1N4743A_S00Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4743A_S00Z is a 13 V, 1 W Zener diode manufactured by onsemi in a DO-41 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The part operates across a temperature range of -65°C to 200°C and maintains ±5% voltage tolerance with a maximum reverse leakage current of 5 µA at 9.9 V.

Substiute Parts

1N4743A_S00Z

onsemiIn Stock: 11531N4743A_S00Z Datasheet

Current PartRFQ

1N4743A

Lumimax Optoelectronic TechnologyIn Stock: 1503911N4743A Datasheet

SimilarRFQ

1N4743A BK PBFREE

Central Semiconductor CorpIn Stock: 7621N4743A BK PBFREE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N4743A_S00Z is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Voltage - Zener (Nominal): 13 V
• Power - Maximum: 1 W
• Tolerance: ±5%
• Impedance (Maximum): 10 Ohms
• Current - Reverse Leakage @ Vr: 5 µA @ 9.9 V
• Operating Temperature Range: -65°C to 200°C
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial

All identified substitute parts maintain identical electrical specifications and package compatibility with the original 1N4743A_S00Z. Substitutes are grouped based on active product status and regulatory compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

1N4743A (Lumimax Optoelectronic Technology)

This substitute maintains full electrical and mechanical equivalence to the 1N4743A_S00Z. The part is active in production with RoHS compliance certification. Lumimax supplies this component in DO-41G package configuration with 150,300 units currently in stock. This option is suitable for applications requiring RoHS-compliant alternatives with established supply availability.

1N4743A BK PBFREE (Central Semiconductor Corp)

This substitute provides parametric equivalence with ROHS3 compliance certification, exceeding baseline RoHS requirements. The part is active in production and supplied in bulk packaging. Central Semiconductor maintains 661 units in stock. The PBFREE designation indicates lead-free construction, meeting stringent environmental and regulatory standards. This option is appropriate for applications with enhanced environmental compliance requirements.

Both substitutes are active products with REACH Unaffected status, ensuring regulatory compliance across international markets. Selection between alternatives depends on specific supply chain requirements, packaging preferences, and compliance certifications mandated by end-use applications.

Frequently Asked Questions (FAQ)

Q: Can the 1N4743A from Lumimax directly replace the obsolete 1N4743A_S00Z?

A: Yes. Both parts maintain identical electrical specifications: 13 V nominal Zener voltage, 1 W maximum power dissipation, ±5% tolerance, 10 Ohms maximum impedance, and 5 µA reverse leakage current at 9.9 V. Both use DO-41 through-hole axial packages. The Lumimax part is active in production, addressing the obsolescence of the original onsemi component.

Q: What is the difference between the Lumimax 1N4743A and the Central Semiconductor 1N4743A BK PBFREE?

A: Both parts are electrically and mechanically equivalent. The primary differences are manufacturer identity, packaging format (Lumimax in standard DO-41G versus Central Semiconductor in bulk), and compliance certifications. Central Semiconductor's PBFREE designation indicates lead-free construction with ROHS3 compliance, while Lumimax provides RoHS compliance. Both maintain REACH Unaffected status.

Q: Are there package compatibility concerns when substituting these parts?

A: No. All three parts use DO-204AL, DO-41, and Axial package designations. The through-hole mounting type is identical across all alternatives, ensuring direct mechanical compatibility in existing PCB layouts without modification.

Q: What regulatory certifications apply to these substitute parts?

A: The Lumimax 1N4743A holds RoHS Compliant certification. The Central Semiconductor 1N4743A BK PBFREE holds ROHS3 Compliant certification. Both parts maintain REACH Unaffected status. All three parts share identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications.

Q: Which substitute should be selected for new production designs?

A: Selection depends on compliance requirements and supply chain preferences. For standard RoHS compliance, the Lumimax 1N4743A is suitable with higher inventory availability (150,300 units). For enhanced environmental compliance and lead-free construction, the Central Semiconductor 1N4743A BK PBFREE with ROHS3 certification is appropriate. Both are active products with established supply chains.

Q: Are the electrical performance characteristics identical across all three parts?

A: Yes. All three parts maintain identical Zener voltage (13 V), power rating (1 W), tolerance (±5%), impedance (10 Ohms maximum), reverse leakage current (5 µA @ 9.9 V), and operating temperature range (-65°C to 200°C). Electrical performance is fully interchangeable.