LCE7.0 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The Littelfuse LCE7.0 is a unidirectional Zener transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. Featuring a 7V reverse standoff voltage and 12.6V maximum clamping voltage at 100A peak pulse current, this component provides 1500W peak pulse power dissipation in a through-hole DO-201 package. The LCE7.0 is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	7V	V
Voltage - Breakdown (Min)	7.37V	V
Voltage - Clamping (Max) @ Ipp	12.6V	V
Current - Peak Pulse (10/1000µs)	100A	A
Power - Peak Pulse	1500W	W
Operating Temperature Range	-55°C to 175°C	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	DO-201AA, DO-27, Axial	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LCE7.0 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - Reverse Standoff (Typ): 7V ± tolerance
Voltage - Clamping (Max) @ Ipp: 12.1V to 12.6V range
Current - Peak Pulse (10/1000µs): minimum 52A (acceptable reduction from 100A in specific applications)
Power - Peak Pulse: 1500W or 600W (depending on application requirements)
Operating Temperature: -55°C to 175°C minimum

Mechanical Compatibility Criteria:

Mounting Type: Through Hole
Package / Case: DO-201AA, DO-27, DO-204AC (DO-15), or DO-13 axial packages
Unidirectional Channels: 1

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into three categories based on these parameters: direct electrical equivalents with identical or superior electrical ratings, manufacturer-recommended alternatives with comparable performance characteristics, and functionally compatible options with acceptable parameter variations for general-purpose applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Product Status	Operating Temperature
LCE7.0	Littelfuse Inc.	7V	12.6V	100A	1500W	DO-201AA, DO-27	Obsolete	-55°C to 175°C
LCE7.0A	Littelfuse Inc.	7V	12V	100A	1500W	DO-201AA, DO-27	Active	-55°C to 175°C
P6KE8.2A	Taiwan Semiconductor Corporation	7.02V	12.1V	52A	600W	DO-204AC (DO-15)	Active	-55°C to 175°C
1.5KE8.2A-E3/73	Vishay General Semiconductor - Diodes Division	7.02V	12.1V	124A	1500W	DO-201AA, DO-27	Active	-55°C to 175°C
1.5KE8.2A-HF	Comchip Technology	7V	12.1V	123.97A	1500W	DO-201AA, DO-27	Active	-55°C to 150°C
1.5KE8.2A-TP	Micro Commercial Co	7.02V	12.1V	—	1500W	DO-201AE	Active	-55°C to 175°C
1.5KE8.2AHE3_A/C	Vishay General Semiconductor - Diodes Division	7.02V	12.1V	124A	1500W	DO-201AA, DO-27	Active	-55°C to 175°C
1N5631A	Solid State Inc.	7.02V	12.1V	124A	1500W	DO-13	Active	-65°C to 175°C
1N6269A-E3/54	Vishay General Semiconductor - Diodes Division	7.02V	12.1V	124A	1500W	DO-201AA, DO-27	Active	-55°C to 175°C
1N6269A-E3/73	Vishay General Semiconductor - Diodes Division	7.02V	12.1V	124A	1500W	DO-201AA, DO-27	Active	-55°C to 175°C

Engineering Selection Recommendations

Primary Recommendation: LCE7.0A

The Littelfuse LCE7.0A is the direct active equivalent of the obsolete LCE7.0. Both components share identical reverse standoff voltage (7V), equivalent clamping voltage (12V vs. 12.6V), matching peak pulse current (100A), and identical power dissipation (1500W). The LCE7.0A maintains the same DO-201AA/DO-27 package footprint, operating temperature range (-55°C to 175°C), and RoHS3 compliance. This part provides seamless mechanical and electrical substitution with 1366 units in stock.

