1N4730A TR Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4730A TR is a 3.9 V, 1 W Zener diode manufactured by Central Semiconductor Corp in DO-41 axial through-hole packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and is suitable for voltage regulation and protection applications in electronic circuits.

Substiute Parts

1N4730A TR

Central Semiconductor CorpIn Stock: 54921N4730A TR Datasheet

Current PartRFQ

1N4729A,113

Nexperia USA Inc.In Stock: 105691N4729A,113 Datasheet

DirectRFQ

1N4730A,113

Nexperia USA Inc.In Stock: 84811N4730A,113 Datasheet

DirectRFQ

1N4730G

Taiwan Semiconductor CorporationIn Stock: 6891N4730G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N4730A TR is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Zener voltage (Vz): 3.9 V nominal with ±5% tolerance
• Power dissipation rating: 1 W maximum
• Impedance (Zzt): 9 Ohms maximum
• Reverse leakage current: 50 µA @ 1 V
• Forward voltage: 1.2 V maximum @ 200 mA
• Operating temperature range: -65°C to 200°C
• Package type: DO-41 axial through-hole configuration

Substitute parts are grouped into two categories based on manufacturer and product status:

Direct Manufacturer Substitutes (Active Status): Parts with identical electrical specifications and active product status from alternative manufacturers.

Parametric Equivalents (Active Status): Parts with matching electrical parameters and active product status, with potential packaging variations within the DO-41 family.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 1N4730A,113 (Nexperia USA Inc.)

The 1N4730A,113 is the direct equivalent substitute for the obsolete 1N4730A TR. This part maintains identical electrical specifications across all critical parameters: 3.9 V nominal Zener voltage, 1 W power rating, 9 Ohms maximum impedance, and 50 µA reverse leakage current. The part is in active production status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. Packaging is DO-41 axial through-hole, providing direct mechanical compatibility.

Secondary Substitute: 1N4730G (Taiwan Semiconductor Corporation)

The 1N4730G provides parametric equivalence with identical electrical specifications to the primary substitute. This part is in active production status with ROHS3 compliance. The supplier device package is specified as DO-204AL (DO-41), maintaining mechanical compatibility. Inventory availability is lower than the primary substitute.

Not Recommended for Direct Substitution: 1N4729A,113 (Nexperia USA Inc.)

The 1N4729A,113 has a nominal Zener voltage of 3.6 V, which differs from the required 3.9 V specification. Additionally, the reverse leakage current is specified at 100 µA @ 1 V, compared to the 50 µA requirement. While this part shares the same 1 W power rating and DO-41 package, the voltage and leakage specifications place it outside the acceptable substitution parameters for this application.

Frequently Asked Questions (FAQ)

Q: Can the 1N4729A,113 be used as a substitute for the 1N4730A TR?

A: No. The 1N4729A,113 has a nominal Zener voltage of 3.6 V, which does not meet the 3.9 V requirement of the 1N4730A TR. Additionally, its reverse leakage current of 100 µA @ 1 V exceeds the 50 µA specification. These differences place it outside acceptable substitution parameters.

Q: What is the difference between the 1N4730A,113 and 1N4730G?

A: Both parts have identical electrical specifications: 3.9 V Zener voltage, 1 W power rating, 9 Ohms impedance, and 50 µA reverse leakage current. The primary difference is manufacturer: 1N4730A,113 is from Nexperia USA Inc., while 1N4730G is from Taiwan Semiconductor Corporation. Both are in active production with ROHS3 compliance. Inventory availability differs between suppliers.

Q: Are the 1N4730A,113 and 1N4730G mechanically compatible with the original 1N4730A TR?

A: Yes. Both substitute parts use DO-41 axial through-hole packaging, which is mechanically identical to the original part. Direct board-level substitution is possible without design modification.

Q: Why is the original 1N4730A TR listed as obsolete?

A: The 1N4730A TR from Central Semiconductor Corp is classified as obsolete, indicating it is no longer in active production. Active equivalent parts from Nexperia USA Inc. and Taiwan Semiconductor Corporation are available to ensure design continuity and production support.

Q: What compliance certifications should I verify for substitute parts?

A: All recommended substitute parts carry ROHS3 compliance certification and REACH Unaffected status, matching the regulatory requirements of the original part. These certifications ensure compliance with current environmental and hazardous substance regulations.

Q: Can I use either the 1N4730A,113 or 1N4730G interchangeably?

A: Yes. Both parts meet identical electrical and mechanical specifications for the 1N4730A TR application. Selection between them can be based on supplier availability, lead time, and inventory levels.