIN rail per DIN EN 60715, and the mounting position is flexible — you can rotate it 180° on a vertical surface or tilt it forward and backward by 22.5° for tight enclosures. The AC coil uses screw-type terminals, and the power circuit accepts stranded conductors from 6 mm² up to 70 mm² — heavy enough for the main feed on a moderate motor branch. The auxiliary side handles solid wire 0.5 to 1.5 mm² or stranded 0.75 to 2.5 mm².

Clearance and fit in the panel

At 70 mm wide, 140 mm tall, and 152 mm deep, this contactor takes up a standard S3 footprint. Side-by-side mounting is allowed, with 10 mm clearance needed at the sides, 10 mm upwards, 20 mm forwards, and 10 mm downwards. That 152 mm depth is the dimension you'll need to account for behind the panel door — it's the deepest number in the envelope.

Switching capacity and ratings

Rated for AC operation, the contactor's main contacts switch 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. At 690 V it's rated at 1 A. Arcing time runs 10 to 20 ms; the magnet coil operates on AC voltage at 50 Hz with a power factor of 0.38. Mechanical life is typical at 10 million operations — that's the contactor itself, not the contacts under load.

Frequently asked questions

Where can I buy the 3RT2448-1AF00 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm number.

What are the key dimensions of the 3RT2448-1AF00?

The contactor measures 70 mm wide, 140 mm high, and 152 mm deep. It requires 10 mm clearance at the sides, 10 mm upwards, 20 mm forwards, and 10 mm downwards for proper ventilation and arc containment.

What wire sizes does the 3RT2448-1AF00 accept?

The power terminals accept stranded conductors from 6 mm² up to 70 mm². The auxiliary terminals accept solid wire 2x (0.5 to 1.5 mm²) or stranded 2x (0.75 to 2.5 mm²).

Will the 3RT2448-1AF00 drop into a panel specified for a 3RT2536-1AF00?

Both are SIRIUS size S3 contactors with the same 70 mm width and DIN-rail mounting, so the footprint and rail position are identical. The main difference is the coil voltage — the 3RT2448-1AF00 uses an AC coil, while the 3RT2536-1AF00 uses a different coil type. Verify coil voltage compatibility before swapping, but the mechanical fit is the same.

MPN
3RT2448-1AF00