SMF45A-T13 Equivalent & Substitute Parts

Part Overview

The SMF45A-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 45V reverse standoff voltage and provides 72.7V maximum clamping voltage at peak pulse current. The part is currently in active production status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range, enabling procurement flexibility and supply chain continuity.

Substiute Parts

SMF45A-T13

Littelfuse Inc.In Stock: 2285SMF45A-T13 Datasheet

Current PartRFQ

SMF45A-TP

Micro Commercial CoIn Stock: 3566SMF45A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMF45A-T13 is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 45V
• Voltage - Breakdown (Min): 50V
• Voltage - Clamping (Max) @ Ipp: 72.7V
• Current - Peak Pulse (10/1000µs): 2.8A
• Power - Peak Pulse: 200W
• Package / Case: SOD-123F
• Mounting Type: Surface Mount
• Type: Zener
• Unidirectional Channels: 1

The SMF45A-TP manufactured by Micro Commercial Co meets all electrical and mechanical requirements for direct substitution. Both parts maintain identical voltage ratings, peak pulse current specifications, and package configuration, ensuring functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SMF45A-T13 and SMF45A-TP are active production components with full RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement. Selection between these parts may be based on inventory availability, lead time, or supply chain considerations, as electrical and mechanical specifications are equivalent.

The SMF45A-TP offers extended operating temperature range (-65°C to 175°C ambient) compared to the SMF45A-T13 (-55°C to 150°C junction), providing additional thermal margin in applications subject to extreme environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can SMF45A-TP replace SMF45A-T13 in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters: 45V reverse standoff voltage, 72.7V clamping voltage, 2.8A peak pulse current, and SOD-123F package configuration. Direct substitution is supported without circuit modification.

Q: Are there differences in operating temperature ranges?

A: The SMF45A-T13 operates from -55°C to 150°C (junction temperature), while the SMF45A-TP operates from -65°C to 175°C (ambient temperature). The SMF45A-TP provides wider thermal operating margins for applications in extreme environments.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SMF45A-T13 and SMF45A-TP are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. Regulatory and environmental compliance is equivalent.

Q: What is the significance of the packaging designation (TR)?

A: TR indicates Tape & Reel packaging, a standard format for automated surface-mount assembly. Both parts are supplied in this format, ensuring compatibility with standard pick-and-place manufacturing processes.

Q: Are there any application limitations for either part?

A: Both parts are rated for general-purpose transient voltage suppression. The electrical specifications (45V standoff, 72.7V clamp, 2.8A peak pulse, 200W peak power) define the maximum transient protection capability. Application suitability depends on circuit voltage levels and expected transient magnitudes matching these specifications.