LCE7.5 Equivalent & Substitute Parts

Part Overview

The LCE7.5 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. This component features a 7.5V reverse standoff voltage with a 14.65V maximum clamping voltage at peak pulse current. The LCE7.5 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain the core electrical characteristics: 7.5V reverse standoff voltage, through-hole mounting, and compatible thermal operating range.

Substiute Parts

LCE7.5

Littelfuse Inc.In Stock: 859LCE7.5 Datasheet

Current PartRFQ

LCE7.5A

LittelfuseIn Stock: 1007LCE7.5A Datasheet

DirectRFQ

5KP7.5A-TP

Micro Commercial CoIn Stock: 10325KP7.5A-TP Datasheet

MFR RecommendedRFQ

5KP7.5E3/TR13

Microchip TechnologyIn Stock: 10885KP7.5E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LCE7.5 are qualified based on the following criteria:

• Reverse standoff voltage of 7.5V (matching the primary voltage rating)
• Unidirectional Zener diode configuration with single channel
• Through-hole axial mounting capability
• Operating temperature range of -55°C to 175°C
• ROHS3 compliance and EAR99 ECCN classification
• General-purpose overvoltage protection applications

The three qualified substitutes—LCE7.5A, 5KP7.5A-TP, and 5KP7.5E3/TR13—meet these core requirements while offering variations in clamping voltage, peak pulse current handling, and package configurations. Selection depends on specific application requirements for clamping voltage tolerance and peak pulse current capacity.

Parameter Comparison

Engineering Selection Recommendations

LCE7.5A is the direct functional equivalent from Littelfuse, maintaining the same manufacturer lineage and electrical performance envelope. This part is active in production and ROHS3 compliant, making it the primary choice for direct replacement in existing designs. The LCE7.5A offers identical peak pulse current (100A) and power dissipation (1500W) with a slightly lower clamping voltage (12.9V vs. 14.65V), which may provide improved transient suppression in applications with tighter voltage margins.

5KP7.5A-TP from Micro Commercial Co provides equivalent voltage ratings and thermal performance with enhanced power dissipation capability (5000W vs. 1500W). This part is suitable for applications requiring higher energy absorption during transient events, though the R-6 package differs from the DO-201 form factor. Peak pulse current specification is not provided for this variant.

5KP7.5E3/TR13 from Microchip Technology offers the highest peak pulse current rating (350A) and power dissipation (5000W), making it appropriate for high-energy transient protection scenarios. The P600 package configuration and Tape & Reel packaging format support high-volume production environments. The clamping voltage of 14.3V is slightly elevated compared to the original LCE7.5.

All three substitutes maintain ROHS3 compliance, EAR99 classification, and the required operating temperature range. Selection should be based on specific application requirements for clamping voltage tolerance, peak pulse current demands, and package compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can LCE7.5A be used as a direct replacement for LCE7.5?

A: Yes. The LCE7.5A maintains the same 7.5V reverse standoff voltage, 100A peak pulse current, 1500W power dissipation, and DO-201 through-hole package. The primary difference is the clamping voltage specification (12.9V vs. 14.65V), which represents improved transient suppression performance. LCE7.5A is active in production, whereas LCE7.5 is obsolete.

Q: What are the package differences between substitute options?

A: LCE7.5A uses the DO-201AA/DO-27 axial package, identical to the original LCE7.5. The 5KP7.5A-TP uses an R-6 axial package, and the 5KP7.5E3/TR13 uses a P600 axial package. All three are through-hole axial configurations suitable for PCB mounting, but physical dimensions and lead spacing may differ. Verify PCB footprint compatibility before selection.

Q: When should I select 5KP7.5A-TP or 5KP7.5E3/TR13 over LCE7.5A?

A: Select 5KP7.5A-TP when your application requires higher energy absorption (5000W vs. 1500W) but maintains the same peak pulse current specification. Select 5KP7.5E3/TR13 when transient events exceed 100A peak pulse current or when 5000W power dissipation is required. Both alternatives are suitable for high-energy protection scenarios where the original LCE7.5 specifications are insufficient.

Q: Are all substitutes ROHS3 compliant?

A: Yes. LCE7.5A, 5KP7.5A-TP, and 5KP7.5E3/TR13 are all ROHS3 compliant with EAR99 ECCN classification, matching the regulatory status of the original LCE7.5.

Q: What is the significance of the clamping voltage differences?

A: Clamping voltage determines the maximum voltage the TVS diode allows across its terminals during a transient event. LCE7.5 clamps at 14.65V, LCE7.5A at 12.9V, and 5KP7.5E3/TR13 at 14.3V. Lower clamping voltages provide better protection for sensitive downstream components. Selection depends on the maximum voltage tolerance of protected circuitry.

Q: Can these parts be used interchangeably in high-volume production?

A: LCE7.5A is the recommended choice for direct replacement due to identical package and electrical specifications. For high-volume applications, 5KP7.5E3/TR13 in Tape & Reel format may offer supply chain advantages and automated assembly compatibility. Verify packaging format requirements with your production process before final selection.