LCE22-B Equivalent & Substitute Parts

Part Overview

The LCE22-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 22V reverse standoff voltage with a 35.5V maximum clamping voltage and 42A peak pulse current capability in a DO-201 axial package format.

The LCE22-B is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and maintenance requirements for systems utilizing this component.

Substiute Parts

LCE22-B

Littelfuse Inc.In Stock: 765LCE22-B Datasheet

Current PartRFQ

LCE22A

Littelfuse Inc.In Stock: 1040LCE22A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LCE22-B is determined by electrical and mechanical parameter equivalence. The following criteria establish valid substitution:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Breakdown (Min): 24.4V
• Voltage - Clamping (Max) @ Ipp: 35.5V
• Current - Peak Pulse (10/1000µs): 42A
• Power - Peak Pulse: 1500W
• Operating Temperature Range: -55°C to 175°C (TJ)

Mechanical Parameters (Must Match):

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

Functional Category:

• Transient Voltage Suppressors (TVS)
• Manufacturer: Littelfuse Inc.

The LCE22A meets all electrical and mechanical requirements for direct substitution with the LCE22-B.

Parameter Comparison

Engineering Selection Recommendations

The LCE22A is the direct equivalent substitute for the obsolete LCE22-B. Both components are manufactured by Littelfuse Inc. and share identical electrical specifications and mechanical packaging.

Product Status Consideration: The LCE22-B is obsolete, while the LCE22A maintains active product status. Selection of the LCE22A ensures access to current manufacturing, quality assurance, and long-term supply availability.

Compliance Status: Both parts maintain equivalent regulatory compliance. The LCE22-B carries RoHS Compliant certification, while the LCE22A carries ROHS3 Compliant certification, representing an advancement in environmental compliance standards. The LCE22A additionally carries REACH Unaffected status, providing enhanced regulatory documentation.

Packaging Consideration: The LCE22-B is supplied in bulk packaging, while the LCE22A is supplied in Tape & Reel (TR) format. Both formats contain identical components with identical electrical and mechanical properties. Tape & Reel packaging is standard for automated assembly processes and provides improved component handling and traceability.

Application Compatibility: The LCE22-B was specified for telecom applications. The LCE22A is designated for general purpose applications, indicating broader applicability while maintaining full compatibility with the original telecom specification requirements.

Frequently Asked Questions (FAQ)

Q: Can the LCE22A directly replace the LCE22-B in existing designs?

A: Yes. The LCE22A provides direct electrical and mechanical substitution. All voltage ratings, current ratings, power dissipation, temperature range, and package specifications are identical. The component can be used as a direct replacement without circuit modification.

Q: What is the difference between the bulk packaging of the LCE22-B and the Tape & Reel packaging of the LCE22A?

A: Packaging format does not affect component electrical or mechanical properties. Bulk packaging is suitable for manual assembly and small-quantity applications. Tape & Reel packaging is optimized for automated pick-and-place assembly and provides improved component organization and traceability. The internal component specifications remain identical.

Q: Why is the LCE22-B listed as obsolete?

A: Obsolescence indicates that the manufacturer has discontinued production of this specific part number. The LCE22A represents the current active equivalent, ensuring access to ongoing manufacturing and supply chain support.

Q: Are there compliance differences between the LCE22-B and LCE22A?

A: Both parts meet RoHS requirements. The LCE22-B carries RoHS Compliant certification, while the LCE22A carries ROHS3 Compliant certification, representing updated environmental compliance standards. The LCE22A additionally carries REACH Unaffected status. These differences represent regulatory advancement rather than functional change.

Q: What are the key electrical parameters that define substitution for this TVS diode?

A: Substitution is determined by matching the following parameters: 22V reverse standoff voltage, 24.4V minimum breakdown voltage, 35.5V maximum clamping voltage, 42A peak pulse current, 1500W peak pulse power, and -55°C to 175°C operating temperature range. The LCE22A matches all these specifications.

Q: Can the LCE22A be used in telecom applications originally specified for the LCE22-B?

A: Yes. Although the LCE22A is designated for general purpose applications, it meets all electrical and mechanical requirements of the original telecom specification. The broader application designation indicates expanded compatibility rather than reduced capability.

Q: Is there any inventory consideration when selecting between these parts?

A: The LCE22-B has 665 pieces in stock as new original inventory. The LCE22A has 998 pieces in stock as new original inventory. For new designs or ongoing production, the LCE22A is recommended due to active product status and higher available inventory.