FCP20N60 N-Channel 600V 20A MOSFET Equivalent & Substitute Parts

Part Overview

The FCP20N60 is an N-Channel 600V 20A MOSFET manufactured by onsemi in the SuperFET™ series, housed in a TO-220-3 through-hole package. This device is rated for 208W power dissipation and operates across the temperature range of -55°C to 150°C. The part is designated as "Not For New Designs," indicating it has been superseded in onsemi's product portfolio. Equivalent and substitute parts are necessary to maintain design flexibility, ensure supply chain continuity, and support legacy system maintenance where this device is currently deployed.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	20	A
Rds On (Max) @ 10A, 10V	190	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	5	V
Gate Charge (Qg) @ 10V	98	nC
Input Capacitance (Ciss) @ 25V	3080	pF
Power Dissipation (Max)	208	W
Operating Temperature Range	-55 to 150	°C
Package Type	TO-220-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the FCP20N60 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): 600V minimum
Continuous Drain Current (Id): 20A or greater
Rds On (Max): 190mOhm or lower at specified gate voltage
Gate Threshold Voltage (Vgs(th)): Compatible with 5V or lower
Package Type: TO-220-3 or equivalent through-hole package
Operating Temperature Range: -55°C to 150°C minimum

Substitution Logic: Parts are grouped into two categories based on their electrical compatibility with the FCP20N60:

Category A - Direct Equivalents (600V, 20A class): Parts with 600V Vdss, 20A or greater continuous drain current, and 190mOhm or lower Rds On. These devices maintain the same voltage and current ratings as the FCP20N60 and are suitable for direct replacement in existing designs.

Category B - Functional Alternatives (600V, higher current or 650V class): Parts with 600V or 650V Vdss and drain current ratings of 20A or greater. These devices provide equal or superior electrical performance and are suitable for applications where the FCP20N60 is specified, provided thermal and board layout considerations are addressed.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On @ 10V (mOhm)	Vgs(th) (V)	Qg @ 10V (nC)	Ciss @ 25V/100V (pF)	Power Dissipation (W)	Package	Product Status
FCP20N60	onsemi	600	20	190 @ 10A	5 @ 250µA	98	3080 @ 25V	208	TO-220-3	Not For New Designs
AOT20S60L	Alpha & Omega	600	20	199 @ 10A	4.1 @ 250µA	19.8	1038 @ 100V	266	TO-220-3	Not For New Designs
AOT25S65L	Alpha & Omega	650	25	190 @ 12.5A	4 @ 250µA	26.4	1278 @ 100V	357	TO-220-3	Active
AOT27S60L	Alpha & Omega	600	27	160 @ 13.5A	4 @ 250µA	26	1294 @ 100V	357	TO-220-3	Not For New Designs
IXKC20N60C	IXYS	600	15	190 @ 16A	3.9 @ 1mA	114	2400 @ 25V	—	ISOPLUS220™	Active
SPP20N60C3XKSA1	Infineon	600	20.7	190 @ 13.1A	3.9 @ 1mA	114	2400 @ 25V	208	TO-220-3	Active
SPP20N65C3XKSA1	Infineon	650	20.7	190 @ 13.1A	3.9 @ 1mA	114	2400 @ 25V	208	TO-220-3	Not For New Designs
STP22NM60N	STMicroelectronics	600	16	220 @ 8A	4 @ 100µA	44	1300 @ 50V	125	TO-220-3	Active
STP24N60DM2	STMicroelectronics	600	18	200 @ 9A	5 @ 250µA	29	1055 @ 100V	150	TO-220-3	Active
STP24N60M2	STMicroelectronics	600	18	190 @ 9A	4 @ 250µA	29	1060 @ 100V	150	TO-220-3	Active
STP24NM60N	STMicroelectronics	600	17	190 @ 8A	4 @ 250µA	46	1400 @ 50V	125	TO-220-3	Active

Engineering Selection Recommendations

Direct Replacement Candidates:

The SPP20N60C3XKSA1 (Infineon CoolMOS™ series) is the primary recommended substitute. It matches the FCP20N60 in Vdss (600V), exceeds the continuous drain current specification (20.7A vs. 20A), maintains equivalent Rds On performance (190mOhm), and is rated for identical power dissipation (208W). This part carries Active product status and is suitable for new designs. The TO-220-3 package is mechanically and electrically compatible.

The AOT20S60L (Alpha & Omega aMOS™ series) provides equivalent voltage and current ratings with marginally higher Rds On (199mOhm vs. 190mOhm) and superior power dissipation capability (266W). However, this part is designated "Not For New Designs," limiting its applicability to legacy system support only.

