LCE20-B Equivalent & Substitute Parts

Part Overview

The LCE20-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 20V reverse standoff voltage with a 32.4V maximum clamping voltage and 46A peak pulse current capability in a DO-201 axial package format.

The LCE20-B carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing system maintenance and repairs where this component is specified.

Substiute Parts

LCE20-B

Littelfuse Inc.In Stock: 952LCE20-B Datasheet

Current PartRFQ

LCE20A

Littelfuse Inc.In Stock: 1615LCE20A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LCE20-B is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Clamping (Max) @ Ipp: 32.4V
• Current - Peak Pulse (10/1000µs): 46A
• Power - Peak Pulse: 1500W
• Package / Case: DO-201AA, DO-27, Axial
• Type: Zener, Unidirectional (1 channel)
• Operating Temperature Range: -55°C to 175°C (TJ)

The LCE20A is a direct electrical and mechanical equivalent to the LCE20-B. Both components share identical electrical specifications and package format. The primary distinction is product status: LCE20A is active, whereas LCE20-B is obsolete. The LCE20A is supplied in Cut Tape (CT) packaging, whereas the LCE20-B packaging format is not specified in the provided data.

Parameter Comparison

Engineering Selection Recommendations

LCE20A as Primary Substitute:

The LCE20A is the direct equivalent replacement for the LCE20-B. All electrical parameters, thermal specifications, and mechanical package dimensions are identical. The LCE20A maintains active product status with Littelfuse Inc., ensuring ongoing availability and manufacturing support.

The LCE20A carries ROHS3 compliance, which supersedes the RoHS compliance designation of the LCE20-B. Both components are classified as REACH Unaffected and carry identical export control classifications (EAR99).

Compliance Considerations:

Both the LCE20-B and LCE20A are RoHS-compliant devices with unlimited moisture sensitivity rating (MSL 1). The LCE20A's ROHS3 status reflects current regulatory alignment and is suitable for applications requiring the most current environmental compliance certifications.

Packaging and Availability:

The LCE20A is supplied in Cut Tape (CT) packaging format, which is standard for active production components. The LCE20-B packaging format is not specified in the provided data. Both components use the DO-201 supplier device package, ensuring mechanical and electrical compatibility in through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can the LCE20A be used as a direct replacement for the LCE20-B in existing designs?

A: Yes. The LCE20A is electrically and mechanically equivalent to the LCE20-B. All voltage ratings, current specifications, temperature operating range, and package format are identical. The LCE20A is the recommended substitute for the obsolete LCE20-B.

Q: What is the difference between the LCE20-B and LCE20A?

A: The primary difference is product status. The LCE20-B is obsolete, while the LCE20A is active. The LCE20A carries ROHS3 compliance versus RoHS compliance for the LCE20-B. All electrical and thermal specifications are identical.

Q: Are there any package compatibility issues when substituting LCE20A for LCE20-B?

A: No. Both components use the DO-201AA, DO-27 axial package format. The LCE20A is supplied in Cut Tape (CT) packaging, which is standard for active components and suitable for automated assembly processes.

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

A: Substitution is determined by matching the following parameters: 20V reverse standoff voltage, 22.2V minimum breakdown voltage, 32.4V maximum clamping voltage at peak pulse current, 46A peak pulse current (10/1000µs), 1500W peak pulse power, and -55°C to 175°C operating temperature range.

Q: Is the LCE20A suitable for telecom applications?

A: The LCE20A is classified for general purpose applications. The LCE20-B was specified for telecom applications. Both components share identical electrical specifications and can function in equivalent circuit protection roles. Application suitability depends on specific circuit requirements and system design parameters.

Q: What is the moisture sensitivity level (MSL) for the LCE20A?

A: The LCE20A has an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. The component can be stored and handled without special humidity control measures.

Q: Are both the LCE20-B and LCE20A RoHS compliant?

A: Yes. The LCE20-B is RoHS Compliant. The LCE20A is ROHS3 Compliant, which represents the current regulatory standard. Both designations indicate compliance with Restriction of Hazardous Substances regulations.