IRFBC40 N-Channel MOSFET 600V 6.2A TO-220AB Equivalent & Substitute Parts

Part Overview

The IRFBC40 is an N-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) rated for 600V drain-to-source voltage with 6.2A continuous drain current at 25°C. The device is housed in a Through Hole TO-220AB package and dissipates up to 125W at the case temperature. The IRFBC40 is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to support ongoing applications and ensure design continuity where the original part is no longer available from primary sources.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	600	V
Current - Continuous Drain (Id) @ 25°C	6.2	A (Tc)
Rds On (Max) @ Id, Vgs	1.2	Ohm @ 3.7A, 10V
Gate Charge (Qg) (Max) @ Vgs	60	nC @ 10V
Power Dissipation (Max)	125	W (Tc)
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—

Substitute Part Grouping Explanation

Substitution of the IRFBC40 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): Minimum 600V
Continuous Drain Current (Id) @ 25°C: Minimum 6.2A
On-State Resistance (Rds On): Maximum 1.2 Ohm at specified gate voltage
Power Dissipation (Max): Minimum 125W
Gate Charge (Qg): Maximum 60 nC
Mounting Type: Through Hole
Package: TO-220-3 or equivalent TO-220AB

Substitution Logic: Parts are grouped as direct equivalents when all primary electrical parameters match or exceed the IRFBC40 specifications. Parts with higher voltage ratings (Vdss > 600V) or higher current ratings (Id > 6.2A) are acceptable substitutes provided other parameters remain within acceptable ranges. Parts with reduced power dissipation or current ratings are listed as alternatives where application requirements permit reduced performance margins.

Parameter Comparison

Parameter	IRFBC40	IRFBC40PBF	STP7N60M2	STP9NK60Z	STP9NK65Z	STP6N60M2	STP6N62K3	FCP4N60	IPP80R1K2P7XKSA1
Manufacturer	Vishay Siliconix	Vishay Siliconix	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	Fairchild Semiconductor	Infineon Technologies
Vdss (V)	600	600	600	600	650	600	620	600	800
Id @ 25°C (A)	6.2	6.2	5	7	6.4	4.5	5.5	3.9	4.5
Rds On (Max) (Ohm)	1.2	1.2	0.95	0.95	1.2	1.2	1.2	1.2	1.2
Qg (Max) (nC)	60	60	8.8	53	41	8	34	16.6	11
Power Dissipation (Max) (W)	125	125	60	125	125	60	90	50	37
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	150	-55 to 150	-55 to 150
Package	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Identical Electrical and Mechanical Specifications):

IRFBC40PBF is the direct equivalent to the IRFBC40. Both parts share identical electrical specifications: 600V Vdss, 6.2A continuous drain current, 1.2 Ohm Rds On, 60 nC gate charge, and 125W power dissipation. The primary difference is product status: IRFBC40PBF is Active with ROHS3 compliance and REACH Affected status, whereas the original IRFBC40 is Obsolete and RoHS non-compliant. IRFBC40PBF is available in higher inventory (7365 pcs) and is packaged in Tube format. This part is the preferred replacement for direct substitution.

Primary Substitutes (Meets or Exceeds All Critical Parameters):

STP9NK60Z (STMicroelectronics) meets all critical electrical requirements with 600V Vdss, 7A continuous drain current (exceeds 6.2A requirement), 0.95 Ohm Rds On (superior to 1.2 Ohm), and 125W power dissipation (matches requirement). Gate charge is 53 nC (within 60 nC limit). Product is Active with ROHS3 compliance. Inventory is substantial at 25,791 pcs.

STP9NK65Z (STMicroelectronics) provides 650V Vdss (exceeds 600V), 6.4A continuous drain current (exceeds 6.2A), 1.2 Ohm Rds On (matches), 125W power dissipation (matches), and 41 nC gate charge (within limit). Product is Active with ROHS3 compliance. Inventory is 1,823 pcs.

Secondary Substitutes (Reduced Performance Margins):

STP7N60M2 (STMicroelectronics) provides 600V Vdss (matches), 5A continuous drain current (below 6.2A requirement), 0.95 Ohm Rds On (superior), 60W power dissipation (below 125W requirement), and 8.8 nC gate charge (superior). This part is suitable for applications where the 5A current rating is sufficient and thermal dissipation is not critical. Product is Active with ROHS3 compliance. Inventory is 15,465 pcs.

STP6N62K3 (STMicroelectronics) provides 620V Vdss (exceeds 600V), 5.5A continuous drain current (below 6.2A requirement), 1.2 Ohm Rds On (matches), 90W power dissipation (below 125W requirement), and 34 nC gate charge (within limit). Product is Active with ROHS3 compliance. Inventory is 8,365 pcs.

STP6N60M2 (STMicroelectronics) provides 600V Vdss (matches), 4.5A continuous drain current (below 6.2A requirement), 1.2 Ohm Rds On (matches), 60W power dissipation (below 125W requirement), and 8 nC gate charge (superior). Product is Active with ROHS3 compliance. Inventory is 1,300 pcs.

