LCE6.5 Equivalent & Substitute Parts

Part Overview

The LCE6.5 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 6.5V reverse standoff voltage with an 11.76V maximum clamping voltage at peak pulse current, housed in a DO-201 through-hole package. The LCE6.5 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical characteristics while offering active product status and improved availability.

Key Parameters

Parameter	LCE6.5
Voltage - Reverse Standoff (Typ)	6.5V
Voltage - Clamping (Max) @ Ipp	11.76V
Current - Peak Pulse (10/1000µs)	100A
Power - Peak Pulse	1500W (1.5kW)
Operating Temperature Range	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-201AA, DO-27, Axial
Type	Zener
Unidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LCE6.5 are grouped based on electrical compatibility and package form factor. The primary substitution criteria are:

Voltage - Reverse Standoff: 6.5V (exact match required)
Voltage - Breakdown (Min): 7.22V or higher (acceptable range)
Voltage - Clamping (Max) @ Ipp: 11.2V to 12.3V (acceptable range for general-purpose protection)
Current - Peak Pulse: 100A minimum (higher values acceptable for enhanced protection)
Power - Peak Pulse: 1500W minimum (higher values acceptable)
Operating Temperature: -55°C minimum to 175°C maximum (acceptable range)
Mounting Type: Through Hole (required)
Type: Zener (required)
Unidirectional Channels: 1 (required)

Substitutes are divided into two categories: direct package replacements (DO-201 form factor) and higher-power alternatives (R-6 and P600 packages). Direct replacements maintain identical footprints for PCB compatibility. Higher-power alternatives provide enhanced surge protection capability with different package geometries.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status
LCE6.5	Littelfuse Inc.	6.5V	11.76V	100A	1500W	-55°C ~ 175°C	DO-201AA	Obsolete
LCE6.5A	Littelfuse Inc.	6.5V	11.2V	100A	1500W	-55°C ~ 175°C	DO-201AA	Active
LCE6.5A-TP	Micro Commercial Co	6.5V	11.2V	100A	1500W	-55°C ~ 175°C	DO-201AE	Active
P5KE6.5A-TP	Micro Commercial Co	6.5V	11.2V	44.7A	500W	-65°C ~ 175°C	DO-15	Active
P5KE6.5A-AP	Micro Commercial Co	6.5V	11.2V	44.7A	500W	-65°C ~ 175°C	DO-15	Active
P5KE6.5A-BP	Micro Commercial Co	6.5V	11.2V	44.7A	500W	-65°C ~ 175°C	DO-15	Active
SA6.5A-AP	Micro Commercial Co	6.5V	11.2V	45.5A	500W	-55°C ~ 175°C	DO-15	Active
3KP6.5A-TP	Micro Commercial Co	6.5V	11.2V	267.9A	3000W	-55°C ~ 175°C	R-6	Active
5KP6.5A-G	Comchip Technology	6.5V	11.2V	446.43A	5000W	-55°C ~ 150°C	R-6	Active
5KP6.5A-TP	Micro Commercial Co	6.5V	11.2V	447A	5000W	-55°C ~ 175°C	R-6	Active
5KP6.5E3/TR13	Microchip Technology	6.5V	12.3V	407A	5000W	-55°C ~ 175°C	P600	Active

Engineering Selection Recommendations

Direct package replacements (LCE6.5A and LCE6.5A-TP) are recommended for applications requiring identical PCB footprints and mounting compatibility with the obsolete LCE6.5. Both parts maintain the DO-201 form factor, 100A peak pulse current, and 1500W power dissipation. LCE6.5A is manufactured by Littelfuse Inc. with active product status and ROHS3 compliance. LCE6.5A-TP is manufactured by Micro Commercial Co with identical electrical specifications and active status.

For applications where package geometry can be modified, the P5KE6.5A series (P5KE6.5A-TP, P5KE6.5A-AP, P5KE6.5A-BP) offers DO-15 package compatibility with reduced peak pulse current (44.7A) and power dissipation (500W). These parts are suitable for lower-energy transient protection requirements. SA6.5A-AP provides similar electrical characteristics with marginally higher peak pulse current (45.5A).

Higher-power alternatives (3KP6.5A-TP, 5KP6.5A-G, 5KP6.5A-TP, 5KP6.5E3/TR13) are available for applications requiring enhanced surge protection. These parts feature R-6 or P600 packages with peak pulse currents ranging from 267.9A to 447A and power dissipation from 3000W to 5000W. All substitute parts maintain the 6.5V reverse standoff voltage and comply with ROHS3 and REACH requirements where applicable.

Frequently Asked Questions (FAQ)

Q: Can LCE6.5A directly replace LCE6.5 without PCB modifications?

A: Yes. LCE6.5A maintains the DO-201AA package form factor and axial lead configuration, enabling direct PCB footprint compatibility. Both parts share identical reverse standoff voltage (6.5V), peak pulse current (100A), and power dissipation (1500W).

Q: What is the difference between LCE6.5A and LCE6.5A-TP?

A: Both parts are electrically equivalent with 6.5V reverse standoff voltage, 11.2V clamping voltage, and 100A peak pulse current. LCE6.5A is manufactured by Littelfuse Inc. in DO-201AA package. LCE6.5A-TP is manufactured by Micro Commercial Co in DO-201AE package. The package designations (AA vs. AE) represent minor dimensional variations within the DO-201 standard, maintaining functional compatibility.

Q: When should P5KE6.5A series parts be used instead of direct replacements?

A: P5KE6.5A series parts (P5KE6.5A-TP, P5KE6.5A-AP, P5KE6.5A-BP) are suitable for applications where lower peak pulse current (44.7A) and reduced power dissipation (500W) are acceptable. These parts use the DO-15 package, which differs from the DO-201 form factor. PCB layout modifications are required for implementation.

Q: What are the advantages of higher-power alternatives like 5KP6.5A-TP?

A: Higher-power alternatives provide enhanced transient protection with peak pulse currents up to 447A and power dissipation up to 5000W, compared to 100A and 1500W for the LCE6.5. These parts are suitable for applications experiencing higher-energy surge events. The R-6 and P600 packages require different PCB footprints than the original DO-201 package.

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for LCE6.5A, 5KP6.5A-G, and 5KP6.5E3/TR13. Compliance status for other substitute parts is not specified in the provided data. Verify ROHS3 compliance with the component supplier for specific part selections.

Q: What is the operating temperature range difference between substitutes?

A: Most substitute parts operate from -55°C to 175°C, matching the LCE6.5 specification. P5KE6.5A series parts extend the lower temperature limit to -65°C. 5KP6.5A-G operates to a maximum of 150°C, which is 25°C lower than the LCE6.5 specification. Verify temperature requirements for your application before selection.

Q: Can substitute parts with different peak pulse currents be used interchangeably?

A: Substitution is acceptable only when the substitute part's peak pulse current meets or exceeds the application requirement. Parts with lower peak pulse current (44.7A for P5KE6.5A series) cannot replace parts specified for 100A operation. Parts with higher peak pulse current provide enhanced protection and are acceptable for applications designed for lower current ratings.

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