1N5239 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5239 is a through-hole zener diode rated at 9.1 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 support and procurement. The 1N5239 operates across a temperature range up to 200°C and is suitable for voltage regulation and protection applications in electronic circuits.

Substiute Parts

1N5239

SMC Diode SolutionsIn Stock: 54601N5239 Datasheet

Current PartRFQ

1N5239B TR PBFREE

Central Semiconductor CorpIn Stock: 95171N5239B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5239 is determined by electrical and mechanical parameter equivalence. The primary substitution criteria are:

Electrical Parameters:

• Zener voltage: 9.1 V nominal
• Maximum power dissipation: 500 mW
• Maximum impedance: 10 Ohms
• Reverse leakage current: 3 µA @ 7 V
• Forward voltage: 1.1 V @ 200 mA

Mechanical Parameters:

• Package type: DO-35 axial through-hole configuration
• Mounting: Through-hole compatible with DO-204AH footprint

Compliance & Status:

• Active product status for ongoing availability
• REACH compliance status: REACH Unaffected
• ECCN classification: EAR99
• HTSUS code: 8541.10.0050

The 1N5239B TR PBFREE from Central Semiconductor Corp meets all electrical and mechanical requirements and maintains identical parameter specifications while offering active product status and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The 1N5239B TR PBFREE from Central Semiconductor Corp is a direct electrical and mechanical equivalent to the obsolete 1N5239. Selection of this substitute is based on the following factors:

Electrical Equivalence: All critical electrical parameters match the original specification, including zener voltage (9.1 V), power rating (500 mW), impedance (10 Ohms maximum), reverse leakage current (3 µA @ 7 V), and forward voltage (1.1 V @ 200 mA).

Mechanical Compatibility: The DO-35 axial through-hole package is identical, ensuring direct PCB footprint compatibility without layout modifications.

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

Compliance Enhancement: The 1N5239B TR PBFREE carries RoHS3 compliance certification, exceeding the compliance profile of the original part. Both parts maintain REACH Unaffected status and identical ECCN and HTSUS classifications.

Tolerance Specification: The substitute provides a defined zener voltage tolerance of ±5%, whereas the original part does not specify tolerance. This represents a measurable improvement in voltage regulation precision.

Temperature Range: The substitute extends the minimum operating temperature to -65°C, providing broader environmental operating capability while maintaining the 200°C maximum temperature rating.

Frequently Asked Questions (FAQ)

Q: Can the 1N5239B TR PBFREE be used as a direct replacement for the 1N5239?

A: Yes. The 1N5239B TR PBFREE meets all electrical and mechanical specifications of the 1N5239. Both components share identical zener voltage (9.1 V), power rating (500 mW), impedance (10 Ohms), reverse leakage current (3 µA @ 7 V), forward voltage (1.1 V @ 200 mA), and DO-35 axial through-hole package configuration. No circuit modifications or PCB layout changes are required.

Q: What is the primary reason to substitute the 1N5239?

A: The 1N5239 is classified as obsolete, which creates supply chain risk and limits procurement options. The 1N5239B TR PBFREE is an active product with confirmed inventory availability and ongoing manufacturer support, ensuring reliable component sourcing for new designs and production runs.

Q: Are there packaging differences between the 1N5239 and 1N5239B TR PBFREE?

A: No. Both components use the DO-35 axial through-hole package (DO-204AH designation). The physical dimensions, lead configuration, and PCB mounting footprint are identical. The substitute is supplied in cut tape (CT) packaging format, which is standard for active production components.

Q: Does the 1N5239B TR PBFREE meet RoHS requirements?

A: Yes. The 1N5239B TR PBFREE is RoHS3 compliant. The original 1N5239 does not specify RoHS status. This compliance certification is relevant for applications subject to RoHS directives in the European Union and equivalent regulatory frameworks.

Q: What is the zener voltage tolerance of the substitute part?

A: The 1N5239B TR PBFREE specifies a zener voltage tolerance of ±5% at the 9.1 V nominal rating. The original 1N5239 does not provide a tolerance specification. This defined tolerance supports more precise voltage regulation in circuit applications.

Q: Is the operating temperature range different between the two parts?

A: The maximum operating temperature is identical at 200°C for both parts. The 1N5239B TR PBFREE extends the minimum operating temperature to -65°C, whereas the original 1N5239 does not specify a minimum temperature. This provides the substitute with a broader usable temperature range for cold-environment applications.

Q: Are there any compliance or export restrictions associated with the substitute?

A: No. The 1N5239B TR PBFREE carries the same ECCN classification (EAR99) and HTSUS code (8541.10.0050) as the original part. Both components maintain REACH Unaffected status. No additional compliance documentation or export licensing is required for the substitute.

Q: What is the reverse leakage current specification?

A: Both the 1N5239 and 1N5239B TR PBFREE specify a reverse leakage current of 3 µA measured at 7 V reverse bias. This parameter is identical across both components.

Q: Can the 1N5239B TR PBFREE be used in high-temperature applications?

A: Yes. The 1N5239B TR PBFREE maintains a maximum operating temperature of 200°C, identical to the original 1N5239. This rating supports applications requiring operation in elevated-temperature environments, including automotive and industrial circuits.