LCE8.5-E3/73 Equivalent & Substitute Parts

Part Overview

The LCE8.5-E3/73 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This component is designed for general-purpose transient voltage protection applications with a reverse standoff voltage of 8.5V and peak pulse power rating of 1500W. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar protection characteristics.

Substiute Parts

LCE8.5-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 843LCE8.5-E3/73 Datasheet

Current PartRFQ

1.5KE10A

Taiwan Semiconductor CorporationIn Stock: 43181.5KE10A Datasheet

MFR RecommendedRFQ

P6KE10A

Fairchild SemiconductorIn Stock: 5025P6KE10A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LCE8.5-E3/73 is determined by the following critical electrical and mechanical parameters:

• Unidirectional Zener TVS diode topology
• Reverse standoff voltage range: 8.5V nominal
• Breakdown voltage minimum: 9.44V to 9.5V
• Clamping voltage maximum: 14.5V to 15.9V at peak pulse current
• Peak pulse power rating: 1500W (1.5kW)
• Through-hole axial mounting configuration
• Operating temperature range compatibility: -55°C to 175°C minimum

The substitute parts identified maintain electrical equivalence within these parameters while offering active product status and improved availability. Package variations (DO-201AA versus DO-15) represent acceptable mechanical substitutes for through-hole applications with compatible footprints.

Parameter Comparison

Engineering Selection Recommendations

1.5KE10A (Taiwan Semiconductor Corporation) is the primary substitute for the LCE8.5-E3/73. This part maintains full electrical equivalence with identical 1500W peak pulse power rating, matching reverse standoff voltage (8.55V nominal), and compatible clamping voltage (14.5V). The 1.5KE10A offers active product status with superior availability and ROHS3 compliance. The higher peak pulse current (108A versus 94A) provides additional transient protection margin. Package compatibility is direct in DO-201AA configuration.

P6KE10A (Fairchild Semiconductor) serves as a secondary substitute for applications where peak pulse power requirements do not exceed 600W. This part maintains voltage parameter compatibility but is limited to 43A peak pulse current and 600W power dissipation. The P6KE10A is suitable only for lower-energy transient protection scenarios. Package configuration differs (DO-15/DO-204AC), requiring PCB layout verification for mechanical compatibility.

Selection between these substitutes depends on application transient energy levels and available PCB footprint space. The 1.5KE10A is recommended as the primary choice for direct replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE10A directly replace the LCE8.5-E3/73 in existing designs?

A: Yes. The 1.5KE10A maintains electrical equivalence across all critical parameters: reverse standoff voltage (8.55V nominal), breakdown voltage (9.5V minimum), clamping voltage (14.5V maximum), and peak pulse power (1500W). Through-hole axial mounting and DO-201AA package compatibility enable direct PCB substitution without design modification.

Q: What are the limitations of using P6KE10A as a substitute?

A: The P6KE10A is limited to 600W peak pulse power and 43A peak pulse current, compared to the original 1500W and 94A specifications. This part is suitable only for applications with lower transient energy requirements. Additionally, the DO-15 package differs from the original DO-201AA, requiring PCB footprint verification before implementation.

Q: Are there temperature range considerations when substituting?

A: The 1.5KE10A operates from -55°C to 175°C, which covers the upper temperature range of the original part (-65°C to 175°C). For applications requiring operation below -55°C, the original LCE8.5-E3/73 specifications must be verified against system requirements. The P6KE10A operates from -50°C to 175°C, further limiting low-temperature performance.

Q: Do substitute parts meet the same compliance standards?

A: The 1.5KE10A is ROHS3 compliant, matching the original part's certification status. Both parts carry EAR99 ECCN classification and REACH Unaffected status. RoHS compliance information for the P6KE10A is not specified in available documentation.

Q: What is the difference between DO-201AA and DO-15 packages?

A: Both are through-hole axial packages for TVS diodes. DO-201AA (also designated DO-27) is the original package for the LCE8.5-E3/73 and 1.5KE10A. DO-15 (DO-204AC) is a smaller axial package used by the P6KE10A. PCB hole spacing and lead diameter differ between these packages, requiring layout verification before substitution.