SML4763A-E3/5A Zener Diode Equivalent & Substitute Parts

Part Overview

The SML4763A-E3/5A is an active-status 91 V, 1 W surface mount zener diode manufactured by Vishay General Semiconductor - Diodes Division in DO-214AC (SMA) package. This component is designed for voltage regulation and protection applications requiring precise zener voltage control at 91 V nominal with ±5% tolerance. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to component availability, supply chain considerations, or design flexibility within the same functional specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	91	V
Tolerance	±5	%
Power - Max	1	W
Impedance (Max)	250	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 69.2 V
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount
Package / Case	DO-214AC (SMA)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SML4763A-E3/5A are classified based on strict parametric equivalence within the following criteria:

Primary Substitution Criteria:

Voltage - Zener (Nom): 91 V
Tolerance: ±5%
Power - Max: 1 W
Package / Case: DO-214AC (SMA)
Mounting Type: Surface Mount
Operating Temperature Range: -65°C to 150°C (minimum)

Parametric Equivalent Parts maintain all primary substitution criteria and are directly interchangeable in circuit applications with identical electrical performance specifications.

Manufacturer Recommended Parts may include variations in secondary parameters (impedance, reverse leakage current, forward voltage) while maintaining core zener voltage and power ratings. These parts are suitable for applications where the primary electrical specifications are the controlling design factors.

Parameter Comparison

Parameter	SML4763A-E3/5A	SML4763A-E3/61	SML4763AHE3_A/I	SMAJ4763A-TP	3SMAJ5948B-TP
Manufacturer	Vishay	Vishay	Vishay	Micro Commercial Co	Micro Commercial Co
Voltage - Zener (Nom)	91 V	91 V	91 V	91 V	91 V
Tolerance	±5%	±5%	±5%	±5%	±5%
Power - Max	1 W	1 W	1 W	1 W	3 W
Impedance (Max)	250 Ohms	250 Ohms	250 Ohms	250 Ohms	200 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 69.2 V	5 µA @ 69.2 V	5 µA @ 69.2 V	5 µA @ 69.2 V	1 µA @ 69.2 V
Operating Temperature Range	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-55 to 150°C
Package / Case	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active
Automotive Grade	Standard	Standard	AEC-Q101	Standard	Standard

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for 1:1 Substitution):

SML4763A-E3/61, SML4763AHE3_A/I, and SMAJ4763A-TP are parametric equivalents to the SML4763A-E3/5A. These parts maintain identical zener voltage (91 V), tolerance (±5%), power rating (1 W), impedance (250 Ohms), reverse leakage current (5 µA @ 69.2 V), operating temperature range (-65°C to 150°C), and package configuration (DO-214AC SMA). All parts are ROHS3 compliant and active-status products.

SML4763AHE3_A/I includes AEC-Q101 automotive qualification, making it suitable for applications requiring automotive-grade component certification.

Manufacturer Recommended Alternative:

3SMAJ5948B-TP is a manufacturer-recommended substitute with the same 91 V zener voltage and ±5% tolerance. This part differs in power rating (3 W versus 1 W), impedance (200 Ohms versus 250 Ohms), and reverse leakage current (1 µA versus 5 µA @ 69.2 V). The 3 W power rating provides increased thermal capability. The operating temperature minimum is -55°C (versus -65°C). This part is suitable for applications where higher power dissipation capacity is beneficial within the same voltage regulation specification.

All substitute parts are active-status products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can SML4763A-E3/61 be used as a direct replacement for SML4763A-E3/5A?

A: Yes. SML4763A-E3/61 is a parametric equivalent with identical electrical specifications: 91 V zener voltage, ±5% tolerance, 1 W power rating, 250 Ohms impedance, 5 µA reverse leakage current, and -65°C to 150°C operating temperature range. Both use DO-214AC (SMA) surface mount packaging. The difference is in packaging format (tape & reel designation).

Q: What is the difference between the Vishay SML4763 series and the Micro Commercial Co SMAJ4763A-TP?

A: Both parts are parametric equivalents with identical core specifications: 91 V zener voltage, ±5% tolerance, 1 W power rating, 250 Ohms impedance, 5 µA reverse leakage current, and -65°C to 150°C operating temperature. The primary difference is manufacturer. Both are ROHS3 compliant and active-status products in DO-214AC (SMA) packaging.

Q: When should 3SMAJ5948B-TP be selected instead of SML4763A-E3/5A?

A: 3SMAJ5948B-TP is selected when the application requires higher power dissipation capability. This part provides 3 W power rating compared to 1 W in the SML4763A-E3/5A, while maintaining the same 91 V zener voltage and ±5% tolerance. The impedance is lower (200 Ohms versus 250 Ohms) and reverse leakage current is lower (1 µA versus 5 µA @ 69.2 V). The operating temperature minimum is -55°C instead of -65°C. Both use identical DO-214AC (SMA) surface mount packaging.

Q: Is SML4763AHE3_A/I suitable for automotive applications?

A: Yes. SML4763AHE3_A/I carries AEC-Q101 automotive qualification and is designated as automotive-grade. It maintains all parametric equivalence to SML4763A-E3/5A (91 V, ±5%, 1 W, 250 Ohms impedance, 5 µA reverse leakage, -65°C to 150°C operating range) while meeting automotive industry standards.

Q: Are all substitute parts available in the same DO-214AC (SMA) package?

A: Yes. All substitute parts listed (SML4763A-E3/61, SML4763AHE3_A/I, SMAJ4763A-TP, and 3SMAJ5948B-TP) are supplied in DO-214AC (SMA) surface mount package configuration. Footprint and land pattern compatibility is maintained across all substitutes.

Q: What is the significance of the ±5% tolerance specification?

A: The ±5% tolerance indicates the maximum deviation of the actual zener voltage from the nominal 91 V specification. This tolerance applies across all listed substitute parts and is a critical parameter for voltage regulation and protection circuit design. All parts maintain this tolerance specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts (SML4763A-E3/61, SML4763AHE3_A/I, SMAJ4763A-TP, and 3SMAJ5948B-TP) are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1) rating.

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