SML4744HE3_A/I Equivalent & Substitute Parts

Part Overview

The SML4744HE3_A/I is a Zener diode rated at 15 V, 1 W with ±10% tolerance, housed in a DO-214AC (SMA) surface mount package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as an automotive-grade device with AEC-Q101 qualification. The part is currently active in production with 715 pieces in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design revisions, or supply chain considerations.

Substiute Parts

SML4744HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 787SML4744HE3_A/I Datasheet

Current PartRFQ

SML4744-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 2096SML4744-E3/61 Datasheet

Parametric EquivalentRFQ

SML4744A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 5251SML4744A-E3/5A Datasheet

Parametric EquivalentRFQ

SML4744AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 6691SML4744AHE3_A/I Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SML4744HE3_A/I is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Zener voltage: 15 V nominal
• Maximum power dissipation: 1 W
• Package type: DO-214AC (SMA) surface mount
• Impedance (maximum): 14 Ohms
• Reverse leakage current: 5 µA @ 11.4 V
• Operating temperature: 150°C
• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)

Tolerance Variation: Substitute parts may differ in voltage tolerance specification (±10% or ±5%). Parts with ±5% tolerance provide tighter voltage regulation and are functionally compatible with designs specified for ±10% tolerance.

Automotive Qualification: The main part SML4744HE3_A/I carries AEC-Q101 automotive qualification. Substitute SML4744AHE3_A/I maintains this qualification. Substitute SML4744-E3/61 and SML4744A-E3/5A do not carry automotive qualification but maintain all electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

SML4744-E3/61: This part is a direct parametric equivalent with identical electrical specifications and ±10% tolerance matching the main part. It differs only in the absence of automotive grade designation and AEC-Q101 qualification. Selection is appropriate for non-automotive applications or where automotive qualification is not a design requirement. Inventory availability is 2020 pieces.

SML4744A-E3/5A: This part provides tighter voltage tolerance (±5% versus ±10%), resulting in improved voltage regulation accuracy. All electrical and mechanical parameters remain equivalent. Automotive qualification is not included. This part is suitable for applications requiring enhanced voltage stability. Inventory availability is 5223 pieces.

SML4744AHE3_A/I: This part maintains full equivalence with the main part, including automotive grade designation and AEC-Q101 qualification. The tolerance specification is ±5%, providing improved voltage accuracy compared to the main part's ±10%. This part is the preferred substitute for automotive applications requiring maintained qualification status with enhanced performance. Inventory availability is 6681 pieces.

All substitute parts maintain RoHS3 compliance, MSL 1 (Unlimited) rating, and identical mechanical packaging in DO-214AC (SMA) surface mount configuration.

Frequently Asked Questions (FAQ)

Q: Can SML4744-E3/61 be used as a direct replacement for SML4744HE3_A/I in automotive applications?

A: SML4744-E3/61 is electrically and mechanically equivalent but lacks automotive grade designation and AEC-Q101 qualification. Use in automotive applications depends on design specifications and qualification requirements. If automotive qualification is mandatory, use SML4744AHE3_A/I instead.

Q: What is the difference between ±10% and ±5% tolerance in these Zener diodes?

A: Tolerance specifies the allowable deviation of the Zener voltage from the nominal 15 V rating. ±10% tolerance allows deviation from 13.5 V to 16.5 V. ±5% tolerance allows deviation from 14.25 V to 15.75 V. Tighter tolerance (±5%) provides more precise voltage regulation. Both tolerances are functionally compatible in circuit designs.

Q: Are all substitute parts in the same package?

A: Yes. All parts listed—SML4744HE3_A/I, SML4744-E3/61, SML4744A-E3/5A, and SML4744AHE3_A/I—use the DO-214AC (SMA) surface mount package. No PCB layout or footprint modifications are required for substitution.

Q: Which substitute part should be selected for maximum inventory availability?

A: SML4744AHE3_A/I has the highest inventory at 6681 pieces. This part also maintains automotive qualification and AEC-Q101 certification while providing ±5% tolerance for improved voltage accuracy.

Q: Do all parts comply with RoHS3 and REACH regulations?

A: Yes. All parts listed are ROHS3 compliant and REACH unaffected. All parts carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can SML4744A-E3/5A be used in place of SML4744HE3_A/I in non-automotive circuits?

A: Yes. SML4744A-E3/5A is electrically and mechanically equivalent with identical power rating, impedance, and reverse leakage specifications. The ±5% tolerance provides improved voltage accuracy compared to the ±10% specification of the main part. Automotive qualification is not included but is not required for non-automotive applications.