LCE8.5-E3/54 Equivalent & Substitute Parts

Part Overview

The LCE8.5-E3/54 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 design support and procurement.

Substiute Parts

LCE8.5-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 913LCE8.5-E3/54 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-E3/54 is determined by the following critical parameters:

• Unidirectional Configuration: All substitutes must maintain single-channel unidirectional operation
• Voltage Rating Class: Reverse standoff voltage must be within the 8.5V nominal range (8.5V ± tolerance)
• Breakdown Voltage: Minimum breakdown voltage must fall within acceptable range (9.44V ~ 9.5V)
• Clamping Voltage: Maximum clamping voltage at peak pulse current must be compatible (14.5V ~ 15.9V)
• Peak Pulse Power: Minimum 1500W rating required for equivalent functionality
• Mounting Type: Through-hole axial configuration required
• Package Compatibility: DO-201AA or DO-15 (DO-204AC) packages acceptable
• Temperature Range: Operating temperature must support -55°C minimum or better
• Compliance: ROHS3 compliance required

The identified substitutes meet these criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

1.5KE10A (Taiwan Semiconductor Corporation)

The 1.5KE10A is the primary recommended substitute. It maintains identical peak pulse power rating (1500W), equivalent reverse standoff voltage (8.55V vs. 8.5V), and superior peak pulse current capability (108A vs. 94A). The part is in active production status with ROHS3 compliance. Operating temperature range (-55°C ~ 175°C) is slightly narrower at the lower bound but remains suitable for most general-purpose applications. Package compatibility is direct (DO-201AA, DO-27). Inventory availability is high (4300 pcs).

P6KE10A (Fairchild Semiconductor)

The P6KE10A is a secondary substitute option. While it maintains voltage rating compatibility (8.5V reverse standoff, 9.5V breakdown, 14.5V clamping), the peak pulse power rating is reduced to 600W, representing a 60% reduction from the original specification. This part is suitable only for applications where peak pulse power requirements do not exceed 600W. The package is DO-15 (DO-204AC), which differs from the original DO-201AA configuration and may require PCB layout modification. Peak pulse current is significantly lower at 43A. This substitute is appropriate only when power dissipation requirements are confirmed to be within 600W limits.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE10A directly replace the LCE8.5-E3/54 without circuit modification?

A: Yes. The 1.5KE10A maintains compatible voltage ratings, identical power rating, and equivalent package configuration (DO-201AA, DO-27 axial through-hole). No circuit modification is required.

Q: What is the key difference between the 1.5KE10A and P6KE10A substitutes?

A: The primary difference is peak pulse power rating. The 1.5KE10A maintains the original 1500W specification, while the P6KE10A is rated at 600W. Additionally, the P6KE10A uses a DO-15 package instead of DO-201AA, potentially requiring PCB layout changes.

Q: Is the P6KE10A suitable for all applications using the LCE8.5-E3/54?

A: No. The P6KE10A is suitable only for applications where peak pulse power dissipation does not exceed 600W. Applications requiring the full 1500W capability must use the 1.5KE10A.

Q: What is the operating temperature difference between substitutes?

A: The LCE8.5-E3/54 operates from -65°C to 175°C. The 1.5KE10A operates from -55°C to 175°C (10°C narrower at lower bound). The P6KE10A operates from -50°C to 175°C (15°C narrower at lower bound). For applications requiring operation below -55°C, the original part or equivalent with extended low-temperature range is necessary.

Q: Are both substitutes ROHS3 compliant?

A: The 1.5KE10A is confirmed ROHS3 compliant. The P6KE10A compliance status is not specified in available documentation.

Q: Can I use the P6KE10A in a DO-201AA footprint?

A: No. The P6KE10A uses DO-15 (DO-204AC) package, which has different lead spacing and configuration than DO-201AA. PCB layout modification is required.