IXFA5N50P3 N-Channel 500V 5A MOSFET Equivalent & Substitute Parts

Part Overview

The IXFA5N50P3 is an N-Channel MOSFET manufactured by IXYS, rated for 500V drain-to-source voltage and 5A continuous drain current in a TO-263AA surface mount package. This device is part of the HiPerFET™ and Polar3™ series and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the TO-263 package family and preserve critical electrical parameters including voltage rating, current handling capability, and thermal characteristics.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	500	V
Continuous Drain Current (Id) @ 25°C	5	A (Tc)
On-State Resistance (Rds On) @ Id, Vgs	1.65	Ohm @ 2.5A, 10V
Gate Threshold Voltage (Vgs(th)) @ Id	5	V @ 1mA
Gate Charge (Qg) @ Vgs	6.9	nC @ 10V
Input Capacitance (Ciss) @ Vds	370	pF @ 25V
Power Dissipation (Max)	114	W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	TO-263-3, D2PAK	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the IXFA5N50P3 is determined by the following critical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 500V
Continuous Drain Current (Id): Must equal or exceed 5A at 25°C
Package Type: Must be TO-263 family (D2PAK, TO-263-3, TO-263AB)
Mounting Type: Surface Mount
Operating Temperature Range: Must encompass -55°C to 150°C

Secondary Compatibility Factors:

On-State Resistance (Rds On): Lower values indicate improved performance
Gate Charge (Qg): Lower values reduce switching losses
Power Dissipation: Must support thermal requirements of the application
Regulatory Compliance: RoHS3 and REACH status

Substitute parts are categorized into two groups:

Group 1 - Direct Manufacturer Upgrade (IXYS): The IXFA12N50P maintains identical voltage rating (500V) and package family (TO-263AA) while providing enhanced current capability (12A vs. 5A) and improved thermal performance (200W vs. 114W). This part is from the same manufacturer and active product line.

Group 2 - Cross-Manufacturer Alternatives (Vishay Siliconix): The IRF830 series (IRF830ASPBF, IRF830ASTRLPBF, IRF830SPBF, IRF830STRLPBF) and IRF720 series (IRF720SPBF, IRF720STRRPBF) provide functional equivalence through matching voltage and current specifications within the TO-263 package family. These parts are active products with established supply chains.

Parameter Comparison

Parameter	IXFA5N50P3	IXFA12N50P	IRF830ASPBF	IRF830ASTRLPBF	IRF830SPBF	IRF830STRLPBF	IRF720SPBF	IRF720STRRPBF
Vdss (V)	500	500	500	500	500	500	400	400
Id @ 25°C (A)	5	12	5	5	4.5	4.5	3.3	3.3
Rds On (Ohm)	1.65 @ 2.5A, 10V	0.5 @ 6A, 10V	1.4 @ 3A, 10V	1.4 @ 3A, 10V	1.5 @ 2.7A, 10V	1.5 @ 2.7A, 10V	1.8 @ 2A, 10V	1.8 @ 2A, 10V
Vgs(th) (V)	5 @ 1mA	5.5 @ 1mA	4.5 @ 250µA	4.5 @ 250µA	4 @ 250µA	4 @ 250µA	4 @ 250µA	4 @ 250µA
Qg (nC)	6.9 @ 10V	29 @ 10V	24 @ 10V	24 @ 10V	38 @ 10V	38 @ 10V	20 @ 10V	20 @ 10V
Ciss (pF)	370 @ 25V	1830 @ 25V	620 @ 25V	620 @ 25V	610 @ 25V	610 @ 25V	410 @ 25V	410 @ 25V
Power Dissipation (W)	114 (Tc)	200 (Tc)	74 (Tc)	74 (Tc)	74 (Tc)	74 (Tc)	50 (Tc)	50 (Tc)
Operating Temp (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

IXFA12N50P (MFR Recommended Substitute)

The IXFA12N50P is the manufacturer-recommended upgrade path. It maintains the same 500V voltage rating, TO-263AA package, and operating temperature range as the IXFA5N50P3. The part is in active production status with established supply availability (1139 pcs in stock). It provides superior current handling (12A vs. 5A) and thermal performance (200W vs. 114W), making it suitable for applications requiring higher power density. RoHS3 compliance and REACH unaffected status are maintained. This part is recommended for new designs and production transitions.

IRF830 Series (IRF830ASPBF, IRF830ASTRLPBF, IRF830SPBF, IRF830STRLPBF)

The IRF830 series from Vishay Siliconix provides cross-manufacturer equivalence with 500V voltage rating and TO-263 package compatibility. The IRF830ASTRLPBF variant offers the highest inventory availability (10265 pcs) and is supplied in Tape & Reel format for automated assembly. All IRF830 variants maintain RoHS3 compliance and REACH unaffected status. These parts are suitable for applications where the 5A current rating of the original part is adequate. The IRF830ASPBF and IRF830ASTRLPBF variants match the 5A rating exactly; IRF830SPBF and IRF830STRLPBF variants provide 4.5A rating with comparable thermal performance.

