VS-45LR40 Equivalent & Substitute Parts

Part Overview

The VS-45LR40 is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 150 A average rectified current in a DO-205AC (DO-30) stud mount package. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The diode employs standard reverse polarity technology with standard recovery characteristics exceeding 500 ns.

Substiute Parts

VS-45LR40

Vishay General Semiconductor - Diodes DivisionIn Stock: 1140VS-45LR40 Datasheet

Current PartRFQ

VS-150UR60D

Vishay General Semiconductor - Diodes DivisionIn Stock: 949VS-150UR60D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VS-45LR40 is determined by the following critical parameters:

Current Rating Compatibility: The substitute must maintain the 150 A average rectified current specification to ensure equivalent power handling capacity.

Voltage Rating: The substitute must support a minimum DC reverse voltage equal to or exceeding the 400 V requirement of the original part. Higher voltage ratings provide design margin and are acceptable for direct substitution.

Mounting Configuration: The substitute must employ stud mount technology to ensure mechanical and thermal interface compatibility with existing assemblies.

Package Type: The substitute must use compatible stud mount package variants (DO-205 series) to maintain physical fit and thermal characteristics.

Compliance Status: The substitute must maintain RoHS3 compliance and REACH unaffected status to satisfy regulatory requirements.

The VS-150UR60D meets all substitution criteria through equivalent current rating, higher voltage rating, compatible stud mount configuration, and maintained compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The VS-150UR60D is the manufacturer-recommended substitute for the obsolete VS-45LR40. Selection of this substitute is supported by the following engineering factors:

Product Status: The VS-150UR60D maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete VS-45LR40.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements without design modification.

Electrical Performance: The substitute provides equivalent 150 A current handling with improved voltage rating (600 V versus 400 V), delivering enhanced design margin for applications operating at or near the original 400 V specification.

Recovery Characteristics: The VS-150UR60D incorporates fast recovery technology (≤500 ns) compared to the standard recovery (>500 ns) of the original part, reducing switching losses in rectification circuits.

Mechanical Interface: Both components employ stud mount configurations within the DO-205 package family, maintaining compatibility with existing thermal and mechanical mounting structures.

Inventory Status: The VS-150UR60D is available in active inventory (853 pcs), supporting immediate procurement for replacement and new design applications.

Frequently Asked Questions (FAQ)

Q: Can the VS-150UR60D directly replace the VS-45LR40 in existing designs?

A: Yes. The VS-150UR60D provides equivalent 150 A current rating, compatible stud mount configuration, and higher voltage rating (600 V), making it suitable for direct substitution in applications designed for the VS-45LR40.

Q: What is the significance of the higher 600 V rating on the substitute part?

A: The 600 V rating on the VS-150UR60D provides additional voltage margin above the original 400 V specification. This higher rating does not degrade performance in 400 V applications and enhances reliability by reducing stress on the semiconductor junction.

Q: Are there package compatibility concerns between DO-205AC and DO-205AA?

A: Both packages are within the DO-205 stud mount family and maintain compatible mechanical and thermal interfaces. The DO-205AA (DO-8) designation on the substitute reflects the same functional stud mount configuration as the DO-205AC (DO-30) original part.

Q: How does the fast recovery characteristic of the VS-150UR60D affect circuit performance?

A: The fast recovery characteristic (≤500 ns) of the substitute reduces reverse recovery time compared to the standard recovery (>500 ns) of the original part. This improvement decreases switching losses and heat generation in rectification circuits, providing enhanced efficiency.

Q: What compliance certifications apply to the VS-150UR60D?

A: The VS-150UR60D maintains ROHS3 compliance and REACH unaffected status, identical to the original VS-45LR40. No design modifications are required to satisfy regulatory requirements when implementing this substitute.

Q: Is the operating temperature range difference between the parts significant?

A: The VS-150UR60D operates from -40°C to 180°C, compared to -40°C to 200°C for the original part. The 20°C difference at the upper limit does not affect substitution in applications operating within standard industrial temperature ranges (-40°C to 150°C).

Q: What inventory considerations apply to this substitution?

A: The VS-150UR60D is in active production with 853 pcs available in current inventory, compared to the obsolete status of the VS-45LR40 with 1129 pcs remaining stock. The substitute ensures long-term availability for ongoing system support.