LCE43A Equivalent & Substitute Parts

Part Overview

The LCE43A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This through-hole component operates across a temperature range of -65°C to 175°C and is RoHS3 compliant. The part is currently active in production with 966 units in stock. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, higher current handling capacity, or different power dissipation specifications while maintaining compatible electrical characteristics and package compatibility.

Substiute Parts

LCE43A

Littelfuse Inc.In Stock: 994LCE43A Datasheet

Current PartRFQ

1.5KE43A

Taiwan Semiconductor CorporationIn Stock: 368361.5KE43A Datasheet

MFR RecommendedRFQ

5KP43A

Littelfuse Inc.In Stock: 34105KP43A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LCE43A are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 36.8V to 43V
• Voltage - Clamping (Max) @ Ipp: 59.3V to 69.4V
• Unidirectional channel configuration
• Through-hole mounting type
• DO-201 or compatible axial package
• RoHS3 compliance
• Operating temperature range compatibility

Substitute Parts Identified:

1. 1.5KE43A (Taiwan Semiconductor Corporation): Meets voltage standoff and clamping specifications with 26A peak pulse current and 1500W power rating. Compatible DO-201 package and RoHS3 compliant. Operating temperature range -55°C to 175°C.

2. 5KP43A (Littelfuse Inc.): Maintains identical voltage specifications (43V standoff, 69.4V clamping) with enhanced current handling at 74.6A peak pulse and 5000W power dissipation. P600 package with axial configuration. Operating temperature range -55°C to 175°C.

Parameter Comparison

Engineering Selection Recommendations

LCE43A Selection: Appropriate for applications requiring 1500W peak pulse power dissipation with 21.6A peak current handling. Extended operating temperature range (-65°C to 175°C) supports demanding thermal environments. RoHS3 compliance and unlimited moisture sensitivity rating ensure regulatory and environmental compatibility.

1.5KE43A Selection: Suitable as a direct substitute when sourcing from Taiwan Semiconductor Corporation is preferred or when LCE43A availability is constrained. Delivers equivalent 1500W power rating with slightly higher peak current (26A). Minimum operating temperature of -55°C is acceptable for applications not requiring the extended -65°C lower limit. RoHS3 compliant with identical moisture sensitivity classification.

5KP43A Selection: Specified when circuit design requires enhanced transient energy absorption beyond 1500W, supporting up to 5000W peak pulse dissipation with 74.6A peak current. Maintains identical voltage specifications to LCE43A (43V standoff, 69.4V clamping). P600 package provides larger physical footprint suitable for higher energy applications. RoHS3 compliant. Minimum operating temperature of -55°C applies.

All substitute parts maintain RoHS3 compliance, REACH unaffected status, and EAR99 export classification consistent with the primary part.

Frequently Asked Questions (FAQ)

Q: Can 1.5KE43A directly replace LCE43A in all applications?

A: 1.5KE43A is electrically compatible for applications operating above -55°C. The primary difference is the lower operating temperature limit (-55°C versus -65°C for LCE43A). Voltage specifications and power ratings are equivalent. Package compatibility is maintained in DO-201 configuration.

Q: When should 5KP43A be selected over LCE43A?

A: 5KP43A is selected when transient energy levels exceed 1500W or when peak pulse currents exceed 21.6A. The 5000W power rating and 74.6A peak current capability provide enhanced protection margin. Voltage clamping characteristics remain identical. P600 package accommodates higher thermal dissipation requirements.

Q: Are all three parts RoHS3 compliant?

A: Yes. LCE43A, 1.5KE43A, and 5KP43A are all RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with modern manufacturing and environmental standards.

Q: What is the voltage standoff difference between LCE43A and 1.5KE43A?

A: LCE43A specifies 43V typical reverse standoff voltage, while 1.5KE43A specifies 36.8V. This 6.2V difference may be significant in applications with tight voltage margin requirements. Verify circuit protection thresholds before substitution.

Q: Can these parts be used interchangeably in PCB layouts?

A: LCE43A and 1.5KE43A share DO-201 package compatibility and axial through-hole mounting, allowing direct PCB layout interchange. 5KP43A uses P600 package with larger physical dimensions, requiring PCB layout modification and potentially different lead spacing.

Q: What compliance certifications apply to all substitute parts?

A: All three parts are RoHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. Moisture sensitivity level is 1 (unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.