1N5231 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5231 is a through-hole zener diode rated at 5.1 V nominal with 500 mW power dissipation in a DO-35 axial package. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design and procurement requirements. The 1N5231 operates across a temperature range up to 200°C and is suitable for voltage regulation and protection applications in electronic circuits.

Substiute Parts

1N5231

SMC Diode SolutionsIn Stock: 7471N5231 Datasheet

Current PartRFQ

1N5231B TR PBFREE

Central Semiconductor CorpIn Stock: 52421N5231B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5231 is determined by electrical and mechanical parameter alignment within the zener diode category. The critical parameters governing substitution are:

Electrical Parameters:

• Zener voltage nominal rating: 5.1 V
• Maximum power dissipation: 500 mW
• Maximum impedance: 17 Ohms
• Reverse leakage current: 5 µA @ 2 V
• Forward voltage: 1.1 V @ 200 mA

Mechanical Parameters:

• Package type: DO-35 axial through-hole configuration
• Operating temperature capability: minimum 200°C maximum

The 1N5231B TR PBFREE from Central Semiconductor Corp satisfies all electrical and mechanical requirements of the 1N5231. This substitute maintains identical nominal zener voltage, power rating, impedance, leakage current, and forward voltage specifications. The substitute operates across an extended temperature range of -65°C to 200°C, providing equivalent or superior thermal performance. The substitute is classified as active product status with RoHS3 compliance and lead-free construction, addressing obsolescence and regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

The 1N5231B TR PBFREE is the direct functional equivalent for the obsolete 1N5231. Selection of this substitute is based on the following engineering criteria:

Electrical Equivalence: All electrical parameters match the original specification exactly, including zener voltage, power dissipation, impedance, leakage current, and forward voltage characteristics.

Mechanical Compatibility: The substitute maintains identical through-hole DO-35 axial package configuration, ensuring direct mechanical compatibility in existing circuit board layouts and assembly processes.

Product Status: The substitute is classified as active product, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Regulatory Compliance: The substitute carries RoHS3 compliance and lead-free construction, meeting current environmental and regulatory requirements for electronic component procurement and manufacturing.

Temperature Performance: The substitute operates across an extended temperature range (-65°C to 200°C) that encompasses the original specification maximum of 200°C, providing equivalent or superior thermal capability.

Frequently Asked Questions (FAQ)

Q: Can the 1N5231B TR PBFREE be used as a direct replacement for the 1N5231?

A: Yes. The 1N5231B TR PBFREE provides direct functional and mechanical substitution. All electrical parameters are identical, and the package configuration is the same DO-35 axial through-hole format.

Q: What is the primary reason for substituting the 1N5231?

A: The 1N5231 is classified as obsolete product. The 1N5231B TR PBFREE is an active equivalent that ensures continued availability and supply chain reliability.

Q: Are there differences in zener voltage tolerance between the original and substitute?

A: The original 1N5231 does not specify zener voltage tolerance in the provided data. The substitute 1N5231B TR PBFREE specifies ±5% tolerance. Both maintain the same 5.1 V nominal zener voltage.

Q: Does the substitute meet current regulatory requirements?

A: Yes. The 1N5231B TR PBFREE is RoHS3 compliant and lead-free, meeting current environmental and regulatory standards for electronic component manufacturing and procurement.

Q: Is the DO-35 package configuration identical between the original and substitute?

A: Yes. Both the 1N5231 and 1N5231B TR PBFREE use the DO-35 axial through-hole package configuration, ensuring mechanical compatibility in circuit board assembly.

Q: What is the operating temperature range of the substitute?

A: The 1N5231B TR PBFREE operates from -65°C to 200°C. This range encompasses the original 1N5231 maximum operating temperature of 200°C.

Q: Are the electrical characteristics identical between the two parts?

A: Yes. The zener voltage (5.1 V), power dissipation (500 mW), impedance (17 Ohms), reverse leakage current (5 µA @ 2 V), and forward voltage (1.1 V @ 200 mA) are identical between the 1N5231 and 1N5231B TR PBFREE.