MMSF3P02HDR2G P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The MMSF3P02HDR2G is a P-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 5.6A continuous drain current. This device is packaged in an 8-SOIC surface mount configuration and is currently classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MMSF3P02HDR2G
Manufacturer	onsemi
FET Type	P-Channel
Drain to Source Voltage (Vdss)	20 V
Current - Continuous Drain (Id) @ 25°C	5.6A (Ta)
Rds On (Max) @ Id, Vgs	75mOhm @ 3A, 10V
Vgs(th) (Max) @ Id	2V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	46 nC @ 10 V
Input Capacitance (Ciss) (Max) @ Vds	1400 pF @ 16 V
Power Dissipation (Max)	2.5W (Ta)
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MMSF3P02HDR2G is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

FET Type: P-Channel topology must be maintained
Drain to Source Voltage (Vdss): Substitute must equal or exceed 20V rating
Continuous Drain Current (Id): Substitute must support minimum 5.6A at 25°C
On-Resistance (Rds On): Substitute performance must be compatible with circuit requirements
Gate Threshold Voltage (Vgs(th)): Must fall within acceptable switching characteristics
Operating Temperature Range: Must support -55°C to 150°C (TJ)

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount required
Package Configuration: 8-SOIC pinout compatibility essential
Pin Assignment: Drain, Gate, and Source pin positions must align with original device

The ZXMP3A16N8TA from Diodes Incorporated qualifies as a substitute based on matching P-Channel topology, exceeding the 20V Vdss requirement (30V rating), maintaining 5.6A continuous drain current capability, and utilizing the same 8-SOIC package footprint with compatible pinout.

Parameter Comparison

Parameter	MMSF3P02HDR2G (onsemi)	ZXMP3A16N8TA (Diodes Inc.)	Compatibility Notes
FET Type	P-Channel	P-Channel	Matched
Drain to Source Voltage (Vdss)	20 V	30 V	Substitute rated higher; suitable for 20V applications
Current - Continuous Drain (Id) @ 25°C	5.6A (Ta)	5.6A (Ta)	Matched
Rds On (Max) @ Id, Vgs	75mOhm @ 3A, 10V	40mOhm @ 4.2A, 10V	Substitute exhibits lower on-resistance; improved performance
Vgs(th) (Max) @ Id	2V @ 250µA	1V @ 250µA	Substitute has lower threshold voltage; faster switching response
Gate Charge (Qg) (Max) @ Vgs	46 nC @ 10 V	29.6 nC @ 10 V	Substitute requires less gate charge; reduced driver requirements
Input Capacitance (Ciss) (Max) @ Vds	1400 pF @ 16 V	1022 pF @ 15 V	Substitute has lower input capacitance; improved switching speed
Power Dissipation (Max)	2.5W (Ta)	1.9W (Ta)	Substitute rated lower; thermal performance consideration
Operating Temperature Range	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	Matched
Mounting Type	Surface Mount	Surface Mount	Matched
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	Matched; direct footprint compatibility
Vgs (Max)	±20V	±20V	Matched
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Matched
Product Status	Obsolete	Active	Substitute is currently in active production

Engineering Selection Recommendations

Primary Substitute: ZXMP3A16N8TA

The ZXMP3A16N8TA is the qualified substitute for the obsolete MMSF3P02HDR2G based on the following engineering criteria:

Electrical Performance: The substitute maintains identical continuous drain current (5.6A) and operating temperature range (-55°C to 150°C). The higher Vdss rating (30V versus 20V) provides additional voltage margin for the original 20V application. Improved electrical characteristics including lower on-resistance (40mOhm versus 75mOhm), reduced gate charge (29.6nC versus 46nC), and lower input capacitance (1022pF versus 1400pF) result in enhanced switching efficiency and reduced driver power requirements.

Mechanical Compatibility: Both devices utilize identical 8-SOIC surface mount packaging with matching 0.154" (3.90mm) width specifications. Pin configuration and footprint are directly compatible, enabling drop-in replacement without PCB redesign.

Compliance and Availability: The ZXMP3A16N8TA is ROHS3 compliant and REACH unaffected, matching the regulatory status of the original part. Active production status ensures long-term component availability, addressing the obsolescence issue of the MMSF3P02HDR2G.

Thermal Considerations: The substitute is rated for 1.9W maximum power dissipation compared to 2.5W for the original device. Circuit thermal analysis is required to confirm adequate heat dissipation in applications approaching maximum power levels.

Frequently Asked Questions (FAQ)

Q: Can the ZXMP3A16N8TA directly replace the MMSF3P02HDR2G without circuit modifications?

A: Yes, the ZXMP3A16N8TA is a direct replacement for the MMSF3P02HDR2G in terms of pinout and package footprint. Both devices are housed in 8-SOIC packages with identical physical dimensions and pin assignments. No PCB modifications are required for mechanical and electrical interface compatibility.

Q: What are the key electrical differences between these two devices?

A: The primary differences are: (1) Vdss rating is 30V for the substitute versus 20V for the original, providing additional voltage headroom; (2) On-resistance is lower (40mOhm versus 75mOhm), resulting in reduced power dissipation; (3) Gate charge is reduced (29.6nC versus 46nC), requiring less driver current; (4) Input capacitance is lower (1022pF versus 1400pF), enabling faster switching transitions. These differences represent performance improvements suitable for the original 20V application.

Q: Are there any thermal design considerations when substituting the ZXMP3A16N8TA?

A: The substitute has a lower maximum power dissipation rating (1.9W versus 2.5W). Applications operating near maximum power levels should be evaluated to ensure the substitute's thermal rating is adequate. The improved on-resistance of the substitute typically results in lower actual power dissipation, but thermal analysis specific to your circuit is recommended for high-power applications.

Q: Do both devices have the same regulatory compliance status?

A: Yes, both the MMSF3P02HDR2G and ZXMP3A16N8TA are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is identical at MSL 1 (Unlimited) for both devices. Regulatory requirements are fully maintained with the substitute.

Q: What is the primary reason for substituting the MMSF3P02HDR2G?

A: The MMSF3P02HDR2G is classified as obsolete, meaning onsemi has discontinued production. The ZXMP3A16N8TA from Diodes Incorporated is an active product with ongoing production and availability, ensuring long-term component supply for new designs and production requirements.

Q: How do the gate threshold voltages compare, and does this affect circuit operation?

A: The ZXMP3A16N8TA has a lower gate threshold voltage (1V @ 250µA) compared to the MMSF3P02HDR2G (2V @ 250µA). This lower threshold enables faster switching response and may reduce gate driver power requirements. For most applications, this represents an improvement; however, circuits with marginal gate drive voltage should be evaluated to confirm adequate switching performance.

Q: Are the package dimensions identical between these two devices?

A: Yes, both devices are packaged in 8-SOIC with identical dimensions of 0.154" (3.90mm) width. The physical footprint is identical, enabling direct PCB compatibility without layout modifications.

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