DSA35-12A Equivalent & Substitute Parts

Part Overview

The DSA35-12A is an avalanche diode rated for 1200 V DC reverse voltage with 49 A average rectified current in a DO-203AB stud mount package. Manufactured by IXYS, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for new production and field replacements.

Substiute Parts

DSA35-12A

IXYSIn Stock: 1179DSA35-12A Datasheet

Current PartRFQ

1N2288R

Microchip TechnologyIn Stock: 10871N2288R Datasheet

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VS-50PFR120

Vishay General Semiconductor - Diodes DivisionIn Stock: 852VS-50PFR120 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of rectifier diodes is determined by electrical and mechanical compatibility within the following parameters:

Critical Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed the main part specification
• Current - Average Rectified (Io): Substitute must equal or exceed the main part specification
• Voltage - Forward (Vf) (Max) @ If: Substitute must not exceed the main part specification at equivalent or higher current
• Current - Reverse Leakage @ Vr: Substitute must not exceed the main part specification
• Speed: Substitute must match or exceed recovery speed classification

Critical Mechanical Parameters:

• Mounting Type: Substitute must support identical mounting configuration
• Package / Case: Substitute must be compatible with DO-203AB, DO-5, or Stud mount form factors

Substitute parts are grouped based on their ability to meet or exceed these parameters while maintaining functional equivalence in the target application.

Parameter Comparison

Engineering Selection Recommendations

VS-50PFR120 (Vishay General Semiconductor - Diodes Division)

The VS-50PFR120 is the primary substitute for the DSA35-12A. This part meets or exceeds all critical electrical parameters: 1200 V reverse voltage rating matches the main part, 50 A average rectified current exceeds the 49 A requirement, and forward voltage of 1.4 V @ 125 A is lower than the main part specification. The part maintains identical mounting configuration (Chassis, Stud Mount) and package compatibility (DO-203AB, DO-5, Stud). The VS-50PFR120 is active in production status and carries ROHS3 compliance and REACH unaffected certification, ensuring regulatory alignment with the obsolete DSA35-12A.

1N2288R (Microchip Technology)

The 1N2288R is a secondary substitute option with limitations. While this part maintains standard recovery speed and identical mounting and package specifications, the 1000 V reverse voltage rating is below the DSA35-12A specification of 1200 V. The 40 A average rectified current is also below the 49 A requirement. The 1N2288R is suitable only for applications where the actual operating voltage and current demands are confirmed to be within its ratings. This part is active in production status and carries REACH unaffected certification.

Frequently Asked Questions (FAQ)

Q: Can the 1N2288R directly replace the DSA35-12A in all applications?

A: No. The 1N2288R has a maximum reverse voltage rating of 1000 V, which is 200 V below the DSA35-12A specification of 1200 V. Additionally, the 40 A current rating is below the 49 A requirement. The 1N2288R is suitable only for applications where operating conditions are confirmed to remain within its electrical specifications.

Q: Is the VS-50PFR120 a direct equivalent to the DSA35-12A?

A: The VS-50PFR120 meets or exceeds all critical electrical parameters of the DSA35-12A. Both parts share identical voltage ratings (1200 V), compatible current ratings (50 A vs. 49 A), matching mounting types (Chassis, Stud Mount), and compatible package configurations (DO-203AB, DO-5, Stud). The VS-50PFR120 is the recommended substitute.

Q: Are there any compliance differences between the main part and substitute parts?

A: The DSA35-12A and VS-50PFR120 both carry ROHS3 compliance and REACH unaffected certification. The 1N2288R carries REACH unaffected certification but does not specify ROHS3 status. For applications requiring ROHS3 compliance, the VS-50PFR120 is the appropriate choice.

Q: Do all three parts use the same package and mounting configuration?

A: All three parts support DO-203AB, DO-5, and Stud mount configurations. The DSA35-12A and VS-50PFR120 both specify Chassis and Stud Mount mounting types. The 1N2288R specifies Stud Mount. Physical compatibility with existing mounting hardware should be verified for the specific application.

Q: What is the temperature operating range difference between these parts?

A: The DSA35-12A operates from -40°C to 180°C. The VS-50PFR120 operates from -55°C to 180°C, providing extended low-temperature capability. The 1N2288R operates from -65°C to 200°C, offering the widest temperature range. Selection should be based on actual application temperature requirements.

Q: Why is the DSA35-12A classified as obsolete?

A: The DSA35-12A is an obsolete product from IXYS. Obsolete classification indicates that the manufacturer has discontinued production and support. Substitute parts from active manufacturers ensure continued availability and access to current production quality and compliance certifications.