LSR05-TP Equivalent & Substitute Parts

Part Overview

The LSR05-TP is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 5V reverse standoff voltage with an 18V maximum clamping voltage and 5A peak pulse current rating in an SOT-143 package. The device is Active in product status and RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this TVS diode category.

Substiute Parts

LSR05-TP

Micro Commercial CoIn Stock: 786LSR05-TP Datasheet

Current PartRFQ

CM1213A-02SR

onsemiIn Stock: 48351CM1213A-02SR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LSR05-TP are evaluated based on the following critical parameters that determine functional equivalence:

• Package Compatibility: SOT-143 surface-mount package required for mechanical interchangeability
• Unidirectional Channel Configuration: 2-channel steering diode topology
• Voltage Rating Range: Reverse standoff voltage and clamping voltage within acceptable operating margins
• Current Handling Capacity: Peak pulse current rating sufficient for circuit protection requirements
• Compliance Standards: RoHS3 compliance and active product status

The CM1213A-02SR is identified as a substitute based on matching package type (SOT-143), unidirectional 2-channel configuration, surface-mount technology, and RoHS3 compliance. However, this substitute operates at a lower voltage class (3.3V reverse standoff vs. 5V) and reduced current capacity (1A vs. 5A), making it suitable only for circuits with lower voltage and current protection requirements.

Parameter Comparison

Engineering Selection Recommendations

LSR05-TP is the primary selection for applications requiring 5V reverse standoff voltage protection with 5A peak pulse current capacity and 18V clamping voltage. This device maintains active product status and full RoHS3 compliance with extended operating temperature range (-55°C to 125°C).

CM1213A-02SR serves as a substitute only in applications with reduced voltage and current requirements (3.3V standoff, 1A peak pulse, 10V clamping). This substitute maintains RoHS3 compliance and active product status but operates within a narrower temperature range (-40°C to 85°C). Direct substitution is not recommended for circuits designed for the LSR05-TP specifications.

Both devices share identical package geometry (SOT-143) and 2-channel unidirectional configuration, enabling mechanical interchangeability at the board level. Selection between these parts must be based on circuit voltage and current protection requirements.

Frequently Asked Questions (FAQ)

Q: Can CM1213A-02SR replace LSR05-TP in existing designs?

A: No. The CM1213A-02SR operates at lower voltage (3.3V vs. 5V standoff) and current (1A vs. 5A) ratings. Direct substitution will result in inadequate overvoltage protection for circuits designed for LSR05-TP specifications.

Q: Are both parts mechanically compatible?

A: Yes. Both devices use SOT-143 surface-mount packages with identical pinout configurations, allowing board-level interchangeability. However, electrical performance differences must be verified against circuit requirements before substitution.

Q: What is the temperature operating range difference?

A: LSR05-TP operates from -55°C to 125°C (junction temperature), while CM1213A-02SR operates from -40°C to 85°C (ambient temperature). Applications requiring extended low-temperature operation must use LSR05-TP.

Q: Do both parts meet RoHS3 compliance?

A: Yes. Both LSR05-TP and CM1213A-02SR are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What determines whether a substitute is acceptable?

A: Substitution acceptability is determined by matching or exceeding the original part's voltage ratings, current capacity, package type, and operating temperature range. The CM1213A-02SR does not meet these criteria for direct replacement of LSR05-TP.