FDZ191P Equivalent & Substitute Parts

Part Overview

The FDZ191P is a P-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 3A continuous drain current at 25°C. This device is housed in a 6-WLCSP (1x1.5) surface mount package and is part of the PowerTrench® series. The FDZ191P is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement planning.

Substiute Parts

FDZ191P

onsemiIn Stock: 27220FDZ191P Datasheet

Current PartRFQ

PMCM4402UPEZ

Nexperia USA Inc.In Stock: 17191PMCM4402UPEZ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDZ191P 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): Minimum 20V rating required
• Continuous Drain Current (Id): Minimum 3A at 25°C required
• Gate-Source Voltage (Vgs): ±8V maximum rating required
• Operating Temperature Range: Must support -55°C to 150°C (TJ)

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount only
• Package Type: WLCSP (Wafer Level Chip Scale Package) variants acceptable

Regulatory Compliance:

• RoHS3 Compliant status required
• REACH Unaffected status required

The PMCM4402UPEZ from Nexperia USA Inc. meets these substitution criteria with equivalent voltage ratings, superior current handling (4.2A vs. 3A), and compatible surface mount packaging in WLCSP format.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PMCM4402UPEZ

The PMCM4402UPEZ is a direct functional substitute for the obsolete FDZ191P. Both devices are P-Channel MOSFETs with identical 20V Vdss ratings and ±8V Vgs maximum specifications. The PMCM4402UPEZ provides superior continuous drain current capability (4.2A versus 3A), making it suitable for applications requiring equal or greater current handling than the original FDZ191P design.

Regulatory Compliance: Both the FDZ191P and PMCM4402UPEZ maintain ROHS3 compliance and REACH Unaffected status, ensuring compatibility with current environmental and regulatory requirements.

Product Status Consideration: Both parts are classified as obsolete. Selection of the PMCM4402UPEZ should be accompanied by long-term supply chain planning and inventory assessment.

Package Consideration: The FDZ191P uses a 6-WLCSP (1x1.5) package, while the PMCM4402UPEZ uses a 4-WLCSP (0.78x0.78) package. Both are WLCSP variants suitable for surface mount assembly. PCB layout modifications may be required to accommodate the different package footprints and pin configurations.

Frequently Asked Questions (FAQ)

Q: Can the PMCM4402UPEZ directly replace the FDZ191P without circuit modifications?

A: The PMCM4402UPEZ is electrically compatible with the FDZ191P for voltage and current specifications. However, the different WLCSP package sizes (6-WLCSP versus 4-WLCSP) and pin configurations require PCB layout redesign. Gate drive circuitry and thermal management considerations must be evaluated based on specific application requirements.

Q: What are the key electrical parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: (1) P-Channel FET topology, (2) minimum 20V Vdss rating, (3) minimum 3A continuous drain current capability, (4) ±8V Vgs maximum rating, and (5) operating temperature range compatibility. The PMCM4402UPEZ meets all these criteria.

Q: Are there differences in gate charge between these devices?

A: Yes. The FDZ191P specifies 13 nC gate charge at 10V, while the PMCM4402UPEZ specifies 6.2 nC gate charge at 4.5V. Lower gate charge in the substitute part may result in faster switching characteristics and reduced gate drive power requirements.

Q: What is the significance of the different power dissipation ratings?

A: The FDZ191P is rated for 1.9W maximum power dissipation, while the PMCM4402UPEZ is rated for 400mW. The substitute part's lower power dissipation rating reflects its smaller package size. Thermal management and application-specific power calculations must be performed to ensure the substitute part operates within acceptable thermal limits.

Q: Are both parts suitable for new designs?

A: Both the FDZ191P and PMCM4402UPEZ are classified as obsolete. Neither part is recommended for new designs. Current production alternatives from onsemi and Nexperia should be evaluated for new product development.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and use.