DSA2-12A Equivalent & Substitute Parts

Part Overview

The DSA2-12A is an avalanche diode manufactured by IXYS, rated for 1200 V DC reverse voltage with 3.6 A average rectified current. This component is designed for through-hole axial mounting and operates across a junction temperature range of -40°C to 180°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

DSA2-12A

IXYSIn Stock: 1488DSA2-12A Datasheet

Current PartRFQ

BY228-15TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 1347BY228-15TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSA2-12A is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute must maintain a DC reverse voltage rating of 1200 V to ensure equivalent circuit protection and voltage handling capability.

Current Rating: The substitute current rating must be sufficient to handle the application's average rectified current requirements. The DSA2-12A specifies 3.6 A; substitutes with equal or greater current capacity are acceptable.

Technology: Both the main part and substitute must employ avalanche diode technology to maintain identical electrical behavior and reverse voltage characteristics.

Mounting and Package: The substitute must support through-hole mounting. While the DSA2-12A uses axial packaging, substitutes in compatible through-hole packages (such as SOD-64 axial) are acceptable provided mechanical fit is verified for the application.

Recovery Speed: Standard recovery characteristics (>500ns, >200mA) must be maintained to preserve circuit timing and switching performance.

Compliance: RoHS3 compliance and REACH unaffected status ensure regulatory alignment across both parts.

Parameter Comparison

Engineering Selection Recommendations

The BY228-15TR from Vishay General Semiconductor - Diodes Division serves as an active equivalent for the obsolete DSA2-12A. Both components share identical 1200 V reverse voltage ratings, avalanche technology, standard recovery speed characteristics, through-hole mounting, and RoHS3 compliance.

Selection of the BY228-15TR is appropriate when the application current requirement does not exceed 3 A. The substitute's significantly lower reverse leakage current (5 µA versus 2 mA) provides improved performance in high-impedance circuit applications.

Design verification is required for applications operating at junction temperatures above 140°C, as the BY228-15TR specifies a maximum junction temperature of 140°C compared to the DSA2-12A's 180°C rating. Forward voltage characteristics differ between the parts; circuit designs with tight voltage margin specifications require validation.

Mechanical compatibility must be confirmed prior to implementation, as both parts employ axial packaging but may differ in physical dimensions and lead spacing.

Frequently Asked Questions (FAQ)

Q: Can the BY228-15TR directly replace the DSA2-12A in all applications?

A: Direct replacement is possible when application current does not exceed 3 A and junction temperature remains below 140°C. Mechanical fit verification is required due to potential dimensional differences in axial packaging. Forward voltage differences necessitate circuit margin review.

Q: What is the primary reason for substitution?

A: The DSA2-12A is classified as obsolete. The BY228-15TR is an active product with equivalent electrical specifications, ensuring continued component availability for system support and new designs.

Q: Are there compliance differences between the two parts?

A: Both parts are RoHS3 compliant and REACH unaffected. No compliance barriers exist for substitution.

Q: How do the current ratings compare?

A: The DSA2-12A is rated for 3.6 A average rectified current, while the BY228-15TR is rated for 3 A. The substitute is suitable for applications requiring 3 A or less. Applications requiring the full 3.6 A capacity must retain the original part or identify alternative sources.

Q: What packaging differences exist?

A: Both parts use axial through-hole packaging. The BY228-15TR is specified as SOD-64 axial. Physical dimensions and lead spacing may differ; mechanical fit must be verified for the specific application before implementation.

Q: How do reverse leakage characteristics affect substitution?

A: The BY228-15TR exhibits significantly lower reverse leakage (5 µA) compared to the DSA2-12A (2 mA). This improvement is favorable for high-impedance applications and does not create compatibility issues.

Q: What temperature considerations apply?

A: The DSA2-12A operates to 180°C junction temperature, while the BY228-15TR is limited to 140°C maximum. Applications requiring operation above 140°C must use the original part or identify alternative sources rated for higher temperatures.