SMF22A-T13 Equivalent & Substitute Parts

Part Overview

The SMF22A-T13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 22V reverse standoff voltage and provides 35.5V maximum clamping voltage at peak pulse current, with a peak pulse power rating of 200W. The part is actively produced and ROHS3 compliant, making it suitable for modern electronic assemblies requiring transient voltage suppression in the 22V protection class.

Equivalent and substitute parts are identified when they maintain identical electrical performance parameters and mechanical compatibility within the SOD-123F package family, ensuring direct functional replacement without circuit redesign.

Substiute Parts

SMF22A-T13

Littelfuse Inc.In Stock: 945SMF22A-T13 Datasheet

Current PartRFQ

SMF22A

MDDIn Stock: 20428SMF22A Datasheet

DirectRFQ

SMF22A-TP

Micro Commercial CoIn Stock: 5805SMF22A-TP Datasheet

DirectRFQ

SMF22A_R1_00001

Panjit International Inc.In Stock: 5785SMF22A_R1_00001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF22A-T13 are qualified based on the following electrical and mechanical criteria:

• Voltage Class Match: Reverse standoff voltage of 22V ± tolerance, breakdown voltage minimum of 24.4V, and clamping voltage maximum of 35.5V at peak pulse current
• Current Rating: Peak pulse current of 5.6A at 10/1000µs pulse duration
• Power Dissipation: Peak pulse power of 200W
• Package Compatibility: SOD-123F surface-mount package or equivalent mechanical footprint
• Compliance: ROHS3 compliance and active product status
• Unidirectional Configuration: Single-channel Zener-type TVS diode

All identified substitutes maintain these parameters within the specified tolerances, ensuring electrical and thermal equivalence for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

All four parts listed—SMF22A-T13 (Littelfuse), SMF22A (MDD), SMF22A-TP (Micro Commercial Co), and SMF22A_R1_00001 (Panjit)—are electrically and mechanically equivalent for direct substitution. Selection among these parts should be based on:

• Availability: Current inventory levels vary by manufacturer and distributor
• Supply Chain Continuity: Multiple qualified sources reduce single-source risk
• Compliance Certification: All parts maintain ROHS3 compliance and active product status
• Operating Temperature Range: SMF22A-TP offers an extended temperature range (-65 to 175°C TA) compared to the standard -55 to 150°C (TJ) specification of other variants, providing additional thermal margin in extreme environments
• Package Designation: SMF22A (MDD) lists both SOD-123F and SMF package designations; verify footprint compatibility with board design

No performance trade-offs exist among these substitutes when electrical parameters and package compatibility are maintained.

Frequently Asked Questions (FAQ)

Q: Can SMF22A-T13 be replaced with SMF22A (MDD) on the same PCB?

A: Yes. Both parts share identical electrical parameters (22V standoff, 35.5V clamping, 5.6A peak pulse) and SOD-123F package compatibility. Direct board-level substitution is possible without circuit modification.

Q: What is the difference between SMF22A-TP and SMF22A-T13?

A: The electrical performance is identical. SMF22A-TP is manufactured by Micro Commercial Co and specifies an extended operating temperature range of -65 to 175°C (TA) versus -55 to 150°C (TJ) for SMF22A-T13. Both are ROHS3 compliant and actively produced.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitutes use the SOD-123F surface-mount package. SMF22A (MDD) additionally lists SMF as an alternative package designation; verify your board design specifies SOD-123F footprint compatibility.

Q: Can I use SMF22A_R1_00001 (Panjit) as a long-term replacement?

A: Yes. SMF22A_R1_00001 maintains all electrical specifications and ROHS3 compliance. It is actively produced and suitable for long-term supply continuity planning.

Q: Do these parts require any circuit redesign for substitution?

A: No. All substitute parts are electrically and mechanically equivalent. No circuit modifications, PCB layout changes, or firmware updates are required.

Q: Which substitute offers the best thermal performance?

A: SMF22A-TP (Micro Commercial Co) specifies the widest operating temperature range (-65 to 175°C TA), providing additional thermal margin in extreme environments. For standard applications within -55 to 150°C, all parts perform identically.