IRF720 Series (IRF720SPBF, IRF720STRRPBF)

The IRF720 series provides an alternative cross-manufacturer option with reduced voltage rating (400V vs. 500V) and lower current rating (3.3A vs. 5A). These parts are suitable only for applications where the 400V voltage specification is acceptable and current requirements do not exceed 3.3A. Both variants are in active production with high inventory availability (1845 and 2100 pcs respectively). RoHS3 compliance and REACH unaffected status are maintained. The IRF720STRRPBF is supplied in Tape & Reel format.

Selection Criteria Summary:

For direct replacement with enhanced performance: Select IXFA12N50P
For 500V, 5A cross-manufacturer equivalence: Select IRF830ASTRLPBF (highest availability, Tape & Reel packaging)
For 500V, 4.5A cross-manufacturer equivalence: Select IRF830SPBF or IRF830STRLPBF
For 400V applications only: Select IRF720SPBF or IRF720STRRPBF

All recommended substitutes are active products with RoHS3 compliance and established supply chains.

Frequently Asked Questions (FAQ)

Q: Can the IXFA12N50P be used as a direct replacement for the IXFA5N50P3?

A: Yes. The IXFA12N50P maintains identical voltage rating (500V), package type (TO-263AA), and operating temperature range (-55°C to 150°C). The higher current rating (12A vs. 5A) and power dissipation (200W vs. 114W) make it a suitable upgrade. Pin compatibility and electrical interface are preserved.

Q: What is the key difference between the IRF830 variants (ASPBF, ASTRLPBF, SPBF, STRLPBF)?

A: The primary differences are packaging format and current rating. IRF830ASPBF and IRF830ASTRLPBF are rated for 5A continuous drain current; IRF830SPBF and IRF830STRLPBF are rated for 4.5A. The suffix indicates packaging: SPBF denotes Tube packaging, while STRLPBF and STRRPBF denote Tape & Reel (TR) format. All variants share identical voltage rating (500V), package type (TO-263), and operating temperature range.

Q: Can IRF720 series parts replace the IXFA5N50P3?

A: IRF720 series parts are not direct replacements. They have a reduced voltage rating (400V vs. 500V) and lower current rating (3.3A vs. 5A). These parts are suitable only for applications where the 400V voltage specification is acceptable and current requirements do not exceed 3.3A. Verify application voltage requirements before selection.

Q: What does the "STRLPBF" suffix indicate?

A: The STRLPBF suffix indicates Tape & Reel (TR) packaging format with lead-free (PbF) termination. This packaging is suitable for automated pick-and-place assembly. The equivalent tube-packaged variant uses the SPBF suffix.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts (IXFA12N50P, IRF830 series, and IRF720 series) are RoHS3 compliant and REACH unaffected. Regulatory compliance is maintained across all substitution options.

Q: What is the significance of the TO-263 package family compatibility?

A: The TO-263 package family (including D2PAK, TO-263-3, and TO-263AB designations) ensures mechanical and thermal compatibility. All substitute parts use this package family, allowing direct PCB footprint compatibility without layout modifications. Pin configuration and thermal tab placement are preserved.

Q: Which substitute part has the best availability?

A: The IRF830ASTRLPBF has the highest inventory availability at 10265 pcs in stock. This part is supplied in Tape & Reel format and is suitable for high-volume production. The IXFA12N50P has 1139 pcs available and is the manufacturer-recommended option.

Q: How do gate charge (Qg) differences affect circuit design?

A: Gate charge affects switching speed and driver circuit requirements. The IXFA5N50P3 has the lowest gate charge (6.9 nC), while the IRF830SPBF and IRF830STRLPBF have the highest (38 nC). Higher gate charge requires more driver current or longer switching times. Verify that the gate driver circuit can supply adequate current for the selected substitute part.

Q: What is the impact of on-state resistance (Rds On) differences?

A: On-state resistance directly affects conduction losses and heat generation. Lower Rds On values reduce power dissipation. The IXFA12N50P has the lowest Rds On (0.5 Ohm @ 6A, 10V), while the IRF720 series has the highest (1.8 Ohm @ 2A, 10V). For applications with high current or duty cycle, lower Rds On values improve efficiency.

Q: Can substitute parts be mixed in the same circuit?

A: Mixing different substitute parts in the same circuit is not recommended. Differences in gate charge, threshold voltage, and on-state resistance can cause unequal current sharing and thermal stress. Use a single part number throughout the design for consistent performance and reliability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message