Limited Substitutes (Significant Parameter Deviations):

FCP4N60 (Fairchild Semiconductor) provides 600V Vdss (matches), 3.9A continuous drain current (significantly below 6.2A requirement), 1.2 Ohm Rds On (matches), 50W power dissipation (significantly below 125W requirement), and 16.6 nC gate charge (superior). This part is suitable only for applications with reduced current and power requirements. Product status is Active. Inventory is 3,020 pcs.

IPP80R1K2P7XKSA1 (Infineon Technologies) provides 800V Vdss (exceeds 600V), 4.5A continuous drain current (below 6.2A requirement), 1.2 Ohm Rds On (matches), 37W power dissipation (significantly below 125W requirement), and 11 nC gate charge (superior). This part is suitable only for applications with reduced current and power requirements but higher voltage tolerance. Product is Active with ROHS3 compliance. Inventory is 911 pcs.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and suitable for applications requiring RoHS compliance. The original IRFBC40 is RoHS non-compliant. IRFBC40PBF is REACH Affected; all STMicroelectronics and Infineon parts are REACH Unaffected. FCP4N60 RoHS status is not specified in provided data.

Frequently Asked Questions (FAQ)

Q: Can IRFBC40PBF be used as a direct replacement for IRFBC40?

A: Yes. IRFBC40PBF is electrically and mechanically identical to IRFBC40. Both parts have 600V Vdss, 6.2A continuous drain current, 1.2 Ohm Rds On, 60 nC gate charge, 125W power dissipation, and TO-220-3 package. The primary difference is that IRFBC40PBF is Active product status with ROHS3 compliance, whereas IRFBC40 is Obsolete and RoHS non-compliant.

Q: What is the minimum drain current rating required for a substitute part?

A: The IRFBC40 is rated for 6.2A continuous drain current at 25°C. Substitute parts with lower current ratings (such as STP6N60M2 at 4.5A or FCP4N60 at 3.9A) can be used only if the application circuit does not require the full 6.2A current capacity. Using a part with insufficient current rating may result in thermal stress and reduced component lifetime.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All substitute parts listed are housed in TO-220-3 package or equivalent TO-220AB package format. Physical mounting and thermal interface characteristics are compatible with the original IRFBC40 footprint.

Q: What is the significance of gate charge (Qg) differences between parts?

A: Gate charge affects switching speed and driver circuit requirements. The IRFBC40 has 60 nC gate charge. Substitute parts with lower gate charge (such as STP7N60M2 at 8.8 nC or STP6N60M2 at 8 nC) switch faster and require less driver current. Parts with gate charge within the 60 nC specification are directly compatible with existing gate drive circuits.

Q: Can I use STP9NK60Z instead of IRFBC40 in a high-current application?

A: Yes. STP9NK60Z has 7A continuous drain current, which exceeds the IRFBC40 requirement of 6.2A. It also has superior on-state resistance (0.95 Ohm vs. 1.2 Ohm) and identical 125W power dissipation. STP9NK60Z is suitable for applications requiring the full current capacity of the IRFBC40 or higher.

Q: What is the difference between 600V and 650V rated parts?

A: The IRFBC40 is rated for 600V drain-to-source voltage. Substitute parts with 650V or 800V ratings (such as STP9NK65Z or IPP80R1K2P7XKSA1) have higher voltage withstand capability and can be used in circuits designed for 600V operation. Higher voltage ratings do not affect compatibility in 600V applications.

Q: Why do some substitute parts have lower power dissipation ratings?

A: Power dissipation rating depends on die size and thermal design. The IRFBC40 dissipates 125W at case temperature. Parts with lower ratings (such as STP6N60M2 at 60W or FCP4N60 at 50W) have smaller die areas or different thermal characteristics. These parts are suitable only for applications where thermal dissipation does not exceed their rated power.

Q: Is RoHS compliance important for selecting a substitute part?

A: RoHS compliance is required for applications subject to RoHS regulations. The original IRFBC40 is RoHS non-compliant. All substitute parts listed except FCP4N60 are ROHS3 compliant. If RoHS compliance is required, IRFBC40PBF, STP7N60M2, STP9NK60Z, STP9NK65Z, STP6N60M2, STP6N62K3, or IPP80R1K2P7XKSA1 are suitable choices.

Q: Can I use a part with lower on-state resistance (Rds On) than the IRFBC40?

A: Yes. Lower on-state resistance is beneficial. Parts with 0.95 Ohm Rds On (such as STP7N60M2 or STP9NK60Z) have lower conduction losses compared to the IRFBC40 at 1.2 Ohm. This results in reduced heat generation and improved efficiency. Lower Rds On is a performance improvement and does not create compatibility issues.

Q: What inventory levels should I consider when selecting a substitute?

A: Inventory levels vary significantly. IRFBC40PBF has 7,365 pcs available, STP9NK60Z has 25,791 pcs, and STP7N60M2 has 15,465 pcs. Parts with higher inventory levels provide greater supply security. FCP4N60 and IPP80R1K2P7XKSA1 have lower inventory (3,020 and 911 pcs respectively), which may affect long-term availability.

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