CPH3121/CPH3221 is an NPN type switching transistor, mainly used in relay driver, lamp driver, motor driver and flash. This transistor has the characteristics of high current capacitance, low collector-emitter saturation voltage, high switching speed, ultra-small package, etc., suitable for applications with strict requirements on integration and volume.
The CPH3121 and CPH3221 are PNP/NPN epitaxial planar silicon transistors offered by SANYO. They are intended for use in relay drivers, lamp drivers, motor drivers, and flash circuits, and feature an ultrasmall package with a mounting height of 0.9 mm.
The datasheet provides absolute maximum ratings, electrical characteristics, and package dimensions, including collector current limits, voltage ratings, gain‑bandwidth product, and output capacitance. It also includes safety and export‑control notices for designers integrating these devices into equipment.
| Collector Current (Ic) | 3 A |
|---|---|
| Pulse Collector Current (IcP) | 5 A |
| Collector‑to‑Emitter Voltage (VCEO) | 15 V |
| Base Current (IB) | 600 mA |
They are suitable for relay drivers, lamp drivers, motor drivers, and flash circuits.
The maximum continuous collector current is 3 A, with a pulse rating of 5 A.
The devices are rated for a maximum collector‑to‑emitter voltage of 15 V.