LCE11-B Equivalent & Substitute Parts

Part Overview

The LCE11-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features an 11V reverse standoff voltage with an 18.2V maximum clamping voltage and 82A peak pulse current capability in a DO-201 axial package. The LCE11-B is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and new design implementations where this component specification is required.

Substiute Parts

LCE11-B

Littelfuse Inc.In Stock: 969LCE11-B Datasheet

Current PartRFQ

LCE11A

Littelfuse Inc.In Stock: 830LCE11A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LCE11-B is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 11V
• Voltage - Breakdown (Min): 12.2V
• Voltage - Clamping (Max) @ Ipp: 18.2V
• Current - Peak Pulse (10/1000µs): 82A
• Power - Peak Pulse: 1500W
• Operating Temperature Range: -55°C to 175°C (TJ)

Mechanical Equivalence Criteria:

• Package / Case: DO-201AA, DO-27, Axial
• Unidirectional Channels: 1
• Type: Zener

Compliance Criteria:

• RoHS Status: RoHS Compliant or higher
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The LCE11A meets all specified electrical and mechanical parameters while maintaining equivalent or superior compliance certifications. The primary distinction is product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The LCE11A is the direct equivalent substitute for the obsolete LCE11-B. Both components share identical electrical specifications across all critical parameters: 11V reverse standoff voltage, 12.2V minimum breakdown voltage, 18.2V maximum clamping voltage, and 82A peak pulse current.

The LCE11A offers the following advantages for component selection:

Product Status: The LCE11A maintains Active product status, ensuring long-term availability and continued manufacturer support, whereas the LCE11-B is classified as Obsolete.

Compliance Enhancement: The LCE11A carries ROHS3 Compliant certification, representing a higher compliance standard than the RoHS Compliant designation of the LCE11-B.

Packaging Flexibility: The LCE11A is supplied in Tape & Reel (TR) configuration, suitable for automated assembly processes, while the LCE11-B is supplied in bulk packaging.

Mechanical Compatibility: Both components utilize identical DO-201AA axial package geometry, ensuring direct mechanical interchangeability in through-hole applications.

For applications requiring the LCE11-B specification, the LCE11A provides complete electrical and mechanical substitution with enhanced product lifecycle support and compliance certification.

Frequently Asked Questions (FAQ)

Q: Can the LCE11A be used as a direct replacement for the LCE11-B in existing designs?

A: Yes. The LCE11A provides complete electrical and mechanical equivalence. Both components feature identical voltage ratings (11V reverse standoff, 18.2V clamping), current ratings (82A peak pulse), and operating temperature ranges (-55°C to 175°C). The DO-201 axial package geometry is identical, enabling direct substitution in through-hole circuit board layouts.

Q: What is the primary difference between the LCE11-B and LCE11A?

A: The primary differences are product status and packaging configuration. The LCE11-B is classified as Obsolete, while the LCE11A maintains Active status. The LCE11A is supplied in Tape & Reel (TR) packaging suitable for automated assembly, whereas the LCE11-B is supplied in bulk packaging. Additionally, the LCE11A carries ROHS3 Compliant certification compared to the RoHS Compliant status of the LCE11-B.

Q: Are there any electrical performance differences between these components?

A: No. Both components are manufactured by Littelfuse Inc. within the LCE series and share identical electrical specifications: 11V reverse standoff voltage, 12.2V minimum breakdown voltage, 18.2V maximum clamping voltage at peak pulse current, 82A peak pulse current (10/1000µs), and 1500W peak pulse power rating. Operating temperature range is identical at -55°C to 175°C (TJ).

Q: What packaging considerations apply when substituting the LCE11A for the LCE11-B?

A: Both components utilize the DO-201AA axial package with identical mechanical dimensions. The LCE11A is supplied in Tape & Reel (TR) format for automated pick-and-place assembly, while the LCE11-B is supplied in bulk. This difference affects procurement and assembly processes but does not impact electrical performance or physical fit in circuit board applications.

Q: Is the LCE11A suitable for telecom applications?

A: The LCE11A is classified for General Purpose applications. The LCE11-B was specified for Telecom applications. Both components meet identical electrical and thermal specifications. Application suitability depends on specific circuit requirements and system-level compliance standards beyond component-level electrical parameters.

Q: What is the moisture sensitivity level for the LCE11A?

A: The LCE11A carries Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions. This matches the LCE11-B specification and allows unlimited shelf life without special storage or handling requirements.

Q: Are both components RoHS compliant?

A: Yes. The LCE11-B is RoHS Compliant. The LCE11A carries ROHS3 Compliant certification, which represents a higher compliance standard. Both components meet RoHS requirements for restricted substance elimination.