STP16NS25FP N-Channel MOSFET 250V 16A Equivalent & Substitute Parts

Part Overview

The STP16NS25FP is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 250V drain-to-source voltage and 16A continuous drain current in a Through Hole TO-220FP package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, and thermal characteristics while accommodating available packaging options.

Substiute Parts

STP16NS25FP

STMicroelectronicsIn Stock: 3380STP16NS25FP Datasheet

Current PartRFQ

FQPF9N25CT

onsemiIn Stock: 1102FQPF9N25CT Datasheet

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FQPF9N25CYDTU

Fairchild SemiconductorIn Stock: 9966FQPF9N25CYDTU Datasheet

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IRFI634GPBF

Vishay SiliconixIn Stock: 18415IRFI634GPBF Datasheet

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IRFI644GPBF

Vishay SiliconixIn Stock: 1719IRFI644GPBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STP16NS25FP is determined by the following critical electrical and mechanical parameters:

Mandatory Matching Criteria:

• Drain to Source Voltage (Vdss): 250V minimum
• FET Type: N-Channel
• Technology: MOSFET (Metal Oxide)
• Mounting Type: Through Hole
• Package Family: TO-220 series

Performance Considerations:

• Continuous Drain Current (Id): Substitute parts must support the application's current requirements
• Power Dissipation: Thermal capacity must be adequate for the intended circuit
• Rds On: On-state resistance affects efficiency and heat generation
• Gate Threshold Voltage: Must be compatible with drive circuitry
• Operating Temperature Range: Must encompass application environment

Compliance Requirements:

• RoHS3 Compliance: All substitutes must maintain regulatory compliance
• REACH Status: Unaffected for all listed alternatives

The substitute parts listed below satisfy the 250V voltage rating and N-Channel MOSFET topology. Current ratings vary from 5.6A to 8.8A, requiring application-level assessment for suitability in designs originally specified for 16A operation.

Parameter Comparison

Engineering Selection Recommendations

Active Product Status Priority:

FQPF9N25CYDTU (Fairchild Semiconductor) and IRFI644GPBF (Vishay Siliconix) are classified as Active products, ensuring long-term availability and continued manufacturing support. FQPF9N25CT and STP16NS25FP are both obsolete, limiting their suitability for new designs requiring extended product lifecycles.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, consistent with the original STP16NS25FP. IRFI634GPBF and IRFI644GPBF carry explicit ROHS3 Compliant certification with MSL Level 1 (Unlimited), indicating robust moisture handling characteristics suitable for standard manufacturing environments.

Current Rating Considerations:

The STP16NS25FP supports 16A continuous drain current. Substitute parts provide reduced current ratings: IRFI634GPBF (5.6A), IRFI644GPBF (7.9A), and both FQPF variants (8.8A). Selection must align with actual circuit current requirements. Applications requiring the full 16A specification cannot be directly substituted without circuit redesign or parallel device configuration.

Thermal and Electrical Performance:

IRFI644GPBF matches the 40W power dissipation rating of the original part and maintains identical 280 mOhm Rds On specification, providing equivalent thermal and conduction characteristics. FQPF9N25CYDTU offers 38W dissipation with 430 mOhm Rds On, suitable for lower-current applications with acceptable efficiency trade-offs.

Package Compatibility:

All substitute parts utilize TO-220-3 Through Hole packaging, maintaining mechanical compatibility with existing PCB layouts. IRFI634GPBF and IRFI644GPBF feature isolated tabs, while FQPF9N25CYDTU includes formed leads for automated insertion processes.

Frequently Asked Questions (FAQ)

Q: Can IRFI634GPBF directly replace STP16NS25FP in all applications?

A: IRFI634GPBF maintains the 250V voltage rating and N-Channel MOSFET topology. However, its 5.6A continuous drain current rating is significantly lower than the original 16A specification. Direct substitution is limited to applications where circuit current requirements do not exceed 5.6A. Higher-current designs require alternative solutions or circuit modification.

Q: What is the difference between FQPF9N25CT and FQPF9N25CYDTU?

A: Both parts are electrically identical with 250V rating, 8.8A current, and 430 mOhm Rds On. The primary difference is packaging: FQPF9N25CT uses standard TO-220F-3 leads, while FQPF9N25CYDTU features Y-Forming leads for automated insertion equipment. FQPF9N25CYDTU is Active status; FQPF9N25CT is Obsolete.

Q: Why does IRFI644GPBF have an isolated tab while other TO-220 parts do not?

A: The isolated tab on IRFI644GPBF provides electrical isolation between the drain connection and the mounting tab, enabling independent thermal management without electrical coupling to the substrate. Standard TO-220 packages connect the tab directly to the drain. Application requirements determine which configuration is appropriate.

Q: Are all substitute parts RoHS3 compliant?

A: IRFI634GPBF, IRFI644GPBF, and FQPF9N25CT carry explicit ROHS3 Compliant certification. FQPF9N25CYDTU does not specify RoHS status in the provided data. Verification with the manufacturer is required for regulatory compliance confirmation in applications subject to RoHS requirements.

Q: What is the minimum operating temperature difference between the main part and substitutes?

A: STP16NS25FP operates from -65°C to 150°C. All substitute parts operate from -55°C to 150°C, representing a 10°C reduction in minimum operating temperature. Applications requiring operation below -55°C cannot use these substitutes.

Q: Can multiple lower-current substitute parts be paralleled to achieve 16A operation?

A: Parallel MOSFET configurations require careful gate drive matching, current balancing networks, and thermal management to ensure equal current distribution. This approach is outside the scope of direct substitution and requires detailed circuit design analysis.

Q: What inventory status should influence substitution decisions?

A: FQPF9N25CYDTU offers the highest inventory availability (9,900 pcs), followed by IRFI634GPBF (18,399 pcs). IRFI644GPBF has limited inventory (1,700 pcs). For applications requiring long-term supply assurance, FQPF9N25CYDTU combined with its Active product status provides the strongest procurement foundation.