IRLZ34 N-Channel MOSFET 60V 30A TO-220AB Equivalent & Substitute Parts

Part Overview

The IRLZ34 is an N-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) rated for 60V drain-to-source voltage and 30A continuous drain current in a Through Hole TO-220AB package. This device is classified as Obsolete by the original manufacturer (Vishay Siliconix), making equivalent and substitute parts necessary for ongoing design support, production continuity, and component procurement.

The IRLZ34 operates across a temperature range of -55°C to 175°C (junction temperature) and dissipates up to 88W at the case temperature. It features a gate threshold voltage of 2V at 250µA and an on-state resistance (Rds On) of 50mOhm at 18A and 5V gate-source voltage.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	60	V
Continuous Drain Current (Id) @ 25°C	30	A (Tc)
Rds On (Max) @ Id, Vgs	50 mOhm @ 18A, 5V	—
Gate Threshold Voltage (Vgs(th)) @ Id	2	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	35	nC @ 5V
Maximum Gate-Source Voltage (Vgs Max)	±10	V
Input Capacitance (Ciss) (Max) @ Vds	1600	pF @ 25V
Power Dissipation (Max)	88	W (Tc)
Operating Temperature Range (TJ)	-55 to 175	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
Product Status	Obsolete	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the IRLZ34 is determined by strict alignment of electrical and mechanical parameters within the N-Channel MOSFET category. The following criteria establish valid substitution relationships:

Primary Substitution Criteria:

FET Type: N-Channel (required match)
Technology: MOSFET (Metal Oxide) (required match)
Drain to Source Voltage (Vdss): 60V or higher (equal or greater rating)
Continuous Drain Current (Id) @ 25°C: 30A or higher (equal or greater rating)
Mounting Type: Through Hole (required match)
Package / Case: TO-220-3 or TO-220AB (mechanically compatible)
Operating Temperature Range: -55°C to 175°C or wider (equal or wider range)

Secondary Alignment Parameters:

Rds On (Max): Lower or equal values indicate improved performance
Gate Threshold Voltage (Vgs(th)): Compatibility with existing gate drive circuits
Gate Charge (Qg): Lower values reduce switching losses
Input Capacitance (Ciss): Lower values reduce gate drive requirements
Power Dissipation (Max): Equal or higher ratings ensure thermal compatibility

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical specifications with different product status or packaging) and Functional Equivalents (meeting or exceeding all critical electrical parameters with potential variations in secondary characteristics).

Parameter Comparison

Parameter	IRLZ34	IRLZ34PBF	IRLZ34NPBF	FQP30N06L	FQP30N06	STP36NF06L
Manufacturer	Vishay Siliconix	Vishay Siliconix	Infineon Technologies	onsemi	onsemi	STMicroelectronics
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel
Vdss (V)	60	60	55	60	60	60
Id @ 25°C (A Tc)	30	30	30	32	30	30
Rds On (Max) @ Id, Vgs (mOhm)	50 @ 18A, 5V	50 @ 18A, 5V	35 @ 16A, 10V	35 @ 16A, 10V	40 @ 15A, 10V	40 @ 15A, 10V
Vgs(th) (Max) @ Id (V)	2 @ 250µA	2 @ 250µA	2 @ 250µA	2.5 @ 250µA	4 @ 250µA	2.5 @ 250µA
Qg (Max) @ Vgs (nC)	35 @ 5V	35 @ 5V	25 @ 5V	20 @ 5V	25 @ 10V	17 @ 5V
Vgs (Max) (±V)	±10	±10	±16	±20	±25	±18
Ciss (Max) @ Vds (pF)	1600 @ 25V	1600 @ 25V	880 @ 25V	1040 @ 25V	945 @ 25V	660 @ 25V
Power Dissipation (Max) (W Tc)	88	88	68	79	79	70
Operating Temperature (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Active	Active	Obsolete	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Preferred for Pin-Compatible Replacement):

IRLZ34PBF is the direct equivalent of the IRLZ34. Both parts share identical electrical specifications (60V Vdss, 30A Id, 50mOhm Rds On @ 18A/5V, 35nC Qg @ 5V) and mechanical packaging (TO-220-3). The primary distinction is product status: IRLZ34PBF is Active and ROHS3 Compliant, whereas the original IRLZ34 is Obsolete and RoHS non-compliant. IRLZ34PBF is supplied in Tube packaging and maintains full backward compatibility for direct substitution in existing designs.

Active Product Alternatives (Recommended for New Designs):

IRLZ34NPBF (Infineon Technologies) is an Active product with ROHS3 compliance. It operates at 55V Vdss (5V lower than the original) and maintains 30A Id rating. The Rds On is improved to 35mOhm @ 16A/10V, and gate charge is reduced to 25nC @ 5V. This part is suitable for applications where the 55V rating is sufficient and where improved switching characteristics are beneficial.

STP36NF06L (STMicroelectronics) is an Active product with ROHS3 compliance, rated for 60V Vdss and 30A Id. It features improved Rds On of 40mOhm @ 15A/10V and significantly reduced gate charge of 17nC @ 5V. Input capacitance is substantially lower at 660pF @ 25V, reducing gate drive power requirements. Power dissipation is rated at 70W (Tc), which is lower than the original 88W but remains adequate for most applications.

