IRFP350LC N-Channel MOSFET 400V 16A Equivalent & Substitute Parts

Part Overview

The IRFP350LC is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 400V drain-to-source voltage and 16A continuous drain current in a Through Hole TO-247AC package. This device is classified as Obsolete product status. Due to its obsolete classification, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	400	V
Continuous Drain Current (Id) @ 25°C	16	A
On-State Resistance (Rds On Max) @ Id, Vgs	300 mOhm @ 9.6A, 10V	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ Id	4	V @ 250µA
Gate Charge (Qg Max) @ Vgs	76	nC @ 10V
Input Capacitance (Ciss Max) @ Vds	2200	pF @ 25V
Power Dissipation (Max)	190	W
Operating Temperature Range	-55 to 150	°C
Package Type	TO-247-3	Through Hole
RoHS Status	Non-compliant

Substitute Part Grouping Explanation

Substitute parts for the IRFP350LC are grouped based on the following electrical and mechanical criteria:

Parametric Equivalents share identical or equivalent electrical specifications within the same package type, enabling direct replacement without circuit modification.

Manufacturer Recommended Substitutes provide enhanced or alternative electrical characteristics while maintaining functional compatibility through the same package footprint and mounting type.

The substitution logic is based on:

Drain-to-Source Voltage (Vdss) rating equal to or greater than 400V
Continuous Drain Current (Id) equal to or greater than 16A
On-State Resistance (Rds On) compatible with circuit requirements
Through Hole mounting in TO-247 package family
Operating temperature range of -55°C to 150°C or better
Gate drive voltage compatibility at 10V

Parameter Comparison

Parameter	IRFP350LC	IRFP350LCPBF	IXFH16N50P3	IXFH20N50P3
Manufacturer	Vishay Siliconix	Vishay Siliconix	IXYS	IXYS
Vdss (V)	400	400	500	500
Id @ 25°C (A)	16	16	16	20
Rds On Max (mOhm)	300 @ 9.6A, 10V	300 @ 9.6A, 10V	360 @ 8A, 10V	300 @ 10A, 10V
Vgs(th) Max (V)	4 @ 250µA	4 @ 250µA	5 @ 2.5mA	5 @ 1.5mA
Gate Charge Qg Max (nC)	76 @ 10V	76 @ 10V	29 @ 10V	36 @ 10V
Ciss Max (pF)	2200 @ 25V	2200 @ 25V	1515 @ 25V	1800 @ 25V
Power Dissipation Max (W)	190	190	330	380
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package	TO-247-3	TO-247-3	TO-247-3	TO-247-3
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

IRFP350LCPBF is the direct parametric equivalent to the IRFP350LC. This part maintains identical electrical specifications including 400V Vdss, 16A continuous drain current, and 300 mOhm on-state resistance. The primary distinction is product status: IRFP350LCPBF is Active, whereas the original IRFP350LC is Obsolete. IRFP350LCPBF is ROHS3 compliant, addressing regulatory requirements for new designs. This substitute is recommended for applications requiring exact electrical performance matching and direct pin-compatible replacement.

IXFH16N50P3 is a manufacturer-recommended substitute offering enhanced voltage rating (500V Vdss versus 400V) and increased power dissipation capability (330W versus 190W). This part maintains 16A continuous drain current and compatible on-state resistance characteristics. The IXFH16N50P3 features lower gate charge (29 nC versus 76 nC) and reduced input capacitance (1515 pF versus 2200 pF), resulting in faster switching performance. This substitute is suitable for applications where higher voltage margin or improved thermal performance is beneficial.

IXFH20N50P3 provides increased current rating (20A versus 16A) with 500V Vdss and 380W power dissipation. On-state resistance is maintained at 300 mOhm at higher current levels (10A versus 9.6A). This substitute accommodates applications requiring higher current capacity while maintaining voltage and thermal performance. Gate charge and input capacitance values are intermediate between the IRFP350LC and IXFH16N50P3.

All substitute parts are ROHS3 compliant and Active product status, ensuring long-term availability and regulatory compliance for new production.

Frequently Asked Questions (FAQ)

Q: Can IRFP350LCPBF be used as a direct replacement for IRFP350LC?

A: Yes. IRFP350LCPBF is a parametric equivalent with identical electrical specifications and package type. The parts are pin-compatible and functionally interchangeable. The primary difference is product status and RoHS compliance.

Q: What is the key difference between IRFP350LCPBF and IXFH16N50P3?

A: IRFP350LCPBF maintains the original 400V Vdss rating, while IXFH16N50P3 provides 500V Vdss. Both support 16A continuous drain current. IXFH16N50P3 offers lower gate charge (29 nC versus 76 nC) and reduced input capacitance, enabling faster switching. IXFH16N50P3 also provides higher power dissipation capability (330W versus 190W).

Q: When should IXFH20N50P3 be selected over IXFH16N50P3?

A: IXFH20N50P3 is selected when the application requires continuous drain current exceeding 16A, up to 20A. This part maintains 300 mOhm on-state resistance at 10A, providing improved current handling. Power dissipation is increased to 380W, supporting higher thermal loads.

Q: Are all substitute parts in the same package?

A: Yes. All parts listed use the TO-247-3 package for Through Hole mounting. Pin configuration and footprint are compatible across all substitutes.

Q: What is the impact of lower gate charge in IXFH16N50P3?

A: Lower gate charge (29 nC versus 76 nC) reduces the charge required to switch the device on and off. This results in faster switching transitions, reduced gate drive power consumption, and improved high-frequency performance. Gate drive circuitry may require adjustment for optimal performance.

Q: Are all substitute parts RoHS compliant?

A: IRFP350LCPBF, IXFH16N50P3, and IXFH20N50P3 are all ROHS3 compliant. The original IRFP350LC is RoHS non-compliant. For new designs and production, RoHS-compliant substitutes are required.

Q: Can IXFH16N50P3 or IXFH20N50P3 be used in circuits designed for 400V operation?

A: Yes. Both IXYS parts are rated for 500V Vdss, providing margin above the 400V design specification. The higher voltage rating does not degrade performance in 400V applications and may improve reliability through increased voltage headroom.

Q: What is the inventory status of these substitutes?

A: IRFP350LCPBF has 5215 pieces in stock. IXFH16N50P3 has 14088 pieces in stock. IXFH20N50P3 has 4600 pieces in stock. All substitutes are classified as Active product status, ensuring continued availability.

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