CSL05D TR Equivalent & Substitute Parts

Part Overview

The CSL05D TR is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Central Semiconductor Corp, designed for surface mount applications in the SOT-23 package. This component provides transient overvoltage protection with a 5V reverse standoff voltage and 12V clamping voltage at peak pulse current. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support, maintenance, and new production requirements where equivalent protection characteristics are needed.

Substiute Parts

CSL05D TR

Central Semiconductor CorpIn Stock: 732CSL05D TR Datasheet

Current PartRFQ

SM05T1G

onsemiIn Stock: 85226SM05T1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete CSL05D TR is determined by the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage: 5V nominal specification
• Breakdown Voltage (Min): 6V minimum threshold
• Clamping Voltage: Maximum allowable voltage at peak pulse current
• Peak Pulse Current: 17A at 8/20µs pulse duration
• Package Compatibility: SOT-23-3 / TO-236-3 surface mount form factor
• Operating Temperature Range: Functional temperature limits
• Bidirectional/Unidirectional Configuration: Channel architecture for protection topology

The SM05T1G from onsemi meets the core electrical requirements for reverse standoff voltage (5V), breakdown voltage (6.2V minimum), peak pulse current (17A at 8/20µs), and package form factor (SOT-23-3). While the clamping voltage specification differs (9.8V versus 12V), this represents a tighter clamping characteristic suitable for equivalent overvoltage suppression in the 5V protection class.

Parameter Comparison

Engineering Selection Recommendations

The SM05T1G is the primary substitute for the obsolete CSL05D TR based on the following factors:

Product Status: The SM05T1G maintains active production status with onsemi, ensuring long-term availability and supply chain continuity compared to the obsolete CSL05D TR.

Regulatory Compliance: The SM05T1G carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for new designs and production.

Electrical Compatibility: Both devices share identical reverse standoff voltage (5V), peak pulse current (17A at 8/20µs), and package form factor (SOT-23-3). The SM05T1G provides a tighter clamping voltage specification (9.8V versus 12V), which represents improved transient suppression performance within the 5V protection class.

Temperature Performance: The SM05T1G extends the operating temperature range to -55°C ~ 150°C, providing broader thermal operating margins compared to the CSL05D TR specification of -50°C ~ 125°C.

Mechanical Compatibility: Both components use identical SOT-23-3 surface mount packaging, enabling direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the SM05T1G directly replace the CSL05D TR without circuit modification?

A: Yes, the SM05T1G is mechanically and electrically compatible for direct substitution. Both devices share the same SOT-23-3 package footprint, reverse standoff voltage (5V), and peak pulse current rating (17A at 8/20µs). The tighter clamping voltage of the SM05T1G (9.8V versus 12V) provides equivalent or improved overvoltage suppression performance.

Q: What is the significance of the clamping voltage difference between the two parts?

A: The clamping voltage determines the maximum voltage that appears across the TVS diode during a transient event. The SM05T1G's 9.8V clamping voltage is lower than the CSL05D TR's 12V specification, meaning it suppresses transients to a lower peak voltage. This represents improved protection characteristics for 5V logic and analog circuits.

Q: Are there any temperature range considerations for substitution?

A: The SM05T1G operates across a wider temperature range (-55°C ~ 150°C) compared to the CSL05D TR (-50°C ~ 125°C). This extended range provides additional thermal margin and is suitable for applications requiring broader operating temperature specifications.

Q: Does the SM05T1G meet current regulatory requirements?

A: Yes, the SM05T1G is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components. The CSL05D TR regulatory status is not specified.

Q: Is the peak pulse power rating difference significant?

A: The SM05T1G specifies 300W peak pulse power compared to the CSL05D TR's 400W. For applications where the CSL05D TR was operating near its 400W limit, thermal analysis of the specific transient profile is necessary to confirm the SM05T1G's suitability.

Q: What packaging formats are available for the SM05T1G?

A: The SM05T1G is supplied in Cut Tape (CT) and Digi-Reel packaging formats, supporting both manual assembly and automated production environments.