CNCHIPDEPOT Original Part
BUF420A
BUF420A NPN power BJT with 450V VCEO, 30A collector current, 200W power and TO-3PN package.
Transistor PolarityNPN
Collector-Emitter Voltage (VCEO)450 V
Collector Current (IC)30 A
DC Current Gain (hFE)50
Power Dissipation (PD)200 W
PackageTO-3PN
Product Overview
The BUF420A is an NPN bipolar power transistor designed for high-voltage, high-current switching and power amplification applications. It features a 450V collector-emitter voltage rating, 30A maximum collector current, and up to 200W power dissipation. Its combination of high voltage capability, high current handling, and relatively low saturation voltage makes it suitable for demanding power-conversion and load-control stages.
Packaged in a TO-3PN through-hole package, the BUF420A is suited to heatsink-mounted designs requiring substantial thermal performance. Its 20MHz transition frequency also supports medium-speed power switching and amplifier applications in high-power electronic systems.
Specifications
Key electrical, package, and sourcing parameters for quick engineering review.
| Part Number | BUF420A |
| Brand | CNCHIPDEPOT |
| Package | TO-3PN |
| Product Type | BJT |
| Transistor Polarity | NPN |
| Collector-Emitter Voltage (VCEO) | 450 V |
| Collector Current (IC) | 30 A |
| DC Current Gain (hFE) | 50 |
| Power Dissipation (PD) | 200 W |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.8 V |
| Transition Frequency (fT) | 20 MHz |
| Emitter-Base Voltage (VEBO) | 7 V |
| Collector Cutoff Current | 10 µA |
| Mounting Type | Through Hole |
Cross Reference & Replacement Information
The following part numbers are commonly reviewed for replacement or compatibility matching. Always verify datasheet, package, pinout, and operating conditions before bulk purchase.
| Target Brand | Target MPN | Replace Type | Notes |
|---|---|---|---|
| Contact us for replacement options | |||
Datasheet
Download the datasheet or contact us for additional technical information.
PDF
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Typical Applications
- High-voltage power switching circuits
- High-current load control stages
- Power converter and inverter circuits
- Motor and actuator driver stages
- High-power amplifier circuits
- Heatsink-mounted power control designs
Ordering & RFQ Information
- MOQ: Contact sales
- Lead Time: 3–7 working days for stock items
- Packaging: Reel / Tube / Tray depending on package
- Sample Availability: Available on request
- Mass Production Status: 50K+ pcs Stock / Mass Production
FAQ
Can this part replace my current model?
It may be suitable depending on your circuit requirements. Please verify datasheet, package, pinout, and test samples before bulk orders.
Can I request samples?
Yes. Please submit your RFQ with target quantity and application details.
Need this part or a compatible replacement?
Send us your target part number, BOM list, quantity, and technical requirements. CNCHIPDEPOT can help review replacement options and provide RFQ support.
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SMT Assembly Workshop
SMT production and assembly capabilities supporting electronic component and PCB-related manufacturing requirements.
Semiconductor Production
Controlled production environments supporting semiconductor and electronic component manufacturing processes.
Component Testing Equipment
Electrical testing and verification equipment used to support performance checks and product consistency.
Quality Inspection Lab
Quality inspection processes help verify component condition, specifications and production consistency before shipment.