VS-20TQ035PBF Equivalent & Substitute Parts

Part Overview

The VS-20TQ035PBF is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 35 V DC reverse voltage and 20 A average rectified current in a through-hole TO-220AC package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives for ongoing design support and procurement. Substitute parts must maintain electrical performance across voltage, current, and thermal specifications while meeting compliance and packaging requirements.

Substiute Parts

VS-20TQ035PBF

Vishay General Semiconductor - Diodes DivisionIn Stock: 1166VS-20TQ035PBF Datasheet

Current PartRFQ

VS-20TQ035-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 1014VS-20TQ035-M3 Datasheet

DirectRFQ

VS-20TQ035THN3

Vishay General Semiconductor - Diodes DivisionIn Stock: 1176VS-20TQ035THN3 Datasheet

Parametric EquivalentRFQ

20TQ035

Vishay General Semiconductor - Diodes DivisionIn Stock: 253520TQ035 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VS-20TQ035PBF is determined by equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Technology: Schottky rectifier diode
• Voltage - DC Reverse (Vr) (Max): 35 V
• Current - Average Rectified (Io): 20 A
• Mounting Type: Through Hole
• Package / Case: TO-220-2
• Operating Temperature - Junction: -55°C to 150°C

Performance Criteria:

• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 2.7 mA @ 35 V

Substitute parts are classified as direct manufacturer equivalents when all mandatory criteria and performance specifications are met. Parts with identical base product numbers (20TQ035) from Vishay General Semiconductor - Diodes Division are considered within the same product family and are evaluated for functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: VS-20TQ035-M3

The VS-20TQ035-M3 is an active product from Vishay General Semiconductor - Diodes Division with ROHS3 compliance. This part maintains all mandatory electrical parameters including 35 V reverse voltage, 20 A average rectified current, and TO-220-2 package configuration. The forward voltage specification differs (730 mV @ 40 A versus 570 mV @ 20 A on the original), reflecting measurement at different current levels. Both parts share identical reverse leakage current (2.7 mA @ 35 V) and fast recovery speed characteristics. The VS-20TQ035-M3 is available in tube packaging and maintains active product status, ensuring long-term availability.

Secondary Substitute: VS-20TQ035THN3

The VS-20TQ035THN3 is an active product offering parametric equivalence to the VS-20TQ035PBF. This part matches the original forward voltage specification (570 mV @ 20 A) and includes capacitance data (1400 pF @ 5 V, 1 MHz). ROHS3 compliance and active product status support procurement continuity. The VS-20TQ035THN3 is suitable for applications requiring exact forward voltage matching at the specified current level.

Not Recommended: 20TQ035

The base product number 20TQ035 is classified as obsolete and carries RoHS non-compliant status. While electrical parameters match the original part, the obsolete designation and non-compliance with current environmental regulations make this option unsuitable for new designs or ongoing procurement.

Frequently Asked Questions (FAQ)

Q: Can VS-20TQ035-M3 directly replace VS-20TQ035PBF in existing designs?

A: Yes. Both parts are Schottky rectifier diodes with identical voltage (35 V), current (20 A), and package specifications (TO-220-2). The forward voltage measurement difference reflects different test conditions (730 mV @ 40 A versus 570 mV @ 20 A) and does not prevent functional substitution. Both parts meet fast recovery speed and reverse leakage specifications.

Q: What is the difference between VS-20TQ035-M3 and VS-20TQ035THN3?

A: Both are active Vishay products with ROHS3 compliance and identical core electrical ratings. The VS-20TQ035THN3 matches the original forward voltage specification (570 mV @ 20 A) and includes capacitance data. The VS-20TQ035-M3 is available in tube packaging. Selection depends on packaging requirements and whether forward voltage measurement at the specific 20 A current level is critical to the application.

Q: Why is the 20TQ035 base product not recommended?

A: The 20TQ035 is classified as obsolete and does not meet ROHS3 compliance requirements. Current design standards and regulatory requirements favor active, compliant products. The VS-20TQ035-M3 and VS-20TQ035THN3 provide equivalent electrical performance with active status and full compliance.

Q: Are all substitute parts available in the same TO-220-2 package?

A: Yes. All substitute parts listed use the TO-220-2 package configuration with through-hole mounting, ensuring mechanical and thermal compatibility with existing PCB designs and heat sink arrangements.

Q: What compliance certifications apply to the substitute parts?

A: Both VS-20TQ035-M3 and VS-20TQ035THN3 carry ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory requirements of the original VS-20TQ035PBF.