LCE28A Equivalent & Substitute Parts

Part Overview

The LCE28A is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates across a temperature range of -55°C to 175°C and is RoHS3 compliant. The part is currently active in production with 2040 units in stock.

Substitute parts become necessary when the LCE28A reaches end-of-life status, when alternative packaging or performance characteristics better suit specific application requirements, or when supply constraints require component alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

LCE28A

Littelfuse Inc.In Stock: 2122LCE28A Datasheet

Current PartRFQ

5KP28A

Littelfuse Inc.In Stock: 149105KP28A Datasheet

MFR RecommendedRFQ

SA28A

Fairchild SemiconductorIn Stock: 6156SA28A Datasheet

MFR RecommendedRFQ

3KP28A-TP

Micro Commercial CoIn Stock: 19123KP28A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LCE28A is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 28V
• Voltage - Breakdown (Min): 31.1V
• Voltage - Clamping (Max) @ Ipp: 45.4V to 45.5V
• Unidirectional Channels: 1
• Operating Temperature Range: -55°C ~ 175°C
• Mounting Type: Through Hole
• RoHS3 Compliance: Required

All substitute parts listed maintain the core 28V standoff voltage specification and operate within the same temperature range. Variations in peak pulse current and power dissipation capacity are acceptable provided the application requirements do not exceed the substitute part's ratings. Package differences (DO-201AA, P600, DO-204AC, R-6) reflect different form factors suitable for distinct PCB layouts and thermal management strategies.

Parameter Comparison

Engineering Selection Recommendations

5KP28A (Littelfuse Inc.) is the primary substitute for applications requiring higher peak pulse current and power dissipation capacity. This part maintains active production status and full RoHS3 compliance. The P600 package accommodates higher thermal stress through increased surface area. Selection is appropriate when the application experiences transient events exceeding 33A peak pulse current or when thermal management benefits from the larger package footprint.

3KP28A-TP (Micro Commercial Co) serves as an alternative for applications with moderate power dissipation requirements (3000W). This part remains in active production with RoHS3 compliance and offers the R-6 package configuration. Selection is suitable when the application power budget falls between the LCE28A and 5KP28A specifications.

SA28A (Fairchild Semiconductor) is not recommended for new designs. Although RoHS3 compliant, this part carries obsolete status and features reduced peak pulse current (11.2A) and power dissipation (500W) compared to the LCE28A. Selection is limited to legacy system maintenance where component compatibility with existing designs is mandatory and supply availability is confirmed.

Frequently Asked Questions (FAQ)

Q: Can the 5KP28A directly replace the LCE28A in existing PCB layouts?

A: Direct PCB replacement requires verification of package footprint compatibility. The LCE28A uses DO-201AA packaging while the 5KP28A uses P600 packaging. Both are axial through-hole components, but physical dimensions differ. PCB layout modification may be necessary.

Q: What is the primary difference between these substitute parts?

A: The substitute parts differ in peak pulse current handling and power dissipation capacity. The 5KP28A handles 112.3A at 5000W, the LCE28A handles 33A at 1500W, and the 3KP28A-TP handles 3000W. All maintain identical 28V standoff voltage and clamping characteristics.

Q: Is the SA28A suitable for new product development?

A: No. The SA28A carries obsolete product status and offers lower performance specifications (11.2A, 500W) than the LCE28A. Use only when supporting legacy systems where component compatibility is required and alternative solutions are not feasible.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All listed substitute parts are RoHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. Moisture sensitivity level is 1 (Unlimited) for all active parts.

Q: How do I determine which substitute is appropriate for my application?

A: Compare your application's peak transient current and power dissipation requirements against the specifications provided in the Parameter Comparison table. Select the substitute part with ratings that meet or exceed your application demands while maintaining the 28V standoff voltage specification.