BUF405A The ST BUF405A is a high voltage, fast-switching NPN power transistor designed for industrial and professional power driving applications. It offers a high switching speed of 100 KHz.
Mfr Part #:

BUF405A

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The ST BUF405A is a high voltage, fast-switching NPN power transistor designed for industrial and professional power driving applications. It offers a high switching speed of 100 KHz.
✓ Total Stock: 12 pcs
$ Price Range: $6.44

BUF405A Available from 1 distributor

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✓ Non-Authorised
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12 pcs
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BUF405A Specifications Quick View

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BUF405A Description

Short technical summary and product information.

The BUF405A from ST is an NPN power transistor designed for high-voltage, fast-switching applications. It is suitable for use in switch mode power supplies and motor drivers, offering easy drive circuits and high reliability.

 

Key electrical characteristics include a Collector-Emitter Voltage (VCEV) of 1000V and a Collector-Emitter Voltage (VCEO) of 450V. The continuous Collector Current (IC) is rated at 7.5A, with a peak current (ICM) of 15A. The transistor operates at switching speeds up to 100 KHz.

 

Available in TO-220 and TO-220FP packages, the BUF405A is designed for industrial and professional power driving applications. Its superior switching performance and low crossover losses contribute to reduced dissipation and lower operating temperatures in equipment.

 

Absolute maximum ratings include a maximum junction temperature of 150°C and storage temperatures from -65°C to 150°C. Thermal resistance (junction-to-case) is 1.56 °C/W for the TO-220 package.

BUF405A Quick Information

Product Type: NPN Power Transistor
Canonical Name: BUF405A High Voltage Fast-Switching NPN Power Transistor
Subcategory: NPN

BUF405A Compliance

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

BUF405A Estimated Pricing

Qty Low High
1+ $6.44 $6.44

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

BUF405A Features

  • High voltage NPN power transistor
  • Fast switching speed up to 100 KHz
  • Suitable for off-line applications
  • Easy to drive circuits
  • Available in TO-220 and TO-220FP

BUF405A Applications

  • Switch mode power supplies
  • Motor drivers
  • Industrial power driving
  • Professional power driving

BUF405A FAQs

5 frequently asked questions generated from this part’s specifications.
What is the maximum collector-emitter voltage of the BUF405A?

The maximum collector-emitter voltage is 450 V.

What is the maximum collector current for the BUF405A?

The maximum collector current is 7.5 A.

What package types are available for the BUF405A?

The BUF405A is available in TO-220 and TO-220FP packages.

What is the switching speed of the BUF405A?

The switching speed is rated at 100 KHz.

What is the thermal resistance junction-case of the BUF405A?

The thermal resistance junction-case is 1.56°C/W.

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