LCE30-B Equivalent & Substitute Parts

Part Overview

The LCE30-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 30V reverse standoff voltage with a 48.4V maximum clamping voltage and 31A peak pulse current capability in a DO-201 axial package format.

The LCE30-B carries an obsolete product status. 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

LCE30-B

Littelfuse Inc.In Stock: 1162LCE30-B Datasheet

Current PartRFQ

LCE30A

Littelfuse Inc.In Stock: 2464LCE30A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LCE30-B is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 30V
• Voltage - Breakdown (Min): 33.3V
• Voltage - Clamping (Max) @ Ipp: 48.4V
• Current - Peak Pulse (10/1000µs): 31A
• Power - Peak Pulse: 1500W
• Type: Zener
• Unidirectional Channels: 1

Mechanical Equivalence Criteria:

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

The LCE30A is a direct substitute for the LCE30-B. Both components share identical electrical specifications and package format. The primary distinction is product status: LCE30A is active and available in Tape & Reel packaging, whereas LCE30-B is obsolete. The LCE30A operates across an extended temperature range (-65°C to 175°C) and carries ROHS3 compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The LCE30A is the direct replacement for the obsolete LCE30-B. Both components are manufactured by Littelfuse Inc. and share identical electrical performance specifications and package format.

Selection Basis:

The LCE30A is recommended for new designs and production continuity due to its active product status and superior availability. The component maintains full electrical equivalence with the LCE30-B across all critical parameters: 30V reverse standoff voltage, 48.4V clamping voltage, and 31A peak pulse current.

The LCE30A provides an extended operating temperature range (-65°C to 175°C versus -55°C to 175°C), offering improved performance margin in low-temperature environments. Both components carry RoHS compliance certifications appropriate for their respective product lifecycles.

Packaging availability differs: LCE30-B is supplied in standard bulk format, while LCE30A is available in Tape & Reel configuration, supporting automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the LCE30A directly replace the LCE30-B in existing designs?

A: Yes. The LCE30A is electrically and mechanically equivalent to the LCE30-B. Both components feature identical voltage ratings (30V reverse standoff, 48.4V clamping), current ratings (31A peak pulse), and package format (DO-201 axial). No circuit modifications are required.

Q: What is the primary reason to transition from LCE30-B to LCE30A?

A: The LCE30-B is obsolete, while the LCE30A is an active product with ongoing manufacturing and supply availability. Transitioning to LCE30A ensures long-term component availability and supply chain continuity.

Q: Are there packaging differences between LCE30-B and LCE30A?

A: Both components use the same DO-201 axial package format. The primary packaging difference is distribution method: LCE30-B is supplied in bulk, while LCE30A is available in Tape & Reel format for automated assembly operations.

Q: Does the LCE30A have different temperature specifications?

A: The LCE30A operates across a wider temperature range (-65°C to 175°C) compared to the LCE30-B (-55°C to 175°C). This extended low-temperature capability provides additional performance margin without affecting electrical specifications.

Q: Are both components RoHS compliant?

A: Yes. The LCE30-B is RoHS Compliant, and the LCE30A is ROHS3 Compliant. Both meet environmental compliance requirements for their respective product generations.

Q: What applications are supported by the LCE30A?

A: The LCE30A is rated for general-purpose transient voltage suppression applications. The original LCE30-B was specified for telecom applications. The LCE30A's broader application rating encompasses telecom and other general-purpose transient protection requirements.