IRF9540STRR P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRF9540STRR is a P-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) manufactured by Vishay Siliconix, rated for 100V drain-to-source voltage with 19A continuous drain current at 25°C. The device is housed in a Surface Mount TO-263 (D2PAK) package and is currently in active product status with 1,046 pieces in stock.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific compliance requirements. The IRF9540STRR is RoHS non-compliant, which may require substitution in applications subject to RoHS3 regulations. Additionally, alternative part numbers within the same base product family or from alternative manufacturers may be required to meet specific packaging, compliance, or performance specifications.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	100	V
Continuous Drain Current (Id) @ 25°C	19	A (Tc)
On-State Resistance (Rds On Max) @ 11A, 10V	200	mOhm
Gate-Source Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	61	nC
Input Capacitance (Ciss) @ 25V	1400	pF
Power Dissipation (Max)	3.7 (Ta), 150 (Tc)	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-263 (D2PAK)	Surface Mount
FET Type	P-Channel	—
Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitute parts for the IRF9540STRR are identified based on strict electrical and mechanical parameter compatibility within the P-Channel MOSFET category. The substitution logic is based on the following criteria:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 100V
Package Type: Must be TO-263 (D2PAK) Surface Mount
FET Type: Must be P-Channel
Technology: Must be MOSFET (Metal Oxide)
Operating Temperature Range: Must support -55°C to 175°C minimum
Gate-Source Threshold Voltage (Vgs(th)): Must be 4V @ 250µA
Maximum Gate-Source Voltage (Vgs Max): Must be ±20V

Secondary Compatibility Parameters:

Continuous Drain Current (Id): Substitutes with equal or higher current rating are acceptable
On-State Resistance (Rds On): Lower or equal values indicate improved performance
Gate Charge (Qg): Lower values indicate faster switching characteristics
Input Capacitance (Ciss): Variations within the specified range are acceptable
Power Dissipation: Higher ratings provide design margin

Substitutes are grouped into two categories: parametric equivalents (identical electrical specifications with different packaging or compliance status) and manufacturer-recommended alternatives (functionally compatible parts with performance variations).

Parameter Comparison

Parameter	IRF9540STRR (Main)	IRF9540STRLPBF (Parametric Equivalent)	IRF9530NSTRLPBF (MFR Recommended)	IRF9540NSTRLPBF (MFR Recommended)
Manufacturer	Vishay Siliconix	Vishay Siliconix	Infineon Technologies	Infineon Technologies
Drain-to-Source Voltage (Vdss)	100 V	100 V	100 V	100 V
Continuous Drain Current (Id) @ 25°C	19 A (Tc)	19 A (Tc)	14 A (Tc)	23 A (Tc)
On-State Resistance (Rds On Max)	200 mOhm @ 11A, 10V	200 mOhm @ 11A, 10V	200 mOhm @ 8.4A, 10V	117 mOhm @ 14A, 10V
Gate-Source Threshold Voltage (Vgs(th))	4 V @ 250µA	4 V @ 250µA	4 V @ 250µA	4 V @ 250µA
Gate Charge (Qg) @ 10V	61 nC	61 nC	58 nC	110 nC
Input Capacitance (Ciss) @ 25V	1400 pF	1400 pF	760 pF	1450 pF
Maximum Gate-Source Voltage (Vgs Max)	±20 V	±20 V	±20 V	±20 V
Power Dissipation (Max)	3.7 W (Ta), 150 W (Tc)	3.7 W (Ta), 150 W (Tc)	3.8 W (Ta), 79 W (Tc)	3.1 W (Ta), 110 W (Tc)
Operating Temperature Range	-55 to 175 °C (TJ)	-55 to 175 °C (TJ)	-55 to 175 °C (TJ)	-55 to 150 °C (TJ)
Package Type	TO-263 (D2PAK)	TO-263 (D2PAK)	D2PAK	D2PAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
FET Type	P-Channel	P-Channel	P-Channel	P-Channel
Technology	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)
RoHS Status	RoHS Non-Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	1,046 Pcs	70,400 Pcs	21,200 Pcs	41,400 Pcs

Engineering Selection Recommendations

IRF9540STRLPBF (Parametric Equivalent - Vishay Siliconix)

The IRF9540STRLPBF is a direct parametric equivalent to the IRF9540STRR with identical electrical specifications. The primary distinction is RoHS3 compliance status and packaging format (Cut Tape & Digi-Reel). This substitute is appropriate for applications requiring RoHS3 compliance or when alternative packaging formats are acceptable. Inventory availability is significantly higher at 70,400 pieces. This part maintains all electrical performance characteristics of the main part and is suitable for direct substitution in new designs or redesigns requiring compliance certification.

