SML4741AHE3_A/I Equivalent & Substitute Parts

Part Overview

The SML4741AHE3_A/I is an 11 V, 1 W Zener diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AC (SMA) surface mount package. This component is classified as an active product with AEC-Q101 automotive qualification and ROHS3 compliance. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in automotive and industrial circuits. Substitute parts may be required due to inventory constraints, supply chain disruptions, or design flexibility requirements while maintaining equivalent electrical and mechanical performance.

Substiute Parts

SML4741AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1078SML4741AHE3_A/I Datasheet

Current PartRFQ

SML4741A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 39799SML4741A-E3/61 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SML4741AHE3_A/I is permissible with parts that maintain identical electrical and mechanical specifications. The critical parameters that determine substitutability are:

• Zener voltage: 11 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 1 W
• Maximum impedance: 8 Ohms
• Reverse leakage current: 5 µA @ 8.4 V
• Operating temperature rating: 150°C
• Package type: DO-214AC (SMA) surface mount
• Automotive grade qualification: AEC-Q101
• Compliance standards: ROHS3, REACH Unaffected

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes. Variations in supplier device package designation, manufacturing date codes, or tape & reel configurations do not affect functional equivalence when all electrical and mechanical parameters remain constant.

Parameter Comparison

Engineering Selection Recommendations

The SML4741A-E3/61 is a direct parametric equivalent to the SML4741AHE3_A/I. Both parts share the same base product number (SML4741) and are manufactured by Vishay General Semiconductor - Diodes Division. All specified electrical parameters, mechanical package specifications, and compliance certifications are identical.

Selection between these parts is based on availability and supply chain considerations. The SML4741A-E3/61 maintains higher inventory levels (39,700 pcs) compared to the SML4741AHE3_A/I (1,025 pcs), making it suitable for applications where supply continuity is a priority. Both parts carry active product status, ROHS3 compliance, and REACH Unaffected designation, ensuring regulatory compatibility in automotive and industrial applications.

No electrical performance degradation or functional compromise occurs when substituting between these parts. PCB layout, thermal management, and circuit design considerations remain unchanged due to identical package geometry and electrical characteristics.

Frequently Asked Questions (FAQ)

Q: Can SML4741A-E3/61 be used as a direct replacement for SML4741AHE3_A/I in production assemblies?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (11 V nominal, ±5% tolerance, 1 W power rating, 8 Ohms maximum impedance), identical package type (DO-214AC/SMA surface mount), and identical compliance certifications (ROHS3, REACH Unaffected). No circuit modifications or design changes are required.

Q: Are there differences in the tape & reel packaging between these parts?

A: Both parts are supplied in Tape & Reel (TR) format. The different supplier device package designations (SML4741AHE3_A/I versus SML4741A-E3/61) reflect manufacturing or distribution variations but do not affect the physical package dimensions, pin configuration, or mounting characteristics.

Q: What is the significance of the base product number SML4741?

A: The base product number SML4741 identifies the core Zener diode design with 11 V nominal voltage and 1 W power rating. Suffix variations (such as AHE3_A/I and A-E3/61) indicate different manufacturing codes, date codes, or packaging configurations from Vishay, but the fundamental electrical and mechanical specifications remain constant.

Q: Are both parts suitable for automotive applications?

A: The SML4741AHE3_A/I carries explicit automotive grade designation and AEC-Q101 qualification. The SML4741A-E3/61 shares identical electrical and package specifications. Confirmation of automotive qualification status for the substitute part should be obtained from the supplier or manufacturer datasheet if automotive certification is a mandatory requirement for your application.

Q: What is the moisture sensitivity level, and does it affect handling?

A: Both parts have Moisture Sensitivity Level (MSL) 1, classified as Unlimited. This designation indicates the component has no moisture sensitivity restrictions and does not require special dry-pack storage or handling procedures during assembly.

Q: Can these parts be intermixed in the same production batch?

A: Yes. Both parts are parametric equivalents with identical electrical performance, package geometry, and thermal characteristics. They can be used interchangeably in the same circuit design and production assembly without functional or reliability differences.