FDWS86068-F085 Equivalent & Substitute Parts

Part Overview

The FDWS86068-F085 is an N-Channel 100V 80A surface mount MOSFET manufactured by onsemi, part of the PowerTrench® series. This device is designed for high-current switching applications requiring robust thermal performance and automotive-grade reliability. The part is currently Active in product status with full AEC-Q101 automotive qualification.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across different manufacturer offerings. The FDWS86068-F085 operates within specific parameter windows that define acceptable alternatives in the N-Channel MOSFET category.

Substiute Parts

FDWS86068-F085

onsemiIn Stock: 1199FDWS86068-F085 Datasheet

Current PartRFQ

CSD19531Q5A

Texas InstrumentsIn Stock: 25335CSD19531Q5A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDWS86068-F085 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Drain to Source Voltage (Vdss) must equal or exceed 100V
• Continuous Drain Current (Id) must meet or exceed 80A at 25°C
• On-state resistance (Rds On) must not exceed 6.4 mOhm at rated current and gate voltage
• Gate threshold voltage (Vgs(th)) must fall within acceptable switching range
• Maximum gate voltage (Vgs) must support ±20V operation
• Operating temperature range must encompass -55°C to 150°C

Mechanical & Regulatory Equivalence Criteria:

• Surface mount technology required
• Package footprint compatibility with 8-pin DFN form factor
• RoHS3 compliance mandatory
• Moisture Sensitivity Level 1 (Unlimited) required
• Active product status with current manufacturer support

The CSD19531Q5A from Texas Instruments meets these substitution criteria through equivalent voltage rating, superior current rating, matching on-state resistance specification, compatible gate characteristics, and identical regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

FDWS86068-F085 (Primary Selection)

The FDWS86068-F085 remains the primary component choice when onsemi PowerTrench® series qualification is required or when existing supply chain relationships with onsemi are established. This device carries AEC-Q101 automotive qualification and is actively supported by the manufacturer. The part is available in high inventory (1090 pcs) and packaged in Tape & Reel format suitable for automated assembly.

CSD19531Q5A (Substitute Selection)

The CSD19531Q5A from Texas Instruments serves as a direct functional substitute when supply constraints affect FDWS86068-F085 availability or when NexFET™ series integration is preferred. This device exceeds the current rating specification (100A vs. 80A) while maintaining identical on-state resistance and voltage ratings. The CSD19531Q5A is ROHS3 compliant, carries MSL 1 rating, and operates across the full -55°C to 150°C temperature range. Significantly higher inventory availability (25300 pcs) supports rapid procurement. Both devices are Active in product status with current manufacturer support.

Regulatory & Compliance Alignment

Both parts maintain ROHS3 compliance, REACH Unaffected status, and identical ECCN/HTSUS classifications. Moisture sensitivity levels are equivalent at MSL 1 (Unlimited), eliminating special handling requirements during assembly and storage.

Frequently Asked Questions (FAQ)

Q: Can the CSD19531Q5A directly replace the FDWS86068-F085 in existing PCB designs?

A: The CSD19531Q5A is mechanically and electrically compatible with the FDWS86068-F085 in the 8-PowerTDFN package footprint. Both devices share identical pin configurations, voltage ratings, and on-state resistance specifications. PCB layout modifications are not required for substitution.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer origin (onsemi vs. Texas Instruments) and continuous drain current rating (80A vs. 100A). The CSD19531Q5A provides higher current capacity while maintaining equivalent on-state resistance. Gate threshold voltage differs slightly (4V vs. 3.3V), and input capacitance is higher in the CSD19531Q5A (3870 pF vs. 2220 pF). These differences do not prevent functional substitution in applications designed for the FDWS86068-F085.

Q: Are there packaging differences between these parts?

A: Both parts use 8-pin PowerTDFN surface mount packages. The FDWS86068-F085 is supplied in Tape & Reel format, while the CSD19531Q5A is available in Cut Tape and Digi-Reel® formats. All packaging options are suitable for automated assembly processes.

Q: Do both parts meet automotive qualification requirements?

A: The FDWS86068-F085 carries explicit AEC-Q101 automotive qualification. The CSD19531Q5A is ROHS3 compliant and operates across automotive temperature ranges (-55°C to 150°C) but does not carry stated AEC-Q101 designation in the provided specifications. Automotive application requirements should be verified against specific qualification documentation.

Q: What is the impact of higher gate charge in the CSD19531Q5A?

A: The CSD19531Q5A exhibits 5 nC higher gate charge (48 nC vs. 43 nC) at 10V gate voltage. This results in marginally increased switching losses and slightly longer switching times. The difference is negligible in most applications and does not prevent functional substitution.

Q: How does the higher input capacitance of the CSD19531Q5A affect circuit performance?

A: The CSD19531Q5A has 1650 pF higher input capacitance (3870 pF vs. 2220 pF) at 50V. This increases gate drive current requirements and switching losses proportionally. Gate driver circuits must supply adequate current to charge this capacitance within required switching time windows. Existing gate driver designs for the FDWS86068-F085 should be evaluated for current capacity when substituting the CSD19531Q5A.

Q: Which part should be selected for new designs?

A: Selection between these parts depends on supply availability, manufacturer preference, and specific application requirements. For automotive applications requiring explicit AEC-Q101 qualification, the FDWS86068-F085 is the specified choice. For general industrial applications where higher current capacity is beneficial, the CSD19531Q5A offers superior performance margins and higher inventory availability.