1N5231 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5231 is an active-status Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. This component operates as a 5.1 V nominal Zener diode with 500 mW maximum power dissipation in a through-hole DO-35 (DO-204AH) axial package. The 1N5231 is widely used in voltage reference and regulation circuits where stable reverse-bias voltage control is required. Substitute parts are identified when equivalent electrical parameters and mechanical compatibility are maintained across the same functional category, enabling seamless integration into existing designs and procurement workflows.

Substiute Parts

1N5231

Microchip TechnologyIn Stock: 7561N5231 Datasheet

Current PartRFQ

1N5231B

Microchip TechnologyIn Stock: 154671N5231B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1N5231 are identified based on strict electrical and mechanical parameter equivalence. The primary substitution criterion is the maintenance of identical or functionally equivalent specifications across the following key parameters:

Zener voltage nominal rating (5.1 V), tolerance band (±5%), maximum power dissipation (500 mW), maximum impedance (17 Ohms), reverse leakage current (5 µA), forward voltage characteristics (1.5 V @ 200 mA), operating temperature range (-65°C to 175°C), and package configuration (DO-35 axial through-hole). Parts meeting these criteria are classified as parametric equivalents and direct substitutes. The 1N5231B is identified as a parametric equivalent based on complete alignment with all specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the 1N5231 and 1N5231B are active-status components manufactured by Microchip Technology with identical REACH and export control classifications (REACH Unaffected, EAR99). The 1N5231B is a direct parametric equivalent suitable for applications requiring the 1N5231 specification. Selection between these parts is determined by availability, packaging format (the 1N5231 is supplied in tape/reel format while the 1N5231B is supplied in bulk), and inventory requirements. Both components comply with the same regulatory framework and carry equivalent technical certifications. The reverse leakage current measurement point differs slightly (1.9 V for 1N5231 versus 2.0 V for 1N5231B), but both maintain the 5 µA specification within their respective test conditions, confirming functional equivalence for voltage regulation applications.

Frequently Asked Questions (FAQ)

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

A: Yes. The 1N5231B is a parametric equivalent with identical Zener voltage (5.1 V), tolerance (±5%), power rating (500 mW), impedance (17 Ohms), forward voltage characteristics, operating temperature range, and package configuration (DO-35 axial through-hole). Both components are manufactured by Microchip Technology and carry the same regulatory certifications.

Q: What is the difference between the 1N5231 and 1N5231B?

A: The primary difference is packaging format. The 1N5231 is supplied in tape/reel format, while the 1N5231B is supplied in bulk packaging. The reverse leakage current test condition differs slightly (1.9 V versus 2.0 V), but both maintain 5 µA leakage specification. All electrical and mechanical parameters are equivalent.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the 1N5231 and 1N5231B carry identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8541.10.0050). Both are active-status products with equivalent regulatory standing.

Q: What applications are these Zener diodes suitable for?

A: The 1N5231 and 1N5231B are designed for voltage regulation and reference applications. The 5.1 V nominal Zener voltage, 500 mW power rating, and 17 Ohm maximum impedance make these components suitable for low-power voltage stabilization circuits, reference voltage generation, and transient suppression in 5 V logic systems.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Both components use the DO-35 axial through-hole package with identical pin configuration and mechanical dimensions. They are directly interchangeable in through-hole PCB layouts without design modification.

Q: What is the operating temperature range for these components?

A: Both the 1N5231 and 1N5231B operate across a junction temperature range of -65°C to 175°C (TJ), providing stable Zener voltage regulation across industrial and extended temperature applications.