LCE26-B Equivalent & Substitute Parts

Part Overview

The LCE26-B is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 26V reverse standoff voltage with a 42.1V maximum clamping voltage and 36A peak pulse current capability in a DO-201 axial package. The LCE26-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

LCE26-B

Littelfuse Inc.In Stock: 777LCE26-B Datasheet

Current PartRFQ

LCE26A

LittelfuseIn Stock: 943LCE26A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete LCE26-B is determined by electrical and mechanical parameter equivalence within the LCE series. The substitute part must satisfy the following criteria:

Electrical Parameters (Critical for Substitution):

• Voltage - Reverse Standoff (Typ): 26V
• Voltage - Breakdown (Min): 28.9V
• Voltage - Clamping (Max) @ Ipp: 42.1V
• Current - Peak Pulse (10/1000µs): 36A
• Power - Peak Pulse: 1500W
• Operating Temperature Range: -55°C to 175°C (TJ)

Mechanical Parameters (Critical for Substitution):

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

The LCE26A meets all electrical and mechanical substitution criteria. The primary distinction is product status: LCE26A is active and available, whereas LCE26-B is obsolete. Both parts are manufactured by Littelfuse Inc. within the LCE series and share identical electrical performance specifications.

Parameter Comparison

Engineering Selection Recommendations

The LCE26A is the direct substitute for the obsolete LCE26-B. Both components are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications across all critical parameters: voltage ratings, current capacity, power dissipation, operating temperature range, and package configuration.

Compliance Considerations:

The LCE26A carries ROHS3 compliance certification, which supersedes the RoHS compliance of the LCE26-B. Both parts are REACH Unaffected and classified under ECCN EAR99, maintaining equivalent regulatory status. The MSL rating of 1 (Unlimited) is identical for both parts, indicating no moisture sensitivity constraints during storage or handling.

Availability and Product Status:

The LCE26-B is obsolete with limited remaining inventory (710 pieces). The LCE26A is an active product with greater availability (897 pieces in stock). For new designs and ongoing production requirements, the LCE26A is the appropriate selection to ensure long-term component supply continuity.

Packaging Consideration:

The LCE26A is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production environments. The LCE26-B packaging format is not specified in the provided data. Both parts utilize the DO-201 supplier device package, ensuring mechanical and electrical compatibility in circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can the LCE26A be used as a direct replacement for the LCE26-B in existing designs?

A: Yes. The LCE26A is electrically and mechanically equivalent to the LCE26-B. All critical parameters—voltage ratings, current capacity, power dissipation, temperature range, and package configuration—are identical. The LCE26A is the active equivalent part.

Q: What is the primary reason for substituting the LCE26-B?

A: The LCE26-B is classified as obsolete. The LCE26A is the active equivalent part from Littelfuse Inc. that maintains identical electrical and mechanical specifications while ensuring ongoing availability for production and field replacement applications.

Q: Are there any compliance differences between the LCE26-B and LCE26A?

A: Both parts are RoHS compliant. The LCE26A carries ROHS3 certification, which represents a current compliance standard. Both parts are REACH Unaffected and classified under ECCN EAR99. Regulatory status is equivalent for both components.

Q: What is the difference in packaging between these parts?

A: The LCE26A is supplied in Tape & Reel (TR) packaging, standard for production environments. Both parts use the DO-201 supplier device package, ensuring identical physical dimensions and circuit board compatibility.

Q: Are the electrical specifications identical between LCE26-B and LCE26A?

A: Yes. Both parts share identical specifications: 26V reverse standoff voltage, 28.9V minimum breakdown voltage, 42.1V maximum clamping voltage, 36A peak pulse current, 1500W peak pulse power, and -55°C to 175°C operating temperature range.

Q: What is the moisture sensitivity level for the LCE26A?

A: The LCE26A has an MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints. Storage and handling do not require special moisture control measures.

Q: Is the LCE26A suitable for telecom applications?

A: The LCE26A is classified for general-purpose applications. The LCE26-B was specified for telecom applications. Both parts possess identical electrical and mechanical characteristics suitable for transient voltage suppression across multiple application categories, including telecom environments.