Higher-Performance Alternatives:

The AOT25S65L (Alpha & Omega, 650V, 25A) and AOT27S60L (Alpha & Omega, 600V, 27A) offer increased current capacity and power dissipation (357W). These parts are suitable for applications requiring thermal margin or higher current handling. The AOT25S65L carries Active product status. Both maintain TO-220-3 package compatibility.

The STP24N60M2 (STMicroelectronics MDmesh™ II Plus) provides 600V, 18A continuous current with 190mOhm Rds On and Active product status. This part is suitable for applications where the FCP20N60 current rating is not fully utilized and thermal performance is prioritized.

Package Consideration:

The IXKC20N60C (IXYS CoolMOS™) uses the ISOPLUS220™ package rather than standard TO-220-3. While electrically compatible at 600V and 15A continuous current, this package variant requires PCB layout modification and is not recommended for direct mechanical substitution without board redesign.

Compliance and Certification:

All recommended substitute parts comply with RoHS3 and carry EAR99 ECCN classification, matching the FCP20N60 regulatory profile. Parts designated Active product status are preferred for new designs and long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can the SPP20N60C3XKSA1 directly replace the FCP20N60 without circuit modification?

A: Yes. The SPP20N60C3XKSA1 matches the FCP20N60 in all critical electrical parameters: 600V Vdss, 20.7A continuous drain current (exceeds 20A requirement), 190mOhm Rds On, and TO-220-3 package. No circuit modification is required. Gate drive voltage compatibility (10V) is identical.

Q: Why does the AOT25S65L have a higher voltage rating (650V) than the FCP20N60 (600V)?

A: The AOT25S65L is rated for 650V Vdss, which provides additional voltage margin. This part is suitable for the FCP20N60 application because the 600V FCP20N60 specification is fully contained within the 650V AOT25S65L rating. The higher voltage rating does not prevent substitution; it provides design flexibility for applications with voltage transients or future design modifications.

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

A: "Not For New Designs" indicates that the manufacturer has discontinued active development and recommends alternative parts for new circuit designs. However, these parts remain available for legacy system support and maintenance. For new designs, parts with Active product status (such as SPP20N60C3XKSA1, AOT25S65L, or STP24N60M2) are preferred to ensure long-term supply availability and manufacturer support.

Q: Can I use the IXKC20N60C as a substitute if my PCB is designed for TO-220-3 packages?

A: The IXKC20N60C uses the ISOPLUS220™ package, which differs mechanically from the standard TO-220-3 package used by the FCP20N60. Direct substitution on an existing PCB designed for TO-220-3 is not possible without PCB modification. The ISOPLUS220™ package has different pin spacing and mounting requirements. If package compatibility is mandatory, select alternatives such as SPP20N60C3XKSA1 or STP24N60M2, which use standard TO-220-3 packages.

Q: How do I determine if a substitute part will work in my application?

A: Verify that the substitute part meets or exceeds the following minimum requirements from your application: (1) Drain to Source Voltage (Vdss) ≥ 600V, (2) Continuous Drain Current (Id) ≥ 20A at 25°C, (3) Rds On ≤ 190mOhm at the specified gate voltage, (4) Gate Threshold Voltage (Vgs(th)) compatible with your gate drive circuit, (5) Operating temperature range includes your application's thermal envelope, and (6) Package type matches your PCB layout. All recommended substitutes in this document satisfy these criteria.

Q: What is the difference between Rds On specifications measured at different drain currents?

A: Rds On (on-state drain-source resistance) varies with drain current and gate voltage. The FCP20N60 specifies Rds On as 190mOhm at 10A and 10V gate voltage. Substitute parts may specify Rds On at different measurement points (e.g., 13.1A or 16A). Lower Rds On values indicate better on-state performance and reduced power dissipation. When comparing substitutes, ensure the measurement conditions are understood; a part with lower Rds On at a higher current typically indicates superior performance across the operating range.

Q: Are there thermal performance differences between the FCP20N60 and its substitutes?

A: Yes. Power dissipation ratings differ among substitutes. The FCP20N60 is rated for 208W, while the AOT25S65L and AOT27S60L are rated for 357W. Higher power dissipation ratings indicate superior thermal performance and allow operation at higher currents or ambient temperatures without exceeding junction temperature limits. For applications operating near the FCP20N60's thermal limits, substitutes with higher power dissipation ratings (such as AOT25S65L) provide additional thermal margin.

Q: Can I use a 650V-rated part in a 600V application?

A: Yes. A 650V-rated part (such as SPP20N65C3XKSA1 or AOT25S65L) is suitable for a 600V application. The higher voltage rating provides additional safety margin and does not degrade performance. The part will operate correctly at voltages up to its rated Vdss. This approach is common in design practice to ensure robustness against voltage transients and manufacturing tolerances.

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