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The Siemens 3MT7012-0AA10-0AN2 is a high-performance three-pole power contactor designed for reliable switching and control of AC motors and electrical loads in industrial and commercial applications. It belongs to the Siemens 3MT7 series, which is known for its compact construction, long service life, and dependable performance under demanding operating conditions.
This contactor is rated for AC-3 duty up to 18 A at 400 V, making it suitable for controlling motors with a power rating of up to 7.5 kW at 400 V. It features a robust main contact system engineered to withstand frequent switching operations, ensuring stable and safe operation in motor control circuits such as direct-on-line (DOL) starters. The device also supports AC-1 applications, providing flexibility for resistive and lightly inductive loads.
The control circuit is equipped with a 230 V AC coil (50/60 Hz), designed to deliver consistent pull-in and holding performance across a wide voltage tolerance range. This ensures dependable operation even in environments with minor voltage fluctuations. The contactor incorporates screw-type terminals for secure electrical connections, allowing for straightforward installation, reduced wiring time, and reliable long-term contact integrity.
| Parameter | Specification |
|---|---|
| Product Type | Power Contactor |
| Series | 3MT7 |
| Part Number | 3MT7018-1AA10-0AL2 |
| Number of Poles | 3 Pole |
| Main Contacts | 3 NO (Normally Open) |
| Rated Operational Current | 18 A (AC-3 at 400 V) |
| Rated Thermal Current (Ith) | 32 A (AC-1 at 400 V) |
| Rated Operational Voltage | Up to 400 V AC |
| Motor Power Rating | Up to 7.5 kW at 400 V |
| Control Supply (Coil Voltage) | 230 V AC, 50/60 Hz |
| Auxiliary Contacts | 1 NO |
| Connection Type | Screw Terminals |
| Mounting Type | DIN Rail or Screw Mount |
| Terminal Tightening Torque | Main: approx. 1.7 N·m / Coil & Aux: approx. 1.2 N·m |
| Mechanical Life | Up to 10 million operations |
| Electrical Life (AC-3) | Up to 1 million operations |
| Degree of Protection | IP20 |
| Operating Temperature Range | −5 °C to +55 °C |
| Storage Temperature Range | −25 °C to +70 °C |
| Maximum Installation Altitude | 2000 m |
| Body Material | Flame-retardant engineering plastic |
| Dimensions (H × W × D) | Approx. 74.5 × 45 × 87 mm |
| Weight | Approx. 0.4 kg |
| Standards Compliance | IEC/EN 60947 |