LCE28-B Equivalent & Substitute Parts

Part Overview

The LCE28-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 28V reverse standoff voltage with a 45.5V maximum clamping voltage and 33A peak pulse current capability in a DO-201 axial package. The LCE28-B is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system maintenance, repairs, and component sourcing. Substitute parts must maintain identical electrical performance characteristics and package compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

LCE28-B

Littelfuse Inc.In Stock: 901LCE28-B Datasheet

Current PartRFQ

LCE28A

Littelfuse Inc.In Stock: 2122LCE28A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LCE28-B are qualified based on strict electrical and mechanical parameter matching. The primary substitute, LCE28A, is a direct equivalent manufactured by Littelfuse Inc. that maintains all critical electrical specifications: 28V reverse standoff voltage, 31.1V minimum breakdown voltage, 45.5V maximum clamping voltage, and 33A peak pulse current. Both components operate across the identical temperature range (-55°C to 175°C) and utilize the same DO-201 axial package configuration.

The key differentiator between LCE28-B and LCE28A is product status and packaging format. The LCE28-B is obsolete, while LCE28A is active production. The LCE28A is supplied in Cut Tape (CT) packaging, whereas the LCE28-B packaging format is not specified. Both components are RoHS compliant and share identical electrical performance parameters, making LCE28A the primary direct substitute.

Secondary substitutes (3KP28A-TP, SA28A, 5KP28A) are listed as alternatives to LCE28A but are not directly compared in this reference due to incomplete parameter data in the provided input. Substitution decisions must be based on the following critical parameters:

• Voltage - Reverse Standoff: 28V
• Voltage - Clamping (Max) @ Ipp: 45.5V
• Current - Peak Pulse: 33A
• Package Type: DO-201 Axial
• Unidirectional Configuration: 1 Channel

Parameter Comparison

Engineering Selection Recommendations

The LCE28A is the direct equivalent substitute for the obsolete LCE28-B. Both components are manufactured by Littelfuse Inc. and share identical electrical specifications across all critical parameters: reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and power dissipation. The operating temperature range and package configuration are identical, confirming mechanical and thermal compatibility.

The LCE28A offers the advantage of active product status, ensuring continued availability and supply chain reliability. The LCE28A is supplied in Cut Tape (CT) packaging, which is standard for production environments. Both components maintain RoHS compliance, with LCE28A meeting the more recent ROHS3 standard. The LCE28A also carries REACH Unaffected status, providing additional regulatory assurance.

For applications requiring the LCE28-B, the LCE28A provides a direct, pin-compatible replacement without circuit modification. The identical electrical performance ensures equivalent transient voltage suppression in telecom and general-purpose applications. Component selection should prioritize LCE28A for new designs and replacement applications due to its active production status and superior supply availability.

Frequently Asked Questions (FAQ)

Q: Can LCE28A be used as a direct replacement for LCE28-B in existing circuits?

A: Yes. The LCE28A is a direct substitute for LCE28-B. Both components share identical electrical specifications (28V reverse standoff, 45.5V clamping voltage, 33A peak pulse current) and utilize the same DO-201 axial package. No circuit modifications are required for substitution.

Q: What is the primary difference between LCE28-B and LCE28A?

A: The primary difference is product status. LCE28-B is obsolete, while LCE28A is in active production. LCE28A is supplied in Cut Tape (CT) packaging and meets ROHS3 compliance, compared to the LCE28-B's RoHS Compliant status. All electrical and thermal parameters are identical.

Q: Are there any package compatibility concerns when substituting LCE28A for LCE28-B?

A: No. Both components use the DO-201AA/DO-27 axial package configuration. The physical dimensions and lead spacing are identical, ensuring direct board-level compatibility without mechanical modification.

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

A: Substitution eligibility is determined by four critical parameters: Voltage - Reverse Standoff (28V), Voltage - Clamping (Max) @ Ipp (45.5V), Current - Peak Pulse (33A), and Operating Temperature Range (-55°C to 175°C). All substitute parts must match these specifications exactly.

Q: Is LCE28A suitable for telecom applications like the original LCE28-B?

A: Yes. LCE28A is rated for general-purpose applications and maintains all electrical specifications required for telecom transient voltage suppression. The identical clamping voltage and peak pulse current ensure equivalent performance in telecom circuit protection.

Q: What is the moisture sensitivity level for LCE28A?

A: LCE28A has a Moisture Sensitivity Level (MSL) of 1 (Unlimited), identical to LCE28-B. This indicates minimal moisture sensitivity and no special storage or handling requirements.

Q: Are there regulatory or compliance differences between LCE28-B and LCE28A?

A: Both components are RoHS compliant and share identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. LCE28A meets the more recent ROHS3 standard and carries REACH Unaffected status, providing enhanced regulatory assurance for international applications.