LCE14A Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The LCE14A is a unidirectional Zener 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 LCE14A maintains an active product status with 1623 units currently in stock.

Equivalent and substitute parts become necessary when addressing component availability, inventory constraints, or application-specific performance requirements while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

LCE14A

Littelfuse Inc.In Stock: 1645LCE14A Datasheet

Current PartRFQ

5KP14A

Littelfuse Inc.In Stock: 41375KP14A Datasheet

MFR RecommendedRFQ

SA14A

Fairchild SemiconductorIn Stock: 300422SA14A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LCE14A are qualified based on strict electrical parameter alignment within the following criteria:

• Voltage - Reverse Standoff (Typ): 14V
• Voltage - Breakdown (Min): 15.6V
• Voltage - Clamping (Max) @ Ipp: 23.2V
• Unidirectional Zener configuration
• Through-hole mounting technology
• Operating temperature range: -55°C ~ 175°C (TJ)
• RoHS3 compliance

Substitute parts may differ in current-handling capacity (peak pulse current), power dissipation rating, package form factor, and manufacturer identity, provided all voltage parameters and functional characteristics remain within specification.

Parameter Comparison

Engineering Selection Recommendations

5KP14A (Littelfuse Inc.): This substitute maintains identical voltage specifications (14V standoff, 15.6V breakdown, 23.2V clamping) and operating temperature range. The 5KP14A provides enhanced current-handling capacity (219.8A peak pulse) and power dissipation (5000W), making it suitable for applications requiring higher transient energy absorption. Both parts are active products with RoHS3 compliance and ROHS3 certification. The P600 package differs from the DO-201AA form factor but maintains through-hole mounting compatibility.

SA14A (Fairchild Semiconductor): This substitute matches all critical voltage parameters and temperature specifications. The SA14A operates at reduced peak pulse current (22A) and power dissipation (500W) compared to the LCE14A. This part carries an obsolete product status and should be selected only when legacy system compatibility or existing inventory constraints necessitate its use. RoHS3 compliance is maintained. The DO-204AC (DO-15) package differs from the original DO-201AA specification.

Frequently Asked Questions (FAQ)

Q: Can the 5KP14A replace the LCE14A in all applications?

A: The 5KP14A maintains identical voltage specifications and operating temperature range, making it electrically compatible. The higher current and power ratings provide enhanced protection capability. Package form factor differs (P600 vs. DO-201AA), requiring verification of physical mounting space and PCB layout compatibility.

Q: Is the SA14A suitable as a direct substitute?

A: The SA14A meets all voltage and temperature requirements but operates at lower peak pulse current (22A vs. 65A) and power dissipation (500W vs. 1500W). Applications with transient energy levels exceeding 500W may not receive adequate protection. The obsolete product status indicates limited future availability.

Q: What are the key parameters that determine substitution eligibility?

A: Voltage - Reverse Standoff (14V), Voltage - Breakdown (15.6V minimum), Voltage - Clamping (23.2V maximum), unidirectional Zener configuration, through-hole mounting, and -55°C to 175°C operating temperature range are the primary criteria. Current and power ratings may vary based on application requirements.

Q: Do all substitutes maintain RoHS3 compliance?

A: Yes. The LCE14A, 5KP14A, and SA14A are all RoHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: How do package differences affect selection?

A: The LCE14A uses DO-201AA/DO-27 axial packaging, the 5KP14A uses P600 axial packaging, and the SA14A uses DO-204AC (DO-15) axial packaging. All are through-hole components, but physical dimensions and lead spacing differ. PCB layout and mounting equipment compatibility must be verified before substitution.