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BUF420M The BUF420M is a high voltage fast-switching NPN power transistor from STMicroelectronics, rated at 450V VCEO and 30A collector current, in a TO-3 package.
Mfr Part #:

BUF420M

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The BUF420M is a high voltage fast-switching NPN power transistor from STMicroelectronics, rated at 450V VCEO and 30A collector current, in a TO-3 package.
✓ Total Stock: 3,600 pcs
$ Price Range: $7.61

BUF420M Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
3,600 pcs
On Request
3600 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

BUF420M Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Junction Temperature
Mounting Type
Operating Temperature
Power
Supplier Device Package
Tape & Reel
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
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BUF420M Description

Short technical summary and product information.

The BUF420M is a high voltage fast-switching NPN power transistor manufactured by STMicroelectronics using High Voltage Multi Epitaxial Planar technology. It is designed for high switching speeds and high voltage capacity, utilizing a Cellular Emitter structure with planar edge termination to enhance switching speeds while maintaining a wide RBSOA.

 

The device is rated for a collector-emitter voltage (VCEO) of 450V, a collector current of 30A (60A peak), and a power dissipation of 275W at case temperature 25°C. Switching characteristics include a typical storage time of 1µs and fall time of 0.05µs under specified test conditions.

 

The BUF420M is housed in a TO-3 (TO-204AA) through-hole package, suitable for mounting on heatsinks. It is intended for applications such as switch mode power supplies and motor control.

BUF420M Quick Information

Product Type: Bipolar (BJT) Transistor - Single
Series: BUF
Canonical Name: BUF420M - High Voltage Fast-Switching NPN Power Transistor
Subcategory: High Voltage Fast-Switching

BUF420M Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BUF420M Estimated Pricing

Qty Low High
100+ $7.61 $7.61

Estimated market price range - modelled values for guidance only, not live distributor offers.

BUF420M Features

  • High voltage NPN power transistor rated at 450V VCEO.
  • Continuous collector current up to 30A.
  • Power dissipation of 275W at 25°C case temperature.
  • Fast switching with 1µs typical storage time.
  • Through-hole TO-3 package for easy mounting.

BUF420M Applications

  • Used in switch mode power supplies (SMPS).
  • Suitable for motor control circuits.
  • Ideal for high frequency power conversion.
  • Applicable in industrial and consumer power systems.

BUF420M FAQs

5 frequently asked questions generated from this part’s specifications.
What is the maximum collector-emitter voltage (VCEO) of the BUF420M?

The VCEO is 450V.

What is the continuous collector current rating?

30A continuous, with 60A peak capability.

What is the package type of the BUF420M?

TO-3 (TO-204AA) through-hole package.

What is the maximum junction temperature?

200°C.

Is the BUF420M RoHS compliant?

RoHS3 Compliant (unverified).

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