SMF22A-M3-18 Equivalent & Substitute Parts

Part Overview

The SMF22A-M3-18 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates as a Zener-type TVS device in the eSMP® series, designed for general-purpose transient voltage protection applications. The device is currently in active production status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance parameters are maintained across alternative packaging configurations while preserving core functional specifications.

Substiute Parts

SMF22A-M3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1133SMF22A-M3-18 Datasheet

Current PartRFQ

SMF22A-TP

Micro Commercial CoIn Stock: 5805SMF22A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMF22A-M3-18 is determined by electrical parameter equivalence across the following critical specifications:

• 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
• Operating Temperature Range: -65°C to 175°C
• Unidirectional Channel Configuration: 1 channel
• Type Classification: Zener TVS Diode
• RoHS Compliance: ROHS3 Compliant

The SMF22A-TP qualifies as a substitute part because it maintains identical electrical performance parameters while utilizing an alternative surface-mount package configuration (SOD-123FL versus DO-219AB). Both parts share the same base product number (SMF22) and are manufactured to equivalent specifications for transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SMF22A-M3-18 and SMF22A-TP maintain active production status and satisfy ROHS3 compliance requirements. Selection between these parts is determined by printed circuit board layout constraints and available land pattern footprints. The SMF22A-M3-18 utilizes the DO-219AB (SMF) package, while the SMF22A-TP utilizes the SOD-123F package. Both configurations deliver identical electrical performance for transient voltage suppression in the 22V standoff voltage class. Component selection should be based on PCB design requirements and available inventory.

Frequently Asked Questions (FAQ)

Q: Can SMF22A-TP replace SMF22A-M3-18 in existing designs?

A: Electrical substitution is valid when PCB land patterns accommodate the SOD-123F package footprint. The SMF22A-TP delivers identical voltage clamping, peak pulse current, and power dissipation specifications. Physical package dimensions differ between DO-219AB and SOD-123F configurations.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution requires matching specifications across: 22V reverse standoff voltage, 24.4V minimum breakdown voltage, 35.5V maximum clamping voltage, 5.6A peak pulse current, and 200W peak pulse power rating. Both parts meet these criteria.

Q: Are there differences in operating temperature specifications?

A: The SMF22A-M3-18 specifies junction temperature (TJ) range of -65°C to 175°C, while the SMF22A-TP specifies ambient temperature (TA) range of -65°C to 175°C. Both parts operate across the same temperature extremes.

Q: Do both parts have identical moisture sensitivity ratings?

A: Yes. Both the SMF22A-M3-18 and SMF22A-TP carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity constraints during storage or handling.

Q: What is the primary difference between these substitute parts?

A: The primary difference is package configuration. The SMF22A-M3-18 uses DO-219AB (SMF) packaging, while the SMF22A-TP uses SOD-123F packaging. Electrical performance parameters are identical.