VT80L45PW-M3/4W Equivalent & Substitute Parts

Part Overview

The VT80L45PW-M3/4W is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode arrangement with 45V reverse voltage rating and 40A average rectified current per diode. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement continuity.

Substiute Parts

VT80L45PW-M3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 794VT80L45PW-M3/4W Datasheet

Current PartRFQ

DSSK80-0045B

IXYSIn Stock: 1440DSSK80-0045B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VT80L45PW-M3/4W is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Diode Configuration: 1 Pair Common Cathode (mandatory)
• Technology: Schottky (mandatory)
• Voltage - DC Reverse (Vr) (Max): 45 V (mandatory)
• Current - Average Rectified (Io) (per Diode): 40 A (mandatory)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory)
• Mounting Type: Through Hole (mandatory)
• RoHS Status: ROHS3 Compliant (mandatory)

Secondary Compatibility Parameters:

• Voltage - Forward (Vf) (Max) @ If: Acceptable within component thermal and circuit design limits
• Current - Reverse Leakage @ Vr: Acceptable within circuit specifications
• Operating Temperature - Junction: Must support application requirements
• Package / Case: May differ if mechanical footprint accommodates board layout

The DSSK80-0045B from IXYS meets all primary substitution criteria while maintaining electrical performance within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

The DSSK80-0045B is an active equivalent substitute for the obsolete VT80L45PW-M3/4W. Both components satisfy identical electrical specifications for diode configuration, reverse voltage rating, average rectified current, switching speed, and regulatory compliance (ROHS3 and REACH).

Key Considerations:

The DSSK80-0045B exhibits superior forward voltage performance (510 mV versus 580 mV at 40A), resulting in reduced power dissipation and improved thermal efficiency. The extended operating temperature range (-55°C to 150°C versus -40°C to 150°C) provides broader environmental compatibility.

The primary design consideration is package transition from TO-3P-3 Full Pack to TO-247-3. This package change requires PCB layout modification and thermal management reassessment. The TO-247-3 package provides equivalent current handling capability with different mechanical mounting and thermal interface characteristics.

The reverse leakage current specification difference (30 mA versus 9 mA at 45V) must be evaluated within specific circuit requirements. For applications with stringent leakage constraints, this parameter requires circuit-level analysis.

Both components maintain full regulatory compliance and are suitable for direct functional substitution with appropriate mechanical and thermal design accommodation.

Frequently Asked Questions (FAQ)

Q: Can the DSSK80-0045B directly replace the VT80L45PW-M3/4W without circuit modification?

A: Electrical substitution is valid. The components share identical diode configuration, reverse voltage rating, and average rectified current specifications. However, package transition from TO-3P-3 to TO-247-3 requires PCB layout modification and thermal interface redesign. Circuit-level validation is necessary for applications sensitive to the forward voltage difference (70 mV) or reverse leakage current increase (21 mA).

Q: What is the significance of the package change from TO-3P-3 to TO-247-3?

A: Both packages are through-hole mounted and rated for 40A operation. The TO-247-3 package offers different mechanical footprint, lead configuration, and thermal dissipation characteristics. PCB layout must be redesigned to accommodate the new package geometry. Thermal management analysis is required to ensure equivalent or improved heat dissipation performance.

Q: How does the forward voltage difference affect circuit performance?

A: The DSSK80-0045B exhibits 70 mV lower forward voltage (510 mV versus 580 mV at 40A). This reduces power dissipation and junction temperature rise, improving overall efficiency. For rectification and switching applications, this represents improved performance. Circuit analysis is necessary only if the original design operated at thermal limits.

Q: Is the increased reverse leakage current (30 mA versus 9 mA) a concern?

A: The reverse leakage specification difference must be evaluated within specific circuit requirements. For precision analog circuits or applications with stringent DC bias specifications, this 21 mA increase requires circuit-level analysis. For standard power rectification and switching applications, this parameter typically remains within acceptable operating margins.

Q: Are both components RoHS and REACH compliant?

A: Yes. Both the VT80L45PW-M3/4W and DSSK80-0045B are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: What is the extended temperature range advantage of the DSSK80-0045B?

A: The DSSK80-0045B operates from -55°C to 150°C, compared to -40°C to 150°C for the VT80L45PW-M3/4W. The extended lower temperature limit provides compatibility with applications requiring operation in cold environments or cryogenic conditions. This represents an operational advantage with no thermal or electrical penalty.