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The Siemens 3MH7901-0CT10 is a compact, front-mountable auxiliary contact block designed to extend the functionality of 3MT7 power contactors and 3MH7 contactor relays. It provides one normally-closed (NC) auxiliary contact that enables additional control and signaling functions in electrical control circuits. With robust mechanical endurance and versatile electrical ratings, this auxiliary switch is ideal for use in automation panels and industrial control systems where reliable auxiliary feedback is needed
Article Number: 3MH7901-0CT10
Product Type: Auxiliary switch, front-mounted
Compatible Devices: 3MT7 power contactors and 3MH7 contactor relays
Auxiliary Contacts: 1 normally closed (NC)
Rated Insulation Voltage: 690 V AC
Rated Impulse Withstand Voltage: 6 kV
Protection Class (Front): IP20
Mechanical Service Life: 10,000,000 switching cycles
Electrical Service Life (AC-15, 230 V): 100,000 switching cycles
Utilization Category AC-12: 10 A at 24 / 230 V
Utilization Category AC-15: 6 A at 24 / 230 V; 3 A at 400 V; 1 A at 690 V
Utilization Category DC-12: 6 A at 24 V; 3 A at 110 V; 1 A at 220 V
Utilization Category DC-13: 6 A at 24 V; 1 A at 110 V; 0.3 A at 220 V; 0.1 A at 600 V
Mounting Type: Front mounting, snap-on
Connection Method: Screw terminals
Connectable Conductor Size: Solid or stranded, up to 1 × 4 mm⊃2; or 2 × 4 mm⊃2;
Operating Temperature: −5 °C to +55 °C
Storage Temperature: −25 °C to +70 °C
Dimensions (H × W × D): 47 × 23.5 × 41.5 mm
Net Weight: Approximately 0.028 kg
Compliance: CE, IEC standards