VS-45LR20 Equivalent & Substitute Parts

Part Overview

The VS-45LR20 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This component is rated for 200 V DC reverse voltage with 150 A average rectified current in a stud mount DO-205AC (DO-30) package. The device operates across a junction temperature range of -40°C to 200°C and features standard recovery characteristics with reverse polarity technology.

The VS-45LR20 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this rectifier specification.

Substiute Parts

VS-45LR20

Vishay General Semiconductor - Diodes DivisionIn Stock: 1078VS-45LR20 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-45LR20 is determined by the following critical parameters:

Current Rating Match: The substitute part must maintain the 150 A average rectified current specification to ensure equivalent current-handling capability in the application circuit.

Mounting Configuration: The substitute part must support stud mount configuration to ensure mechanical compatibility with existing chassis and thermal management infrastructure.

Reverse Voltage Capability: The substitute part may exceed the 200 V DC reverse voltage rating of the original part. Higher voltage ratings provide design margin and are electrically compatible in applications rated for 200 V operation.

Package Family Compatibility: The substitute part must belong to the DO-205 package family (DO-205AA or DO-205AC) to ensure dimensional and thermal interface compatibility.

Compliance and Status: The substitute part must maintain ROHS3 compliance and active product status to ensure long-term availability and regulatory alignment.

The VS-150UR60D meets all substitution criteria through equivalent current rating, compatible stud mount configuration, higher reverse voltage rating (600 V), and active product status with current inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The VS-150UR60D is the qualified substitute for the obsolete VS-45LR20 based on the following engineering criteria:

Current Rating Equivalence: Both parts are rated for 150 A average rectified current, ensuring identical current-handling performance in the application circuit.

Voltage Margin: The VS-150UR60D provides 600 V reverse voltage rating compared to the 200 V rating of the original part. This higher rating is fully compatible with applications designed for 200 V operation and provides additional design margin for transient voltage protection.

Mounting Compatibility: Both parts feature stud mount configuration, ensuring mechanical and thermal interface compatibility with existing chassis designs.

Active Product Status: The VS-150UR60D is classified as active with 853 units in current inventory, providing reliable long-term supply availability compared to the obsolete status of the VS-45LR20.

Regulatory Compliance: Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring equivalent environmental and regulatory alignment.

Recovery Characteristics: The VS-150UR60D features fast recovery characteristics (≤500ns) compared to the standard recovery (>500ns) of the original part. Fast recovery operation is electrically compatible and provides improved switching performance in rectification applications.

Frequently Asked Questions (FAQ)

Q: Can the VS-150UR60D directly replace the VS-45LR20 in existing designs?

A: Yes. The VS-150UR60D maintains the same 150 A current rating and stud mount configuration. The higher 600 V reverse voltage rating is compatible with applications designed for 200 V operation. Both parts are ROHS3 compliant with identical moisture sensitivity levels.

Q: What is the significance of the higher voltage rating on the VS-150UR60D?

A: The 600 V rating on the VS-150UR60D exceeds the 200 V requirement of the original application. Higher voltage-rated diodes are electrically compatible in lower-voltage applications and provide additional protection against transient overvoltage conditions without affecting normal circuit operation.

Q: Are there package differences between the VS-45LR20 and VS-150UR60D?

A: Both parts use stud mount configuration within the DO-205 package family. The VS-45LR20 uses DO-205AC (DO-30) while the VS-150UR60D uses DO-205AA (DO-8). Both packages are mechanically compatible for stud mount applications with equivalent thermal interface characteristics.

Q: What is the difference between standard recovery and fast recovery specifications?

A: The VS-45LR20 features standard recovery (>500ns) while the VS-150UR60D features fast recovery (≤500ns). Fast recovery operation reduces reverse recovery time, improving switching performance. This characteristic is compatible with standard recovery applications and does not introduce incompatibility.

Q: Why is the VS-45LR20 classified as obsolete?

A: The VS-45LR20 is no longer in active production. The VS-150UR60D is the active equivalent part maintained by Vishay General Semiconductor - Diodes Division for ongoing supply and support.

Q: Are thermal characteristics equivalent between these parts?

A: Both parts operate across -40°C to 180°C junction temperature range (VS-150UR60D) and -40°C to 200°C (VS-45LR20). The VS-150UR60D provides equivalent thermal performance for applications within the overlapping temperature range. Stud mount configuration ensures equivalent thermal interface characteristics.

Q: What inventory status should be considered for procurement?

A: The VS-45LR20 has 994 units in stock but is obsolete. The VS-150UR60D has 853 units in current inventory and active product status, ensuring long-term availability and supply continuity for new designs and production requirements.