IRFU120Z Equivalent & Substitute Parts Reference

Part Overview

The IRFU120Z (Infineon Technologies) is an N-Channel MOSFET in the HEXFET® series designed for power switching applications, featuring a 100 V drain-to-source voltage and 8.7A continuous drain current. The product is provided in a through-hole IPAK (TO-251AA) package and is currently classified as obsolete. Due to its discontinued status, sourcing equivalent and substitute MOSFETs with compatible electrical and mechanical specifications is essential to maintain performance and design integrity for applications originally utilizing IRFU120Z.

Key Parameters

Parameter	Main Part: IRFU120Z
FET Type	N-Channel
Technology	MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss)	100 V
Current - Continuous Drain (Id) @ 25°C	8.7A (Tc)
Drive Voltage (Max Rds On, Min Rds On)	10V
Rds On (Max) @ Id, Vgs	190mOhm @ 5.2A, 10V
Vgs(th) (Max) @ Id	4V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	10 nC @ 10 V
Vgs (Max)	±20V
Input Capacitance (Ciss) (Max) @ Vds	310 pF @ 25 V
Power Dissipation (Max)	35W (Tc)
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA
RoHS Status	RoHS non-compliant
REACH Status	REACH Unaffected
Part Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for IRFU120Z are grouped by matching these key parameters: FET type (N-Channel), technology (MOSFET, Metal Oxide), drain-to-source voltage (100 V), mounting type (Through Hole), package type (TO-251-3 Short Leads, IPak, TO-251AA), drive voltage (10V), maximum gate-source voltage (±20V), and comparable electrical ratings such as current, Rds On, gate charge, and input capacitance. Substitution is justified solely when parameters align with those of the main part and packaging remains physically compatible.

Parameter Comparison

Parameter	Main Part IRFU120Z	Substitute IRFU120PBF	Substitute STU6NF10
FET Type	N-Channel	N-Channel	N-Channel
Technology	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss)	100 V	100 V	100 V
Current - Continuous Drain (Id) @ 25°C	8.7A (Tc)	7.7A (Tc)	6A (Tc)
Drive Voltage (Max Rds On, Min Rds On)	10V	10V	10V
Rds On (Max) @ Id, Vgs	190mOhm @ 5.2A, 10V	270mOhm @ 4.6A, 10V	250mOhm @ 3A, 10V
Vgs(th) (Max) @ Id	4V @ 250µA	4V @ 250µA	4V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	10 nC @ 10 V	16 nC @ 10 V	14 nC @ 10 V
Vgs (Max)	±20V	±20V	±20V
Input Capacitance (Ciss) (Max) @ Vds	310 pF @ 25 V	360 pF @ 25 V	280 pF @ 25 V
Power Dissipation (Max)	35W (Tc)	42W (Tc)	30W (Tc)
Operating Temperature	-55°C ~ 175°C (TJ)	-55°C ~ 150°C (TJ)	-65°C ~ 175°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Part Status	Obsolete	Active	Active

Engineering Selection Recommendations

The main part IRFU120Z is obsolete and RoHS non-compliant. Substitute parts IRFU120PBF (Vishay Siliconix) and STU6NF10 (STMicroelectronics) are both active and ROHS3 compliant. All substitute parts meet the required environmental and regulatory status (REACH Unaffected, ECCN EAR99). For designs requiring active and compliant components, IRFU120PBF and STU6NF10 are suitable based exclusively on provided parameter matches and compliance criteria.

Frequently Asked Questions (FAQ)

Q1: What are the key criteria for substituting the IRFU120Z MOSFET?
A1: Substitution is determined strictly by matching FET type, technology, drain-to-source voltage, drive voltage, mounting and package type, and comparable electrical ratings.

Q2: Are the packages of IRFU120PBF and STU6NF10 compatible with IRFU120Z?
A2: Yes. All listed substitutes use the TO-251-3 Short Leads, IPak, TO-251AA package, which matches the main part mechanically.

Q3: Is RoHS compliance maintained when switching to substitute parts?
A3: Yes. Both IRFU120PBF and STU6NF10 are ROHS3 compliant, suitable for applications requiring RoHS-compliant components.

Q4: Are there differences in electrical parameters that affect substitution?
A4: Substitute parts have comparable but not identical ratings for current, Rds On, gate charge, and power dissipation. Compatibility should be validated based solely on the listed specification matches.

Q5: Will environmental and export control certifications remain consistent?
A5: All parts listed are REACH unaffected and categorized as ECCN EAR99 and HTSUS 8541.29.0095, maintaining regulatory requirements provided in the input.

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