CD214A-T26ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T26ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 26V reverse standoff voltage with a 42.1V maximum clamping voltage at peak pulse current. Housed in a DO-214AC (SMA) surface mount package, this component is designed for general-purpose transient voltage suppression applications. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214A-T26ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	26V
Voltage - Breakdown (Min)	28.9V
Voltage - Clamping (Max) @ Ipp	42.1V
Current - Peak Pulse (10/1000µs)	9.5A
Power - Peak Pulse	400W
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AC, SMA
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CD214A-T26ALF is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 26V nominal
Voltage - Clamping (Max) @ Ipp: 42.1V maximum
Current - Peak Pulse (10/1000µs): 9.5A minimum
Power - Peak Pulse: 400W minimum
Package / Case: DO-214AC (SMA) surface mount
Type: Unidirectional Zener TVS diode
Operating Temperature Range: -55°C to 150°C minimum

Substitute parts are classified into two categories:

Direct Equivalents: Parts with identical electrical specifications (26V standoff, 42.1V clamping, 9.5A peak pulse current) and active product status.

Similar Alternatives: Parts with comparable voltage ratings and clamping characteristics within acceptable tolerance bands, offering enhanced specifications (higher peak pulse current or power dissipation) or alternative sourcing options. These parts maintain functional compatibility while providing design flexibility.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status	Package
CD214A-T26ALF	Bourns Inc.	26V	28.9V	42.1V	9.5A	400W	-55°C ~ 150°C	Obsolete	DO-214AC (SMA)
SMAJ26A	Meritek	26V	28.9V	42.1V	9.5A	400W	-55°C ~ 150°C	Active	DO-214AC (SMA)
P4SMA30A-M3/5A	Vishay General Semiconductor - Diodes Division	25.6V	28.5V	41.4V	9.7A	400W	-65°C ~ 150°C	Active	DO-214AC (SMA)
P4SMA30A-M3/61	Vishay General Semiconductor - Diodes Division	25.6V	28.5V	41.4V	9.7A	400W	-65°C ~ 150°C	Active	DO-214AC (SMA)
P4SMA33A-M3/5A	Vishay General Semiconductor - Diodes Division	28.2V	31.4V	45.7V	8.8A	400W	-65°C ~ 150°C	Active	DO-214AC (SMA)
P4SMA33A-M3/61	Vishay General Semiconductor - Diodes Division	28.2V	31.4V	45.7V	8.8A	400W	-65°C ~ 150°C	Active	DO-214AC (SMA)
SM4T30AY	STMicroelectronics	26V	28.9V	54.6V	43A (8/20µs)	400W	-55°C ~ 150°C	Active	DO-214AC (SMA)
SMA5J26A-M3/5A	Vishay General Semiconductor - Diodes Division	26V	28.9V	42.1V	11.9A	500W	-55°C ~ 150°C	Active	DO-214AC (SMA)
SMA5J26A-M3/61	Vishay General Semiconductor - Diodes Division	26V	28.9V	42.1V	11.9A	500W	-55°C ~ 150°C	Active	DO-214AC (SMA)
SMA5J30A-M3/5A	Vishay General Semiconductor - Diodes Division	30V	33.3V	48.4V	10.3A	500W	-55°C ~ 150°C	Active	DO-214AC (SMA)

Engineering Selection Recommendations

Direct Replacement (Preferred)

SMAJ26A (Meritek) provides a direct electrical and mechanical equivalent to the CD214A-T26ALF with active product status. This part maintains identical voltage ratings (26V standoff, 42.1V clamping), peak pulse current (9.5A), power dissipation (400W), operating temperature range (-55°C to 150°C), and DO-214AC (SMA) package configuration. ROHS3 compliance and MSL 1 rating match the original specification. This is the primary recommendation for direct substitution.

Enhanced Performance Alternatives

SMA5J26A-M3/5A and SMA5J26A-M3/61 (Vishay) offer identical voltage and clamping specifications to the original part while providing increased peak pulse current (11.9A) and power dissipation (500W). These parts are suitable for applications requiring higher transient energy absorption capability within the same voltage class. Both are active products with ROHS3 compliance and MSL 1 rating.

