SML4764HE3_A/I Zener Diode Equivalent & Substitute Parts

Part Overview

The SML4764HE3_A/I is a 100 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 automotive-grade qualification (AEC-Q101) and is RoHS3 compliant. The part is supplied in Tape & Reel packaging with 927 pieces currently in stock.

Equivalent and substitute parts are identified when design requirements permit component interchangeability based on electrical performance, mechanical compatibility, and regulatory compliance. Substitute parts maintain the same nominal Zener voltage (100 V), maximum power dissipation (1 W), package form factor (DO-214AC/SMA), and operating temperature range (-65°C to 150°C).

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	100	V
Tolerance	±10%	—
Power - Maximum	1	W
Impedance (Maximum)	350	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 76 V
Operating Temperature Range	-65 to 150	°C
Package / Case	DO-214AC (SMA)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SML4764HE3_A/I is determined by the following critical parameters:

Electrical Equivalence Criteria:

Zener voltage: 100 V nominal
Maximum power dissipation: 1 W
Impedance (maximum): 350 Ohms
Reverse leakage current: 5 µA @ 76 V
Operating temperature range: -65°C to 150°C

Mechanical Compatibility Criteria:

Package form factor: DO-214AC (SMA) surface mount
Tape & Reel packaging format

Regulatory & Compliance Criteria:

RoHS3 compliance
Moisture Sensitivity Level 1 (Unlimited)
REACH Unaffected status

Substitute parts are grouped into two categories based on tolerance specification:

Category 1 (±10% Tolerance): Parts maintaining the original ±10% Zener voltage tolerance specification.

Category 2 (±5% Tolerance): Parts with tighter ±5% Zener voltage tolerance, offering improved voltage regulation accuracy while maintaining all other electrical and mechanical parameters.

Parameter Comparison

Parameter	SML4764HE3_A/I	SML4764-E3/61	SML4764AHE3_A/H	SMAJ4764A-TP
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor	Micro Commercial Co
Voltage - Zener (Nom)	100 V	100 V	100 V	100 V
Tolerance	±10%	±10%	±5%	±5%
Power - Max	1 W	1 W	1 W	1 W
Impedance (Max)	350 Ohms	350 Ohms	350 Ohms	350 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 76 V	5 µA @ 76 V	5 µA @ 76 V	5 µA @ 76 V
Operating Temperature	-65°C to 150°C	-65°C to 150°C	-65°C to 150°C	-65°C to 150°C
Package / Case	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Grade	Automotive	—	Automotive	—
Qualification	AEC-Q101	—	AEC-Q101	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	927 Pcs	12400 Pcs	2342 Pcs	16589 Pcs

Engineering Selection Recommendations

SML4764-E3/61 (Vishay General Semiconductor)

This part is a direct parametric equivalent to the SML4764HE3_A/I, maintaining identical electrical specifications including ±10% Zener voltage tolerance, 1 W power rating, and 350 Ohms maximum impedance. Both parts are RoHS3 compliant with MSL 1 rating. The SML4764-E3/61 is suitable for applications where the original ±10% tolerance specification is acceptable. This part has higher inventory availability (12400 pieces) compared to the main part.

SML4764AHE3_A/H (Vishay General Semiconductor)

This substitute offers improved voltage regulation accuracy with ±5% Zener voltage tolerance while maintaining all other electrical parameters. The part retains automotive-grade qualification (AEC-Q101) and is manufactured by the same supplier as the main part. Selection of this part is appropriate when tighter voltage tolerance is required within the same design envelope. Inventory availability is 2342 pieces.

SMAJ4764A-TP (Micro Commercial Co)

This part provides ±5% Zener voltage tolerance with identical electrical performance across all other parameters. Manufactured by Micro Commercial Co, this substitute maintains full RoHS3 compliance and MSL 1 rating. The SMAJ4764A-TP is suitable for applications requiring improved voltage regulation accuracy from an alternative manufacturer. This part has the highest inventory availability (16589 pieces) among all substitutes.

All substitute parts are active products with confirmed RoHS3 compliance and REACH Unaffected status, ensuring regulatory compliance for current and future applications.

Frequently Asked Questions (FAQ)

Q: Can SML4764-E3/61 be used as a direct replacement for SML4764HE3_A/I?

A: Yes. Both parts share identical electrical specifications: 100 V nominal Zener voltage, ±10% tolerance, 1 W maximum power, 350 Ohms maximum impedance, and 5 µA reverse leakage current at 76 V. Both are packaged in DO-214AC (SMA) surface mount format with identical operating temperature range (-65°C to 150°C) and RoHS3 compliance.

Q: What is the difference between the ±10% and ±5% tolerance variants?

A: The ±10% tolerance parts (SML4764HE3_A/I and SML4764-E3/61) allow Zener voltage variation between 90 V and 110 V. The ±5% tolerance parts (SML4764AHE3_A/H and SMAJ4764A-TP) restrict variation to 95 V to 105 V, providing tighter voltage regulation. Selection depends on circuit requirements for voltage accuracy.

Q: Are the automotive-grade parts (SML4764HE3_A/I and SML4764AHE3_A/H) required for all applications?

A: Automotive-grade qualification (AEC-Q101) is specified for applications requiring automotive reliability standards. Non-automotive applications may use any of the four substitute parts based on electrical requirements and tolerance specifications. All parts meet RoHS3 and REACH compliance requirements.

Q: Can SMAJ4764A-TP from Micro Commercial Co be used in place of Vishay parts?

A: Yes. The SMAJ4764A-TP maintains identical electrical parameters, package form factor (DO-214AC/SMA), and regulatory compliance (RoHS3, MSL 1). The primary difference is manufacturer. Selection of alternative manufacturers is appropriate when supply chain considerations or inventory availability require component sourcing from multiple suppliers.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity level?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This classification applies to all four parts and simplifies inventory management and logistics.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All substitute parts listed are supplied in Tape & Reel (TR) packaging format, maintaining compatibility with automated assembly processes and standard component handling procedures.

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