LCE13-B Equivalent & Substitute Parts

Part Overview

The LCE13-B is a unidirectional Zener-type Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 13V reverse standoff voltage with a 21.5V maximum clamping voltage and 70A peak pulse current capability in a DO-201 axial package. The LCE13-B is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure ongoing component availability for production and field service applications.

Substiute Parts

LCE13-B

Littelfuse Inc.In Stock: 1174LCE13-B Datasheet

Current PartRFQ

LCE13A

Littelfuse Inc.In Stock: 944LCE13A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete LCE13-B is determined by electrical and mechanical parameter equivalence within the TVS diode category. The primary substitute, LCE13A, maintains identical electrical specifications across all critical parameters: 13V reverse standoff voltage, 14.4V minimum breakdown voltage, 21.5V maximum clamping voltage, 70A peak pulse current, and 1500W peak pulse power dissipation. Both components operate across the same temperature range (-55°C to 175°C junction temperature) and utilize the same DO-201 axial package configuration.

The substitution logic is based on the following key parameters:

• Voltage - Reverse Standoff (Typ): 13V
• Voltage - Breakdown (Min): 14.4V
• Voltage - Clamping (Max) @ Ipp: 21.5V
• Current - Peak Pulse (10/1000µs): 70A
• Power - Peak Pulse: 1500W
• Operating Temperature Range: -55°C to 175°C
• Package / Case: DO-201AA, DO-27, Axial
• Type: Zener, Unidirectional

Parameter Comparison

Engineering Selection Recommendations

The LCE13A is the direct equivalent substitute for the obsolete LCE13-B. Both components are manufactured by Littelfuse Inc. within the LCE series and provide identical electrical performance across all specified parameters. The LCE13A maintains active product status, ensuring long-term availability and supply chain continuity.

From a compliance perspective, the LCE13A carries ROHS3 certification, which supersedes the RoHS Compliant status of the LCE13-B, providing enhanced environmental compliance. Both components achieve Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling restrictions.

The packaging configuration remains unchanged: both components utilize the DO-201 axial package, enabling direct mechanical and electrical substitution without circuit board redesign or layout modifications. The through-hole mounting type of the LCE13A is consistent with the axial package specification of the LCE13-B.

Selection of the LCE13A for replacement applications is supported by identical electrical specifications, superior product status, and enhanced regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the LCE13A be used as a direct replacement for the LCE13-B in existing designs?

A: Yes. The LCE13A provides identical electrical specifications across all critical parameters: 13V reverse standoff voltage, 21.5V clamping voltage, 70A peak pulse current, and 1500W peak pulse power. Both components utilize the DO-201 axial package, enabling direct substitution without circuit modifications.

Q: What is the primary difference between the LCE13-B and LCE13A?

A: The LCE13-B is classified as obsolete, while the LCE13A maintains active product status. The LCE13A also carries ROHS3 certification compared to the RoHS Compliant status of the LCE13-B. All electrical and mechanical parameters are identical.

Q: Are there any packaging differences between these components?

A: Both the LCE13-B and LCE13A are supplied in DO-201 axial packages. The LCE13A is available in Tape & Reel (TR) packaging format, which is standard for active production components. No package case differences exist that would affect circuit board compatibility.

Q: What temperature range do these components support?

A: Both the LCE13-B and LCE13A operate across an identical temperature range of -55°C to 175°C junction temperature (TJ), suitable for industrial and telecom applications.

Q: Are moisture sensitivity considerations relevant for these components?

A: Both components achieve Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling or storage restrictions. Standard component handling practices apply.

Q: What is the peak pulse current rating for this TVS diode?

A: The peak pulse current rating is 70A for both the LCE13-B and LCE13A, measured at a 10/1000µs pulse waveform.

Q: Can the LCE13A be used in telecom applications?

A: The LCE13A is classified for general-purpose applications. The LCE13-B was specifically designated for telecom applications. Electrical specifications are identical; application suitability should be confirmed against specific circuit requirements and industry standards.