Voltage Class Alternatives

P4SMA30A-M3/5A and P4SMA30A-M3/61 (Vishay) operate at 25.6V standoff with 41.4V clamping, representing a lower voltage class suitable for applications with reduced voltage stress requirements. These parts offer extended operating temperature range (-65°C to 150°C) and are active products with full compliance certifications.

P4SMA33A-M3/5A and P4SMA33A-M3/61 (Vishay) operate at 28.2V standoff with 45.7V clamping, representing a higher voltage class for applications requiring greater voltage margin. These parts also feature extended temperature range and active product status.

High-Current Alternative

SM4T30AY (STMicroelectronics) maintains the 26V standoff and 28.9V breakdown voltage of the original part but provides significantly enhanced peak pulse current (43A at 8/20µs) and clamping voltage (54.6V). This part is qualified to AEC-Q101 automotive standard and is suitable for high-energy transient suppression applications. The different pulse waveform specification (8/20µs versus 10/1000µs) reflects automotive-grade performance characteristics.

All recommended substitutes maintain DO-214AC (SMA) surface mount packaging, ROHS3 compliance, and MSL 1 moisture sensitivity rating, ensuring direct PCB compatibility and manufacturing process compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can SMAJ26A be used as a direct replacement for CD214A-T26ALF?

A: Yes. SMAJ26A provides identical electrical specifications (26V standoff, 42.1V clamping, 9.5A peak pulse current, 400W power dissipation) and package configuration (DO-214AC SMA). The part is active and carries ROHS3 compliance and MSL 1 rating matching the original specification.

Q: What is the difference between SMA5J26A and SMAJ26A?

A: SMA5J26A provides enhanced specifications compared to SMAJ26A: peak pulse current increases from 9.5A to 11.9A, and power dissipation increases from 400W to 500W. Both maintain identical voltage ratings (26V standoff, 42.1V clamping) and DO-214AC (SMA) packaging. SMA5J26A is suitable for applications requiring higher transient energy absorption.

Q: Can P4SMA30A-M3/5A replace CD214A-T26ALF?

A: P4SMA30A-M3/5A operates at a lower voltage class (25.6V standoff versus 26V) with slightly lower clamping voltage (41.4V versus 42.1V). The part is functionally compatible for applications where the lower voltage rating is acceptable. Peak pulse current (9.7A) and power dissipation (400W) are comparable. Extended operating temperature range (-65°C to 150°C) provides additional margin.

Q: What is the significance of the different peak pulse current specifications (10/1000µs versus 8/20µs)?

A: The pulse waveform specification defines the test conditions under which peak pulse current is measured. 10/1000µs represents standard industrial TVS diode testing, while 8/20µs represents automotive-grade testing. SM4T30AY, specified at 8/20µs with 43A peak pulse current, is qualified to automotive standards and provides significantly higher transient suppression capability than the original 9.5A specification at 10/1000µs.

Q: Are all substitute parts compatible with the original PCB layout?

A: Yes. All substitute parts use DO-214AC (SMA) surface mount packaging, which maintains identical footprint and pin configuration. Direct PCB compatibility is assured without layout modifications.

Q: What compliance certifications should I verify for substitute parts?

A: All recommended substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original CD214A-T26ALF specification. SM4T30AY additionally carries AEC-Q101 automotive qualification. Verify REACH status and ECCN classification (EAR99) for your specific supply chain requirements.

Q: Can I use P4SMA33A-M3/5A in place of CD214A-T26ALF?

A: P4SMA33A-M3/5A operates at a higher voltage class (28.2V standoff versus 26V) with higher clamping voltage (45.7V versus 42.1V). This part is suitable only for applications where the higher voltage rating does not conflict with circuit design requirements. Peak pulse current is slightly lower (8.8A versus 9.5A). Extended operating temperature range (-65°C to 150°C) is provided.

Q: Which substitute offers the best performance upgrade?

A: SMA5J26A-M3/5A and SMA5J26A-M3/61 provide the most direct performance upgrade, maintaining identical voltage specifications while increasing peak pulse current from 9.5A to 11.9A and power dissipation from 400W to 500W. For applications requiring extreme transient suppression capability, SM4T30AY offers 43A peak pulse current at the cost of higher clamping voltage (54.6V).

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