FQPF11N40C N-Channel MOSFET 400V 10.5A Equivalent & Substitute Parts

Part Overview

The FQPF11N40C is an N-Channel MOSFET manufactured by onsemi, rated for 400V drain-to-source voltage with 10.5A continuous drain current in a Through Hole TO-220F-3 package. This device is part of the QFET® series and is classified as Obsolete. Due to its obsolete status, equivalent and substitute parts are necessary for ongoing production, maintenance, and design continuity. Substitute parts must maintain electrical compatibility within the specified voltage and current operating ranges while accommodating package and thermal characteristics.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	400	V
Continuous Drain Current (Id) @ 25°C	10.5	A
On-State Resistance (Rds On) @ 5.25A, 10V	530	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	35	nC
Power Dissipation (Max)	44	W
Operating Temperature Range	-55 to 150	°C
Package Type	TO-220-3	Through Hole
FET Type	N-Channel
Technology	MOSFET (Metal Oxide)

Substitute Part Grouping Explanation

Substitution of the FQPF11N40C is determined by the following critical parameters:

Voltage Rating Compatibility: Substitute parts must have a Vdss rating equal to or greater than 400V. Parts with higher voltage ratings (550V, 650V) are acceptable as they provide additional voltage margin.

Current Rating Compatibility: Substitute parts must have continuous drain current (Id) ratings at or above 10.5A to maintain equivalent current-handling capability. Parts rated at 9A, 10A, 12A, or 13A are evaluated based on application requirements.

On-State Resistance (Rds On): Lower Rds On values indicate improved efficiency and reduced power dissipation. Substitute parts with Rds On values between 360mOhm and 570mOhm are within acceptable operating parameters.

Package and Mounting: All substitute parts must use Through Hole mounting in TO-220 package variants (TO-220F-3, TO-220FP, TO-220SIS) to ensure mechanical and thermal compatibility.

Operating Temperature Range: All substitute parts must support the -55°C to 150°C operating temperature range.

Compliance and Status: RoHS3 compliance and REACH unaffected status are maintained across all substitute options.

Parameter Comparison

Parameter	FQPF11N40C (Main)	FCPF360N65S3R0L-F154	STP11NK40ZFP	TK12A55D(STA4,Q,M)	TK13A45D(STA4,Q,M)
Manufacturer	onsemi	onsemi	STMicroelectronics	Toshiba	Toshiba
Vdss (V)	400	650	400	550	450
Id @ 25°C (A)	10.5	10	9	12	13
Rds On (mOhm)	530	360	550	570	460
Vgs(th) (V)	4	4.5	4.5	4	4
Qg @ 10V (nC)	35	18	32	28	25
Power Dissipation (W)	44	27	30	45	45
Operating Temp Range (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Not For New Designs	Active	Active	Active
RoHS3 Compliant	Yes	Yes	Yes	Yes	Yes

Engineering Selection Recommendations

FCPF360N65S3R0L-F154 (onsemi SuperFET® III): This part is the manufacturer-recommended substitute from onsemi. It provides 650V voltage rating with 10A continuous current, exceeding the voltage specification of the FQPF11N40C. The improved Rds On of 360mOhm reduces power dissipation to 27W compared to the original 44W. However, this part is classified as Not For New Designs, limiting its use to legacy system support and replacement applications. RoHS3 compliance and identical operating temperature range ensure compatibility.

STP11NK40ZFP (STMicroelectronics SuperMESH™): This part maintains the 400V voltage rating with 9A continuous current, providing a close electrical match to the FQPF11N40C. The Active product status makes it suitable for new designs and ongoing production. Rds On of 550mOhm is comparable to the original specification. The TO-220FP package is mechanically compatible with TO-220-3 footprints. RoHS3 compliance and full operating temperature range support are confirmed.

TK13A45D(STA4,Q,M) (Toshiba π-MOSVII): This part offers 450V voltage rating with 13A continuous current, providing enhanced current capability. The improved Rds On of 460mOhm and reduced gate charge of 25nC support faster switching performance. Active product status enables use in new designs. The TO-220SIS package is mechanically compatible with standard TO-220-3 footprints. RoHS3 compliance is confirmed.

TK12A55D(STA4,Q,M) (Toshiba π-MOSVII): This part provides 550V voltage rating with 12A continuous current. The Rds On of 570mOhm and gate charge of 28nC are comparable to the original device. Active product status supports ongoing production. The TO-220SIS package maintains mechanical compatibility. RoHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can the FCPF360N65S3R0L-F154 be used as a direct replacement for the FQPF11N40C?

A: The FCPF360N65S3R0L-F154 is electrically compatible as a substitute. It meets or exceeds all critical parameters: 650V Vdss (exceeds 400V requirement), 10A Id (meets 10.5A requirement), and improved Rds On of 360mOhm. The TO-220-3 package is mechanically identical. However, its Not For New Designs status restricts use to legacy applications and replacement scenarios.

Q: What is the difference between the Toshiba TK13A45D and TK12A55D options?

A: The TK13A45D provides 450V/13A with 460mOhm Rds On, while the TK12A55D provides 550V/12A with 570mOhm Rds On. The TK13A45D offers higher current capacity and lower on-state resistance, making it suitable for applications requiring maximum current handling. The TK12A55D provides higher voltage margin. Both are Active products with identical thermal and compliance characteristics.

Q: Is the STP11NK40ZFP suitable for new design implementations?

A: Yes. The STP11NK40ZFP maintains the 400V voltage rating and provides 9A continuous current with Active product status. It is suitable for new designs and ongoing production. The 1A reduction in current rating compared to the FQPF11N40C must be evaluated against application requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—FCPF360N65S3R0L-F154, STP11NK40ZFP, TK12A55D(STA4,Q,M), and TK13A45D(STA4,Q,M)—are RoHS3 compliant and REACH unaffected, matching the compliance status of the FQPF11N40C.

Q: What is the significance of the different package designations (TO-220F-3, TO-220FP, TO-220SIS)?

A: All three package designations represent Through Hole TO-220 variants with identical pin configurations and mechanical footprints. TO-220F-3 and TO-220FP are standard full-pack variants, while TO-220SIS is a Toshiba-specific designation. All are mechanically interchangeable in standard TO-220 PCB layouts.

Q: How does the gate charge (Qg) difference affect circuit performance?

A: Gate charge values range from 18nC (FCPF360N65S3R0L-F154) to 35nC (FQPF11N40C). Lower gate charge enables faster switching transitions and reduced driver power requirements. Parts with lower Qg values (18nC, 25nC, 28nC) provide improved switching performance compared to the original 35nC specification.

Q: Can I use a higher voltage-rated part (650V) in place of the 400V original?

A: Yes. The FCPF360N65S3R0L-F154 with 650V rating is electrically compatible and provides additional voltage margin. Higher voltage ratings do not compromise performance in 400V applications; they provide enhanced reliability and headroom for transient overvoltage conditions.

Q: What inventory availability should I consider for production planning?

A: Current inventory levels are: FQPF11N40C (32,600 pcs), STP11NK40ZFP (29,068 pcs), TK13A45D (940 pcs), FCPF360N65S3R0L-F154 (1,685 pcs), and TK12A55D (825 pcs). The STP11NK40ZFP offers the highest availability for immediate production needs.

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