FDW9926A Equivalent & Substitute Parts

Part Overview

The FDW9926A is a dual N-channel MOSFET array manufactured by onsemi, designed for surface mount applications in the 8-TSSOP package. This device features a 20V drain-to-source voltage rating with 4.5A continuous drain current capability and logic level gate operation. The FDW9926A is classified as obsolete, making identification of equivalent substitute components necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain electrical and mechanical compatibility while meeting current availability and compliance requirements.

Substiute Parts

FDW9926A

onsemiIn Stock: 17771FDW9926A Datasheet

Current PartRFQ

SI6926ADQ-T1-GE3

Vishay SiliconixIn Stock: 24268SI6926ADQ-T1-GE3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDW9926A is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Configuration: 2 N-Channel (Dual) MOSFET array
• Drain to Source Voltage (Vdss): 20V minimum
• Continuous Drain Current (Id): 4.5A or greater at 25°C
• Gate threshold voltage (Vgs(th)): Logic level operation (≤1.5V @ 250µA)
• On-state resistance (Rds On): 32mOhm or lower @ 4.5A, 4.5V
• Operating temperature range: -55°C to 150°C (TJ)

Mechanical Compatibility Requirements:

• Package type: 8-TSSOP surface mount
• Package dimensions: 0.173" × 4.40mm width
• Mounting type: Surface mount

The SI6926ADQ-T1-GE3 manufactured by Vishay Siliconix meets all electrical and mechanical substitution criteria for the FDW9926A. This substitute maintains the same package footprint, voltage rating, and logic level gate characteristics while providing equivalent or superior electrical performance.

Parameter Comparison

Engineering Selection Recommendations

FDW9926A (onsemi): This component is classified as obsolete. While inventory remains available (17,737 pcs), the obsolete status indicates discontinued manufacturing and limited long-term availability. Selection of this part is appropriate only for legacy system maintenance or existing stock utilization.

SI6926ADQ-T1-GE3 (Vishay Siliconix): This component is classified as active and ROHS3 compliant. The substitute provides superior electrical performance in on-state resistance (30mOhm vs. 32mOhm) and maximum power dissipation (830mW vs. 600mW). The continuous drain current rating of 4.1A is lower than the original 4.5A; applications requiring the full 4.5A rating must be evaluated against the substitute's capability. The substitute is recommended for new designs and ongoing production where component availability and compliance certifications are required.

Both parts maintain identical package footprints, voltage ratings, temperature ranges, and logic level gate operation, ensuring direct substitution at the circuit board level without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SI6926ADQ-T1-GE3 directly replace the FDW9926A in existing designs?

A: Yes, the SI6926ADQ-T1-GE3 provides direct mechanical and electrical substitution. Both devices use the 8-TSSOP package with identical footprints and pinouts. The substitute maintains the same 20V voltage rating, logic level gate operation, and temperature range. Applications operating at continuous drain currents below 4.1A experience no functional limitation. Applications requiring the full 4.5A rating must verify that the substitute's 4.1A rating meets circuit requirements.

Q: What is the primary reason for substituting the FDW9926A?

A: The FDW9926A is classified as obsolete, indicating discontinued manufacturing by onsemi. While current inventory exists, long-term availability cannot be assured. The SI6926ADQ-T1-GE3 is an active product with confirmed ongoing production, ensuring supply chain continuity for new designs and future production runs.

Q: Are there any compliance differences between these parts?

A: The FDW9926A carries REACH Unaffected status. The SI6926ADQ-T1-GE3 is ROHS3 compliant and REACH Unaffected. Both devices have MSL rating of 1 (Unlimited) and identical ECCN and HTSUS classifications. The substitute's ROHS3 compliance provides additional regulatory alignment for modern manufacturing environments.

Q: How do the electrical performance characteristics compare?

A: The SI6926ADQ-T1-GE3 demonstrates superior on-state resistance (30mOhm vs. 32mOhm at 4.5A, 4.5V) and higher maximum power dissipation (830mW vs. 600mW). Gate threshold voltage is lower (1V vs. 1.5V @ 250µA), indicating improved logic level gate performance. Gate charge is slightly higher (10.5nC vs. 9nC @ 4.5V). The continuous drain current rating is 4.1A compared to the original 4.5A.

Q: What packaging and mounting considerations apply?

A: Both parts use identical 8-TSSOP surface mount packages with 0.173" × 4.40mm dimensions. No PCB layout modifications, reflow profile adjustments, or assembly process changes are required. The SI6926ADQ-T1-GE3 is supplied in Tape & Reel (TR) packaging, standard for high-volume surface mount production.

Q: Are there input capacitance differences?

A: The FDW9926A specifies input capacitance (Ciss) of 630pF @ 10V. The SI6926ADQ-T1-GE3 does not provide this specification in the available data. Applications sensitive to input capacitance characteristics should obtain detailed datasheets from the respective manufacturers for complete comparison.