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ULN 2803 is a high-voltage, high-current Darlington transistor array. The device consists of eight npn Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of each Darlington pair is 500 mA. The Darlington pairs may be connected in parallel for higher current capability. Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers.
2SA1941 bipolar transistor p-n-p type transistor. Collector-Emitter Voltage: -140 V Collector-Base Voltage: -140 V Emitter-Base Voltage: -5 V Collector Current: -10 A Collector Dissipation – 100 W DC Current Gain (hfe) – 55 to 160 Transition Frequency – 30 MHz Operating and Storage Junction Temperature Range -55 to +150 ?C
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