LCE45A Equivalent & Substitute Parts

Part Overview

The LCE45A 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 in active production status with 1886 units available in inventory. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining electrical and mechanical compatibility.

Substiute Parts

LCE45A

Littelfuse Inc.In Stock: 1926LCE45A Datasheet

Current PartRFQ

1.5KE47A

Taiwan Semiconductor CorporationIn Stock: 368961.5KE47A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LCE45A with the 1.5KE47A is based on the following electrical and mechanical compatibility criteria:

Electrical Compatibility Parameters:

• Both components are unidirectional Zener-type TVS diodes with single channel configuration
• Both operate at 1500W peak pulse power rating
• Both are rated for through-hole mounting in DO-201 package format
• Both maintain RoHS3 compliance and REACH unaffected status

Voltage Operating Range: The 1.5KE47A operates with a reverse standoff voltage of 40.2V and breakdown voltage of 44.7V, compared to the LCE45A's 45V standoff and 50V breakdown. The clamping voltage of 64.8V for the 1.5KE47A is lower than the LCE45A's 72.7V, providing tighter transient suppression characteristics.

Current Handling: The 1.5KE47A supports 24A peak pulse current versus the LCE45A's 20.6A, offering improved surge capacity within the same power envelope.

Temperature and Compliance: The 1.5KE47A operates across -55°C to 175°C, which encompasses the critical upper temperature range of the LCE45A while providing a slightly reduced lower temperature specification. Both components maintain identical RoHS3 and REACH compliance status.

Parameter Comparison

Engineering Selection Recommendations

Selection between the LCE45A and 1.5KE47A should be based on the following criteria:

Primary Selection Factors:

• Both components maintain active product status and full RoHS3 compliance
• Both are certified REACH unaffected
• Identical through-hole DO-201 package compatibility ensures direct mechanical substitution

Voltage Specification Considerations: The 1.5KE47A operates at a lower reverse standoff voltage (40.2V vs. 45V) and lower clamping voltage (64.8V vs. 72.7V). This characteristic is suitable for applications requiring tighter transient suppression but may not be appropriate for circuits designed specifically for the LCE45A's higher voltage thresholds.

Current Capacity: The 1.5KE47A's higher peak pulse current rating (24A vs. 20.6A) within the same 1500W power envelope provides additional surge handling capability.

Temperature Range: The LCE45A supports operation down to -65°C, while the 1.5KE47A is rated to -55°C. Applications requiring extended low-temperature operation must retain the LCE45A.

Inventory and Availability: The 1.5KE47A maintains significantly higher inventory levels (36829 units vs. 1886 units), making it the preferred choice when supply continuity is a priority.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE47A directly replace the LCE45A in all applications?

A: Direct replacement is mechanically feasible due to identical DO-201 package format and through-hole mounting. However, electrical compatibility depends on circuit design. The 1.5KE47A's lower standoff voltage (40.2V vs. 45V) and lower clamping voltage (64.8V vs. 72.7V) make it suitable only for applications where these lower thresholds are acceptable. Circuits designed specifically for the LCE45A's voltage characteristics may require design review.

Q: What are the key electrical differences between these parts?

A: The primary differences are voltage specifications and peak current capacity. The 1.5KE47A operates at lower voltage thresholds (40.2V standoff vs. 45V, 44.7V breakdown vs. 50V, 64.8V clamping vs. 72.7V) but supports higher peak pulse current (24A vs. 20.6A). Both maintain identical 1500W power ratings and through-hole package format.

Q: Are there temperature range limitations when substituting?

A: Yes. The LCE45A operates from -65°C to 175°C, while the 1.5KE47A operates from -55°C to 175°C. Applications requiring operation below -55°C must use the LCE45A. Both components support the full upper temperature range of 175°C.

Q: Do both parts have identical compliance certifications?

A: Yes. Both the LCE45A and 1.5KE47A are RoHS3 compliant and REACH unaffected. Both carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications, ensuring regulatory compatibility.

Q: What packaging formats are available for both parts?

A: Both components are available in DO-201AA, DO-27, and Axial package formats. The LCE45A is supplied in Cut Tape (CT) packaging, while the 1.5KE47A is supplied in Tape & Reel (TR) format. Both are suitable for through-hole PCB assembly.

Q: Which part should be selected for new designs?

A: Selection depends on specific circuit voltage requirements. For applications requiring the LCE45A's higher voltage thresholds and extended low-temperature operation, retain the LCE45A. For applications where lower voltage suppression and higher current capacity are beneficial, the 1.5KE47A is suitable. Verify voltage specifications against circuit protection requirements before final selection.