CD214A-T12ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T12ALF is a unidirectional transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 12V reverse standoff voltage with a 19.9V maximum clamping voltage. This surface mount component in DO-214AC (SMA) package is designed for general-purpose transient protection applications. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD214A-T12ALF

Bourns Inc.In Stock: 954CD214A-T12ALF Datasheet

Current PartRFQ

SMAJ12A

Good-Ark SemiconductorIn Stock: 37033SMAJ12A Datasheet

DirectRFQ

SMAJ12A

Good-Ark SemiconductorIn Stock: 37033SMAJ12A Datasheet

DirectRFQ

SMAJ12A

Good-Ark SemiconductorIn Stock: 37033SMAJ12A Datasheet

DirectRFQ

P4SMA16A-M3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 1174P4SMA16A-M3/61 Datasheet

SimilarRFQ

SM4T14AY

STMicroelectronicsIn Stock: 935SM4T14AY Datasheet

SimilarRFQ

SMA6J12A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1208SMA6J12A-E3/5A Datasheet

SimilarRFQ

SMA6J12A-TR

STMicroelectronicsIn Stock: 10232SMA6J12A-TR Datasheet

SimilarRFQ

SMAJ12A-TP

Micro Commercial CoIn Stock: 5988SMAJ12A-TP Datasheet

SimilarRFQ

SMAJ12A-TR

STMicroelectronicsIn Stock: 17759SMAJ12A-TR Datasheet

SimilarRFQ

SMAJ14A-M3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1024SMAJ14A-M3/5A Datasheet

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SMAJP4KE16A-TP

Micro Commercial CoIn Stock: 688SMAJP4KE16A-TP Datasheet

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TV04A120J-G

Comchip TechnologyIn Stock: 1191TV04A120J-G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD214A-T12ALF is determined by the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Breakdown (Min): 13.3V
• Voltage - Clamping (Max) @ Ipp: 19.9V (primary specification)
• Current - Peak Pulse (10/1000µs): 20.1A
• Power - Peak Pulse: 400W
• Unidirectional channel configuration

Mechanical Matching Criteria:

• Package / Case: DO-214AC (SMA)
• Surface Mount technology
• Mounting compatibility with existing PCB layouts

Compliance Criteria:

• RoHS3 Compliant
• MSL 1 (Unlimited)

Substitute parts are classified into two categories:

Direct Equivalents: Parts with identical electrical specifications (12V standoff, 19.9V clamping, 20.1A peak pulse, 400W power rating) and active product status.

Similar Alternatives: Parts with the same 12V standoff voltage and DO-214AC package but with variations in clamping voltage, peak pulse current, or power rating. These require application-level verification for compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Recommended for Pin-for-Pin Replacement):

SMAJ12A (Good-Ark Semiconductor) and SMAJ12A-TP (Micro Commercial Co) are direct electrical and mechanical equivalents to the CD214A-T12ALF. Both parts feature identical 12V reverse standoff voltage, 19.9V clamping voltage, 20.1A peak pulse current, and 400W power rating in the DO-214AC (SMA) package. Both manufacturers maintain active product status and full RoHS3 compliance. These parts are suitable for direct substitution without circuit redesign.

Higher Current Capacity Alternatives:

SMA6J12A-E3/5A (Vishay) and SMA6J12A-TR (STMicroelectronics) maintain the 12V standoff and 13.3V breakdown specifications but feature elevated clamping voltage (24.6V) and significantly higher peak pulse current (157A at 8/20µs). SMA6J12A-TR offers extended operating temperature range to 175°C. These parts provide enhanced transient suppression capability and are suitable when higher energy absorption is required.

SMAJ12A-TR (STMicroelectronics) provides 12V standoff voltage with 25.3V clamping and 91A peak pulse current (8/20µs), offering intermediate performance between direct equivalents and high-current alternatives.

Higher Voltage Alternatives:

P4SMA16A-M3/61 (Vishay) and SMAJ14A-M3/5A (Vishay) feature elevated reverse standoff voltages (13.6V and 14V respectively) and are suitable only when circuit design permits higher voltage thresholds. These parts are not recommended as direct replacements for 12V standoff applications.

SM4T14AY (STMicroelectronics) maintains 12V standoff voltage but features 25.3V clamping and 91A peak pulse current with automotive-grade qualification (AEC-Q101). This part is suitable for automotive applications requiring equivalent protection characteristics.

All recommended substitute parts maintain RoHS3 compliance, MSL 1 rating, and surface mount DO-214AC (SMA) package compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMAJ12A be used as a direct replacement for CD214A-T12ALF?

A: Yes. SMAJ12A (Good-Ark Semiconductor) is a direct electrical and mechanical equivalent. It maintains identical 12V reverse standoff voltage, 19.9V clamping voltage, 20.1A peak pulse current, and 400W power rating in the same DO-214AC (SMA) package. The part is active and RoHS3 compliant.

Q: What is the difference between SMAJ12A and SMA6J12A-TR?

A: Both parts share the 12V reverse standoff voltage and 13.3V breakdown voltage. However, SMA6J12A-TR features higher clamping voltage (24.6V vs 19.9V) and significantly higher peak pulse current (157A at 8/20µs vs 20.1A at 10/1000µs). SMA6J12A-TR also offers extended operating temperature range to 175°C. Selection depends on whether the application requires the higher energy absorption capability of the SMA6J12A-TR.

Q: Are higher voltage parts like P4SMA16A-M3/61 suitable replacements?

A: No. P4SMA16A-M3/61 features 13.6V reverse standoff voltage, which exceeds the 12V specification of the CD214A-T12ALF. Using a higher voltage TVS diode will reduce protection effectiveness in 12V circuits. This part is suitable only for applications designed for 13.6V standoff voltage.

Q: What does the clamping voltage specification mean for substitution?

A: Clamping voltage is the maximum voltage across the TVS diode during transient suppression at peak pulse current. Direct equivalents maintain 19.9V clamping voltage. Higher clamping voltage alternatives (24.6V, 25.3V) allow higher transient voltages to appear across the protected circuit but provide greater current handling capacity. Selection requires verification that the protected circuit can tolerate the higher clamping voltage.

Q: Are all substitute parts available in the same DO-214AC (SMA) package?

A: Yes. All substitute parts listed are available in DO-214AC (SMA) surface mount package, ensuring mechanical and PCB layout compatibility with the original CD214A-T12ALF design.

Q: What is the significance of the 8/20µs vs 10/1000µs pulse specification?

A: These represent different test waveforms for measuring peak pulse current. The 8/20µs waveform is a faster transient pulse, while 10/1000µs is a slower pulse. Parts specified with 8/20µs current ratings (such as SMA6J12A-TR at 157A) indicate higher current handling capability under fast transient conditions. Direct equivalents use the 10/1000µs specification.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the original CD214A-T12ALF.