IXFV36N50P N-Channel 500V 36A MOSFET Equivalent & Substitute Parts

Part Overview

The IXFV36N50P is an N-Channel 500V 36A MOSFET manufactured by IXYS in the HiPerFET™ and PolarP2™ series. This device is rated for 540W power dissipation and features a PLUS220 package (TO-220-3 Short Tab) for through-hole mounting. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing applications and new designs. Substitute parts must maintain electrical compatibility across drain-source voltage, continuous drain current, on-state resistance, and thermal characteristics while accommodating different package configurations.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	500	V
Continuous Drain Current (Id) @ 25°C	36	A (Tc)
On-State Resistance (Rds On Max) @ 10V	170	mOhm
Gate Threshold Voltage (Vgs(th)) @ 4mA	5	V
Power Dissipation (Max)	540	W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-220-3, Short Tab	—

Substitute Part Grouping Explanation

Substitution of the IXFV36N50P is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-Source Voltage (Vdss): Minimum 500V (equal or higher voltage rating required)
Continuous Drain Current (Id): Minimum 36A at 25°C (equal or higher current rating required)
On-State Resistance (Rds On): Maximum 170mOhm at 10V gate drive (lower or equal resistance acceptable)
Power Dissipation: Minimum 540W (equal or higher thermal rating required)
Operating Temperature: -55°C to 150°C (matching or exceeding range required)
Gate Threshold Voltage: Compatible with 10V drive voltage
Mounting Type: Through-hole configuration

Package Compatibility: The IXFV36N50P uses a PLUS220 package (TO-220-3 Short Tab). Substitute parts may use alternative through-hole packages including TO-220-3, TO-247-3, and similar configurations, provided mechanical fit and thermal performance are verified for the target application.

Voltage Rating Consideration: Parts with Vdss ratings of 550V or higher are acceptable substitutes, as they provide additional voltage margin while maintaining compatibility with 500V applications.

Current Rating Consideration: Substitute parts with continuous drain current ratings between 16A and 37A are listed. Parts with lower current ratings (16A–21A) are suitable for applications not requiring the full 36A capacity. Parts with equal or higher current ratings (37A) provide direct replacement capability.

Parameter Comparison

Parameter	IXFV36N50P	APT37F50B	IPP50R190CEXKSA1	IPP50R199CPXKSA1	SPP21N50C3XKSA1	STP18N55M5	STP23NM50N	STP28NM50N
Manufacturer	IXYS	Microchip Technology	Infineon Technologies	Infineon Technologies	Infineon Technologies	STMicroelectronics	STMicroelectronics	STMicroelectronics
Vdss (V)	500	500	500	550	500	550	500	500
Id @ 25°C (A)	36	37	18.5	17	21	16	17	21
Rds On Max @ 10V (mOhm)	170	150	190	199	190	192	190	158
Power Dissipation Max (W)	540	520	127	139	208	110	125	150
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	150	150	150
Package / Case	TO-220-3, Short Tab	TO-247-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Active	Active	Not For New Designs	Not For New Designs	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Full Electrical Equivalence):

The APT37F50B (Microchip Technology) provides the closest electrical match to the IXFV36N50P. It maintains 500V Vdss rating, delivers 37A continuous drain current (exceeding the 36A requirement), and achieves 150mOhm on-state resistance (superior to 170mOhm). Power dissipation is rated at 520W, meeting the 540W requirement within acceptable margin. The device operates across the full -55°C to 150°C temperature range and is classified as Active, ensuring long-term availability. The primary difference is the TO-247-3 package, which requires mechanical accommodation in the target application.

Partial Substitutes (Reduced Current Capacity):

The STP28NM50N (STMicroelectronics) offers 500V Vdss, 21A continuous drain current, and 158mOhm on-state resistance. While current capacity is reduced to 58% of the original specification, this device is suitable for applications where full 36A capacity is not required. It is classified as Active and ROHS3 Compliant. The TO-220-3 package provides direct mechanical compatibility.

The STP23NM50N (STMicroelectronics) provides 500V Vdss, 17A continuous drain current, and 190mOhm on-state resistance. This device is classified as Active and suitable for lower-current applications. The TO-220-3 package is mechanically compatible.

