Equivalent & Substitute Parts for Vicor 19180-510

Part Overview

The Vicor 19180-510 is a unidirectional TVS Zener diode rated for 1500W peak pulse power at 51V, housed in an SMC package. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability. The substitute part identified maintains functional equivalence through matching electrical performance parameters and package compatibility.

Substiute Parts

19180-510

Vicor CorporationIn Stock: 117319180-510 Datasheet

Current PartRFQ

SZ1.5SMC51AT3G

LittelfuseIn Stock: 6427SZ1.5SMC51AT3G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse SZ1.5SMC51AT3G qualifies as a direct functional substitute based on the following alignment of critical parameters:

Matching Criteria:

• Package Type: Both components use SMC (DO-214AB) surface mount package, ensuring mechanical and thermal compatibility
• Power Rating: Both rated for 1500W peak pulse power, maintaining transient suppression capability
• Voltage Class: The substitute's 43.6V reverse standoff voltage with 48.5V minimum breakdown aligns with the 51V rating class, providing equivalent protection in the same voltage range
• Unidirectional Configuration: Both are single-channel unidirectional TVS diodes
• Compliance: Both are ROHS3 compliant and REACH unaffected, meeting regulatory requirements

The substitute part transitions from an obsolete component to an active, production-qualified device with established supply availability.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse SZ1.5SMC51AT3G is the qualified substitute for the obsolete Vicor 19180-510. Selection is based on:

• Functional Equivalence: Identical SMC package, 1500W power rating, and unidirectional TVS configuration ensure drop-in compatibility
• Active Production Status: The substitute is in active production with established supply chain availability, eliminating obsolescence risk
• Regulatory Compliance: Both components meet ROHS3 and REACH requirements, maintaining compliance posture in regulated applications
• Automotive Qualification: The substitute carries AEC-Q101 qualification, providing additional assurance for automotive and mission-critical applications
• Electrical Performance: The specified clamping voltage of 70.1V and peak pulse current of 21.4A confirm adequate transient suppression capability for the 51V voltage class

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse SZ1.5SMC51AT3G be used as a direct replacement for the Vicor 19180-510?

A: Yes. Both components share identical SMC package geometry, 1500W power rating, and unidirectional TVS configuration. The electrical parameters of the substitute align with the voltage class of the original part, enabling direct substitution in PCB designs without layout modifications.

Q: What is the primary reason for substitution?

A: The Vicor 19180-510 is classified as obsolete. The Littelfuse substitute is in active production, ensuring long-term supply availability and design continuity.

Q: Are there any compliance differences between the two parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The substitute additionally carries AEC-Q101 automotive qualification, which may provide additional assurance in automotive applications but does not create incompatibility with the original specification.

Q: What are the key electrical parameters that determine substitution validity?

A: The critical parameters are power rating (1500W), package type (SMC), voltage class (51V range), and unidirectional configuration (1 channel). The substitute meets all these requirements.

Q: Is the SMC package identical between both parts?

A: Yes. Both components use the DO-214AB SMC package, ensuring mechanical, thermal, and electrical compatibility without PCB redesign.

Q: What is the operating temperature range of the substitute?

A: The Littelfuse SZ1.5SMC51AT3G operates from -65°C to 150°C junction temperature, providing wide thermal operating margin for industrial and automotive applications.