FQP9N08 Equivalent & Substitute Parts

Part Overview

The FQP9N08 is an N-Channel MOSFET manufactured by onsemi, rated for 80V drain-to-source voltage and 9.3A continuous drain current in a Through Hole TO-220-3 package. This device is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 175°C and is suitable for general-purpose switching applications requiring moderate voltage and current ratings.

Substiute Parts

FQP9N08

onsemiIn Stock: 4488FQP9N08 Datasheet

Current PartRFQ

RCX120N25

Rohm SemiconductorIn Stock: 3983RCX120N25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FQP9N08 is determined by the following critical parameters:

Electrical Compatibility Criteria:

• FET Type: N-Channel topology must be maintained
• Technology: MOSFET (Metal Oxide) construction required
• Drain to Source Voltage (Vdss): Substitute must equal or exceed 80V
• Continuous Drain Current (Id): Substitute must equal or exceed 9.3A at 25°C
• Drive Voltage: Substitute must operate at 10V gate drive
• Maximum Gate Voltage (Vgs): Substitute must accommodate ±25V or greater

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole required
• Package / Case: TO-220-3 or compatible TO-220 variant acceptable

Environmental & Compliance Criteria:

• Operating Temperature: Substitute must support -55°C to 175°C range or equivalent
• Moisture Sensitivity Level: MSL 1 (Unlimited) preferred
• REACH Status: REACH Unaffected or compliant status required

The substitute part RCX120N25 meets these criteria with higher voltage and current ratings, providing design margin while maintaining electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Product Status

The FQP9N08 is classified as obsolete. The RCX120N25 is an active product from Rohm Semiconductor, ensuring ongoing availability, manufacturing support, and compliance with current regulatory standards.

Electrical Performance

The RCX120N25 provides superior electrical specifications compared to the FQP9N08:

• Vdss rating of 250V exceeds the 80V requirement, providing design margin for voltage transients
• Continuous drain current of 12A exceeds the 9.3A requirement
• Gate drive voltage remains at 10V, maintaining circuit compatibility
• Maximum gate voltage of ±30V accommodates the ±25V requirement

Compliance & Regulatory

Both parts maintain identical compliance status:

• REACH Unaffected classification
• EAR99 export control classification
• HTSUS commodity code 8541.29.0095
• MSL 1 (Unlimited) moisture sensitivity rating

Mechanical Compatibility

Both parts utilize Through Hole mounting in TO-220 package variants. The RCX120N25 uses TO-220FM (Full Pack) configuration, which is mechanically compatible with standard TO-220-3 footprints.

Frequently Asked Questions (FAQ)

Q: Can the RCX120N25 directly replace the FQP9N08 in existing designs?

A: Yes. The RCX120N25 meets all electrical and mechanical compatibility requirements. Both parts are N-Channel MOSFETs with 10V gate drive voltage, Through Hole mounting, and TO-220 package compatibility. The higher voltage and current ratings of the RCX120N25 provide design margin without requiring circuit modifications.

Q: What is the primary reason for substitution?

A: The FQP9N08 is obsolete. The RCX120N25 is an active product with ongoing manufacturing support and regulatory compliance, ensuring long-term procurement availability.

Q: Are there differences in gate charge or on-resistance specifications?

A: The FQP9N08 specifies Rds On (Max) of 210 mOhm @ 4.65A, 10V and gate charge of 7.7 nC @ 10V. The RCX120N25 does not provide these specific parameters in the available data. For applications where precise on-resistance or gate charge values are critical, detailed datasheets from Rohm Semiconductor must be consulted.

Q: Is the TO-220FM package compatible with TO-220-3 footprints?

A: Yes. The TO-220FM (Full Pack) is a variant of the standard TO-220-3 package. Both use identical pin configurations and Through Hole mounting, ensuring mechanical and electrical compatibility on standard PCB layouts.

Q: What is the operating temperature range for the RCX120N25?

A: The RCX120N25 specifies a maximum junction temperature (TJ) of 150°C. The FQP9N08 operates to 175°C. For applications requiring operation above 150°C, thermal management or alternative parts must be evaluated.

Q: Are both parts RoHS compliant?

A: The FQP9N08 does not specify RoHS status in the provided data. The RCX120N25 is RoHS3 compliant. For applications requiring RoHS compliance, the RCX120N25 meets this requirement.

Q: What is the inventory status for these parts?

A: The FQP9N08 has 4,380 pieces in stock as new original inventory. The RCX120N25 has 3,900 pieces in stock as new original inventory. Both parts are currently available for procurement.