C5103 (2SC5103)

The C5103, also listed as 2SC5103, is a high-speed NPN switching transistor designed for use in driver stages and general power-switching applications. It supports a collector-emitter breakdown voltage of 60 V and a continuous collector current of 5 A, making it suitable for motor drivers, switching power supplies, audio power stages, and other medium-power electronic circuits. Its low collector-emitter saturation voltage contributes to reduced conduction losses and stable operation in high-frequency switching environments.

The device offers consistent switching behavior with a typical fall time of 0.1 μs and a transition frequency of approximately 120 MHz. These characteristics support use in circuits that require fast transitions and predictable timing. The transistor’s performance parameters also provide adequate headroom for amplification tasks and waveform shaping in communication and control systems. Mechanical and thermal ratings allow integration in compact layouts, and the available package footprint (CPT3 / SC-63) aligns with standard PCB configurations.

The C5103 is suitable for equipment where defined switching characteristics, stable gain, and controlled thermal response are required. It is commonly used in automation hardware, power conversion modules, telecom circuitry, and driver interfaces. For complete electrical ratings, mechanical drawings, and application notes, refer to the official ROHM datasheet.

Key Specifications