CM1215-02SO Equivalent & Substitute Parts

Part Overview

The CM1215-02SO is a steering TVS diode manufactured by onsemi, designed for transient voltage suppression in surface mount applications. This component features a 4.8V typical clamping voltage and 1A peak pulse current rating in a SOT-23-5 package. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and component procurement.

Substiute Parts

CM1215-02SO

onsemiIn Stock: 6183CM1215-02SO Datasheet

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CM1293A-02SO

onsemiIn Stock: 33468CM1293A-02SO Datasheet

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D1213A-02SM-7

Diodes IncorporatedIn Stock: 24279D1213A-02SM-7 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CM1215-02SO is determined by the following critical parameters:

Primary Substitution Criteria:

• Steering TVS diode topology (Rail to Rail configuration)
• Dual unidirectional channels (2 channels)
• Peak pulse current rating: 1A (8/20µs)
• Surface mount packaging compatibility
• Operating temperature range requirements

Secondary Compatibility Factors:

• Voltage clamping characteristics within acceptable system tolerance
• Reverse standoff voltage alignment with circuit protection requirements
• Moisture sensitivity level and reliability certifications
• RoHS and REACH compliance status

The CM1215-02SO has been identified with two substitute parts: CM1293A-02SO (onsemi) and D1213A-02SM-7 (Diodes Incorporated). Both maintain the core steering TVS architecture and 1A peak pulse specification, though with different clamping voltage profiles and package configurations.

Parameter Comparison

Engineering Selection Recommendations

D1213A-02SM-7 (Diodes Incorporated) is the preferred substitute for new designs and ongoing procurement. This part maintains active product status, carries AEC-Q101 automotive qualification, and provides the widest operating temperature range (-65°C ~ 150°C). The D1213A-02SM-7 offers extended design flexibility and supply chain continuity. Package compatibility with the original CM1215-02SO (SC-74A, SOT-753) ensures direct PCB layout compatibility.

CM1293A-02SO (onsemi) serves as a secondary alternative within the onsemi product family. This part is designated Last Time Buy status, indicating limited future availability. The CM1293A-02SO operates within a narrower temperature range (-40°C ~ 85°C) and uses a different package variant (SC-74, SOT-457), requiring PCB layout verification before implementation.

Both substitutes maintain the critical steering TVS topology, dual-channel configuration, and 1A peak pulse current specification. Selection between alternatives depends on temperature operating requirements, supply chain strategy, and PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the CM1293A-02SO directly replace the CM1215-02SO on existing PCBs?

A: Package compatibility must be verified. The CM1215-02SO uses SC-74A (SOT-753) packaging, while the CM1293A-02SO uses SC-74 (SOT-457). Although both are surface mount variants, pinout and footprint differences may require PCB layout modification. Consult package datasheets for dimensional specifications.

Q: What is the primary difference in clamping voltage between these parts?

A: The CM1215-02SO specifies 4.8V typical clamping voltage, while both CM1293A-02SO and D1213A-02SM-7 specify higher clamping voltages (9.9V and 10V respectively). This difference affects transient suppression characteristics and must be evaluated against circuit protection requirements.

Q: Is the D1213A-02SM-7 suitable for automotive applications?

A: Yes. The D1213A-02SM-7 carries AEC-Q101 qualification and automotive-grade designation, making it suitable for automotive circuit protection applications. The CM1215-02SO and CM1293A-02SO lack automotive qualification.

Q: What is the significance of "Last Time Buy" status for the CM1293A-02SO?

A: Last Time Buy status indicates that onsemi has announced end-of-life for this product. Existing inventory will be sold until depletion, after which the part will no longer be available. For long-term designs, the active D1213A-02SM-7 is the recommended choice.

Q: Are all three parts RoHS compliant?

A: The CM1215-02SO does not specify RoHS status in available documentation. Both CM1293A-02SO and D1213A-02SM-7 are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: Can these parts be used interchangeably in terms of moisture sensitivity?

A: Yes. All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.