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- Siemens 42BF35AG
  
  Class 42 Definite Purpose Contactor (Not a Circuit Breaker)
  
  Manufacturer: Siemens
  
  Part No: 42BF35AG
  
  Type: Non‑reversing definite purpose contactor (3‑pole, open frame)
  
  Basic Description
  
  Series: Class 42 DP (Definite Purpose) Contactor
  
  Poles: 3 main poles (3PST‑NO)
  
  Coil Voltage: 208–240 VAC, 50/60 Hz
  
  Full Load Amps (FLA): 30 A (inductive); 40 A (resistive)
  
  Motor Rating: 7.5 hp @ 240 V; 10 hp @ 480/575 V (3‑phase)
  
  Aux Contacts: 4NO + 4NC (10 A @ 600 VAC, A600)
  
  Enclosure: Open‑type (no cover)
  
  Mounting: Surface/chassis mount
  
  Specifications
  
  Max Voltage: 600 VAC
  
  Coil Voltage: 208–240 VAC (60 Hz); 190–220 VAC (50 Hz)
  
  Weight: 1.04 lb (0.47 kg)
  
  Dimensions (H×W×D): 3.69 × 2.38 × 2.87 in (93.7 × 60.5 × 72.9 mm)
  
  Terminals: Screw‑type (torque: 20 lb.in for main, 40 lb.in for lugs)
  
  Certifications: UL, CSA, CE, cRUus
  
  Operating Temp: Up to 70 °C (158 °F)
  
  Key Features
  
  Compact Open Frame: Space‑saving, easy wiring and maintenance
  
  High Contact Rating: 30 A inductive / 40 A resistive for general purpose
  
  Versatile Aux Contacts: 4NO+4NC for control/interlock circuits
  
  Industrial Grade: Designed for HVAC, refrigeration, pumps, and machine tools
  
  Long Life: Suitable for frequent switching (AC‑3 duty)
  
  Applications
  
  HVAC & Refrigeration: Compressors, fans, pumps
  
  Industrial Machinery: Motors, heaters, conveyors
  
  Commercial Equipment: Ovens, chillers, lift systems
  
  Panel & Switchgear: Motor control centers (MCCs)