SML4763HE3_A/I Zener Diode Equivalent & Substitute Parts

Part Overview

The SML4763HE3_A/I is a 91 V, 1 W surface mount zener diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AC (SMA) package. This component is classified as an active product with automotive-grade qualification (AEC-Q101) and is RoHS3 compliant. The part is used in voltage regulation and protection circuits requiring precise zener voltage characteristics at elevated power levels. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

SML4763HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 904SML4763HE3_A/I Datasheet

Current PartRFQ

SML4763A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 1910SML4763A-E3/61 Datasheet

Parametric EquivalentRFQ

SML4763AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 8577SML4763AHE3_A/I Datasheet

Parametric EquivalentRFQ

SMAJ4763A-TP

Micro Commercial CoIn Stock: 7589SMAJ4763A-TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SML4763HE3_A/I is determined by the following critical parameters:

Electrical Parameters (Must Match):

• Zener voltage: 91 V nominal
• Maximum power dissipation: 1 W
• Impedance (maximum): 250 Ohms
• Reverse leakage current: 5 µA @ 69.2 V
• Operating temperature range: -65°C to 150°C

Mechanical Parameters (Must Match):

• Package type: DO-214AC (SMA)
• Mounting type: Surface Mount
• Tape & Reel packaging format

Tolerance Consideration: The main part SML4763HE3_A/I specifies ±10% tolerance. Substitute parts with ±5% tolerance provide tighter voltage regulation and are electrically compatible, as ±5% tolerance is a subset of the ±10% specification window.

Compliance & Qualification: All identified substitutes maintain RoHS3 compliance, MSL Level 1 rating, and REACH unaffected status. Automotive-grade qualification (AEC-Q101) is present in the main part and in substitute SML4763AHE3_A/I, ensuring consistency for automotive applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - SML4763AHE3_A/I: This part is the preferred substitute for the SML4763HE3_A/I. Both components share identical electrical specifications, automotive-grade classification, and AEC-Q101 qualification. The SML4763AHE3_A/I features ±5% tolerance, providing superior voltage regulation precision compared to the ±10% tolerance of the main part. This part maintains full compatibility with automotive applications and carries the highest available inventory (8,520 pcs).

Secondary Substitute - SML4763A-E3/61: This Vishay part provides electrical equivalence with ±5% tolerance and identical electrical parameters. It lacks automotive-grade designation and AEC-Q101 qualification, making it suitable for non-automotive applications or where automotive qualification is not required. Inventory availability is 1,804 pcs.

Alternative Substitute - SMAJ4763A-TP: Manufactured by Micro Commercial Co, this part meets all electrical and mechanical requirements with ±5% tolerance. It is not automotive-qualified and does not carry AEC-Q101 certification. This part is suitable for general-purpose applications requiring 91 V zener regulation. Inventory availability is 7,516 pcs.

Selection Criteria:

• For automotive applications: Select SML4763AHE3_A/I
• For non-automotive applications with precision requirements: Select SML4763A-E3/61 or SMAJ4763A-TP
• All substitutes maintain identical mechanical compatibility and thermal operating range

Frequently Asked Questions (FAQ)

Q: Can SML4763A-E3/61 replace SML4763HE3_A/I in automotive circuits?

A: SML4763A-E3/61 is not automotive-qualified and does not carry AEC-Q101 certification. For automotive applications, use SML4763AHE3_A/I, which maintains both automotive-grade classification and AEC-Q101 qualification.

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

A: Tolerance specifies the allowable deviation from the nominal zener voltage. The SML4763HE3_A/I with ±10% tolerance allows zener voltage between 81.9 V and 100.1 V. Substitutes with ±5% tolerance allow deviation between 86.45 V and 95.55 V, providing tighter voltage regulation. Both are electrically compatible; ±5% tolerance is more precise.

Q: Are all substitute parts in the same DO-214AC package?

A: Yes. All listed substitutes use the DO-214AC (SMA) surface mount package with identical mechanical dimensions and PCB footprint compatibility.

Q: Can SMAJ4763A-TP be used in place of SML4763HE3_A/I?

A: SMAJ4763A-TP meets all electrical and mechanical specifications. However, it is manufactured by Micro Commercial Co rather than Vishay and lacks automotive qualification. Use this part only in non-automotive applications or where manufacturer source flexibility is acceptable.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is the Automotive Electronics Council qualification standard for discrete semiconductors. It certifies that the component meets automotive industry reliability, quality, and performance requirements. For automotive applications, select only AEC-Q101 qualified parts.

Q: Do all substitutes have the same reverse leakage current specification?

A: Yes. All listed parts specify 5 µA reverse leakage current at 69.2 V, ensuring identical leakage performance across all substitutes.

Q: Is there a difference in moisture sensitivity between the main part and substitutes?

A: No. All parts carry MSL Level 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.