IRF9530NSTRLPBF (MFR Recommended - Infineon Technologies)

The IRF9530NSTRLPBF is a manufacturer-recommended alternative from Infineon Technologies with a lower continuous drain current rating of 14A compared to the 19A specification of the main part. This substitute is appropriate only for applications where the 14A current rating is sufficient for the design requirements. The device offers RoHS3 compliance and REACH unaffected status. The lower input capacitance (760 pF) may provide switching performance advantages in certain circuit topologies. This part is not suitable for applications requiring the full 19A current capability.

IRF9540NSTRLPBF (MFR Recommended - Infineon Technologies)

The IRF9540NSTRLPBF is a manufacturer-recommended alternative from Infineon Technologies with an enhanced continuous drain current rating of 23A, exceeding the 19A specification of the main part. This substitute provides improved current handling capability and lower on-state resistance (117 mOhm versus 200 mOhm), resulting in reduced power dissipation during operation. The device offers RoHS3 compliance and REACH unaffected status. The operating temperature range is limited to -55°C to 150°C, which is 25°C lower than the main part's maximum junction temperature. This part is suitable for applications requiring higher current capacity or lower on-state resistance, provided the reduced maximum operating temperature is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the IRF9540STRLPBF be used as a direct replacement for the IRF9540STRR?

A: Yes. The IRF9540STRLPBF is a parametric equivalent with identical electrical specifications. The primary differences are RoHS3 compliance status and packaging format. Both parts are P-Channel MOSFETs with 100V Vdss, 19A continuous drain current, 200 mOhm Rds On, and identical gate threshold voltage and capacitance specifications. Mechanical compatibility is confirmed through identical TO-263 (D2PAK) package designation.

Q: What is the key difference between the IRF9530NSTRLPBF and the main IRF9540STRR?

A: The IRF9530NSTRLPBF has a lower continuous drain current rating of 14A compared to the IRF9540STRR's 19A rating. All other electrical parameters including Vdss (100V), Rds On (200 mOhm), and Vgs(th) (4V) are identical. This substitute is appropriate only for applications where 14A current capacity is sufficient.

Q: What advantages does the IRF9540NSTRLPBF offer over the IRF9540STRR?

A: The IRF9540NSTRLPBF provides higher continuous drain current (23A versus 19A) and significantly lower on-state resistance (117 mOhm versus 200 mOhm). These characteristics result in reduced power dissipation and improved thermal performance. The trade-off is a reduced maximum operating temperature of 150°C versus 175°C for the main part.

Q: Are all substitute parts available in the same TO-263 (D2PAK) package?

A: Yes. All substitute parts listed are housed in TO-263 (D2PAK) Surface Mount packages with identical mechanical dimensions and pin configurations, ensuring direct board-level compatibility.

Q: Which substitute part should be selected for RoHS3-compliant applications?

A: All three substitute parts (IRF9540STRLPBF, IRF9530NSTRLPBF, and IRF9540NSTRLPBF) are RoHS3 compliant. The IRF9540STRLPBF is the direct parametric equivalent and is recommended for applications requiring RoHS3 compliance with no electrical specification changes.

Q: What is the impact of the lower input capacitance in the IRF9530NSTRLPBF?

A: The IRF9530NSTRLPBF has an input capacitance of 760 pF compared to 1400 pF in the main part. Lower input capacitance typically results in faster gate charging and switching transitions, which may improve switching frequency performance in certain circuit topologies. However, this part has a reduced current rating and should only be selected if both the lower current capacity and capacitance characteristics are acceptable for the application.

Q: Can the IRF9540NSTRLPBF be used in applications requiring operation above 150°C junction temperature?

A: No. The IRF9540NSTRLPBF has a maximum operating temperature of 150°C, which is 25°C lower than the IRF9540STRR's 175°C specification. Applications requiring operation above 150°C must use the main part or the IRF9540STRLPBF parametric equivalent, both of which support 175°C operation.

Q: Are there any REACH compliance differences between the substitute parts?

A: Yes. The IRF9530NSTRLPBF and IRF9540NSTRLPBF from Infineon Technologies are REACH unaffected. The IRF9540STRLPBF from Vishay Siliconix is REACH affected. Applications subject to REACH regulations should verify compliance requirements with the specific substitute part selected.

Q: What is the significance of the different gate charge specifications among the substitute parts?

A: Gate charge (Qg) affects the energy required to switch the transistor and influences gate driver design. The main part and IRF9540STRLPBF both have 61 nC gate charge. The IRF9530NSTRLPBF has 58 nC (slightly lower), while the IRF9540NSTRLPBF has 110 nC (significantly higher). Higher gate charge requires more energy from the gate driver circuit and may impact switching speed in high-frequency applications.

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