LCE11 Equivalent & Substitute Parts

Part Overview

The LCE11 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. Featuring an 11V reverse standoff voltage and 82A peak pulse current rating in a through-hole DO-201 package, the LCE11 provides 1500W peak pulse power dissipation across an operating temperature range of -55°C to 175°C.

The LCE11 is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and new design requirements where this part is specified or currently deployed.

Substiute Parts

LCE11

Littelfuse Inc.In Stock: 971LCE11 Datasheet

Current PartRFQ

LCE11A

Littelfuse Inc.In Stock: 830LCE11A Datasheet

DirectRFQ

5KP11E3/TR13

Microchip TechnologyIn Stock: 6405KP11E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LCE11 are qualified based on the following critical parameters:

• Voltage - Reverse Standoff (Typ): 11V
• Unidirectional Zener type configuration
• Through-hole axial mounting
• Operating temperature range: -55°C to 175°C
• RoHS3 compliance

The LCE11A represents a direct manufacturer alternative from Littelfuse Inc. within the same LCE series, maintaining identical standoff voltage, peak pulse current, and thermal specifications while offering improved clamping voltage performance and active product status.

The 5KP11E3/TR13 from Microchip Technology is a manufacturer-recommended substitute that maintains the 11V standoff voltage specification and through-hole axial package format. This part offers enhanced peak pulse current (249A) and power dissipation (5000W) capabilities, providing superior transient protection margin in the same physical package footprint.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct form-fit-function replacement of the obsolete LCE11, the LCE11A is the primary selection. Both parts maintain identical electrical performance specifications (82A peak pulse current, 1500W power dissipation) and thermal operating range, with LCE11A offering active product status and improved clamping voltage characteristics (18.2V versus 19.11V).

The 5KP11E3/TR13 is suitable for applications where enhanced transient protection margin is acceptable or required. This part provides 3× the peak pulse current capability (249A) and 3.33× the power dissipation (5000W) while maintaining the same 11V standoff voltage and through-hole axial package format. All three parts meet ROHS3 compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the LCE11A be used as a direct replacement for the LCE11?

A: Yes. Both parts share identical reverse standoff voltage (11V), peak pulse current (82A), power dissipation (1500W), and operating temperature range (-55°C to 175°C). The LCE11A offers active product status and improved clamping voltage performance.

Q: What is the primary difference between the LCE11A and 5KP11E3/TR13?

A: The 5KP11E3/TR13 provides significantly higher transient current handling (249A versus 82A) and power dissipation (5000W versus 1500W) while maintaining the same 11V standoff voltage. Both are through-hole axial packages suitable for PCB mounting.

Q: Are all substitute parts RoHS compliant?

A: Yes. The LCE11, LCE11A, and 5KP11E3/TR13 are all ROHS3 compliant.

Q: Does package size differ between these parts?

A: The LCE11 and LCE11A use DO-201AA/DO-27 axial packages. The 5KP11E3/TR13 uses a P600 axial package. Both package types are through-hole axial format suitable for standard PCB mounting, though physical dimensions may vary.

Q: Which substitute should be selected for new designs?

A: Selection depends on transient protection requirements. For equivalent performance, use LCE11A. For enhanced protection margin, use 5KP11E3/TR13. Both are active products with established supply availability.