Secondary Recommendations for High-Current Applications: 1.5KE8.2A-E3/73, 1.5KE8.2AHE3_A/C, 1N6269A-E3/54, 1N6269A-E3/73

These Vishay TransZorb® and 1N6269A variants offer superior peak pulse current capability (124A vs. 100A) while maintaining equivalent clamping voltage (12.1V) and full 1500W power dissipation. All are available in DO-201AA/DO-27 packages with -55°C to 175°C operating range and RoHS3 compliance. The 1.5KE8.2AHE3_A/C variant includes AEC-Q101 automotive qualification. These options are suitable for applications requiring enhanced transient suppression margin.

Alternative for Reduced Power Applications: P6KE8.2A

The Taiwan Semiconductor Corporation P6KE8.2A provides equivalent voltage characteristics (7.02V standoff, 12.1V clamping) but with reduced peak pulse current (52A) and power dissipation (600W). This part is packaged in DO-204AC (DO-15), requiring PCB layout modification. Selection is appropriate only for applications where 52A peak pulse current is sufficient.

Extended Temperature Option: 1N5631A

The Solid State Inc. 1N5631A offers extended lower operating temperature (-65°C vs. -55°C) with equivalent electrical performance (7.02V standoff, 12.1V clamping, 124A peak pulse, 1500W power). The DO-13 package requires mechanical redesign. This option is suitable for applications requiring sub-55°C operation.

Reduced Temperature Option: 1.5KE8.2A-HF

The Comchip Technology 1.5KE8.2A-HF provides equivalent electrical performance with maximum operating temperature of 150°C (vs. 175°C). Selection is appropriate only for applications with maximum junction temperature below 150°C.

Frequently Asked Questions (FAQ)

Q: Can LCE7.0A directly replace LCE7.0 without PCB modification?

A: Yes. The LCE7.0A is mechanically and electrically compatible with identical DO-201AA/DO-27 package footprint, pin configuration, and electrical characteristics within acceptable tolerance ranges.

Q: What is the difference between 12.6V (LCE7.0) and 12.1V (substitute parts) clamping voltage?

A: The 0.5V difference falls within normal manufacturing tolerance for TVS diodes and does not affect circuit protection performance. Both values provide equivalent overvoltage suppression for 7V nominal circuits.

Q: Are the 1.5KE8.2A variants interchangeable with LCE7.0?

A: Yes, for applications where 124A peak pulse current is acceptable. The 1.5KE8.2A series provides superior transient suppression capability (24A higher peak current) while maintaining equivalent clamping voltage and power dissipation. Mechanical compatibility depends on package selection (DO-201AA/DO-27 variants are pin-compatible).

Q: Why does P6KE8.2A have lower peak pulse current (52A)?

A: The P6KE8.2A is rated for 600W peak pulse power versus 1500W for LCE7.0. This results in proportionally lower peak pulse current capability. Selection requires verification that 52A peak pulse current is sufficient for the application.

Q: What is the significance of the 1.5KE8.2AHE3_A/C AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the component meets automotive-grade reliability standards. This variant is suitable for automotive and high-reliability applications requiring formal qualification documentation.

Q: Can I use 1N5631A in a DO-201 footprint?

A: No. The 1N5631A uses DO-13 package, which has different pin spacing and mechanical dimensions than DO-201. PCB redesign is required for this substitution.

Q: What is the difference between 1.5KE8.2A-E3/73 and 1N6269A-E3/73?

A: Both are Vishay TransZorb® diodes with identical electrical specifications (7.02V standoff, 12.1V clamping, 124A peak pulse, 1500W power). The 1N6269A designation represents an alternative part number for the same component. Both are interchangeable.

Q: Is 1.5KE8.2A-TP suitable for all applications?

A: The 1.5KE8.2A-TP is electrically compatible but uses DO-201AE package variant. Verify PCB footprint compatibility before selection. Peak pulse current specification is not provided for this variant.

Q: What is the minimum peak pulse current acceptable for LCE7.0 substitution?

A: The LCE7.0 is rated for 100A peak pulse current. Substitutes with lower ratings (such as P6KE8.2A at 52A) require application-specific verification that reduced current capability does not compromise circuit protection.

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