SPP21N10 N-Channel MOSFET 100V 21A Equivalent & Substitute Parts

Part Overview

The SPP21N10 is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 100V drain-to-source voltage with 21A continuous drain current at 25°C. This device is packaged in TO-220-3 through-hole configuration and belongs to the SIPMOS® series. The SPP21N10 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, gate drive characteristics, and thermal performance while accommodating through-hole mounting requirements.

Key Parameters

Parameter	SPP21N10	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	100	V
Continuous Drain Current (Id) @ 25°C	21	A
Drive Voltage (Max Rds On)	10	V
Rds On (Max) @ Id, Vgs	80 mOhm @ 15A, 10V	—
Vgs(th) (Max) @ Id	4 @ 44µA	V
Gate Charge (Qg) (Max) @ Vgs	38.4 @ 10V	nC
Vgs (Max)	±20	V
Input Capacitance (Ciss) (Max) @ Vds	865 @ 25V	pF
Power Dissipation (Max)	90	W
Operating Temperature Range	-55 to 175	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the SPP21N10 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Drain-to-Source Voltage (Vdss): Must equal or exceed 100V
FET Type: N-Channel topology required
Gate Drive Voltage: 10V maximum Rds On specification
Mounting Type: Through-hole configuration
Package: TO-220-3 or compatible TO-220 variants
Operating Temperature Range: Must support -55°C to 175°C

Acceptable Variation Parameters:

Continuous Drain Current (Id): Substitute parts may exceed 21A; lower ratings are not acceptable
Rds On (Max): Lower on-resistance values are acceptable; higher values require verification against application requirements
Gate Charge (Qg): Variations are acceptable within the same voltage class
Input Capacitance (Ciss): Variations are acceptable
Power Dissipation: Equal or greater ratings are acceptable

All three substitute parts (IRF540ZPBF, PHP18NQ10T,127, and STP24NF10) meet these criteria with 100V Vdss ratings, N-Channel configuration, 10V gate drive specifications, and TO-220 through-hole packaging. Each substitute maintains the required operating temperature range and electrical compatibility for direct functional replacement.

Parameter Comparison

Parameter	SPP21N10	IRF540ZPBF	PHP18NQ10T,127	STP24NF10	Unit
Manufacturer	Infineon	Infineon	Nexperia USA Inc.	STMicroelectronics	—
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	—
Vdss	100	100	100	100	V
Id @ 25°C	21	36	18	26	A
Drive Voltage (Max Rds On)	10	10	10	10	V
Rds On (Max) @ Id, Vgs	80 @ 15A, 10V	26.5 @ 22A, 10V	90 @ 9A, 10V	60 @ 12A, 10V	mOhm
Vgs(th) (Max) @ Id	4 @ 44µA	4 @ 250µA	4 @ 1mA	4 @ 250µA	V
Gate Charge (Qg) (Max) @ Vgs	38.4 @ 10V	63 @ 10V	21 @ 10V	41 @ 10V	nC
Vgs (Max)	±20	±20	±20	±20	V
Ciss (Max) @ Vds	865 @ 25V	1770 @ 25V	633 @ 25V	870 @ 25V	pF
Power Dissipation (Max)	90	92	79	85	W
Operating Temperature	-55 to 175	-55 to 175	-55 to 175	-55 to 175	°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	—
Package	TO-220-3	TO-220AB	TO-220AB	TO-220	—
Product Status	Obsolete	Active	Obsolete	Active	—
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

IRF540ZPBF (Infineon Technologies, Active Status)

The IRF540ZPBF is an active-status substitute offering superior electrical performance with 36A continuous drain current and reduced on-resistance of 26.5 mOhm at 22A, 10V. This part provides enhanced current handling capacity and improved thermal efficiency compared to the SPP21N10. The IRF540ZPBF is ROHS3 compliant and maintains identical voltage ratings and operating temperature specifications. Higher gate charge (63 nC) and input capacitance (1770 pF) require verification against gate driver capabilities in existing circuit designs. Recommended for new designs and production continuity where active-status components are preferred.

