FQPF18N20V2 N-Channel MOSFET 200V 18A Equivalent & Substitute Parts

Part Overview

The FQPF18N20V2 is an N-Channel MOSFET manufactured by onsemi, rated for 200V drain-to-source voltage and 18A continuous drain current in a Through Hole TO-220F-3 package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 150°C and dissipates up to 40W at the case temperature (Tc).

Substiute Parts

FQPF18N20V2

onsemiIn Stock: 2371FQPF18N20V2 Datasheet

Current PartRFQ

RCX200N20

Rohm SemiconductorIn Stock: 1201RCX200N20 Datasheet

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STF19NF20

STMicroelectronicsIn Stock: 1269STF19NF20 Datasheet

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STF20NF20

STMicroelectronicsIn Stock: 15162STF20NF20 Datasheet

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STP20NF20

STMicroelectronicsIn Stock: 2087STP20NF20 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FQPF18N20V2 is determined by the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Drain-to-Source Voltage (Vdss): 200V minimum
• Continuous Drain Current (Id): 18A or greater at 25°C
• On-State Resistance (Rds On): Comparable or lower values at rated conditions
• Package Type: Through Hole TO-220 family (TO-220F-3, TO-220FM, TO-220FP, TO-220AB)
• FET Type: N-Channel MOSFET technology
• Gate Voltage Rating (Vgs Max): ±20V or ±30V

Secondary Compatibility Factors:

• Gate Threshold Voltage (Vgs(th)): 4V to 5V range
• Gate Charge (Qg): Values between 24 nC and 40 nC
• Input Capacitance (Ciss): 800 pF to 1900 pF range
• Operating Temperature: Minimum -55°C to 150°C overlap

All substitute parts listed meet or exceed the primary electrical specifications of the FQPF18N20V2 while maintaining mechanical compatibility through standard TO-220 through-hole mounting.

Parameter Comparison

Engineering Selection Recommendations

RCX200N20 (Rohm Semiconductor)

The RCX200N20 is an active product offering improved drain current (20A) and lower on-state resistance (130 mOhm) compared to the FQPF18N20V2. It maintains identical voltage ratings (200V Vdss, ±30V Vgs) and equivalent power dissipation (40W Tc). The TO-220FM package is mechanically compatible with TO-220F-3 mounting. This part is ROHS3 compliant and carries active product status, ensuring long-term availability. Inventory of 1156 units is available.

STF20NF20 (STMicroelectronics)

The STF20NF20 provides an exact match in continuous drain current (18A) and on-state resistance (125 mOhm), with superior thermal performance (30W Tc) and extended operating temperature range (-55°C to 175°C). The TO-220FP package is mechanically compatible. This part is ROHS3 compliant with active product status. Gate charge is higher (39 nC) and gate voltage is limited to ±20V. Inventory of 15126 units is available, providing strong supply continuity.

STP20NF20 (STMicroelectronics)

The STP20NF20 matches the FQPF18N20V2 in continuous drain current (18A) and on-state resistance (125 mOhm) with significantly enhanced power dissipation capability (110W Tc). The TO-220AB package is mechanically compatible with standard TO-220 mounting. This part is ROHS3 compliant with active product status and extended operating temperature range (-55°C to 175°C). Gate voltage is limited to ±20V. Inventory of 2003 units is available.

STF19NF20 (STMicroelectronics)

The STF19NF20 provides reduced continuous drain current (15A) and higher on-state resistance (160 mOhm) compared to the FQPF18N20V2, with lower power dissipation (25W Tc). The TO-220FP package is mechanically compatible. This part is suitable for applications with lower current requirements. ROHS3 compliant with active product status. Inventory of 1248 units is available.

All substitute parts are REACH Unaffected and classified under ECCN EAR99 with HTSUS code 8541.29.0095, matching the regulatory classification of the original part.

Frequently Asked Questions (FAQ)

Q: Can the RCX200N20 directly replace the FQPF18N20V2 in all applications?

A: The RCX200N20 is electrically compatible for applications requiring 200V, 18A or less continuous drain current. Both parts maintain ±30V gate voltage ratings and 40W power dissipation at case temperature. The TO-220FM package is mechanically compatible with TO-220F-3 mounting. Verify PCB layout accommodates the package variant.

Q: What is the primary difference between STF20NF20 and STP20NF20?

A: Both parts provide identical electrical performance (18A, 125 mOhm Rds On, 200V Vdss). The key difference is power dissipation: STF20NF20 dissipates 30W at case temperature in TO-220FP package, while STP20NF20 dissipates 110W at case temperature in TO-220AB package. STP20NF20 is suitable for high-power applications requiring enhanced thermal management.

Q: Why does STF19NF20 have lower current rating than the FQPF18N20V2?

A: The STF19NF20 is rated for 15A continuous drain current, which is 3A lower than the FQPF18N20V2 (18A). This part is suitable for applications with reduced current requirements. For applications requiring 18A or higher, use RCX200N20, STF20NF20, or STP20NF20.

Q: Are all substitute parts RoHS compliant?

A: Yes. RCX200N20 is ROHS3 compliant. STF19NF20, STF20NF20, and STP20NF20 are all ROHS3 compliant. The original FQPF18N20V2 does not specify RoHS status.

Q: What is the impact of gate voltage rating differences?

A: The FQPF18N20V2 and RCX200N20 are rated for ±30V gate voltage. STF19NF20, STF20NF20, and STP20NF20 are rated for ±20V gate voltage. Applications using gate drive circuits exceeding ±20V must use RCX200N20 or verify gate drive compatibility with the ±20V limit.

Q: How do gate charge differences affect circuit design?

A: Gate charge (Qg) ranges from 24 nC to 40 nC across all parts. Lower gate charge (STF19NF20 at 24 nC, FQPF18N20V2 at 26 nC) results in faster switching and lower gate drive power. Higher gate charge (RCX200N20 at 40 nC, STF20NF20 and STP20NF20 at 39 nC) requires higher gate drive current. Verify gate driver capability for the selected part.

Q: What is the significance of input capacitance (Ciss) variation?

A: Input capacitance ranges from 800 pF to 1900 pF. Lower capacitance (STF19NF20 at 800 pF) enables faster switching transitions and reduces gate drive power. Higher capacitance (RCX200N20 at 1900 pF) may require stronger gate drive circuits. Select based on switching frequency and gate driver specifications.

Q: Are all parts available in the same package?

A: No. FQPF18N20V2 uses TO-220F-3, RCX200N20 uses TO-220FM, STF19NF20 and STF20NF20 use TO-220FP, and STP20NF20 uses TO-220AB. All are through-hole TO-220 family packages with compatible pin configurations and mounting footprints, but physical dimensions vary slightly. Verify PCB layout compatibility.

Q: Which substitute part offers the best thermal performance?

A: STP20NF20 offers the highest power dissipation rating at 110W (Tc), making it suitable for high-power applications. STF20NF20 provides 30W (Tc), and RCX200N20 provides 40W (Tc). Selection depends on thermal management requirements and application power levels.

Q: What is the operating temperature range consideration?

A: FQPF18N20V2 and STF19NF20 operate from -55°C to 150°C. STF20NF20 and STP20NF20 extend to -55°C to 175°C. RCX200N20 specifies only to 150°C. For applications requiring operation above 150°C, use STF20NF20 or STP20NF20.