FDS3570 Equivalent & Substitute Parts

Part Overview

The FDS3570 is an N-Channel MOSFET manufactured by onsemi, rated for 80V drain-to-source voltage with 9A continuous drain current at 25°C. This device is housed in an 8-SOIC surface mount package and is part of the PowerTrench® series. The FDS3570 is classified as obsolete, making identification of equivalent substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter ranges to ensure direct replacement capability.

Substiute Parts

FDS3570

onsemiIn Stock: 16532FDS3570 Datasheet

Current PartRFQ

FDS3572

onsemiIn Stock: 7268FDS3572 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDS3570 is determined by strict equivalence across the following critical parameters:

Voltage Rating: Drain-to-source voltage must equal 80V to maintain circuit protection margins and switching characteristics.

Current Rating: Continuous drain current must be within the specified range to ensure thermal performance and safe operation under load conditions.

On-State Resistance: Rds On characteristics directly affect power dissipation and efficiency; substitute parts must maintain comparable or superior performance.

Package Configuration: All substitute parts must use the 8-SOIC surface mount package with identical pinout and mechanical dimensions to ensure PCB compatibility without layout modifications.

Operating Temperature Range: The -55°C to 150°C junction temperature range must be maintained for environmental specification compliance.

Gate Charge and Input Capacitance: These parameters affect switching speed and drive circuit requirements; substitutes must remain within acceptable ranges to prevent circuit redesign.

The FDS3572 qualifies as a direct substitute based on matching voltage rating, package type, operating temperature range, and gate threshold voltage, with improved on-state resistance and reduced gate charge characteristics.

Parameter Comparison

Engineering Selection Recommendations

FDS3572 as Primary Substitute:

The FDS3572 is the recommended substitute for the obsolete FDS3570. Both devices share identical voltage ratings (80V Vdss), matching gate threshold voltage specifications (4V @ 250µA), and identical package configuration (8-SOIC surface mount). The FDS3572 maintains the same operating temperature range (-55°C to 150°C) and power dissipation rating (2.5W).

The FDS3572 demonstrates superior electrical characteristics compared to the FDS3570: on-state resistance is reduced from 20mOhm to 16mOhm at 10V gate drive, gate charge is reduced from 76nC to 41nC, and input capacitance is reduced from 2750pF to 1990pF. These improvements result in lower switching losses and reduced drive circuit requirements without introducing compatibility issues.

Product Status Consideration:

The FDS3570 is classified as obsolete, while the FDS3572 maintains active product status with current manufacturing support. This status difference ensures long-term availability and supply chain continuity for the FDS3572.

Compliance and Certification:

The FDS3572 is RoHS3 compliant and maintains REACH unaffected status, matching the regulatory compliance profile of the FDS3570. Both devices carry identical ECCN (EAR99) and HTSUS (8541.29.0095) classifications.

Frequently Asked Questions (FAQ)

Q: Can the FDS3572 be used as a direct replacement for the FDS3570 without PCB modifications?

A: Yes. Both devices use the 8-SOIC surface mount package with identical pinout and mechanical dimensions (0.154" × 3.90mm width). No PCB layout changes are required for substitution.

Q: What are the key electrical differences between the FDS3570 and FDS3572?

A: The FDS3572 provides improved performance with lower on-state resistance (16mOhm vs. 20mOhm), reduced gate charge (41nC vs. 76nC), and lower input capacitance (1990pF vs. 2750pF). Drain current rating is 8.9A versus 9A, representing a 1.1% reduction. All other electrical specifications remain equivalent.

Q: Are the voltage ratings identical between these devices?

A: Yes. Both the FDS3570 and FDS3572 are rated for 80V drain-to-source voltage and ±20V maximum gate-source voltage. Operating temperature ranges are identical at -55°C to 150°C junction temperature.

Q: Why is the FDS3570 listed as obsolete?

A: The FDS3570 has been discontinued by onsemi. The FDS3572 represents the active product line continuation within the PowerTrench® series, offering equivalent or superior performance characteristics.

Q: Will substituting the FDS3572 affect circuit switching speed?

A: The FDS3572 exhibits reduced gate charge (41nC vs. 76nC) and lower input capacitance (1990pF vs. 2750pF), which typically result in faster switching transitions. Drive circuit requirements remain compatible due to matching gate threshold voltage specifications.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both devices maintain identical REACH unaffected status and EAR99 ECCN classification. The FDS3572 is RoHS3 compliant, ensuring regulatory alignment for new designs and procurement.

Q: What is the moisture sensitivity level for both devices?

A: Both the FDS3570 and FDS3572 carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.