NSA5.0AFT3G Equivalent & Substitute Parts

Part Overview

The NSA5.0AFT3G is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 5V reverse standoff voltage with a 9.2V maximum clamping voltage and 44.6A peak pulse current capability in a surface-mount SMA-FL package. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

NSA5.0AFT3G

Littelfuse Inc.In Stock: 2242NSA5.0AFT3G Datasheet

Current PartRFQ

SMA6L5.0A

Littelfuse Inc.In Stock: 92498SMA6L5.0A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SMA6L5.0A qualifies as a direct substitute for the NSA5.0AFT3G based on the following critical electrical and mechanical parameters:

Matching Parameters:

• Voltage - Reverse Standoff (Typ): 5V
• Voltage - Breakdown (Min): 6.4V
• Voltage - Clamping (Max) @ Ipp: 9.2V
• Operating Temperature Range: -65°C to 150°C (TJ)
• Mounting Type: Surface Mount
• Package / Case: DO-221AC, SMA Flat Leads
• RoHS Status: ROHS3 Compliant
• Unidirectional Channels: 1

Enhanced Performance Characteristics: The SMA6L5.0A provides increased current handling capability (65.3A peak pulse versus 44.6A) and higher power dissipation (600W versus 400W), making it suitable for applications requiring the same voltage protection with greater transient energy absorption capacity.

Parameter Comparison

Engineering Selection Recommendations

The SMA6L5.0A is the appropriate substitute for the obsolete NSA5.0AFT3G. Both components maintain identical voltage protection characteristics (5V standoff, 6.4V breakdown minimum, 9.2V clamping maximum) and are housed in the same DO-221AC SMA flat-lead package, ensuring direct mechanical and electrical compatibility in existing circuit designs.

The SMA6L5.0A carries active product status with full manufacturing support, whereas the NSA5.0AFT3G is obsolete. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The SMA6L5.0A's enhanced current and power ratings (65.3A and 600W respectively, compared to 44.6A and 400W) provide superior transient suppression capability without compromising the voltage protection profile required by the original design.

Frequently Asked Questions (FAQ)

Q: Can the SMA6L5.0A be used as a direct replacement for the NSA5.0AFT3G?

A: Yes. Both components share identical voltage specifications (5V standoff, 6.4V breakdown, 9.2V clamping), operating temperature range (-65°C to 150°C), and package configuration (DO-221AC SMA flat leads). The SMA6L5.0A is electrically and mechanically compatible with designs originally specified for the NSA5.0AFT3G.

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

A: The primary differences are product status and current/power ratings. The NSA5.0AFT3G is obsolete, while the SMA6L5.0A is active. The SMA6L5.0A provides higher peak pulse current (65.3A versus 44.6A) and peak pulse power (600W versus 400W), offering enhanced transient energy absorption capability.

Q: Are there any package or footprint considerations?

A: No. Both components use the DO-221AC package with SMA flat leads, ensuring identical PCB footprints and assembly compatibility. No layout modifications are required when substituting the SMA6L5.0A for the NSA5.0AFT3G.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. Both the NSA5.0AFT3G and SMA6L5.0A are ROHS3 compliant and REACH unaffected, satisfying current environmental and regulatory requirements.

Q: Why would the higher current rating of the SMA6L5.0A be beneficial?

A: The increased peak pulse current (65.3A) and power dissipation (600W) allow the SMA6L5.0A to handle larger transient events while maintaining the same voltage clamping characteristics. This provides design margin for applications subject to variable or higher-energy transient conditions.