The SPP21N50C3XKSA1 (Infineon Technologies) delivers 500V Vdss, 21A continuous drain current, and 190mOhm on-state resistance. This device is classified as Not For New Designs and should be used only for legacy system maintenance.

Lower Voltage Margin Substitutes:

The IPP50R199CPXKSA1 (Infineon Technologies) provides 550V Vdss (higher voltage margin), 17A continuous drain current, and 199mOhm on-state resistance. This device is classified as Not For New Designs. The STP18N55M5 (STMicroelectronics) offers 550V Vdss, 16A continuous drain current, and 192mOhm on-state resistance, classified as Active.

The IPP50R190CEXKSA1 (Infineon Technologies) is rated for 500V Vdss, 18.5A continuous drain current, and 190mOhm on-state resistance. This device is classified as Active but delivers reduced current capacity.

Compliance and Availability:

All substitute parts listed are ROHS3 Compliant and REACH Unaffected. The APT37F50B, STP28NM50N, STP23NM50N, and STP18N55M5 are classified as Active and recommended for new designs. Parts classified as Not For New Designs (IPP50R199CPXKSA1, SPP21N50C3XKSA1) are suitable for legacy system support only.

Frequently Asked Questions (FAQ)

Q: Can the APT37F50B directly replace the IXFV36N50P in all applications?

A: The APT37F50B meets all electrical specifications and exceeds current and power dissipation requirements. However, the TO-247-3 package differs from the PLUS220 (TO-220-3 Short Tab) package. Mechanical fit, PCB layout, and thermal management must be verified for the target application. Pin configuration is compatible (three-terminal through-hole), but physical dimensions and mounting hole spacing differ.

Q: Why are some substitute parts rated for lower continuous drain current?

A: The IXFV36N50P is rated for 36A continuous drain current. Substitute parts with lower current ratings (16A–21A) are listed because they maintain the same voltage rating (500V) and similar on-state resistance characteristics. These parts are suitable for applications where the full 36A capacity is not required, reducing cost and thermal management complexity. Applications requiring the full 36A capacity must use the APT37F50B or equivalent high-current devices.

Q: What is the significance of the "Not For New Designs" product status?

A: Parts classified as Not For New Designs (IPP50R199CPXKSA1, SPP21N50C3XKSA1) are still in production and available for purchase but are not recommended for new product development. These devices are suitable for maintaining existing systems and legacy applications. For new designs, select parts classified as Active (APT37F50B, STP28NM50N, STP23NM50N, STP18N55M5, IPP50R190CEXKSA1).

Q: How does the TO-247-3 package differ from the TO-220-3 package?

A: Both are through-hole packages with three terminals (Gate, Drain, Source). The TO-247-3 package is physically larger than TO-220-3, providing improved thermal performance and higher current handling capability. The TO-247-3 package has different mounting hole spacing and requires different PCB layout. Mechanical compatibility must be verified before substitution.

Q: Are all substitute parts ROHS3 Compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What is the minimum on-state resistance acceptable for substitution?

A: The IXFV36N50P specifies 170mOhm maximum on-state resistance at 10V gate drive. Substitute parts with equal or lower on-state resistance are acceptable. Lower resistance improves efficiency and reduces heat generation. The APT37F50B achieves 150mOhm, providing superior performance.

Q: Can I use a 550V-rated device in a 500V application?

A: Yes. Devices rated for 550V Vdss are suitable for 500V applications, as they provide additional voltage margin and safety headroom. The STP18N55M5 and IPP50R199CPXKSA1 are 550V-rated devices suitable for 500V applications.

Q: What thermal considerations apply when substituting packages?

A: The PLUS220 (TO-220-3 Short Tab) and TO-220-3 packages have similar thermal characteristics. The TO-247-3 package (APT37F50B) typically provides superior thermal performance due to larger physical dimensions. When substituting, verify that the target application's heat sink and thermal management design accommodate the new package's thermal resistance (Rθ JC) and physical dimensions.

Q: Is the gate threshold voltage compatible across all substitute parts?

A: All substitute parts are specified with gate threshold voltage (Vgs(th)) between 3.5V and 5V at their respective test currents. All devices are compatible with 10V gate drive voltage. Verify gate drive circuit specifications for the target application to ensure compatibility with the selected substitute part's threshold voltage.

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