LCE7.5-B Equivalent & Substitute Parts

Part Overview

The LCE7.5-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 7.5V reverse standoff voltage with a 12.9V maximum clamping voltage and 100A peak pulse current capability in a DO-201 axial package. The LCE7.5-B is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure ongoing component availability for new production and field replacements.

Substiute Parts

LCE7.5-B

Littelfuse Inc.In Stock: 760LCE7.5-B Datasheet

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LCE7.5A

LittelfuseIn Stock: 1007LCE7.5A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete LCE7.5-B is determined by electrical and mechanical parameter equivalence within the LCE series. The substitute part must maintain identical specifications across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Breakdown (Min): 8.33V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Current - Peak Pulse (10/1000µs): 100A
• Power - Peak Pulse: 1500W
• Operating Temperature Range: -55°C to 175°C
• Package / Case: DO-201AA, DO-27, Axial
• Type: Zener, Unidirectional (1 channel)

The LCE7.5A meets all substitution criteria and is classified as an active product with current manufacturing status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The LCE7.5A is the direct functional equivalent for the obsolete LCE7.5-B. Both components are manufactured by Littelfuse within the same LCE series and share identical electrical and mechanical specifications. The LCE7.5A holds active product status, ensuring continued availability and manufacturing support.

Compliance certifications are equivalent or enhanced: both parts are RoHS compliant (LCE7.5A carries ROHS3 designation), maintain identical moisture sensitivity levels, and share the same export classification (EAR99) and tariff codes. The LCE7.5A is supplied in Cut Tape (CT) packaging with Through Hole mounting configuration, maintaining compatibility with standard PCB assembly processes.

Selection of the LCE7.5A eliminates obsolescence risk while preserving all electrical performance characteristics required for telecom and general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can the LCE7.5A directly replace the LCE7.5-B in existing designs?

A: Yes. The LCE7.5A is electrically and mechanically identical to the LCE7.5-B across all specified parameters, including voltage ratings, current capacity, temperature range, and DO-201 axial package configuration. No circuit modifications are required.

Q: What is the primary difference between these two parts?

A: The LCE7.5-B is classified as obsolete, while the LCE7.5A is an active product. The LCE7.5A also carries ROHS3 compliance certification compared to the LCE7.5-B's RoHS Compliant designation. Functionally, both parts are equivalent.

Q: Are there packaging differences between LCE7.5-B and LCE7.5A?

A: Both parts use the DO-201 axial package. The LCE7.5A is supplied in Cut Tape (CT) packaging format, which is standard for automated assembly processes. The LCE7.5-B packaging format is not specified in available documentation.

Q: What applications are suitable for the LCE7.5A?

A: The LCE7.5A is rated for general-purpose transient voltage suppression. The original LCE7.5-B was specified for telecom applications. The LCE7.5A's broader application classification and active status make it suitable for both original telecom designs and expanded general-purpose implementations.

Q: Are there any compliance or certification concerns when substituting these parts?

A: No. Both parts maintain equivalent or enhanced compliance status. The LCE7.5A's ROHS3 certification exceeds the LCE7.5-B's RoHS Compliant status. Both parts share identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications, ensuring consistent regulatory treatment.

Q: What is the moisture sensitivity level for the LCE7.5A?

A: The LCE7.5A carries MSL 1 (Unlimited) rating, identical to the LCE7.5-B. This indicates no moisture sensitivity restrictions and no special storage or handling requirements.