LCE17-B Equivalent & Substitute Parts

Part Overview

The LCE17-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 17V reverse standoff voltage with a 27.6V maximum clamping voltage and 54A peak pulse current capability in a DO-201 axial package. The LCE17-B is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and procurement planning.

Substiute Parts

LCE17-B

Littelfuse Inc.In Stock: 1070LCE17-B Datasheet

Current PartRFQ

LCE17A

Littelfuse Inc.In Stock: 839LCE17A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LCE17-B is determined by electrical and mechanical parameter equivalence within the TVS diode category. The critical parameters governing substitution are:

Electrical Parameters:

• Voltage - Reverse Standoff: 17V
• Voltage - Breakdown (Min): 18.9V
• Voltage - Clamping (Max) @ Ipp: 27.6V
• Current - Peak Pulse (10/1000µs): 54A
• Power - Peak Pulse: 1500W

Mechanical Parameters:

• Package / Case: DO-201AA, DO-27, Axial
• Unidirectional Channels: 1
• Operating Temperature Range: -55°C to 175°C

The LCE17A qualifies as a direct substitute, maintaining identical electrical specifications and package configuration while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The LCE17A is the direct equivalent substitute for the obsolete LCE17-B. Both components share identical electrical specifications and mechanical packaging, ensuring functional compatibility in existing circuit designs.

Selection Basis:

The LCE17A is recommended for new procurement and system redesigns due to its active product status with Littelfuse Inc. The component maintains full electrical equivalence across all critical parameters: 17V reverse standoff voltage, 27.6V clamping voltage, and 54A peak pulse current capability.

Compliance considerations favor the LCE17A, which carries ROHS3 certification compared to the LCE17-B's RoHS Compliant designation. Both components maintain MSL Level 1 (Unlimited) moisture sensitivity rating and share identical ECCN and HTSUS classifications.

The LCE17A is supplied in Tape & Reel packaging format, supporting automated assembly processes, while maintaining the through-hole DO-201 axial package configuration required for board-level integration.

Frequently Asked Questions (FAQ)

Q: Can the LCE17A directly replace the LCE17-B in existing designs?

A: Yes. The LCE17A provides complete electrical and mechanical equivalence to the LCE17-B. All voltage ratings, current specifications, temperature operating range, and package dimensions are identical. Direct substitution is supported without circuit modification.

Q: What is the primary reason for substituting the LCE17-B?

A: The LCE17-B is classified as obsolete. The LCE17A is the active equivalent from the same manufacturer, ensuring continued availability and supply chain reliability.

Q: Are there packaging differences between LCE17-B and LCE17A?

A: Both components use the DO-201AA axial package. The LCE17A is supplied in Tape & Reel format, which is standard for production environments. The LCE17-B was supplied in bulk packaging. The physical component dimensions and board-level footprint remain identical.

Q: Do compliance certifications differ between these parts?

A: The LCE17A carries ROHS3 certification, representing the current RoHS standard. The LCE17-B carries RoHS Compliant designation. Both components are compliant with current environmental regulations. The LCE17A also includes REACH Unaffected status documentation.

Q: What are the critical electrical parameters for TVS diode substitution?

A: For the LCE17-B/LCE17A family, the critical parameters are: 17V reverse standoff voltage, 18.9V minimum breakdown voltage, 27.6V maximum clamping voltage at peak pulse current, and 54A peak pulse current (10/1000µs waveform). All substitute parts must match these specifications exactly.

Q: Is the LCE17A suitable for telecom applications?

A: The LCE17A is classified for general purpose applications. However, it maintains all electrical and thermal specifications required for telecom transient voltage suppression. The component's 1500W peak pulse power rating and -55°C to 175°C operating temperature range support telecom system requirements.

Q: What is the inventory status for these components?

A: The LCE17-B has 966 pieces in stock (obsolete status). The LCE17A has 791 pieces in stock with active product status, ensuring ongoing availability for future orders.