SFW9640TM P-Channel MOSFET 200V 11A Equivalent & Substitute Parts

Part Overview

The SFW9640TM is a P-Channel MOSFET manufactured by onsemi, rated for 200V drain-to-source voltage and 11A continuous drain current in a D2PAK surface mount package. This device is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging and compliance requirements.

Substiute Parts

SFW9640TM

onsemiIn Stock: 966SFW9640TM Datasheet

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IRF5210STRLPBF

Infineon TechnologiesIn Stock: 36135IRF5210STRLPBF Datasheet

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IRF9640SPBF

Vishay SiliconixIn Stock: 1247IRF9640SPBF Datasheet

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IRF9640STRLPBF

Vishay SiliconixIn Stock: 27977IRF9640STRLPBF Datasheet

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IRF9640STRRPBF

Vishay SiliconixIn Stock: 2200IRF9640STRRPBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFW9640TM is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: The drain-to-source voltage (Vdss) must equal or exceed 200V to ensure safe operation in the original circuit topology.

Current Rating Compatibility: The continuous drain current (Id) must equal or exceed 11A at 25°C to support the same load conditions.

On-Resistance (Rds On): The maximum on-resistance must not significantly exceed 500 mOhm to maintain thermal and efficiency characteristics within acceptable limits.

Gate Threshold Voltage (Vgs(th)): Must remain within 4V at 250µA to ensure compatible gate drive requirements.

Package Compatibility: All substitutes must use the TO-263-3 (D2PAK) surface mount package to maintain PCB layout and thermal management compatibility.

Operating Temperature Range: Must support -55°C to 150°C junction temperature range.

Substitute parts are grouped into two categories based on voltage rating:

Category 1 (Direct Voltage Match - 200V): IRF9640SPBF, IRF9640STRLPBF, and IRF9640STRRPBF maintain the 200V Vdss rating with identical 11A current rating and D2PAK packaging.

Category 2 (Reduced Voltage - 100V): IRF5210STRLPBF operates at 100V Vdss with significantly higher current rating (38A) and reduced on-resistance (60 mOhm). This part is suitable only for applications where the circuit voltage does not exceed 100V.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (200V Applications):

The IRF9640 series from Vishay Siliconix (IRF9640SPBF, IRF9640STRLPBF, IRF9640STRRPBF) provides direct electrical equivalence to the SFW9640TM with identical voltage and current ratings. All three variants are active products with ROHS3 compliance. Selection among these three depends on packaging format requirements:

IRF9640SPBF is supplied in Tube packaging and maintains 1200 units in stock.

IRF9640STRLPBF is supplied in Cut Tape (CT) & Digi-Reel® format with 27900 units in stock, offering the highest availability.

IRF9640STRRPBF is supplied in Tape & Reel (TR) format with 2100 units in stock.

All three IRF9640 variants exhibit slightly lower gate charge (44 nC versus 59 nC) and reduced input capacitance (1200 pF versus 1585 pF), resulting in faster switching characteristics. Maximum gate voltage is reduced to ±20V compared to ±30V on the original part. These differences are within acceptable substitution tolerances for P-Channel MOSFET applications.

For Reduced Voltage Applications (≤100V):

The IRF5210STRLPBF from Infineon Technologies is suitable only for circuits operating at 100V or below. This part offers superior current handling (38A versus 11A) and significantly lower on-resistance (60 mOhm versus 500 mOhm), resulting in reduced power dissipation and improved thermal performance. The IRF5210STRLPBF maintains REACH Unaffected status and is available in Cut Tape & Digi-Reel® format with 36088 units in stock. Higher gate charge (230 nC) and input capacitance (2780 pF) require gate drive circuit evaluation.

Compliance Considerations:

All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating and ECCN EAR99 classification. The IRF9640 series carries REACH Affected status, while IRF5210STRLPBF maintains REACH Unaffected status. Regulatory requirements for the target application determine compliance priority.

Frequently Asked Questions (FAQ)

Q: Can IRF9640SPBF, IRF9640STRLPBF, and IRF9640STRRPBF be used interchangeably with SFW9640TM?

A: Yes, all three IRF9640 variants are electrically equivalent to the SFW9640TM with identical 200V voltage rating and 11A current rating. The differences are packaging format (Tube, Cut Tape & Digi-Reel, or Tape & Reel) and minor variations in gate charge and input capacitance that do not affect functional compatibility in standard P-Channel MOSFET applications.

Q: What is the key limitation of the IRF5210STRLPBF as a substitute?

A: The IRF5210STRLPBF operates at a maximum drain-to-source voltage of 100V, compared to 200V for the SFW9640TM. This part is suitable only for applications where the circuit voltage does not exceed 100V. Using this part in a 200V circuit will result in device failure.

Q: How do the gate charge differences affect circuit design?

A: The IRF9640 series exhibits lower gate charge (44 nC) compared to the SFW9640TM (59 nC), resulting in faster switching transitions. The IRF5210STRLPBF exhibits significantly higher gate charge (230 nC), requiring higher gate drive current or longer switching times. Gate drive circuits should be evaluated to ensure adequate drive capability for the selected substitute.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts (IRF9640SPBF, IRF9640STRLPBF, IRF9640STRRPBF, and IRF5210STRLPBF) are ROHS3 compliant. The original SFW9640TM does not specify RoHS status.

Q: What is the difference between IRF9640STRLPBF and IRF9640STRRPBF?

A: Both parts are electrically identical with 200V voltage rating and 11A current rating. The difference is packaging format: IRF9640STRLPBF is supplied in Cut Tape (CT) & Digi-Reel® format, while IRF9640STRRPBF is supplied in Tape & Reel (TR) format. Selection depends on assembly equipment compatibility and volume requirements.

Q: Can the SFW9640TM be replaced with IRF5210STRLPBF in a 200V application?

A: No. The IRF5210STRLPBF is rated for maximum 100V drain-to-source voltage. Using this part in a 200V circuit exceeds its voltage rating and will result in device failure. The IRF9640 series must be used for 200V applications.

Q: What is the impact of the ±20V maximum gate voltage on the IRF9640 series compared to ±30V on the SFW9640TM?

A: The reduced maximum gate voltage (±20V versus ±30V) on the IRF9640 series requires gate drive circuits to limit voltage to ±20V. Most standard gate drive circuits operate within this range, so this difference typically does not affect compatibility. Circuit design review is necessary if the original design applies gate voltages exceeding ±20V.

Q: Which substitute part offers the best thermal performance?

A: The IRF5210STRLPBF offers the best thermal performance with maximum power dissipation of 170W (Tc) and significantly lower on-resistance (60 mOhm), resulting in reduced power loss. However, this part is limited to 100V applications. For 200V applications, the IRF9640 series offers comparable thermal performance (125W Tc) to the original SFW9640TM (123W Tc).