SMAJ48A-TP Equivalent & Substitute Parts

Part Overview

The SMAJ48A-TP is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co in DO-214AC (SMA) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 48V reverse standoff voltage and 77.4V maximum clamping voltage. The part is active in production status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

SMAJ48A-TP

Micro Commercial CoIn Stock: 5986SMAJ48A-TP Datasheet

Current PartRFQ

SMAJ48A

MDDIn Stock: 202171SMAJ48A Datasheet

DirectRFQ

SMAJ48A

MDDIn Stock: 202171SMAJ48A Datasheet

DirectRFQ

SMAJ48A-13-F

Diodes IncorporatedIn Stock: 4290SMAJ48A-13-F Datasheet

DirectRFQ

SMAJ48A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 214171SMAJ48A-E3/61 Datasheet

DirectRFQ

SMAJ48A-TR

STMicroelectronicsIn Stock: 2557SMAJ48A-TR Datasheet

SimilarRFQ

SZ1SMA48AT3G

Littelfuse Inc.In Stock: 15119SZ1SMA48AT3G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ48A-TP are classified based on strict electrical and mechanical parameter matching:

Direct Substitutes maintain identical electrical specifications across all critical parameters: 48V reverse standoff voltage, 53.3V minimum breakdown voltage, 77.4V maximum clamping voltage, 5.2A peak pulse current, and 400W peak pulse power. These parts are mechanically compatible in DO-214AC (SMA) surface mount package and share the same base product number SMAJ48. Direct substitutes include SMAJ48A (MDD), SMAJ48A-13-F (Diodes Incorporated), SMAJ48A-E3/61 (Vishay General Semiconductor), and SZ1SMA48AT3G (Littelfuse Inc.).

Similar Substitutes maintain the same reverse standoff voltage (48V) and breakdown voltage (53.3V) but differ in clamping voltage or peak pulse current specifications. SMAJ48A-TR (STMicroelectronics) exhibits 100V maximum clamping voltage and 23A peak pulse current (8/20µs), representing a higher performance variant suitable for applications requiring enhanced transient suppression capability while maintaining the same standoff protection threshold.

All substitute parts are ROHS3 compliant, MSL Level 1, and surface mount compatible in SMA package format.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active production status and ROHS3 compliance, ensuring long-term availability and regulatory conformance. Direct substitutes (SMAJ48A from MDD, SMAJ48A-13-F from Diodes Incorporated, SMAJ48A-E3/61 from Vishay, and SZ1SMA48AT3G from Littelfuse) provide identical electrical performance and are interchangeable at the circuit level. The SZ1SMA48AT3G variant includes AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C), suitable for automotive or high-reliability applications.

SMAJ48A-TR from STMicroelectronics represents a higher-performance alternative with 100V clamping voltage and 23A peak pulse current capability. This variant is appropriate for applications requiring enhanced transient suppression margin while maintaining the same 48V standoff protection threshold. Selection between standard and enhanced variants depends on circuit transient severity requirements and thermal design considerations.

Frequently Asked Questions (FAQ)

Q: Can SMAJ48A-TR be used as a direct replacement for SMAJ48A-TP?

A: SMAJ48A-TR maintains identical reverse standoff voltage (48V) and breakdown voltage (53.3V) but exhibits higher clamping voltage (100V) and peak pulse current (23A). It is electrically compatible for applications where the circuit can tolerate higher clamping voltage. Verify circuit design margins before substitution.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes maintain identical electrical specifications across all critical parameters including clamping voltage and peak pulse current. Similar substitutes maintain standoff and breakdown voltages but differ in clamping or current ratings. Direct substitutes are preferred for drop-in replacement scenarios.

Q: Are all substitute parts available in the same package?

A: All listed substitutes use DO-214AC (SMA) surface mount package format, ensuring mechanical compatibility with SMAJ48A-TP PCB layouts and assembly processes.

Q: Does SZ1SMA48AT3G offer any additional benefits?

A: SZ1SMA48AT3G includes AEC-Q101 automotive qualification and extended operating temperature range (-65°C to 150°C) compared to standard industrial variants. This part is suitable for automotive, industrial, or high-reliability applications requiring enhanced qualification documentation.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant and MSL Level 1 (unlimited moisture sensitivity), matching the compliance profile of SMAJ48A-TP. REACH status is unaffected for all variants.