SMF28A-TP Equivalent & Substitute Parts

Part Overview

The SMF28A-TP is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose transient protection applications. This surface-mount component operates with a 28V reverse standoff voltage and provides 45.4V maximum clamping voltage at peak pulse current. The part is Active status and RoHS3 compliant, making it suitable for modern electronic circuit protection requirements. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

SMF28A-TP

Micro Commercial CoIn Stock: 1931SMF28A-TP Datasheet

Current PartRFQ

SMF28A

MDDIn Stock: 20400SMF28A Datasheet

DirectRFQ

SMF28A-T13

Littelfuse Inc.In Stock: 18674SMF28A-T13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF28A-TP are qualified based on electrical parameter equivalence and mechanical compatibility. The critical parameters determining substitution eligibility are:

• Voltage - Reverse Standoff: 28V (nominal)
• Voltage - Clamping (Max) @ Ipp: 45.4V
• Current - Peak Pulse (10/1000µs): 4.4A
• Power - Peak Pulse: 200W
• Unidirectional Channels: 1
• Type: Zener
• Package / Case: SOD-123F (surface mount)

All identified substitute parts maintain these electrical specifications and package compatibility. Variations in operating temperature range and manufacturer do not affect functional substitution for general-purpose transient protection applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SMF28A-TP, SMF28A, and SMF28A-T13—are Active status components with identical electrical specifications and RoHS3 compliance. Selection between these parts may be based on:

• Manufacturer availability and supply chain requirements
• Packaging format preference (Tape & Reel for all variants)
• Operating temperature range requirements (SMF28A-TP supports -65°C to 175°C; SMF28A and SMF28A-T13 support -55°C to 150°C)
• Inventory levels and lead time considerations

All parts are suitable for direct substitution in general-purpose transient protection circuits where the specified electrical parameters are required.

Frequently Asked Questions (FAQ)

Q: Can SMF28A replace SMF28A-TP in my circuit? A: Yes. Both parts share identical electrical specifications (28V standoff, 45.4V clamping, 4.4A peak pulse current, 200W peak power) and SOD-123F package compatibility. The primary difference is the operating temperature range; SMF28A-TP supports -65°C to 175°C while SMF28A supports -55°C to 150°C.

Q: What is the difference between SMF28A-TP and SMF28A-T13? A: Both parts have identical electrical specifications and package type. The differences are manufacturer (Micro Commercial Co vs. Littelfuse Inc.) and operating temperature range (SMF28A-TP: -65°C to 175°C; SMF28A-T13: -55°C to 150°C).

Q: Are all substitute parts RoHS3 compliant? A: Yes. SMF28A-TP, SMF28A, and SMF28A-T13 are all ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: Can I use these parts interchangeably on the same PCB? A: Yes, provided your circuit operating temperature range does not exceed -55°C to 150°C. If your application requires operation below -55°C or above 150°C, SMF28A-TP is the appropriate selection due to its extended temperature range.

Q: What packaging format is used for these parts? A: All parts are supplied in Tape & Reel (TR) format with SOD-123F surface-mount package.