NPN SILICON EPITAXIAL TRANSISTOR (DARLINGTON CONNECTION) FOR LOW-FREQUENCY POWER AMPLIFIERS AND LOW-SPEED SWITCHING

The 2SD1843 is a Darlington connection transistor with on-chip dumper diode in collector to emitter and zener diode in collector to base. This transistor is ideal for use in acuator drives such as motors, relays, and solenoids.
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FEATURES
• High DC current gain due to Darlington connection
• High surge resistance due to on-chip protection elements:
   C to E: Dumper diode
   C to B: Zener diode
• Low collector saturation voltage