FDPF18N20FT N-Channel MOSFET 200V 18A Equivalent & Substitute Parts

Part Overview

The FDPF18N20FT 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 part of the UniFET™ series and maintains Active product status. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to support design flexibility, inventory optimization, and supply chain continuity.

Substiute Parts

FDPF18N20FT

onsemiIn Stock: 15320FDPF18N20FT Datasheet

Current PartRFQ

RCX200N20

Rohm SemiconductorIn Stock: 1201RCX200N20 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are identified based on the following critical parameters that determine functional equivalence:

Electrical Matching Criteria:

• Drain to Source Voltage (Vdss): 200V (exact match required)
• FET Type: N-Channel (exact match required)
• Technology: MOSFET (Metal Oxide) (exact match required)
• Drive Voltage: 10V (exact match required)
• Gate-Source Voltage (Vgs) Maximum: ±30V (exact match required)
• Operating Temperature Range: Minimum -55°C to maximum 150°C (exact match required)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole (exact match required)
• Package / Case: TO-220-3 Full Pack (exact match required)

Performance Tolerance Criteria:

• Continuous Drain Current (Id): Equal to or greater than 18A
• Rds On (Max): Equal to or less than 140mOhm
• Gate Charge (Qg): Equal to or less than 26nC
• Input Capacitance (Ciss): Equal to or less than 1180pF
• Power Dissipation (Max): Equal to or greater than 41W

The RCX200N20 meets all electrical and mechanical matching criteria and satisfies all performance tolerance requirements.

Parameter Comparison

Engineering Selection Recommendations

FDPF18N20FT (onsemi) - Primary Selection

The FDPF18N20FT is the specified component with Active product status. It is ROHS3 Compliant and REACH Unaffected. Current inventory is 15,265 pieces. This part is suitable for applications requiring the specified electrical and thermal characteristics within the defined operating temperature range.

RCX200N20 (Rohm Semiconductor) - Substitute Selection

The RCX200N20 is functionally equivalent and mechanically compatible. It is ROHS3 Compliant and REACH Unaffected with Active product status. The substitute part exceeds the primary part in continuous drain current (20A vs. 18A), on-resistance performance (130mOhm vs. 140mOhm), and power dissipation capability (40W vs. 41W). Gate charge and input capacitance are higher in the substitute part. Current inventory is 1,156 pieces. This part is suitable for direct substitution in circuit designs where the primary part is unavailable or where the enhanced current and on-resistance specifications provide design margin.

Both parts are compliant with applicable regulatory standards and are suitable for production use.

Frequently Asked Questions (FAQ)

Q: Can the RCX200N20 be used as a direct replacement for the FDPF18N20FT?

A: Yes. Both parts share identical drain-to-source voltage (200V), gate-source voltage rating (±30V), drive voltage (10V), package type (TO-220-3), and mounting configuration (Through Hole). The RCX200N20 meets or exceeds the electrical performance requirements of the FDPF18N20FT.

Q: What are the key differences between these two parts?

A: The RCX200N20 provides higher continuous drain current (20A vs. 18A), lower on-resistance (130mOhm vs. 140mOhm), and comparable power dissipation (40W vs. 41W). The RCX200N20 has higher gate charge (40nC vs. 26nC) and input capacitance (1900pF vs. 1180pF). These differences may affect switching speed and gate drive requirements in specific circuit topologies.

Q: Are both parts available in the same package?

A: Yes. Both the FDPF18N20FT and RCX200N20 are supplied in TO-220-3 Full Pack configuration with Through Hole mounting. PCB layout and thermal management considerations remain consistent between the two parts.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both parts are ROHS3 Compliant and REACH Unaffected. Both carry Active product status and are suitable for production applications.

Q: What should be considered when switching from the FDPF18N20FT to the RCX200N20?

A: Circuit designs should account for the higher gate charge (40nC vs. 26nC) and input capacitance (1900pF vs. 1180pF) of the RCX200N20. Gate drive circuits may require adjustment to accommodate the increased capacitive loading. The lower on-resistance and higher current rating of the RCX200N20 provide improved thermal performance and may reduce power dissipation in the application.

Q: What is the operating temperature range for each part?

A: The FDPF18N20FT operates from -55°C to 150°C (TJ). The RCX200N20 is specified to 150°C (TJ). Applications requiring operation below 0°C should use the FDPF18N20FT.