IRF620 MOSFET N-Channel 200V 6A Equivalent & Substitute Parts

Part Overview

The IRF620 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 200V drain-to-source voltage and 6A continuous drain current in a Through Hole TO-220 package. This device is classified as Obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement.

The IRF620 operates within the PowerMESH™ II series and is suitable for applications requiring moderate voltage and current switching capabilities. Due to its obsolete status, equivalent parts from active product lines provide continuity for system maintenance and new designs requiring similar electrical characteristics.

Substiute Parts

IRF620

STMicroelectronicsIn Stock: 48294IRF620 Datasheet

Current PartRFQ

RCX080N25

Rohm SemiconductorIn Stock: 7926RCX080N25 Datasheet

DirectRFQ

IRF620PBF

Vishay SiliconixIn Stock: 24346IRF620PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRF620 MOSFET is determined by alignment of the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• FET Type: N-Channel topology
• Drain to Source Voltage (Vdss): Minimum 200V rating
• Continuous Drain Current (Id): Minimum 6A at 25°C
• On-State Resistance (Rds On): Maximum 800mOhm or lower
• Gate Threshold Voltage (Vgs(th)): Approximately 4V
• Mounting Type: Through Hole
• Package: TO-220 family variants

Secondary Compatibility Factors:

• Gate Charge (Qg): Lower values improve switching performance
• Power Dissipation: Adequate thermal handling capability
• Operating Temperature Range: Support for -65°C to 150°C minimum
• RoHS3 Compliance: Environmental and regulatory alignment

Substitute parts must maintain electrical equivalence within the specified parameter ranges to ensure functional compatibility in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

RCX080N25 (Direct Substitute - Rohm Semiconductor)

The RCX080N25 qualifies as a direct substitute for the IRF620. This device exceeds the primary electrical requirements with 250V Vdss rating, 8A continuous drain current, and improved on-state resistance of 600mOhm. The RCX080N25 is in Active product status, ensuring long-term availability and supply chain continuity. RoHS3 compliance and REACH Unaffected status align with the original part's regulatory profile. The TO-220-3 Full Pack variant maintains mechanical compatibility with existing PCB layouts. Lower gate charge (15nC) provides improved switching efficiency compared to the IRF620.

IRF620PBF (Similar Substitute - Vishay Siliconix)

The IRF620PBF serves as a similar substitute, maintaining identical Vdss (200V) and equivalent Rds On characteristics (800mOhm). Continuous drain current is rated at 5.2A, slightly below the IRF620's 6A specification. This device is in Active product status and packaged in TO-220AB, compatible with TO-220-3 footprints. RoHS3 compliance is confirmed; however, REACH Status is listed as Affected, requiring regulatory verification for specific applications. Operating temperature range extends to -55°C minimum, slightly narrower than the IRF620's -65°C specification. Lower gate charge (14nC) and reduced input capacitance (260pF) offer switching performance advantages.

Selection Basis:

• RCX080N25 is recommended for applications requiring maximum performance margin and long-term supply assurance due to Active status and superior electrical ratings.
• IRF620PBF is suitable for direct pin-compatible replacement where voltage and current requirements align with the 5.2A rating and REACH compliance is not a constraint.

Both substitutes maintain Through Hole mounting and TO-220 package compatibility, ensuring mechanical interchangeability without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the RCX080N25 replace the IRF620 in all applications?

A: The RCX080N25 meets or exceeds all primary electrical parameters of the IRF620 (Vdss, Id, Rds On). Mechanical compatibility is confirmed through TO-220-3 package alignment. Applications operating at or below 200V and 6A are fully supported. The higher voltage rating (250V) and current capacity (8A) provide design margin without functional compromise.

Q: What is the difference between IRF620PBF and RCX080N25?

A: IRF620PBF maintains the original IRF620 voltage rating (200V) and on-state resistance (800mOhm), making it a direct electrical equivalent with slightly reduced current capacity (5.2A vs. 6A). RCX080N25 offers enhanced specifications with 250V rating, 8A current, and lower on-state resistance (600mOhm), providing superior performance margin. Both are mechanically compatible with TO-220 footprints.

Q: Are there package compatibility concerns between TO-220AB and TO-220-3 Full Pack?

A: Both TO-220AB and TO-220-3 Full Pack variants are Through Hole packages with identical pin configurations and PCB footprints. The "Full Pack" designation refers to packaging format (bulk vs. tube) and does not affect electrical or mechanical compatibility. Direct PCB substitution is supported without layout modification.

Q: What is the significance of the Gate Charge (Qg) difference between these parts?

A: Gate Charge represents the total charge required to switch the MOSFET from off to on state. The IRF620 requires 27nC, while RCX080N25 requires 15nC and IRF620PBF requires 14nC. Lower gate charge reduces switching losses and improves efficiency in high-frequency applications. This is a performance advantage in substitute parts and does not create compatibility issues.

Q: Does the higher Input Capacitance (Ciss) of RCX080N25 affect circuit performance?

A: The RCX080N25 has higher input capacitance (840pF vs. 350pF in IRF620) due to its higher current rating. This increases gate drive requirements and switching transition time. In low-frequency applications or circuits with robust gate drive capability, this difference is not limiting. High-frequency switching circuits should evaluate gate drive current capacity to confirm adequate performance.

Q: Why is the IRF620 classified as Obsolete?

A: Obsolete status indicates the IRF620 is no longer manufactured by STMicroelectronics and is not available through standard distribution channels. Existing inventory may be available from secondary sources. Active substitute parts (RCX080N25 and IRF620PBF) ensure design continuity and long-term supply availability for new and legacy applications.

Q: Are all three parts RoHS3 compliant?

A: Yes, IRF620, RCX080N25, and IRF620PBF are all RoHS3 compliant. This certification confirms compliance with restrictions on hazardous substances in electrical and electronic equipment. REACH status varies: IRF620 and RCX080N25 are REACH Unaffected, while IRF620PBF is REACH Affected. Applications subject to REACH regulations should confirm compliance requirements with the specific substitute part selected.

Q: What is the operating temperature range difference between IRF620 and IRF620PBF?

A: IRF620 operates from -65°C to 150°C (TJ), while IRF620PBF operates from -55°C to 150°C (TJ). The IRF620PBF has a 10°C higher minimum operating temperature. Applications requiring operation below -55°C must use the original IRF620 or RCX080N25. For standard industrial and commercial temperature ranges, this difference is not limiting.