1SMA4753 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1SMA4753 is an active-status zener diode manufactured by SMC Diode Solutions, rated for 36 V nominal zener voltage with 1 W maximum power dissipation. This component is designed for surface mount applications in the DO-214AC (SMA) package format. The device operates across a temperature range of -65°C to 150°C and maintains ±5% voltage tolerance. Substitute parts are identified when equivalent electrical parameters, mechanical compatibility, and regulatory compliance align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

1SMA4753

SMC Diode SolutionsIn Stock: 173721SMA4753 Datasheet

Current PartRFQ

SMAJ4753A-TP

Micro Commercial CoIn Stock: 6326SMAJ4753A-TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1SMA4753 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Voltage - Zener (Nom): 36 V
• Tolerance: ±5%
• Power - Max: 1 W
• Impedance (Max): 50 Ohms
• Current - Reverse Leakage @ Vr: 5 µA @ 27.4 V
• Voltage - Forward (Vf) (Max): 1.2 V (at specified current)
• Operating Temperature Range: -65°C to 150°C

Mechanical Equivalence Requirements:

• Package / Case: DO-214AC (SMA)
• Mounting Type: Surface Mount

Regulatory Equivalence Requirements:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part SMAJ4753A-TP, manufactured by Micro Commercial Co, meets all electrical and mechanical parameters specified for the 1SMA4753. Both components share identical zener voltage, power rating, impedance, reverse leakage current, operating temperature range, and package format. The forward voltage specification differs only in the test current condition (100 mA vs. 200 mA), which does not affect substitution validity as both maintain the 1.2 V maximum rating. Both parts carry ROHS3 compliance and MSL 1 classification.

Parameter Comparison

Engineering Selection Recommendations

The SMAJ4753A-TP qualifies as a direct substitute for the 1SMA4753 based on complete electrical and mechanical parameter alignment. Both components are active-status products with ROHS3 compliance and MSL 1 classification, indicating equivalent regulatory standing and environmental reliability. The packaging format (DO-214AC SMA) is identical, ensuring mechanical compatibility with existing PCB layouts and assembly processes. The zener voltage, power rating, impedance, and reverse leakage specifications are fully matched, supporting equivalent circuit performance. Selection between the two parts may be based on availability, packaging format preference (Tape & Reel versus Cut Tape & Digi-Reel), or supply chain considerations, as both components deliver identical functional performance in 36 V zener diode applications.

Frequently Asked Questions (FAQ)

Q: Can SMAJ4753A-TP replace 1SMA4753 in existing designs?

A: Yes. The SMAJ4753A-TP meets all electrical specifications (36 V zener voltage, 1 W power rating, 50 Ohms impedance, 5 µA reverse leakage, 1.2 V forward voltage) and mechanical requirements (DO-214AC SMA package, surface mount) of the 1SMA4753. Both components operate across -65°C to 150°C and carry ROHS3 compliance.

Q: What is the difference in packaging between these parts?

A: The 1SMA4753 is supplied in Tape & Reel (TR) format, while the SMAJ4753A-TP is available in Cut Tape (CT) & Digi-Reel format. Both formats contain the same component in the DO-214AC (SMA) package; the difference is in the delivery and handling method for assembly operations.

Q: Are the forward voltage specifications identical?

A: Both parts specify a maximum forward voltage of 1.2 V. The test current differs (200 mA for 1SMA4753 versus 100 mA for SMAJ4753A-TP), but this does not affect substitution validity as both maintain the same maximum rating.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 1SMA4753 and SMAJ4753A-TP are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity classification, ensuring equivalent environmental and regulatory standing.

Q: What parameters must match for a zener diode to be considered a substitute?

A: Critical matching parameters include nominal zener voltage, voltage tolerance, maximum power dissipation, impedance, reverse leakage current, forward voltage rating, operating temperature range, package format, and mounting type. Regulatory compliance (RoHS status) and moisture sensitivity level must also align.