STP24NF10 (STMicroelectronics, Active Status)

The STP24NF10 is an active-status substitute from STMicroelectronics offering 26A continuous drain current with 60 mOhm on-resistance at 12A, 10V. This part provides moderate current increase and improved on-resistance performance relative to the SPP21N10. The STP24NF10 is ROHS3 compliant and maintains full electrical compatibility across voltage, temperature, and gate drive specifications. Gate charge (41 nC) and input capacitance (870 pF) are closely matched to the original part, minimizing circuit redesign requirements. Recommended for direct replacement in existing designs requiring active-status component availability.

PHP18NQ10T,127 (Nexperia USA Inc., Obsolete Status)

The PHP18NQ10T,127 is an obsolete-status substitute offering 18A continuous drain current with 90 mOhm on-resistance at 9A, 10V. This part provides slightly lower current rating and marginally higher on-resistance compared to the SPP21N10. The PHP18NQ10T,127 is ROHS3 compliant and maintains full electrical compatibility. Lower gate charge (21 nC) and reduced input capacitance (633 pF) may provide advantages in gate-drive-limited applications. Obsolete status limits long-term availability; use only when active alternatives are unsuitable for specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the IRF540ZPBF directly replace the SPP21N10 in existing circuit boards?

A: The IRF540ZPBF is electrically compatible with the SPP21N10 across all critical parameters: 100V Vdss, N-Channel topology, 10V gate drive, and TO-220 through-hole packaging. Physical pin configuration is identical. However, the higher gate charge (63 nC versus 38.4 nC) and input capacitance (1770 pF versus 865 pF) require verification that existing gate driver circuits can supply adequate current and switching speed. No PCB modifications are required for mechanical fit.

Q: What is the difference between TO-220-3 and TO-220AB packaging?

A: TO-220-3 and TO-220AB are functionally equivalent through-hole packages with identical pin configurations and mechanical dimensions. Both accommodate three leads (Gate, Drain, Source) in the same physical footprint. TO-220AB is a variant designation used by some manufacturers. All substitute parts are compatible with PCB layouts designed for TO-220-3 mounting.

Q: Why does the STP24NF10 have lower on-resistance than the SPP21N10?

A: On-resistance values are measured at different drain current levels. The SPP21N10 specifies 80 mOhm at 15A, while the STP24NF10 specifies 60 mOhm at 12A. Lower on-resistance indicates improved channel conductivity and reduced power dissipation during operation. The STP24NF10 provides better thermal performance in applications operating near the 21A rating of the original part.

Q: Is the PHP18NQ10T,127 suitable for applications requiring the full 21A rating of the SPP21N10?

A: The PHP18NQ10T,127 is rated for 18A continuous drain current, which is below the 21A specification of the SPP21N10. This part is not suitable for applications requiring sustained operation at or above 21A. Use only in applications where the actual operating current does not exceed 18A, or where the lower current rating is acceptable for the specific design.

Q: What compliance certifications apply to all substitute parts?

A: All three substitute parts are ROHS3 compliant and carry REACH Unaffected status, matching the regulatory compliance profile of the SPP21N10. All parts are classified under ECCN EAR99 and HTSUS 8541.29.0095. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture handling requirements.

Q: Which substitute part is recommended for new product designs?

A: The STP24NF10 (STMicroelectronics, active status) is recommended for new designs. It offers active-status availability, ROHS3 compliance, balanced electrical performance with 26A current rating and 60 mOhm on-resistance, and gate charge/capacitance values closely matched to the original SPP21N10. This minimizes design modifications while ensuring long-term component availability.

Q: Can multiple substitute parts be used interchangeably within the same production run?

A: All three substitute parts meet the electrical and mechanical compatibility criteria for the SPP21N10. However, differences in gate charge, input capacitance, and on-resistance may affect circuit performance characteristics such as switching speed and thermal behavior. Interchangeability within a single production run requires verification that all parts operate within acceptable performance margins for the specific application. Standardizing on a single substitute part is recommended for production consistency.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message