BUV48A Equivalent & Substitute Parts

Part Overview

The BUV48A is an NPN bipolar junction transistor manufactured by STMicroelectronics, rated for 450 V collector-emitter breakdown voltage and 15 A maximum collector current in a TO-247-3 through-hole package. This device is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product portfolio. Applications requiring this transistor type necessitate identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility while offering current production status or enhanced performance characteristics.

Substiute Parts

BUV48A

STMicroelectronicsIn Stock: 2720BUV48A Datasheet

Current PartRFQ

BUF420AW

STMicroelectronicsIn Stock: 1485BUF420AW Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BUV48A is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor polarity: NPN type
• Voltage rating: Minimum 450 V collector-emitter breakdown voltage
• Current rating: Minimum 15 A collector current capacity
• Power dissipation: Minimum 125 W capability

Mechanical Compatibility Requirements:

• Package type: TO-247-3 through-hole configuration
• Mounting interface: Through-hole compatibility

Regulatory & Compliance Requirements:

• RoHS3 compliance
• REACH unaffected status
• Moisture sensitivity level: 1 (Unlimited)

The BUF420AW meets all electrical and mechanical substitution criteria. It maintains identical voltage rating (450 V), exceeds current capacity (30 A versus 15 A), provides enhanced power rating (200 W versus 125 W), and shares the same TO-247-3 package configuration. The substitute part carries active product status, ensuring ongoing availability and support.

Parameter Comparison

Engineering Selection Recommendations

BUF420AW as Primary Substitute:

The BUF420AW is the direct substitute for the BUV48A. Both devices share identical voltage ratings (450 V) and package configuration (TO-247-3). The BUF420AW provides superior electrical performance with doubled collector current capacity (30 A versus 15 A) and increased power dissipation capability (200 W versus 125 W). This enhanced performance envelope ensures the substitute operates within safe margins in applications originally designed for the BUV48A.

Compliance & Availability:

The BUF420AW maintains full ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original part. The substitute carries active product status, ensuring long-term availability and manufacturer support. The BUV48A's "Not For New Designs" classification makes the BUF420AW the appropriate choice for both legacy system maintenance and new circuit implementations.

Thermal & Mechanical Considerations:

Both devices operate at identical maximum junction temperature (150°C) and share the same through-hole TO-247-3 package footprint. Thermal management requirements remain consistent between the original and substitute parts. PCB layout and heatsink interfaces require no modification.

Frequently Asked Questions (FAQ)

Q: Can the BUF420AW directly replace the BUV48A in existing designs?

A: Yes. The BUF420AW maintains identical voltage rating (450 V), package configuration (TO-247-3), and thermal operating range (150°C TJ). The substitute's higher current capacity (30 A) and power rating (200 W) provide enhanced performance margins without requiring circuit modifications.

Q: What is the significance of the BUV48A's "Not For New Designs" status?

A: This classification indicates the BUV48A has been superseded in STMicroelectronics' product portfolio. The BUF420AW represents the current-generation equivalent, offering improved specifications and guaranteed long-term availability.

Q: Are there any package or pinout differences between these devices?

A: No. Both the BUV48A and BUF420AW use the TO-247-3 through-hole package with identical pinout and mechanical dimensions. Direct PCB substitution is possible without layout modifications.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both devices are ROHS3 compliant, REACH unaffected, and carry moisture sensitivity level 1 (Unlimited). Regulatory compliance profiles are identical.

Q: What are the key electrical differences between these transistors?

A: The primary differences are collector current capacity (BUV48A: 15 A maximum; BUF420AW: 30 A maximum) and power dissipation (BUV48A: 125 W; BUF420AW: 200 W). Voltage rating and thermal characteristics remain identical.

Q: Is the BUF420AW suitable for applications requiring the full 15 A specification of the BUV48A?

A: Yes. The BUF420AW's 30 A rating exceeds the BUV48A's 15 A specification, ensuring adequate performance margin in all applications originally designed for the BUV48A.