The BUF420A is a STMicroelectronics High Voltage Fast-Switching NPN Power Transistor. It features high voltage capacity, very high switching speed, minimum lot-to-lot spread for reliable operation and low base-drive requirements. The BUF series is designed for use in high-frequency power supplies and motor control applications.
The BUF420A is a high‑voltage, fast‑switching NPN power transistor built with multi‑epitaxial planar technology. It is intended for use in high‑frequency switch‑mode power supplies and motor‑control applications.
The document lists absolute maximum ratings such as a 1000 V collector‑emitter voltage and 30 A continuous collector current, thermal resistance of 0.63 °C·W, and mechanical dimensions for the TO‑218 (SOT‑93) package.
| Collector‑Emitter Voltage (VCEO) (secondary rating) | 450 V |
|---|---|
| Emitter‑Base Voltage (VEB) | 7 V |
| Collector Current (Ic) | 30 A |
| Total Power Dissipation (Ptot) | 200 W |
| Thermal Resistance Junction‑Case (RθJC) | 0.63 °C·W |
| Package | TO‑218 (SOT‑93) |
The device can handle up to 30 A of collector current.
The junction‑to‑case thermal resistance is 0.63 °C·W.
It is supplied in a TO‑218 (SOT‑93) package.