PUSB3FA2Z Equivalent & Substitute Parts

Part Overview

The PUSB3FA2Z is a 5V Transient Voltage Suppressor (TVS) diode manufactured by Nexperia USA Inc., designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional, 4-channel device operates across -40°C to 85°C and is actively produced with ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or specific application constraints.

Substiute Parts

PUSB3FA2Z

Nexperia USA Inc.In Stock: 3424PUSB3FA2Z Datasheet

Current PartRFQ

SP1004U-ULC-04UTG

Littelfuse Inc.In Stock: 105388SP1004U-ULC-04UTG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PUSB3FA2Z is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use the 10-XFDFN surface-mount package to ensure PCB footprint compatibility
• Voltage Rating: Clamping voltage and breakdown voltage must align with the 5V protection threshold
• Current Handling: Peak pulse current rating must support the 7A (8/20µs) specification
• Channel Configuration: Device must provide 4-channel protection architecture
• Compliance Standards: RoHS3 compliance and MSL 1 rating required for manufacturing and storage compatibility
• Operating Temperature: Temperature range must encompass or exceed -40°C to 85°C minimum

The identified substitute SP1004U-ULC-04UTG shares the 10-XFDFN package footprint and surface-mount configuration. However, critical electrical parameter differences exist that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the PUSB3FA2Z and SP1004U-ULC-04UTG maintain Active product status with ROHS3 compliance and MSL 1 ratings, confirming manufacturing viability and long-term availability. Selection between these devices depends on application-specific voltage and current requirements:

The PUSB3FA2Z is specified for 5V clamping voltage protection with 7A peak pulse current capacity, suitable for low-voltage digital signal lines and USB applications requiring bidirectional protection.

The SP1004U-ULC-04UTG operates at 9.2V clamping voltage with 2A peak pulse current capacity and provides unidirectional protection. This device is suitable for higher voltage rails or applications where directional protection is acceptable.

Package footprint compatibility (10-XFDFN) permits direct PCB layout substitution. However, the voltage and current rating differences necessitate circuit-level validation to confirm protection adequacy for the target application.

Frequently Asked Questions (FAQ)

Q: Can SP1004U-ULC-04UTG directly replace PUSB3FA2Z on the PCB?

A: Both devices use the 10-XFDFN package, enabling physical footprint compatibility. However, electrical performance differs significantly. The SP1004U-ULC-04UTG has higher clamping voltage (9.2V vs. 5V) and lower peak pulse current (2A vs. 7A), requiring circuit validation before substitution.

Q: What is the primary difference between these two TVS diodes?

A: The PUSB3FA2Z provides bidirectional 4-channel protection at 5V with 7A current handling, while the SP1004U-ULC-04UTG provides unidirectional 4-channel protection at 9.2V with 2A current handling. Voltage rating and directionality are the critical differentiators.

Q: Are both parts suitable for USB protection applications?

A: The PUSB3FA2Z is specifically designed for general-purpose USB protection with its 5V rating and bidirectional architecture. The SP1004U-ULC-04UTG operates at a higher voltage threshold and may not provide equivalent protection for standard USB signal lines.

Q: Do both parts meet the same compliance standards?

A: Both devices are ROHS3 compliant with MSL 1 ratings and Active product status, confirming equivalent compliance and manufacturing compatibility.

Q: What is the temperature operating range difference?

A: The PUSB3FA2Z operates from -40°C to 85°C, while the SP1004U-ULC-04UTG extends to 125°C. For applications requiring extended high-temperature operation, the SP1004U-ULC-04UTG provides broader thermal coverage.