IRFRC20 N-Channel 600V 2A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFRC20 is an N-Channel 600V 2A MOSFET manufactured by Vishay Siliconix in a surface mount DPAK package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The IRFRC20 operates across a temperature range of -55°C to 150°C and is rated for 2.5W at ambient temperature and 42W at case temperature. Due to its obsolete status, equivalent parts with active product status or improved specifications are required for new applications and existing system maintenance.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	2	A (Tc)
Drive Voltage (Max Rds On)	10	V
Rds On (Max) @ Id, Vgs	4.4	Ohm @ 1.2A, 10V
Gate Threshold Voltage Vgs(th) (Max) @ Id	4	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	18	nC @ 10V
Power Dissipation (Max)	2.5 / 42	W (Ta) / W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	TO-252-3, DPAK	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the IRFRC20 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): 600V minimum
Continuous Drain Current (Id): 2A minimum at 25°C case temperature
Drive Voltage: 10V gate drive compatibility
Package: TO-252-3 DPAK surface mount configuration
Operating Temperature: -55°C to 150°C minimum range
Rds On (Max): 4.4 Ohm or lower at specified Id and Vgs conditions

Substitution Logic: Parts are grouped as direct equivalents when all primary parameters match or exceed the IRFRC20 specifications. Parts with higher current ratings (2.5A or greater) or improved Rds On characteristics are classified as enhanced substitutes. All substitute parts must maintain the same package footprint and surface mount compatibility to ensure PCB layout compatibility without redesign.

Parameter Comparison

Parameter	IRFRC20	IRFRC20PBF	AOD2N60	AOD3N60	FQD2N60CTM	STD2HNK60Z	STD2N62K3
Manufacturer	Vishay Siliconix	Vishay Siliconix	Alpha & Omega	Alpha & Omega	onsemi	STMicroelectronics	STMicroelectronics
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel
Vdss (V)	600	600	600	600	600	600	620
Id @ 25°C (A)	2	2	2	2.5	1.9	2	2.2
Drive Voltage (V)	10	10	10	10	10	10	10
Rds On (Max) @ Id, Vgs (Ohm)	4.4 @ 1.2A, 10V	4.4 @ 1.2A, 10V	4.4 @ 1A, 10V	3.5 @ 1.25A, 10V	4.7 @ 950mA, 10V	4.8 @ 1A, 10V	3.6 @ 1.1A, 10V
Vgs(th) (Max) @ Id (V)	4 @ 250µA	4 @ 250µA	4.5 @ 250µA	4.5 @ 250µA	4 @ 250µA	4.5 @ 50µA	4.5 @ 50µA
Gate Charge Qg (Max) @ Vgs (nC)	18 @ 10V	18 @ 10V	11 @ 10V	12 @ 10V	12 @ 10V	15 @ 10V	15 @ 10V
Vgs (Max) (V)	±20	±20	±30	±30	±30	±30	±30
Ciss (Max) @ Vds (pF)	350 @ 25V	350 @ 25V	325 @ 25V	370 @ 25V	235 @ 25V	280 @ 25V	340 @ 50V
Power Dissipation (Max) (W)	2.5 (Ta) / 42 (Tc)	2.5 (Ta) / 42 (Tc)	56.8 (Tc)	56.8 (Tc)	2.5 (Ta) / 44 (Tc)	45 (Tc)	45 (Tc)
Operating Temperature (°C)	-55 to 150	-55 to 150	-50 to 150	-50 to 150	-55 to 150	-55 to 150	-55 to 150
Package	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Product Status	Obsolete	Active	Not For New Designs	Not For New Designs	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalent: The IRFRC20PBF is the direct parametric equivalent of the IRFRC20, manufactured by the same supplier (Vishay Siliconix) with identical electrical specifications. The IRFRC20PBF is classified as active product status and is RoHS3 compliant, making it the primary replacement for obsolete IRFRC20 units. The only difference is packaging format (tube versus unspecified), which does not affect electrical performance or PCB compatibility.

