3RT2024-1AH20

Siemens 3RT2024-1AH20 AC contactor, 48V AC coil, 12A
Siemens 3RT2024-1AH20 AC contactor, 48V AC coil, 12A

48V AC low-voltage coil, suitable for use in control circuits with safety isolation transformers, 3-pole 12A/5.5kW load capacity, built-in one set of normally open and normally closed auxiliary contacts, screw terminals.

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Siemens 3RT2024-1AH20 AC contactor, 48V AC coil, 12A
Product Positioning

The 3RT2024-1AH20 is a Siemens SIRIUS 3RT2 series S0 frame contactor with a coil voltage of 48V AC (50/60Hz). It is commonly used in low-voltage control circuits with safety isolation transformer outputs to reduce the risk of electric shock to operators when they come into contact with the control circuit. The main circuit specifications are consistent with other parts in the same series: 3-pole, AC-3 rated 12A/5.5kW (400V), and includes one set of NO+1 NC auxiliary contacts for interlocking and signal feedback. The screw terminal design facilitates wiring, maintenance, and replacement.

Core Product Advantages and Features
48V low-voltage coil design
The coil voltage is 48V AC, which can be directly connected to the secondary side of the safety isolation transformer, reducing the safety risks of on-site wiring and operation.
50/60Hz Dual-Band Universal
The same coil specification can operate normally in a 50Hz or 60Hz power supply environment, and is not limited by the regional power frequency.
Built-in auxiliary contacts
It is equipped with one set of normally open and one set of normally closed instantaneous auxiliary contacts as standard to meet basic interlocking and operation indication requirements.
S0 chassis offers excellent interchangeability.
It shares the same appearance and installation method as other models in the 3RT2024 series, making it convenient for parts preparation and quick replacement and repair.
project Specification
Coil voltage/frequency 48V AC, 50/60Hz
Auxiliary contact configuration 1 NO + 1 NC (Instantaneous Action)
Applicable occasions Low voltage control circuit, secondary side of safety isolation transformer
Applicable motor circuit current (AC-3, 400V) 12 A
Rated operating power (AC-3, 400V) 5.5 kW
Number of poles/frame 3-pole (3P) / S0
Dimensions of the outer casing (width × height × depth) 45 × 85 × 97 mm
Terminal type Screw terminals
Rated insulation voltage Ui 690 V
Rated impulse withstand voltage Uimp 6 kV
Protection level IP20 (Front Side and Terminals)
Mechanical life Approximately 10 million times (typical)
Ambient temperature -25°C ~ +60°C
Acceptable conductor wire diameters (main/auxiliary circuits) 1~10 mm² / 0.5~2.5 mm²

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