DSA35-16A Equivalent & Substitute Parts

Part Overview

The DSA35-16A is an avalanche diode rated for 1600 V DC reverse voltage with 49 A average rectified current in a DO-203AB chassis stud mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance within the specified voltage and current parameters while accommodating the same mechanical mounting configuration.

Substiute Parts

DSA35-16A

IXYSIn Stock: 5318DSA35-16A Datasheet

Current PartRFQ

VS-50PFR160

Vishay General Semiconductor - Diodes DivisionIn Stock: 848VS-50PFR160 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSA35-16A is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must maintain a DC reverse voltage rating of 1600 V to ensure equivalent blocking capability in the application circuit.

Current Rating: The substitute part must support a minimum average rectified current of 49 A. Parts rated at 50 A or higher satisfy this requirement.

Recovery Speed: The substitute part must operate at standard recovery speeds exceeding 500 ns at currents greater than 200 mA to maintain switching characteristics.

Mounting Configuration: The substitute part must utilize the same DO-203AB chassis stud mount package to ensure mechanical compatibility with existing PCB layouts and thermal management systems.

Compliance: The substitute part must maintain ROHS3 compliance and REACH unaffected status to satisfy regulatory requirements.

The VS-50PFR160 meets all substitution criteria through equivalent voltage and current ratings, identical package configuration, and matching recovery speed specifications.

Parameter Comparison

Engineering Selection Recommendations

The VS-50PFR160 is a direct substitute for the DSA35-16A based on the following engineering criteria:

Electrical Equivalence: Both parts maintain identical 1600 V reverse voltage ratings and standard recovery speed characteristics. The VS-50PFR160 provides 50 A current capacity, which exceeds the DSA35-16A requirement of 49 A, ensuring adequate margin for the application.

Mechanical Compatibility: Both components utilize the DO-203AB chassis stud mount package, enabling direct replacement without PCB layout modifications or thermal management redesign.

Regulatory Compliance: The VS-50PFR160 maintains ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the original part.

Product Status: The VS-50PFR160 is classified as active, ensuring long-term availability and supply chain continuity compared to the obsolete DSA35-16A.

Operating Temperature Consideration: The VS-50PFR160 supports a lower minimum junction temperature of -55°C compared to the DSA35-16A at -40°C, providing extended cold-temperature operation capability. The maximum junction temperature of 160°C for the VS-50PFR160 is 20°C lower than the DSA35-16A at 180°C; applications operating near the upper thermal limit require verification of thermal management adequacy.

Frequently Asked Questions (FAQ)

Q: Can the VS-50PFR160 directly replace the DSA35-16A in existing designs?

A: Yes. The VS-50PFR160 provides equivalent voltage and current ratings, identical package configuration, and matching recovery speed specifications. No circuit modifications are required for electrical substitution.

Q: What is the significance of the 1 A difference in current rating between the two parts?

A: The VS-50PFR160 is rated at 50 A average rectified current, compared to 49 A for the DSA35-16A. This 1 A increase provides additional current capacity margin and does not create compatibility issues in applications designed for the original 49 A specification.

Q: Are there thermal management differences between these parts?

A: The VS-50PFR160 operates to a maximum junction temperature of 160°C, while the DSA35-16A operates to 180°C. Applications requiring operation near 180°C must evaluate whether the lower thermal ceiling of the substitute part accommodates the thermal design. The VS-50PFR160 supports lower minimum temperatures at -55°C compared to -40°C for the original part.

Q: Do both parts use the same package footprint?

A: Yes. Both the DSA35-16A and VS-50PFR160 utilize the DO-203AB, DO-5 stud mount package. Mechanical mounting and thermal interface requirements are identical.

Q: What is the difference between avalanche and standard reverse polarity diode technology?

A: The DSA35-16A uses avalanche diode technology, while the VS-50PFR160 uses standard reverse polarity technology. Both technologies support the specified 1600 V reverse voltage rating and standard recovery speed characteristics required for this application category.

Q: Are compliance certifications equivalent between the two parts?

A: Yes. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying identical regulatory requirements.

Q: Why is the DSA35-16A classified as obsolete?

A: The DSA35-16A is no longer in active production. The VS-50PFR160 provides equivalent electrical and mechanical performance with active product status, ensuring ongoing availability and supply chain support.