DSA17-16A Equivalent & Substitute Parts

Part Overview

The DSA17-16A is an avalanche diode rated for 1600 V DC reverse voltage with 25 A average rectified current, manufactured by IXYS in a DO-203AA chassis stud mount package. This component is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing system support and procurement planning. The part operates across a junction temperature range of -40°C to 180°C and complies with ROHS3 and REACH standards.

Substiute Parts

DSA17-16A

IXYSIn Stock: 1131DSA17-16A Datasheet

Current PartRFQ

VS-40HFR160

Vishay General Semiconductor - Diodes DivisionIn Stock: 1243VS-40HFR160 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSA17-16A is determined by the following critical parameters:

Voltage Rating: The substitute part must maintain the 1600 V DC reverse voltage specification to ensure circuit protection and reliability in the intended application.

Current Rating: The substitute part current capacity must equal or exceed the 25 A average rectified current requirement. The VS-40HFR160 provides 40 A capacity, which exceeds the minimum requirement.

Mounting Configuration: Both the main part and substitute must support chassis stud mount installation to ensure mechanical compatibility with existing hardware.

Package Type: The substitute must use a compatible stud mount package (DO-203AA, DO-203AB, or equivalent DO-4/DO-5 variants) to fit existing mounting structures.

Recovery Speed: Both parts must operate at standard recovery speeds (>500ns, >200mA) to maintain consistent switching characteristics.

Compliance Standards: The substitute must meet ROHS3 and REACH requirements to satisfy regulatory and procurement specifications.

Parameter Comparison

Engineering Selection Recommendations

The VS-40HFR160 serves as a functional substitute for the obsolete DSA17-16A based on the following engineering criteria:

Voltage Compatibility: Both parts are rated for 1600 V DC reverse voltage, ensuring equivalent circuit protection performance.

Current Capacity: The VS-40HFR160 provides 40 A average rectified current, which exceeds the DSA17-16A requirement of 25 A. This higher rating provides operational margin without compromising circuit function.

Mechanical Compatibility: Both parts feature chassis stud mount configurations, allowing direct installation into existing mounting structures. Package variants (DO-203AA versus DO-203AB) are mechanically compatible within stud mount applications.

Regulatory Compliance: The VS-40HFR160 maintains ROHS3 and REACH compliance, satisfying current procurement and environmental standards.

Product Availability: The VS-40HFR160 holds active product status with 1210 units in stock, providing reliable long-term availability compared to the obsolete DSA17-16A.

Operating Temperature Consideration: The VS-40HFR160 operates across -65°C to 160°C, which encompasses the lower temperature bound of the DSA17-16A (-40°C) but does not extend to the upper temperature limit (180°C). Applications requiring operation above 160°C junction temperature require alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the VS-40HFR160 directly replace the DSA17-16A in all applications?

A: The VS-40HFR160 is electrically compatible for applications operating within the junction temperature range of -65°C to 160°C. Applications requiring junction temperatures above 160°C require alternative components. The higher current rating (40 A versus 25 A) does not prevent substitution and provides operational margin.

Q: What are the mechanical differences between DO-203AA and DO-203AB packages?

A: Both packages are stud mount configurations compatible with chassis mounting. DO-203AA and DO-203AB are variant designations within the DO-4/DO-5 stud mount family. Physical mounting compatibility is maintained across these variants.

Q: How do the forward voltage characteristics compare?

A: The DSA17-16A specifies 1.36 V forward voltage at 55 A, while the VS-40HFR160 specifies 1.5 V at 125 A. Forward voltage varies with current; direct comparison at identical current levels is not provided in the specifications. Both values fall within acceptable ranges for standard rectifier applications.

Q: Are there compliance or certification differences?

A: Both parts comply with ROHS3 and REACH standards. The VS-40HFR160 includes Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), while the DSA17-16A lists MSL as Not Applicable. This difference does not affect substitution suitability.

Q: What is the significance of the reverse leakage current difference?

A: The DSA17-16A specifies 4 mA reverse leakage at 1600 V, while the VS-40HFR160 specifies 4.5 mA at the same voltage. This 0.5 mA difference is within acceptable tolerance for standard rectifier applications and does not prevent substitution.

Q: Why is the DSA17-16A classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by IXYS. The VS-40HFR160 provides equivalent electrical function with active product status and ongoing manufacturer support.