BUZ73L Equivalent & Substitute Parts

Part Overview

The BUZ73L is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 200V drain-to-source voltage and 7A continuous drain current in a TO-220-3 through-hole package. This device is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Key Parameters

Parameter	Value
Drain to Source Voltage (Vdss)	200 V
Continuous Drain Current (Id) @ 25°C	7 A
Gate-Source Voltage (Vgs Max)	±20 V
Power Dissipation (Max)	40 W
Operating Temperature Range	-55°C to 150°C
Package Type	TO-220-3
Mounting Type	Through Hole
Technology	N-Channel MOSFET

Substitute Part Grouping Explanation

Substitution of the BUZ73L is determined by the following critical parameters:

Voltage Rating Compatibility: All substitute parts maintain the 200V Vdss specification, ensuring direct voltage-level compatibility in circuit applications.

Package Compatibility: All substitute parts utilize TO-220-3 or TO-220AB package configurations, maintaining identical through-hole mounting footprints and pin assignments.

Gate-Source Voltage: All substitutes operate within the ±20V Vgs maximum specification, ensuring gate drive circuit compatibility.

Current Rating: Substitute parts exceed the 7A continuous drain current requirement, providing enhanced current handling capacity while remaining backward-compatible for applications designed around the BUZ73L.

Temperature Range: Substitute parts extend the upper operating temperature limit to 175°C, compared to the BUZ73L specification of 150°C, providing improved thermal margin.

Parameter Comparison

Parameter	BUZ73L	PHP20NQ20T,127	PHP33NQ20T,127	PSMN057-200P,127
Manufacturer	Infineon Technologies	NXP Semiconductors	Nexperia USA Inc.	Nexperia USA Inc.
Drain to Source Voltage (Vdss)	200 V	200 V	200 V	200 V
Continuous Drain Current (Id) @ 25°C	7 A	20 A	32.7 A	39 A
Rds On (Max)	400 mOhm @ 3.5A, 5V	130 mOhm @ 10A, 10V	77 mOhm @ 15A, 10V	57 mOhm @ 17A, 10V
Gate-Source Voltage (Vgs Max)	±20 V	±20 V	±20 V	±20 V
Power Dissipation (Max)	40 W	150 W	230 W	250 W
Operating Temperature Range	-55°C to 150°C	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Obsolete	Active

Engineering Selection Recommendations

PSMN057-200P,127 is the primary substitute for new designs and procurement. This part maintains active product status with Nexperia USA Inc., ensuring long-term availability and supply chain stability. The PSMN057-200P,127 provides superior electrical performance with 39A continuous drain current and 57 mOhm on-resistance, while maintaining full voltage and package compatibility. RoHS3 compliance and REACH unaffected status align with current regulatory requirements.

PHP20NQ20T,127 serves as an alternative substitute with active product status from NXP Semiconductors. This device offers 20A continuous drain current and 130 mOhm on-resistance, providing adequate performance margin for applications originally designed around the 7A BUZ73L specification.

PHP33NQ20T,127 is available as a secondary option, though classified as obsolete. This part delivers 32.7A continuous drain current and 77 mOhm on-resistance. Obsolete status limits suitability for new long-term designs but may serve existing inventory requirements.

All three substitute parts support the same gate drive voltage levels and thermal operating range extensions, enabling direct circuit integration without modification to gate drive circuitry or thermal management strategies.

Frequently Asked Questions (FAQ)

Q: Can the BUZ73L be directly replaced with any of these substitute parts without circuit modification?

A: Yes. All substitute parts maintain identical voltage ratings (200V Vdss), gate-source voltage specifications (±20V), and TO-220-3 package configurations. Pin assignments and mounting footprints are identical, enabling direct socket replacement.

Q: What is the primary advantage of using substitute parts over the obsolete BUZ73L?

A: Substitute parts provide enhanced current handling capacity (20A to 39A versus 7A), lower on-resistance values (57 mOhm to 130 mOhm versus 400 mOhm), and extended operating temperature ranges (-55°C to 175°C versus -55°C to 150°C). These improvements deliver superior thermal performance and reduced power dissipation in equivalent circuit applications.

Q: Which substitute part is recommended for new designs?

A: PSMN057-200P,127 is recommended for new designs due to active product status, superior electrical performance, and confirmed long-term availability from Nexperia USA Inc.

Q: Are all substitute parts RoHS compliant?

A: PSMN057-200P,127 and PHP33NQ20T,127 carry explicit RoHS3 compliance certification. PHP20NQ20T,127 does not specify RoHS status in available documentation.

Q: Do substitute parts require different thermal management compared to the BUZ73L?

A: Substitute parts feature significantly higher power dissipation ratings (150W to 250W versus 40W) and lower on-resistance values, enabling operation at reduced junction temperatures for equivalent current levels. Existing thermal management solutions designed for the BUZ73L remain compatible but may operate at lower temperatures with substitute parts.

Q: What is the moisture sensitivity level for these substitute parts?

A: PSMN057-200P,127 and PHP33NQ20T,127 specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. PHP20NQ20T,127 specifies Not Applicable for MSL.

Q: Are all substitute parts available in the same packaging options as the BUZ73L?

A: All substitute parts are available in TO-220-3 or TO-220AB through-hole packages. PSMN057-200P,127 and PHP33NQ20T,127 are supplied in tube packaging, while PHP20NQ20T,127 is supplied in bulk packaging.

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