Active Product Alternatives: For applications requiring active product status with enhanced specifications, the following parts are suitable:

FQD2N60CTM (onsemi): Active product status with identical 600V/2A ratings and matching gate threshold voltage. Slightly higher Rds On (4.7 Ohm) and lower gate charge (12 nC) provide acceptable performance trade-offs. Operating temperature range matches the IRFRC20 (-55°C to 150°C).
STD2HNK60Z (STMicroelectronics): Active product status with 600V/2A ratings and SuperMESH™ technology. Rds On of 4.8 Ohm and gate charge of 15 nC are within acceptable substitution parameters. Operating temperature range matches the IRFRC20.
STD2N62K3 (STMicroelectronics): Active product status with enhanced 620V/2.2A ratings and SuperMESH3™ technology. Improved Rds On of 3.6 Ohm provides superior performance. Gate charge of 15 nC is acceptable. Operating temperature range matches the IRFRC20.

Enhanced Current Capability: The AOD3N60 (Alpha & Omega Semiconductor) provides 2.5A continuous drain current with improved Rds On of 3.5 Ohm, offering enhanced performance margin. However, this part is classified as "Not For New Designs," limiting its suitability for new applications.

Compliance Considerations: All recommended active substitutes are RoHS3 compliant, addressing regulatory requirements that the obsolete IRFRC20 does not meet. The IRFRC20PBF is the only direct equivalent with active status and full RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the IRFRC20PBF be used as a direct replacement for the IRFRC20? A: Yes. The IRFRC20PBF is electrically and mechanically identical to the IRFRC20. Both devices have 600V Vdss, 2A continuous drain current, 4.4 Ohm Rds On, and identical gate charge specifications. The IRFRC20PBF is active product status and RoHS3 compliant, making it the preferred replacement.

Q: What is the difference between the IRFRC20 and IRFRC20PBF? A: The electrical specifications are identical. The primary difference is product status (obsolete versus active) and packaging format (tube for IRFRC20PBF). Both use the same TO-252-3 DPAK package footprint.

Q: Are all substitute parts pin-compatible with the IRFRC20? A: Yes. All listed substitute parts use the TO-252-3 DPAK package with identical pin configuration (2 leads plus tab). No PCB layout modifications are required for substitution.

Q: Can I use the AOD3N60 instead of the IRFRC20? A: The AOD3N60 is electrically compatible with superior specifications (2.5A versus 2A, 3.5 Ohm versus 4.4 Ohm Rds On). However, the AOD3N60 is classified as "Not For New Designs," which may restrict its use in new product development depending on design guidelines.

Q: What is the significance of the "Not For New Designs" status? A: Parts with "Not For New Designs" status are still available but manufacturers recommend against using them in new applications. These parts may have limited long-term availability or may be transitioning to end-of-life. For new designs, select parts with "Active" product status.

Q: Which substitute offers the best performance improvement? A: The STD2N62K3 provides the best performance improvement with 620V Vdss, 2.2A continuous drain current, and 3.6 Ohm Rds On (compared to 4.4 Ohm in the IRFRC20). This part is active product status and RoHS3 compliant.

Q: Are there any temperature range limitations with the substitutes? A: The AOD2N60 and AOD3N60 have a minimum operating temperature of -50°C, compared to -55°C for the IRFRC20. All other substitutes maintain the full -55°C to 150°C range. Verify application requirements before selecting these parts.

Q: What does RoHS3 compliance mean for the IRFRC20 replacement? A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, restricting lead, cadmium, mercury, and other hazardous materials. The original IRFRC20 is non-compliant. All recommended active substitutes are RoHS3 compliant, meeting current regulatory requirements.

Q: Can I mix IRFRC20 and substitute parts in the same production batch? A: All listed parts are electrically compatible and use identical package footprints. However, mixing parts from different manufacturers may introduce minor variations in gate charge, threshold voltage, and Rds On characteristics. Verify circuit performance if mixing parts from different suppliers.

Q: What is the gate charge significance when selecting a substitute? A: Gate charge (Qg) affects switching speed and driver circuit requirements. The IRFRC20 has 18 nC gate charge. Substitutes range from 11 nC to 15 nC, resulting in faster switching and lower driver power dissipation. Lower gate charge is beneficial but does not prevent substitution.

Q: Is the IRFRC20PBF available in higher quantities than the IRFRC20? A: Yes. The IRFRC20PBF has 7,852 pieces in stock compared to 5,167 pieces for the IRFRC20. The IRFRC20PBF is the recommended choice for production continuity due to active product status and higher inventory availability.

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