CD214A-T22CALF Equivalent & Substitute Parts

Part Overview

The CD214A-T22CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 22V reverse standoff voltage with a 35.5V maximum clamping voltage and 11.2A peak pulse current capability in a DO-214AC (SMA) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214A-T22CALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	22V
Voltage - Breakdown (Min)	24.4V
Voltage - Clamping (Max) @ Ipp	35.5V
Current - Peak Pulse (10/1000µs)	11.2A
Power - Peak Pulse	400W
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the CD214A-T22CALF is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 22V
Voltage - Breakdown (Min): 24.4V
Voltage - Clamping (Max) @ Ipp: 35.5V
Current - Peak Pulse (10/1000µs): 11.2A minimum
Package / Case: DO-214AC (SMA)
Mounting Type: Surface Mount
Type: Zener, Bidirectional

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical electrical specifications (22V standoff, 35.5V clamping, 11.2A–11.3A peak pulse current) in the same DO-214AC package. These provide pin-for-pin and functional compatibility.

Similar Alternatives: Parts with the same 22V standoff voltage and DO-214AC package but different clamping voltage or peak pulse current ratings. These may be suitable depending on circuit requirements but require design verification.

Parameter Comparison

Parameter	CD214A-T22CALF (Bourns)	SMAJ22CA (MDD)	SMAJ22CA-TP (Micro Commercial Co)	SM4T26CAY (STMicroelectronics)
Voltage - Reverse Standoff (Typ)	22V	22V	22V	22V
Voltage - Breakdown (Min)	24.4V	24.4V	24.4V	24.4V
Voltage - Clamping (Max) @ Ipp	35.5V	35.5V	35.5V	48.3V
Current - Peak Pulse (10/1000µs)	11.2A	11.3A	11.2A	48A (8/20µs)
Power - Peak Pulse	400W	400W	400W	400W
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Operating Temperature	-55°C ~ 150°C (TJ)	-50°C ~ 150°C (TJ)	-55°C ~ 175°C (TA)	-55°C ~ 150°C (TJ)
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Recommended for Drop-In Replacement)

SMAJ22CA (MDD) and SMAJ22CA-TP (Micro Commercial Co) are direct functional equivalents with matching 22V standoff, 35.5V clamping voltage, and 11.2A–11.3A peak pulse current ratings. Both are active products with ROHS3 compliance. SMAJ22CA-TP offers an extended operating temperature range to 175°C (TA) compared to the original 150°C (TJ), providing additional thermal margin. Both are available in DO-214AC (SMA) packages suitable for surface-mount assembly.

Similar Alternative (Design Verification Required)

SM4T26CAY (STMicroelectronics) maintains the 22V standoff voltage and DO-214AC package but features a higher clamping voltage (48.3V) and significantly higher peak pulse current (48A at 8/20µs). This part is qualified to AEC-Q101 automotive standards and carries ROHS3 compliance. Selection of this part requires verification that the higher clamping voltage is acceptable for the protected circuit.

Frequently Asked Questions (FAQ)

Q: Can SMAJ22CA be used as a direct replacement for CD214A-T22CALF?

A: Yes. SMAJ22CA matches the critical electrical parameters: 22V reverse standoff voltage, 35.5V clamping voltage, and 11.3A peak pulse current. Both are packaged in DO-214AC (SMA) for surface-mount applications. The part is active and ROHS3 compliant.

Q: What is the difference between SMAJ22CA and SMAJ22CA-TP?

A: Both parts have identical electrical specifications (22V standoff, 35.5V clamping, 11.2A peak pulse). SMAJ22CA-TP is supplied in Tape & Reel packaging and supports an extended operating temperature range to 175°C (TA) versus the standard 150°C. Selection depends on packaging requirements and thermal operating conditions.

Q: Why does SM4T26CAY have a higher clamping voltage (48.3V) than the original part?

A: SM4T26CAY is a similar alternative with the same 22V standoff voltage but different transient response characteristics. The higher clamping voltage (48.3V) and peak pulse current (48A) indicate different protection performance. This part is suitable only if the circuit design permits the higher clamping voltage.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SMAJ22CA, SMAJ22CA-TP, and SM4T26CAY) are ROHS3 compliant, matching the compliance status of the original CD214A-T22CALF.

Q: What is the package compatibility for these TVS diodes?

A: All parts use the DO-214AC (SMA) surface-mount package. This ensures mechanical and electrical compatibility on existing PCB layouts designed for the CD214A-T22CALF.

Q: Is SM4T26CAY suitable for automotive applications?

A: SM4T26CAY is qualified to AEC-Q101 automotive standards. The original CD214A-T22CALF and other direct equivalents do not carry automotive qualification. Selection of SM4T26CAY for automotive use requires design verification of the higher clamping voltage.

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