FQPF10N50CF N-Channel 500V 10A MOSFET Equivalent & Substitute Parts

Part Overview

The FQPF10N50CF is an N-Channel 500V 10A MOSFET manufactured by onsemi in the FRFET® series, housed in a TO-220F-3 through-hole package. This device is classified as obsolete, indicating it has reached end-of-life status and is no longer recommended for new designs. The part remains in inventory with 31,800 units available as new original stock.

Due to its obsolete status, equivalent and substitute parts are necessary for ongoing maintenance, repair, and legacy system support. Suitable alternatives must maintain electrical compatibility across critical parameters including drain-source voltage rating, continuous drain current capability, gate charge characteristics, and thermal performance specifications.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	500	V
Continuous Drain Current (Id) @ 25°C	10	A
Rds On (Max) @ 5A, 10V	610	mOhm
Gate Charge (Qg) @ 10V	56	nC
Input Capacitance (Ciss) @ 25V	2096	pF
Power Dissipation (Max)	48	W
Operating Temperature Range	-55 to 150	°C
Package Type	TO-220-3	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the FQPF10N50CF is determined by the following critical parameters:

Primary Compatibility Criteria:

Drain to Source Voltage (Vdss): Must equal or exceed 500V
Continuous Drain Current (Id): Must equal or exceed 10A at 25°C
Gate Charge (Qg): Must be compatible with existing gate drive circuitry
Input Capacitance (Ciss): Should remain within acceptable switching performance limits
Package Type: Must be through-hole TO-220 variant for mechanical compatibility
Operating Temperature Range: Must support -55°C to 150°C minimum

Secondary Compatibility Considerations:

Rds On characteristics affect thermal performance and power dissipation
Vgs(th) threshold voltage must be compatible with gate drive voltage levels
RoHS3 compliance and REACH status ensure regulatory alignment

Substitute parts are grouped into two categories: MFR Recommended (direct replacement from same manufacturer with active product status) and Similar (alternative manufacturers with equivalent electrical performance but different product lifecycle status).

Parameter Comparison

Parameter	FQPF10N50CF	FQPF13N50CF	STF11NM50N	STF13NK50Z	STP11NK50ZFP	TK9A45D(STA4,Q,M)
Manufacturer	onsemi	onsemi	STMicroelectronics	STMicroelectronics	STMicroelectronics	Toshiba
Vdss (V)	500	500	500	500	500	450
Id @ 25°C (A)	10	13	8.5	11	10	9
Rds On (mOhm)	610 @ 5A	540 @ 6.5A	470 @ 4.5A	480 @ 6.5A	520 @ 4.5A	770 @ 4.5A
Qg (nC)	56	56	19	47	68	16
Ciss (pF)	2096 @ 25V	2055 @ 25V	547 @ 50V	1600 @ 25V	1390 @ 25V	800 @ 25V
Power Dissipation (W)	48	48	25	30	30	40
Operating Temp (°C)	-55 to 150	-55 to 150	to 150	-55 to 150	-55 to 150	to 150
Package	TO-220F-3	TO-220F-3	TO-220FP	TO-220FP	TO-220FP	TO-220SIS
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: FQPF13N50CF

The FQPF13N50CF is the manufacturer-recommended equivalent from onsemi. This part maintains identical voltage and package specifications (500V, TO-220F-3) while providing enhanced current capability (13A versus 10A). The device carries active product status, ensuring continued availability and manufacturing support. Both parts share identical gate charge (56 nC), input capacitance characteristics (2055 pF versus 2096 pF), and operating temperature range (-55°C to 150°C). RoHS3 compliance and REACH unaffected status align with the original part. This substitute is suitable for direct replacement in existing designs without circuit modification.

Secondary Recommendations: STF13NK50Z and STP11NK50ZFP

STF13NK50Z (STMicroelectronics SuperMESH™ series) provides 500V, 11A continuous current in TO-220FP package with active product status. This part meets or exceeds the original specifications with lower Rds On (480 mOhm) and maintains the full operating temperature range. Gate charge of 47 nC is compatible with existing gate drive circuits.

STP11NK50ZFP (STMicroelectronics SuperMESH™ series) matches the original 10A current rating at 500V with active product status. However, this part carries "Not For New Designs" designation, limiting its suitability to legacy system maintenance only.

Alternative Consideration: STF11NM50N

STF11NM50N (STMicroelectronics MDmesh™ II series) operates at 500V with 8.5A continuous current. This part exhibits significantly lower gate charge (19 nC) and input capacitance (547 pF), which may require gate drive circuit evaluation. Power dissipation rating of 25W is lower than the original 48W specification. This part is suitable only for applications where the reduced current rating and thermal performance are acceptable.

Not Recommended: TK9A45D(STA4,Q,M)

The Toshiba TK9A45D operates at 450V, which is below the original 500V specification. This voltage reduction disqualifies it as a direct substitute for applications requiring full 500V rating. This part is listed only for reference and should not be selected for replacement applications.

Frequently Asked Questions (FAQ)

Q: Can FQPF13N50CF directly replace FQPF10N50CF without circuit modification?

A: Yes. The FQPF13N50CF is the manufacturer-recommended equivalent with identical voltage rating (500V), package type (TO-220F-3), gate charge (56 nC), and operating temperature range (-55°C to 150°C). The higher current rating (13A versus 10A) provides design margin without requiring circuit changes.

Q: What is the significance of the "Not For New Designs" status on STP11NK50ZFP?

A: This designation indicates the part is in mature phase with limited manufacturing support and no active development. While electrically compatible, it should be used only for maintenance of existing systems. For new designs or long-term production, FQPF13N50CF or STF13NK50Z are preferred.

Q: Why does STF11NM50N have significantly lower gate charge (19 nC) compared to the original (56 nC)?

A: STF11NM50N uses MDmesh™ II technology, which differs from the FRFET® technology in the original part. Lower gate charge reduces switching losses but may require gate drive circuit evaluation to ensure compatibility with existing timing and current requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, ensuring regulatory alignment with the original FQPF10N50CF.

Q: Can STF13NK50Z be used in applications requiring the full -55°C to 150°C operating range?

A: Yes. STF13NK50Z supports the complete -55°C to 150°C operating temperature range, matching the original specification.

Q: What is the key difference between TO-220F-3 and TO-220FP packages?

A: Both are through-hole TO-220 variants with identical pin configuration and mechanical footprint compatibility. The designations reflect manufacturer-specific package nomenclature. Mechanical mounting and electrical connectivity are equivalent.

Q: Why is TK9A45D listed if it cannot replace FQPF10N50CF?

A: TK9A45D is included for reference as it was listed in the original part's substitute field. However, its 450V rating falls below the required 500V specification, making it unsuitable for direct replacement in applications requiring full voltage rating.

Q: Which substitute part offers the best thermal performance?

A: FQPF13N50CF maintains the original 48W power dissipation rating while providing higher current capability. For applications with thermal constraints, this part is optimal. STF13NK50Z and STP11NK50ZFP offer 30W ratings, suitable for lower power applications.

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

A: FQPF13N50CF and STF13NK50Z are electrically compatible and can be used interchangeably in most applications. However, gate charge and input capacitance differences should be evaluated for switching frequency and gate drive circuit performance. STP11NK50ZFP should not be mixed with active-status parts due to its "Not For New Designs" classification.

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