SMDA12CDR2G Equivalent & Substitute Parts

Part Overview

The SMDA12CDR2G is a bidirectional transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 12V reverse standoff voltage with 24V clamping capability and 12A peak pulse current rating in an 8-SOIC package. The part is currently classified as obsolete, making identification of suitable equivalent and substitute components essential for ongoing design support and procurement.

Substiute Parts

SMDA12CDR2G

onsemiIn Stock: 3930SMDA12CDR2G Datasheet

Current PartRFQ

SMDA12C.TBT

Semtech CorporationIn Stock: 1862SMDA12C.TBT Datasheet

DirectRFQ

SMDA12C

SMC Diode SolutionsIn Stock: 6213SMDA12C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMDA12CDR2G is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Bidirectional channels: 4
• Voltage - Reverse Standoff (Typ): 12V (Max)
• Voltage - Breakdown (Min): 13.3V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)

Secondary Compatibility Factors:

• Voltage - Clamping (Max) @ Ipp: 24V nominal
• Current - Peak Pulse: 12A (8/20µs)
• Power - Peak Pulse: 300W
• Capacitance @ Frequency: 120pF @ 1MHz
• Operating Temperature Range: -55°C ~ 150°C (TJ)

Substitute parts are classified as direct or similar based on alignment with these parameters. Direct substitutes maintain all critical electrical specifications. Similar substitutes may vary in secondary parameters such as clamping voltage or operating temperature range while maintaining core protection characteristics.

Parameter Comparison

Engineering Selection Recommendations

SMDA12C.TBT (Direct Substitute - Recommended)

The SMDA12C.TBT from Semtech Corporation is a direct electrical equivalent to the SMDA12CDR2G. This part maintains identical specifications for reverse standoff voltage (12V), breakdown voltage (13.3V), clamping voltage (24V), peak pulse current (12A), and power dissipation (300W). The component is currently in active production status, ensuring long-term availability and supply chain stability. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) match the original specification. The operating temperature range is reduced to -55°C ~ 125°C compared to the original -55°C ~ 150°C; this difference should be evaluated against specific application requirements. Available in Cut Tape and Digi-Reel packaging options.

SMDA12C (Similar Substitute - Conditional)

The SMDA12C from SMC Diode Solutions maintains core protection characteristics with identical reverse standoff voltage (12V), breakdown voltage (13.3V), and power dissipation (300W). This part differs in clamping voltage specification (19V versus 24V) and capacitance (94pF versus 120pF). Peak pulse current is not specified for this variant. The component is in active production with ROHS3 compliance. Operating temperature range is -55°C ~ 125°C. REACH status is listed as affected, requiring compliance verification for specific applications. This substitute is suitable only where the lower clamping voltage (19V) is acceptable for the application circuit.

Frequently Asked Questions (FAQ)

Q: Can SMDA12C.TBT be used as a direct replacement for SMDA12CDR2G?

A: Yes. The SMDA12C.TBT maintains all critical electrical parameters including reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and power dissipation. The primary consideration is the reduced operating temperature range (-55°C ~ 125°C versus -55°C ~ 150°C). Verify that your application does not require operation above 125°C junction temperature.

Q: What is the difference between SMDA12C.TBT and SMDA12C?

A: Both parts share the same reverse standoff voltage (12V) and breakdown voltage (13.3V). The key difference is clamping voltage: SMDA12C.TBT clamps at 24V (matching the original), while SMDA12C clamps at 19V. Additionally, SMDA12C.TBT specifies peak pulse current at 12A, while SMDA12C does not provide this specification. SMDA12C also has REACH status listed as affected.

Q: Are all substitute parts compatible with the original 8-SOIC package footprint?

A: Yes. All listed substitutes use the 8-SOIC package with 0.154" (3.90mm) width, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the SMDA12CDR2G.

Q: Why is the SMDA12CDR2G classified as obsolete?

A: The original part is no longer manufactured by onsemi. Active equivalent parts from other manufacturers (Semtech Corporation and SMC Diode Solutions) are available to support ongoing designs and replacements.

Q: Does the reduced operating temperature range of substitute parts affect my application?

A: The substitute parts operate to -55°C ~ 125°C (TJ) versus the original -55°C ~ 150°C (TJ). If your application requires junction temperatures above 125°C, the substitutes may not be suitable. Evaluate your thermal design and maximum expected junction temperature under worst-case conditions.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both SMDA12C.TBT and SMDA12C are ROHS3 compliant, matching the compliance status of the original SMDA12CDR2G.

Q: What packaging options are available for the substitute parts?

A: SMDA12C.TBT is available in Cut Tape (CT) and Digi-Reel packaging. SMDA12C is available in Tape & Reel (TR) packaging. Confirm packaging availability with your supplier based on procurement requirements.