SMF54A-T13 Equivalent & Substitute Parts

Part Overview

The SMF54A-T13 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This surface-mount component operates with a 54V reverse standoff voltage and provides peak pulse power dissipation of 200W in a compact SOD-123F package. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining identical electrical and mechanical specifications.

Substiute Parts

SMF54A-T13

Littelfuse Inc.In Stock: 754SMF54A-T13 Datasheet

Current PartRFQ

SMF54A

Diotec SemiconductorIn Stock: 35342SMF54A Datasheet

DirectRFQ

SMF54A-TP

Micro Commercial CoIn Stock: 9161SMF54A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF54A-T13 are qualified based on strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Breakdown (Min): 60V
• Voltage - Clamping (Max) @ Ipp: 87.1V
• Current - Peak Pulse (10/1000µs): 2.3A
• Power - Peak Pulse: 200W
• Unidirectional Channels: 1
• Package / Case: SOD-123F
• Mounting Type: Surface Mount
• Type: Zener
• Applications: General Purpose

All identified substitute parts maintain identical electrical performance characteristics and physical packaging specifications. Substitution is valid across manufacturers when these parameters are matched.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SMF54A-T13 (Littelfuse Inc.), SMF54A (Diotec Semiconductor), and SMF54A-TP (Micro Commercial Co)—are functionally equivalent and interchangeable for applications requiring 54V unidirectional TVS diode protection in SOD-123F surface-mount packaging.

Selection among these parts should be based on:

• Procurement availability and lead time requirements
• Supplier inventory levels and pricing
• Compliance certifications: All parts maintain ROHS3 compliance and are suitable for regulated applications
• Operating temperature range: SMF54A-TP supports extended temperature operation (-65°C to 175°C TA) compared to SMF54A-T13 (-55°C to 150°C TJ) and SMF54A (-50°C to 150°C TJ)
• Moisture sensitivity: SMF54A-T13 and SMF54A-TP both specify MSL 1 (Unlimited); SMF54A lists MSL as Not Applicable

Frequently Asked Questions (FAQ)

Q: Can SMF54A (Diotec) be used as a direct replacement for SMF54A-T13 (Littelfuse)?

A: Yes. Both parts share identical electrical specifications (54V standoff, 87.1V clamping, 2.3A peak pulse, 200W power dissipation) and physical packaging (SOD-123F surface mount). Both are ROHS3 compliant and active production parts.

Q: What is the difference between SMF54A-TP and SMF54A-T13?

A: The parts are electrically and mechanically identical. SMF54A-TP is manufactured by Micro Commercial Co and supports a wider operating temperature range (-65°C to 175°C TA versus -55°C to 150°C TJ for SMF54A-T13). Both maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: Are all three parts suitable for the same PCB assembly process?

A: Yes. All three parts use identical SOD-123F surface-mount packaging and are compatible with standard reflow soldering processes. No design or assembly modifications are required when substituting between these parts.

Q: Which part should be selected for high-temperature applications?

A: SMF54A-TP supports the highest operating temperature range (-65°C to 175°C TA) and is the appropriate choice for applications requiring extended thermal performance.

Q: Do all substitute parts have the same moisture sensitivity classification?

A: SMF54A-T13 and SMF54A-TP both specify MSL 1 (Unlimited). SMF54A lists MSL as Not Applicable. For moisture-sensitive applications, SMF54A-T13 and SMF54A-TP provide explicit unlimited moisture sensitivity ratings.