SMF11A-M3-08 Equivalent & Substitute Parts

Part Overview

The SMF11A-M3-08 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates with an 11V reverse standoff voltage and provides 18.2V maximum clamping voltage at peak pulse current. The device is housed in a DO-219AB (SMF) surface mount package and is designed for general-purpose transient voltage suppression applications. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when alternative components meet the electrical and mechanical requirements for the application while maintaining compatibility with circuit design parameters and manufacturing specifications.

Substiute Parts

SMF11A-M3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1006SMF11A-M3-08 Datasheet

Current PartRFQ

PTVS12VS1UTR,115

Nexperia USA Inc.In Stock: 5534PTVS12VS1UTR,115 Datasheet

MFR RecommendedRFQ

SMF11A-TP

Micro Commercial CoIn Stock: 3315SMF11A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF11A-M3-08 are identified based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Reverse standoff voltage within the specified range (11V nominal)
• Breakdown voltage minimum at or above 12.2V
• Clamping voltage maximum at or below 18.2V
• Peak pulse current capability at or above 11A
• Peak pulse power rating at or above 200W
• Unidirectional channel configuration (1 channel)
• Surface mount mounting type
• RoHS3 compliance

Secondary Compatibility Factors:

• Operating temperature range compatibility
• Package form factor (surface mount variants acceptable)
• Moisture sensitivity level (MSL 1 preferred)
• Active product status

Two substitute parts meet these criteria with varying package configurations and electrical performance enhancements.

Parameter Comparison

Engineering Selection Recommendations

PTVS12VS1UTR,115 (Nexperia): This substitute provides enhanced electrical performance with 20.1A peak pulse current and 400W peak pulse power, exceeding the main part specifications. The clamping voltage of 19.9V is within acceptable tolerance for applications designed for the SMF11A-M3-08. This part carries AEC-Q101 automotive qualification and operates across an extended temperature range (-55 to 185°C). The SOD-123W package requires PCB layout verification for mechanical compatibility. Selection is appropriate for applications requiring higher transient current handling or automotive-grade reliability.

SMF11A-TP (Micro Commercial Co): This substitute maintains electrical equivalence with identical reverse standoff voltage (11V), breakdown voltage (12.2V), clamping voltage (18.2V), and peak pulse current (11A) specifications. The SOD-123FL package represents a direct functional alternative with different mechanical footprint. Operating temperature range matches the main part (-65 to 175°C). Selection is appropriate for direct electrical replacement where package form factor change is acceptable.

Both substitutes maintain RoHS3 compliance, MSL 1 rating, and Active product status. All three parts are unidirectional Zener-type TVS diodes with single-channel configuration.

Frequently Asked Questions (FAQ)

Q: Can PTVS12VS1UTR,115 be used as a direct replacement for SMF11A-M3-08?

A: PTVS12VS1UTR,115 meets the electrical requirements for transient voltage suppression with equivalent or superior performance. The reverse standoff voltage is 12V (versus 11V), and clamping voltage is 19.9V (versus 18.2V). Both values remain within acceptable operating margins for circuits designed for the SMF11A-M3-08. However, the SOD-123W package differs from the DO-219AB package, requiring PCB layout modification.

Q: What is the difference between SMF11A-TP and SMF11A-M3-08?

A: SMF11A-TP is electrically identical to SMF11A-M3-08 with matching voltage and current specifications. The primary difference is the package form factor: SMF11A-TP uses SOD-123FL while SMF11A-M3-08 uses DO-219AB (SMF). Both are surface mount packages with different mechanical footprints and land patterns.

Q: Are there temperature range differences between the substitutes?

A: SMF11A-M3-08 and SMF11A-TP operate across -65 to 175°C (junction/ambient temperature). PTVS12VS1UTR,115 operates across -55 to 185°C, providing a wider upper temperature range. For applications operating below -55°C, the Nexperia part is not suitable; the Vishay or Micro Commercial parts are required.

Q: Does package change affect circuit performance?

A: Package change affects PCB layout, land pattern, and mechanical mounting only. Electrical performance and transient suppression characteristics remain determined by the semiconductor die specifications. DO-219AB, SOD-123W, and SOD-123F packages are all surface mount variants suitable for automated assembly.

Q: Are all three parts RoHS3 compliant?

A: Yes. SMF11A-M3-08, PTVS12VS1UTR,115, and SMF11A-TP are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level and REACH Unaffected status.

Q: Which substitute offers the best performance upgrade?

A: PTVS12VS1UTR,115 provides enhanced transient current handling (20.1A versus 11A) and doubled peak pulse power (400W versus 200W). This part is suitable for applications requiring higher transient energy absorption. SMF11A-TP provides electrical equivalence without performance enhancement, suitable for direct replacement where package compatibility exists.