LCE90A Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The LCE90A is an active Littelfuse Inc. unidirectional Zener-type transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. Packaged in DO-201AA through-hole configuration with 1500W peak pulse power rating, this component provides 90V reverse standoff voltage with 146V maximum clamping voltage. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance parameters and mechanical compatibility are required due to inventory constraints, application-specific power requirements, or package form factor preferences.

Substiute Parts

LCE90A

Littelfuse Inc.In Stock: 1985LCE90A Datasheet

Current PartRFQ

5KP90A

Littelfuse Inc.In Stock: 44665KP90A Datasheet

MFR RecommendedRFQ

1.5KE91A-TP

Micro Commercial CoIn Stock: 21491.5KE91A-TP Datasheet

MFR RecommendedRFQ

15KP90A-TP

Micro Commercial CoIn Stock: 127815KP90A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LCE90A is determined by matching the following critical electrical parameters: reverse standoff voltage (90V nominal), breakdown voltage minimum (100V), and clamping voltage maximum (146V). All substitute parts must maintain unidirectional Zener-type TVS diode functionality with through-hole axial mounting configuration and active product status.

The substitute parts are grouped into two categories based on power dissipation capability:

Category 1: Equivalent Power Rating (1500W) Parts maintaining the original 1500W peak pulse power specification with identical voltage characteristics and through-hole mounting.

Category 2: Enhanced Power Rating (5000W and 15000W) Parts with identical voltage specifications but increased power dissipation capability, suitable for applications requiring higher transient energy absorption while maintaining the same clamping and standoff voltage performance.

All substitutes maintain RoHS3 compliance, unlimited moisture sensitivity rating, and active product status.

Parameter Comparison

Engineering Selection Recommendations

5KP90A (Littelfuse Inc.) This part maintains identical voltage specifications (90V standoff, 100V breakdown, 146V clamping) with increased power dissipation (5000W vs. 1500W). Package form factor changes from DO-201AA to P600 axial configuration. Operating temperature minimum increases from -65°C to -55°C. Suitable for applications requiring higher transient energy absorption within the same voltage protection window. Active product status with full RoHS3 compliance.

1.5KE91A-TP (Micro Commercial Co) This part deviates from the primary voltage specification with 77.8V standoff voltage, 86.5V breakdown minimum, and 125V clamping voltage. Power rating remains equivalent at 1500W. Package changes to DO-201AE axial configuration. Operating temperature minimum increases to -55°C. Selection of this part requires confirmation that the lower voltage thresholds are compatible with the protected circuit design. Active product status with full RoHS3 compliance.

15KP90A-TP (Micro Commercial Co) This part maintains identical voltage specifications (90V standoff, 100V breakdown, 146V clamping) with significantly increased power dissipation (15000W vs. 1500W). Package form factor changes from DO-201AA to R-6 axial configuration. Operating temperature minimum increases to -55°C. Suitable for high-energy transient protection applications. Active product status with full RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the 5KP90A directly replace the LCE90A in my circuit? A: The 5KP90A maintains identical voltage protection characteristics (90V standoff, 146V clamping) and through-hole axial mounting. The primary difference is increased power dissipation capability (5000W vs. 1500W) and package form factor change from DO-201AA to P600. Physical board layout compatibility must be verified due to package geometry differences.

Q: Why does the 1.5KE91A-TP have different voltage ratings? A: The 1.5KE91A-TP operates at 77.8V standoff voltage with 125V clamping, which differs from the LCE90A specification. This part is listed as a substitute only when circuit protection requirements allow for lower voltage thresholds. Direct substitution requires circuit design verification.

Q: What is the advantage of the 15KP90A-TP over the LCE90A? A: The 15KP90A-TP provides identical voltage protection (90V standoff, 146V clamping) but with 10 times greater power dissipation capability (15000W vs. 1500W). This is beneficial for applications experiencing high-energy transient events. Package form factor changes from DO-201AA to R-6 axial configuration.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts (5KP90A, 1.5KE91A-TP, 15KP90A-TP) maintain ROHS3 compliance and unlimited moisture sensitivity rating, matching the environmental and regulatory status of the LCE90A.

Q: Do the substitute parts have the same operating temperature range? A: The LCE90A operates from -65°C to 175°C. The substitute parts (5KP90A, 1.5KE91A-TP, 15KP90A-TP) operate from -55°C to 175°C. The minimum operating temperature is 10°C higher for all substitutes. Applications requiring operation below -55°C must retain the LCE90A.

Q: What package considerations apply when selecting a substitute? A: The LCE90A uses DO-201AA package. Substitutes use different axial packages: 5KP90A (P600), 1.5KE91A-TP (DO-201AE), and 15KP90A-TP (R-6). Physical dimensions and PCB footprint compatibility must be verified before implementation.