SMF22A-E3-18 Equivalent & Substitute Parts

Part Overview

The SMF22A-E3-18 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates within the eSMP® series and is designed for general-purpose transient voltage suppression applications. The device is currently in active production status with 676 pieces available in new original inventory. Alternative part sourcing becomes necessary due to supply chain considerations, manufacturing lead times, or regional availability constraints.

Substiute Parts

SMF22A-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 736SMF22A-E3-18 Datasheet

Current PartRFQ

SMF22A-TP

Micro Commercial CoIn Stock: 5805SMF22A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMF22A-E3-18 is determined by strict electrical parameter matching across the following criteria:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Breakdown (Min): 24.4V
• Voltage - Clamping (Max) @ Ipp: 35.5V
• Current - Peak Pulse (10/1000µs): 5.6A
• Power - Peak Pulse: 200W
• Type: Zener, Unidirectional
• Operating Temperature Range: -65°C to 175°C
• RoHS3 Compliance and REACH Unaffected status

The SMF22A-TP from Micro Commercial Co meets all critical electrical specifications and maintains identical voltage and current ratings. While the package differs (SOD-123FL versus DO-219AB), both are surface mount configurations suitable for automated assembly. Both parts share the same base product number (SMF22) and maintain equivalent functional performance within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

Both the SMF22A-E3-18 and SMF22A-TP are active production components with full RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution.

The primary consideration for part selection is package compatibility with the target PCB layout. The SMF22A-E3-18 uses the DO-219AB (SMF) package, while the SMF22A-TP uses the SOD-123F package. PCB footprint design, automated assembly equipment capabilities, and existing design documentation determine which package is appropriate for a given application.

All electrical performance parameters are identical between the two parts, ensuring functional equivalence within the specified operating envelope. Selection should be based on supply availability, lead time requirements, and mechanical fit within the target assembly.

Frequently Asked Questions (FAQ)

Q: Are the SMF22A-E3-18 and SMF22A-TP electrically equivalent?

A: Yes. Both parts are identical in all critical electrical parameters: 22V reverse standoff voltage, 24.4V minimum breakdown voltage, 35.5V maximum clamping voltage, 5.6A peak pulse current, and 200W peak pulse power. Both operate across the -65°C to 175°C temperature range.

Q: What is the difference between these two parts?

A: The primary difference is the package type. The SMF22A-E3-18 uses the DO-219AB (SMF) surface mount package, while the SMF22A-TP uses the SOD-123F surface mount package. Both are surface mount configurations, but they have different physical dimensions and PCB footprints.

Q: Can I substitute the SMF22A-TP for the SMF22A-E3-18 in my design?

A: Electrical substitution is valid if your PCB layout and assembly equipment support the SOD-123F package footprint. If your design is locked to the DO-219AB footprint, physical substitution is not possible without PCB redesign.

Q: Do both parts meet current compliance standards?

A: Yes. Both the SMF22A-E3-18 and SMF22A-TP are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use in regulated markets.

Q: What is the base product number for these parts?

A: Both parts share the base product number SMF22, indicating they are part of the same product family with identical electrical specifications.

Q: Are there any differences in capacitance specifications?

A: The SMF22A-E3-18 specifies 271pF capacitance at 1MHz. The SMF22A-TP does not provide a capacitance specification in the available data. This parameter should be confirmed with the manufacturer if capacitance is a critical design parameter.