SMAJ4763A-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The SMAJ4763A-TP is a 91 V, 1 W surface mount zener diode manufactured by Micro Commercial Co in the DO-214AC (SMA) package. This component is classified as an active product and is RoHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Substitute parts are identified when equivalent electrical characteristics, mechanical packaging, and compliance certifications align with the original component specifications, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	91	V
Tolerance	±5	%
Power - Maximum	1	W
Impedance (Maximum)	250	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 69.2 V
Voltage - Forward (Maximum) @ If	1.2	V @ 100 mA
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

Substitute parts for the SMAJ4763A-TP are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Zener voltage (Nominal): 91 V
Tolerance: ±5%
Maximum power dissipation: 1 W
Maximum impedance: 250 Ohms
Reverse leakage current: 5 µA @ 69.2 V
Forward voltage: 1.2 V @ 100 mA
Operating temperature range: -65°C to 150°C
Package type: DO-214AC (SMA)
Mounting type: Surface Mount
RoHS compliance: ROHS3 Compliant
Moisture sensitivity: MSL 1 (Unlimited)

All identified substitute parts meet these electrical and mechanical specifications. Differences in manufacturer, base product number, and optional automotive qualification do not affect functional equivalence in standard applications.

Parameter Comparison

Parameter	SMAJ4763A-TP (Micro Commercial Co)	SML4763A-E3/61 (Vishay)	SML4763AHE3_A/I (Vishay)
Voltage - Zener (Nominal)	91 V	91 V	91 V
Tolerance	±5%	±5%	±5%
Power - Maximum	1 W	1 W	1 W
Impedance (Maximum)	250 Ohms	250 Ohms	250 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 69.2 V	5 µA @ 69.2 V	5 µA @ 69.2 V
Voltage - Forward (Maximum) @ If	1.2 V @ 100 mA	Not specified in input	Not specified in input
Operating Temperature Range	-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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active
Automotive Grade	Standard	Standard	AEC-Q101 Qualified

Engineering Selection Recommendations

Standard Applications: Both SML4763A-E3/61 and SML4763AHE3_A/I from Vishay General Semiconductor - Diodes Division are direct electrical and mechanical equivalents to the SMAJ4763A-TP. All three parts are active products with ROHS3 compliance and identical electrical specifications. Selection between these parts depends on application requirements and supply chain availability.

Automotive Applications: The SML4763AHE3_A/I variant includes AEC-Q101 automotive qualification, making it the appropriate choice for automotive circuit designs requiring qualified component documentation. The standard variants (SMAJ4763A-TP and SML4763A-E3/61) are suitable for non-automotive applications.

Compliance Considerations: All three parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating. No compliance trade-offs exist between the main part and substitute options.

Frequently Asked Questions (FAQ)

Q: Can SML4763A-E3/61 be used as a direct replacement for SMAJ4763A-TP? A: Yes. Both parts share identical electrical specifications (91 V nominal zener voltage, ±5% tolerance, 1 W maximum power, 250 Ohms maximum impedance) and are packaged in DO-214AC (SMA) surface mount format. The parts are functionally interchangeable.

Q: What is the difference between SML4763A-E3/61 and SML4763AHE3_A/I? A: Both parts have identical electrical and mechanical specifications. The SML4763AHE3_A/I includes AEC-Q101 automotive qualification, while SML4763A-E3/61 is a standard industrial grade variant. Selection depends on whether automotive qualification is required for the application.

Q: Are all substitute parts in the same package? A: Yes. All three parts (SMAJ4763A-TP, SML4763A-E3/61, and SML4763AHE3_A/I) use the DO-214AC (SMA) surface mount package with identical pinout and footprint compatibility.

Q: Do the substitute parts have the same operating temperature range? A: Yes. All parts operate across the -65°C to 150°C temperature range with identical thermal specifications.

Q: What compliance certifications apply to all substitute options? A: All parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. The SML4763AHE3_A/I additionally carries AEC-Q101 automotive qualification.

Q: Can these parts be used interchangeably in PCB designs? A: Yes. Identical DO-214AC (SMA) packaging ensures footprint and pinout compatibility. No PCB layout modifications are required when substituting between these parts.

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