FDY3000NZ Equivalent & Substitute Parts

Part Overview

The FDY3000NZ is a dual N-channel MOSFET array manufactured by onsemi, designed for surface mount applications in the SOT-563F package. This device features a 20V drain-to-source voltage rating with 600mA continuous drain current capability and logic level gate drive characteristics. The part is classified as Last Time Buy, indicating that onsemi has discontinued or will discontinue production. Identification of equivalent and substitute parts is necessary to ensure design continuity and procurement availability for new production runs and long-term support.

Substiute Parts

FDY3000NZ

onsemiIn Stock: 20267FDY3000NZ Datasheet

Current PartRFQ

PJX8808_R1_00001

Panjit International Inc.In Stock: 7945PJX8808_R1_00001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDY3000NZ is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must maintain a Vdss rating of 20V or greater to ensure safe operation across all specified circuit conditions.

Current Capability: The substitute part must support continuous drain current of 600mA or greater at 25°C to meet or exceed the original design current requirements.

On-Resistance: The substitute part must exhibit Rds On characteristics that do not exceed the original specification to prevent excessive power dissipation and thermal stress.

Gate Drive Characteristics: The substitute part must feature logic level gate drive capability with a gate threshold voltage compatible with standard digital control signals.

Package Compatibility: The substitute part must be available in SOT-563 or equivalent surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Configuration: The substitute part must maintain dual N-channel configuration to preserve circuit functionality.

The identified substitute part, PJX8808_R1_00001 from Panjit International Inc., meets these substitution criteria within the allowed parameter tolerances for this product category.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration - Product Status: The FDY3000NZ is designated Last Time Buy by onsemi, indicating production discontinuation. The PJX8808_R1_00001 maintains Active product status with Panjit International Inc., providing long-term availability and supply chain stability.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility across manufacturing and distribution channels. Both parts carry identical MSL ratings of 1 (Unlimited), eliminating moisture sensitivity concerns during storage and handling.

Current Rating Differential: The PJX8808_R1_00001 is rated for 500mA continuous drain current compared to the FDY3000NZ specification of 600mA. Applications operating at or near the 600mA maximum must evaluate thermal design margins. The substitute part's lower on-resistance (400mOhm versus 700mOhm) partially offsets the reduced current rating through improved efficiency.

Power Dissipation: The substitute part is rated for 300mW maximum power dissipation at ambient temperature, compared to 446mW for the original part. Thermal analysis of the specific application circuit is required to confirm adequate heat dissipation capability.

Gate Drive Compatibility: The PJX8808_R1_00001 features a lower gate threshold voltage (900mV versus 1.3V) and includes 1.2V drive specification, maintaining full compatibility with standard logic level gate drive circuits.

Packaging: Both parts utilize SOT-563 surface mount packages with identical pinout and mechanical dimensions, enabling direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the PJX8808_R1_00001 directly replace the FDY3000NZ in existing designs?

A: Direct replacement is possible for applications where continuous drain current does not exceed 500mA and thermal design accommodates the 300mW power dissipation rating. The lower gate threshold voltage and improved on-resistance of the substitute part provide enhanced performance in most logic-level gate drive applications. PCB layout remains unchanged due to identical SOT-563 package dimensions.

Q: What is the significance of the current rating difference between these parts?

A: The FDY3000NZ supports 600mA continuous drain current, while the PJX8808_R1_00001 is rated for 500mA. Applications requiring sustained current above 500mA must verify that the substitute part's thermal design and on-resistance characteristics maintain acceptable junction temperature and power dissipation within the circuit environment.

Q: How do the on-resistance values affect circuit performance?

A: The PJX8808_R1_00001 exhibits 400mOhm on-resistance compared to 700mOhm for the FDY3000NZ, both measured at 4.5V gate-source voltage. Lower on-resistance reduces conduction losses and heat generation, improving overall circuit efficiency. This characteristic partially compensates for the reduced current rating in applications operating below 500mA.

Q: Are there packaging considerations for this substitution?

A: Both parts are supplied in SOT-563 surface mount packages with identical pinout and mechanical footprint. The FDY3000NZ is supplied in Cut Tape (CT) packaging, while the PJX8808_R1_00001 is supplied in Tape & Reel (TR) format. This difference affects procurement and handling procedures but does not impact electrical or mechanical compatibility on the PCB.

Q: What compliance certifications apply to both parts?

A: Both the FDY3000NZ and PJX8808_R1_00001 maintain ROHS3 compliance and REACH Unaffected status. Both parts carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and assembly. These certifications ensure regulatory compliance across all manufacturing and distribution environments.

Q: How does the gate charge difference impact circuit design?

A: The PJX8808_R1_00001 exhibits 1.4nC gate charge compared to 1.1nC for the FDY3000NZ, both measured at 4.5V. The higher gate charge requires slightly increased driver current or extended switching time. For most logic-level gate drive applications, this difference is negligible and does not require circuit redesign.

Q: What thermal considerations apply when using the substitute part?

A: The PJX8808_R1_00001 is rated for 300mW maximum power dissipation at ambient temperature, compared to 446mW for the FDY3000NZ. Thermal analysis must confirm that the specific application circuit, including PCB copper area, thermal vias, and ambient operating conditions, maintains junction temperature within the -55°C to 150°C operating range when using the substitute part.