SMFE14ALH Equivalent & Substitute Parts

Part Overview

The SMFE14ALH is an active Transient Voltage Suppressor (TVS) diode manufactured by Eaton - Electronics Division. This unidirectional zener-type device is designed for transient overvoltage protection in surface mount applications, with a reverse standoff voltage of 14V and peak pulse current rating of 17.2A. The component is qualified to AEC-Q101 automotive standards and is RoHS3 compliant. Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate alternative sourcing requirements while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

SMFE14ALH

Eaton - Electronics DivisionIn Stock: 1013SMFE14ALH Datasheet

Current PartRFQ

VTVS15ASMF-HM3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 2215VTVS15ASMF-HM3-08 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMFE14ALH are identified based on electrical parameter compatibility within the following criteria:

Voltage Parameters: Reverse standoff voltage tolerance of ±1.1V, breakdown voltage within ±1.5V, and clamping voltage within ±1.8V of the main part specifications.

Current Parameters: Peak pulse current rating within ±2.27A of the main part specification (17.2A nominal).

Power Rating: Peak pulse power rating of 400W (matching specification).

Mechanical Compatibility: Surface mount packaging with automotive-grade qualification and AEC-Q101 certification.

Environmental Compliance: RoHS3 compliance and operating temperature range support for -55°C to 150°C minimum.

Unidirectional Configuration: Single-channel zener-type TVS diode topology.

The VTVS15ASMF-HM3-08 meets these substitution criteria with allowable parameter variations within engineering tolerance bands for transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SMFE14ALH and VTVS15ASMF-HM3-08 are active, automotive-grade TVS diodes with AEC-Q101 qualification and RoHS3 compliance. Selection between these parts is determined by application-specific requirements and package constraints.

SMFE14ALH Selection Criteria:

• SOD-123F package footprint requirement
• Reverse standoff voltage of 14V nominal
• Peak pulse current requirement of 17.2A
• Operating temperature range up to 150°C (TJ)

VTVS15ASMF-HM3-08 Selection Criteria:

• DO-219AB (SMF) package footprint requirement
• Reverse standoff voltage of 15.1V nominal
• Peak pulse current requirement of 15.47A
• Extended operating temperature range up to 175°C (TJ)
• Higher clamping voltage specification (25V vs. 23.2V)

Both parts maintain identical peak pulse power rating (400W), automotive qualification status, and compliance certifications. Package selection and voltage parameter tolerance requirements determine appropriate part substitution for specific circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the VTVS15ASMF-HM3-08 directly replace the SMFE14ALH in existing designs?

A: Direct replacement requires verification of package footprint compatibility. The SMFE14ALH uses SOD-123F packaging, while the VTVS15ASMF-HM3-08 uses DO-219AB (SMF) packaging. These packages have different physical dimensions and PCB land patterns. Electrical parameter differences (reverse standoff voltage 15.1V vs. 14V, clamping voltage 25V vs. 23.2V) must be evaluated against circuit protection requirements.

Q: What are the key electrical differences between these parts?

A: The VTVS15ASMF-HM3-08 has a higher reverse standoff voltage (15.1V vs. 14V), higher breakdown voltage (17.1V vs. 15.6V), and higher clamping voltage (25V vs. 23.2V). Peak pulse current is lower (15.47A vs. 17.2A). Both maintain 400W peak pulse power rating. These differences affect transient suppression characteristics and must be evaluated for specific circuit voltage levels and transient energy profiles.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SMFE14ALH and VTVS15ASMF-HM3-08 carry automotive-grade designation with AEC-Q101 qualification. Both are RoHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (unlimited) for both parts, indicating no special handling requirements.

Q: What is the temperature operating range difference?

A: The SMFE14ALH operates from -55°C to 150°C (TJ), while the VTVS15ASMF-HM3-08 operates from -55°C to 175°C (TJ). The substitute part provides 25°C additional high-temperature margin. Application thermal requirements determine whether this extended range is necessary.

Q: How do the package types affect circuit design?

A: SOD-123F (SMFE14ALH) and DO-219AB/SMF (VTVS15ASMF-HM3-08) are both surface mount packages but have different footprints, lead spacing, and PCB land pattern requirements. PCB layout modifications are required for substitution. Consult package datasheets for specific dimensional specifications and land pattern designs.

Q: Are there inventory considerations for these parts?

A: The SMFE14ALH has 1003 pieces in stock, while the VTVS15ASMF-HM3-08 has 2200 pieces in stock. Both are listed as active products with new original inventory available.