SIEMENS MOTOR PROTECTION CIRCUIT BREAKER - 3TW42901AB78-12.5A..............20A-415V-7.5KW-3P-D.O.L STARTER

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SIEMENS 3TW42901AB78 Motor Protection Circuit Breaker

12.5A–20A | 7.5kW | 415V | 3-Pole | D.O.L Starter

The SIEMENS 3TW42901AB78 is a high-capacity motor protection circuit breaker designed for motors up to 7.5kW. Optimized for Direct-On-Line (D.O.L) starter applications, it offers reliable protection against overload and short circuits in 415V 3-phase systems.


Key Features

  • Adjustable current range: 12.5A to 20A

  • Supports motor power up to 7.5kW

  • Rated operating voltage: 415V AC

  • 3-pole design ensures full-phase protection

  • Ideal for D.O.L (Direct-On-Line) starter circuits

  • Built-in overload and short-circuit protection

  • Compact, durable construction for panel mounting

  • Fully compliant with IEC safety and quality standards

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