SMF58A-TP Equivalent & Substitute Parts

Part Overview

The SMF58A-TP is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection applications. This surface-mount component operates with a reverse standoff voltage of 58V and provides clamping at 93.6V maximum, with a peak pulse current rating of 2.1A. The part is actively produced and ROHS3 compliant, making it suitable for modern electronic designs requiring transient voltage suppression in the 58V protection class.

Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and operational parameters that ensure functional interchangeability within the specified voltage and current ratings.

Substiute Parts

SMF58A-TP

Micro Commercial CoIn Stock: 3429SMF58A-TP Datasheet

Current PartRFQ

SMF58A

MeritekIn Stock: 19292SMF58A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMF58A-TP is determined by the following critical parameters:

• Voltage - Reverse Standoff: 58V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 93.6V (exact match required)
• Current - Peak Pulse (10/1000µs): minimum 2.1A
• Package / Case: SOD-123F (mechanical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)
• Type: Zener, Unidirectional (functional equivalence)

Parts meeting these criteria are classified as direct substitutes. Variations in peak pulse current above the minimum threshold, operating temperature range, and manufacturer identity do not preclude substitution when all electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

The SMF58A manufactured by Meritek qualifies as a direct substitute for the SMF58A-TP. Both components share identical voltage specifications (58V reverse standoff, 93.6V clamping), equivalent peak pulse current ratings (2.1A vs. 2.14A), and matching power dissipation (200W). Both parts are ROHS3 compliant and maintain active product status.

The Meritek SMF58A operates within a narrower temperature range (-55°C to 150°C) compared to the Micro Commercial Co original (-65°C to 175°C). This difference should be evaluated against the specific thermal requirements of the application. The package designation variance (SOD-123FL vs. SOD-123F) reflects supplier documentation conventions and does not indicate mechanical incompatibility; both designations refer to the same physical SOD-123 form factor suitable for standard surface-mount assembly processes.

Selection between these parts should be based on availability, lead time, and application-specific temperature operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the Meritek SMF58A replace the Micro Commercial Co SMF58A-TP in all applications?

A: The Meritek SMF58A is electrically equivalent for applications operating within the temperature range of -55°C to 150°C. Applications requiring operation below -55°C or above 150°C must use the original SMF58A-TP to ensure compliance with the extended temperature specification of -65°C to 175°C.

Q: What does the package designation difference (SOD-123FL vs. SOD-123F) mean?

A: Both designations refer to the same physical surface-mount package form factor. The "L" suffix in SOD-123FL indicates lead-free termination in supplier documentation. This does not affect mechanical or electrical compatibility in standard surface-mount assembly.

Q: Are there any compliance differences between these parts?

A: Both the SMF58A-TP and SMF58A are ROHS3 compliant and carry identical REACH and ECCN classifications (REACH Unaffected, EAR99). No compliance barriers exist for substitution.

Q: What is the significance of the 0.04A difference in peak pulse current (2.1A vs. 2.14A)?

A: The Meritek part exceeds the minimum current specification, providing equivalent or superior performance. This variance falls within normal manufacturing tolerances for TVS diodes and does not affect substitution eligibility.

Q: How should I verify compatibility before implementing a substitute part?

A: Confirm that your application's operating temperature range falls within -55°C to 150°C if using the Meritek substitute. Verify that the 58V reverse standoff and 93.6V clamping voltage match your circuit protection requirements. Confirm that standard surface-mount assembly processes are compatible with your manufacturing environment.