SMFE15AH Equivalent & Substitute Parts

Part Overview

The SMFE15AH is an active Transient Voltage Suppressor (TVS) diode manufactured by Eaton - Electronics Division. This unidirectional zener device is designed for transient overvoltage protection in telecom applications. The part operates with a 15V reverse standoff voltage and provides 24.4V maximum clamping voltage at peak pulse current of 8.2A. The SMFE15AH is surface-mounted in SOD-123F packaging and carries AEC-Q101 automotive qualification. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining identical electrical performance and compliance requirements.

Substiute Parts

SMFE15AH

Eaton - Electronics DivisionIn Stock: 975SMFE15AH Datasheet

Current PartRFQ

SMF15A-HE3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 3338SMF15A-HE3-08 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMFE15AH are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 15V
• Voltage - Breakdown (Min): 16.7V
• Voltage - Clamping (Max) @ Ipp: 24.4V
• Current - Peak Pulse (10/1000µs): 8.2A
• Power - Peak Pulse: 200W
• Type: Zener
• Unidirectional Channels: 1

Mechanical & Compliance Parameters (Must Match):

• Mounting Type: Surface Mount
• Grade: Automotive
• Qualification: AEC-Q101
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Package Compatibility: Substitute parts may utilize different surface-mount package designations (SOD-123F or DO-219AB) provided they accommodate the same PCB footprint requirements and solder reflow processes for the application.

The SMF15A-HE3-08 manufactured by Vishay General Semiconductor - Diodes Division meets all electrical and compliance requirements and qualifies as a direct substitute for the SMFE15AH.

Parameter Comparison

Engineering Selection Recommendations

The SMF15A-HE3-08 is a qualified substitute for the SMFE15AH based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match exactly, including reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and peak pulse power. Both devices are unidirectional zener TVS diodes with identical performance specifications.

Compliance & Certification: Both parts carry AEC-Q101 automotive qualification and are REACH Unaffected. Moisture sensitivity level is identical at MSL 1 (Unlimited), ensuring equivalent handling and storage requirements.

Product Status: Both parts are active products with current manufacturing support and inventory availability.

Operating Temperature: The SMF15A-HE3-08 provides an extended operating temperature range (-65°C ~ 175°C) compared to the SMFE15AH (-55°C ~ 150°C), offering broader thermal performance capability.

Package Consideration: The SMF15A-HE3-08 uses DO-219AB (SMF) packaging versus the SMFE15AH SOD-123F packaging. PCB layout and footprint compatibility must be verified for the specific application before implementation.

Frequently Asked Questions (FAQ)

Q: What electrical parameters must match for the SMF15A-HE3-08 to substitute the SMFE15AH?

A: The substitute must match the reverse standoff voltage (15V), breakdown voltage (16.7V minimum), clamping voltage (24.4V maximum at Ipp), peak pulse current (8.2A), and peak pulse power (200W). Both devices must be unidirectional zener TVS diodes with identical channel configuration.

Q: Are the package types interchangeable between SMFE15AH and SMF15A-HE3-08?

A: The SMFE15AH uses SOD-123F packaging while the SMF15A-HE3-08 uses DO-219AB (SMF) packaging. Although both are surface-mount packages, PCB footprint and land pattern compatibility must be confirmed for the specific application. Consult PCB design guidelines and component datasheets to verify mechanical fit.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the SMFE15AH and SMF15A-HE3-08 carry AEC-Q101 automotive qualification and are suitable for automotive-grade applications.

Q: What is the difference in operating temperature range between these parts?

A: The SMFE15AH operates from -55°C to 150°C (TJ), while the SMF15A-HE3-08 operates from -65°C to 175°C (TJ). The substitute part provides extended temperature capability at both lower and upper limits.

Q: Are moisture sensitivity requirements the same for both parts?

A: Yes. Both parts have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating identical handling, storage, and reflow requirements.

Q: Can the SMF15A-HE3-08 be used in telecom applications like the SMFE15AH?

A: The SMF15A-HE3-08 meets all electrical and compliance specifications required for transient voltage suppression. Application suitability depends on circuit design requirements and PCB layout compatibility with the DO-219AB package.