FQP30N06L (onsemi) is an Active product with ROHS3 compliance, rated for 60V Vdss and 32A Id (2A higher than the original). It provides improved Rds On of 35mOhm @ 16A/10V and reduced gate charge of 20nC @ 5V. This part offers enhanced current handling capability and is suitable for applications requiring higher current margins.

Obsolete Alternatives (Not Recommended for New Designs):

FQP30N06 (onsemi) meets the electrical requirements (60V Vdss, 30A Id) but is classified as Obsolete. It is ROHS3 Compliant and features 40mOhm Rds On @ 15A/10V and 25nC Qg @ 10V. This part should not be selected for new designs due to its obsolete status and limited future availability.

Compliance Considerations:

The original IRLZ34 is RoHS non-compliant. All recommended substitute parts (IRLZ34PBF, IRLZ34NPBF, STP36NF06L, FQP30N06L) are ROHS3 Compliant, making them suitable for applications subject to RoHS regulations. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can IRLZ34PBF be used as a direct replacement for IRLZ34?

A: Yes. IRLZ34PBF is electrically and mechanically identical to IRLZ34. Both are rated for 60V Vdss, 30A Id, and feature 50mOhm Rds On @ 18A/5V. Both use TO-220-3 packaging. The primary difference is that IRLZ34PBF is Active and ROHS3 Compliant, whereas IRLZ34 is Obsolete and RoHS non-compliant. IRLZ34PBF is the recommended direct replacement.

Q: What is the difference between IRLZ34NPBF and IRLZ34?

A: IRLZ34NPBF operates at 55V Vdss compared to the original 60V. Both maintain 30A Id rating. IRLZ34NPBF features improved Rds On of 35mOhm @ 16A/10V (versus 50mOhm @ 18A/5V) and reduced gate charge of 25nC @ 5V (versus 35nC @ 5V). IRLZ34NPBF is Active and ROHS3 Compliant. It is suitable for applications where 55V rating is acceptable and improved switching performance is desired.

Q: Is STP36NF06L compatible with IRLZ34 in terms of gate drive requirements?

A: STP36NF06L has a gate threshold voltage of 2.5V @ 250µA (versus 2V for IRLZ34) and a maximum gate-source voltage of ±18V (versus ±10V for IRLZ34). Gate charge is significantly lower at 17nC @ 5V compared to 35nC @ 5V. These differences indicate that STP36NF06L requires less gate drive power and is compatible with gate drive circuits designed for the IRLZ34, provided the gate drive voltage does not exceed ±10V.

Q: Can FQP30N06L handle higher current than IRLZ34?

A: Yes. FQP30N06L is rated for 32A Id @ 25°C (Tc) compared to 30A for IRLZ34. This provides a 2A margin for higher current applications. Both parts share the same 60V Vdss rating and TO-220-3 packaging. FQP30N06L features improved Rds On of 35mOhm @ 16A/10V and reduced gate charge of 20nC @ 5V.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All substitute parts listed (IRLZ34PBF, IRLZ34NPBF, FQP30N06L, FQP30N06, STP36NF06L) use TO-220-3 or TO-220AB packaging, which are mechanically compatible. Pin configuration and lead spacing are identical, allowing direct board-level substitution without layout modifications.

Q: Which substitute part is recommended for new designs?

A: For new designs, STP36NF06L or FQP30N06L are recommended. Both are Active products with ROHS3 compliance. STP36NF06L offers the lowest gate charge (17nC @ 5V) and input capacitance (660pF @ 25V), reducing gate drive power requirements. FQP30N06L provides the highest current rating (32A) and improved Rds On (35mOhm @ 16A/10V). Both parts ensure long-term availability and regulatory compliance.

Q: What is the impact of lower gate charge on circuit performance?

A: Lower gate charge reduces the energy required to switch the MOSFET on and off, decreasing gate drive power dissipation and enabling faster switching transitions. STP36NF06L (17nC @ 5V) and FQP30N06L (20nC @ 5V) require less gate drive current compared to IRLZ34 (35nC @ 5V), allowing the use of lower-power gate driver circuits and reducing overall system power consumption.

Q: Is IRLZ34NPBF suitable for 60V applications?

A: IRLZ34NPBF is rated for 55V Vdss, which is 5V lower than the original IRLZ34 (60V). It is not suitable for applications requiring the full 60V rating. However, for applications operating at 55V or below, IRLZ34NPBF provides improved performance characteristics, including lower Rds On and reduced gate charge, while maintaining Active product status and ROHS3 compliance.

Q: What are the RoHS compliance implications of using IRLZ34 in new designs?

A: The original IRLZ34 is RoHS non-compliant. For applications subject to RoHS regulations (including RoHS 2 and RoHS 3), substitute parts must be selected from ROHS3 Compliant options: IRLZ34PBF, IRLZ34NPBF, STP36NF06L, or FQP30N06L. All these alternatives are ROHS3 Compliant and suitable for regulated markets.

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