SMF26A-M3-08 Equivalent & Substitute Parts

Part Overview

The SMF26A-M3-08 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the eSMP® series and provides transient overvoltage protection with a 26V reverse standoff voltage and 42.1V maximum clamping voltage. The part is Active status and RoHS3 compliant, making it suitable for general-purpose transient suppression applications. Equivalent and substitute parts may be required due to inventory constraints, packaging preferences, or application-specific requirements such as automotive qualification or alternative package geometries.

Substiute Parts

SMF26A-M3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 3334SMF26A-M3-08 Datasheet

Current PartRFQ

SMF26A-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 48468SMF26A-E3-18 Datasheet

DirectRFQ

SMF26A-HM3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 31230SMF26A-HM3-08 Datasheet

DirectRFQ

PTVS64VS1UTR,115

Nexperia USA Inc.In Stock: 12649PTVS64VS1UTR,115 Datasheet

MFR RecommendedRFQ

SMF26A-TP

Micro Commercial CoIn Stock: 10414SMF26A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF26A-M3-08 are classified based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Electrical Parameters (Critical for Substitution):

• Voltage - Reverse Standoff (Typ): 26V
• Voltage - Breakdown (Min): 28.9V
• Voltage - Clamping (Max) @ Ipp: 42.1V
• Current - Peak Pulse (10/1000µs): 4.8A
• Power - Peak Pulse: 200W
• Type: Zener, Unidirectional

Mechanical Parameters (Determines Physical Compatibility):

• Mounting Type: Surface Mount
• Package / Case: DO-219AB or equivalent footprint
• Supplier Device Package designation

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Product Status: Active

Substitute parts maintain identical electrical specifications while differing in packaging designation, manufacturer, or automotive qualification level. Parts with different package types (SOD-123W, SOD-123FL) require PCB layout verification but maintain electrical equivalence.

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (Same Voltage and Current Ratings):

SMF26A-E3-18 and SMF26A-HM3-08 are direct electrical equivalents to the SMF26A-M3-08, maintaining identical voltage standoff, breakdown, clamping, and peak pulse current specifications. Both are manufactured by Vishay in the DO-219AB (SMF) package. SMF26A-HM3-08 carries AEC-Q101 automotive qualification, making it suitable for automotive applications requiring formal qualification compliance. Selection between these three Vishay parts depends on packaging tape configuration and automotive requirements.

SMF26A-TP, manufactured by Micro Commercial Co, provides electrical equivalence but uses the SOD-123F package instead of DO-219AB. This alternative package requires PCB layout modification and footprint verification before implementation.

Non-Equivalent Part (Different Voltage Rating):

PTVS64VS1UTR,115 manufactured by Nexperia is not electrically equivalent to the SMF26A-M3-08. This part operates at 64V reverse standoff with 103V clamping voltage, representing a significantly higher voltage class. While it provides higher power dissipation (400W vs 200W) and extended temperature range (-55°C ~ 185°C), it is unsuitable as a direct substitute for 26V applications. This part is listed as manufacturer-recommended but requires circuit redesign for voltage compatibility.

Selection Criteria:

• For standard applications with DO-219AB package requirement: SMF26A-M3-08, SMF26A-E3-18
• For automotive applications requiring AEC-Q101 qualification: SMF26A-HM3-08
• For alternative package geometry (SOD-123F): SMF26A-TP with PCB layout verification
• PTVS64VS1UTR,115 is not suitable for direct substitution due to voltage rating mismatch

Frequently Asked Questions (FAQ)

Q: Can SMF26A-E3-18 replace SMF26A-M3-08 directly?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (26V standoff, 42.1V clamping, 4.8A peak pulse current) and the same DO-219AB package. The difference is in tape configuration (E3-18 vs M3-08 designation). Direct PCB substitution is possible without circuit modification.

Q: What is the difference between SMF26A-HM3-08 and SMF26A-M3-08?

A: Electrical specifications are identical. SMF26A-HM3-08 carries AEC-Q101 automotive qualification and is designated for automotive-grade applications. Both use the DO-219AB package. Selection depends on whether automotive qualification is required for your application.

Q: Can SMF26A-TP be used instead of SMF26A-M3-08?

A: Electrical specifications are identical, but SMF26A-TP uses the SOD-123F package instead of DO-219AB. PCB footprint and layout are different. Substitution requires PCB redesign and verification that the smaller SOD-123F footprint is compatible with your board layout and thermal requirements.

Q: Why is PTVS64VS1UTR,115 listed as a substitute if it has different voltage ratings?

A: PTVS64VS1UTR,115 is not a direct substitute. It operates at 64V standoff voltage versus 26V for the SMF26A-M3-08. This part is listed as manufacturer-recommended but is only suitable for applications requiring higher voltage protection. Using this part in a 26V circuit will result in inadequate transient suppression.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed parts (SMF26A-M3-08, SMF26A-E3-18, SMF26A-HM3-08, SMF26A-TP, and PTVS64VS1UTR,115) are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: Which substitute part has the widest operating temperature range?

A: PTVS64VS1UTR,115 operates from -55°C to 185°C (TA). The Vishay SMF26 series parts operate from -65°C to 175°C (TJ). Temperature range selection depends on your application environment and whether junction temperature (TJ) or ambient temperature (TA) specification is relevant to your design.