CD214C-T22ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T22ALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This unidirectional Zener diode features a 22V reverse standoff voltage with a 35.5V maximum clamping voltage and 42.2A peak pulse current capability in a DO-214AB (SMC) package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214C-T22ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener, Unidirectional
Voltage - Reverse Standoff (Typ)	22V
Voltage - Breakdown (Min)	24.4V
Voltage - Clamping (Max) @ Ipp	35.5V
Current - Peak Pulse (10/1000µs)	42.2A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Operating Temperature	-55°C ~ 150°C (TJ)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CD214C-T22ALF are classified based on electrical and mechanical compatibility within the following criteria:

Direct Substitutes maintain identical electrical performance: 22V reverse standoff voltage, 24.4V minimum breakdown voltage, 35.5V maximum clamping voltage, 42.2–42.3A peak pulse current, 1500W peak pulse power, and DO-214AB (SMC) package configuration.

Upgrade Substitutes provide enhanced specifications while maintaining core voltage parameters and package compatibility. These parts offer improved temperature range, automotive-grade qualification, or active product status for long-term availability.

Similar Substitutes share the same voltage ratings and package but differ in peak pulse current and power dissipation capabilities. These parts are suitable when higher transient energy absorption is required or when specific manufacturer certifications are needed.

All substitute relationships are based strictly on the following allowed parameters:

Voltage - Reverse Standoff: 22V
Voltage - Breakdown (Min): 24.4V
Voltage - Clamping (Max) @ Ipp: 35.5V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Type: Zener, Unidirectional

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max)	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status	Package
CD214C-T22ALF	Bourns Inc.	22V	24.4V	35.5V	42.2A	1500W	-55°C ~ 150°C	Obsolete	DO-214AB, SMC
SMCJ22A	Fairchild Semiconductor	22V	24.4V	35.5V	42.3A	1500W	-55°C ~ 150°C	Active	DO-214AB, SMC
SZ1SMC22AT3G	Littelfuse Inc.	22V	24.4V	35.5V	42.2A	1500W	-65°C ~ 150°C	Active	DO-214AB, SMC
5.0SMDJ22A-T7	Littelfuse Inc.	22V	24.4V	35.5V	141A	5000W	-65°C ~ 150°C	Active	DO-214AB, SMC
5.0SMDJ22A	Taiwan Semiconductor Corporation	22V	24.4V	35.5V	141A	5000W	-55°C ~ 175°C	Active	DO-214AB, SMC
SMCJ22A-13-F	Diodes Incorporated	22V	24.4V	35.5V	42.2A	1500W	-55°C ~ 150°C	Active	DO-214AB, SMC
SMCJ22A-HR	Littelfuse Inc.	22V	24.4V	35.5V	42.3A	1500W	-65°C ~ 150°C	Active	DO-214AB, SMC
SMCJ22A-TR	STMicroelectronics	22V	24.4V	48.3V	207A (8/20µs)	1500W	-55°C ~ 150°C	Active	DO-214AB, SMC
SMDJ22A	Alpha & Omega Semiconductor Inc.	22V	24.4V	35.5V	84.6A	3000W	-55°C ~ 150°C	Active	DO-214AB, SMC

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance): SMCJ22A (Fairchild Semiconductor) and SMCJ22A-13-F (Diodes Incorporated) are direct electrical equivalents with active product status, ensuring long-term availability and supply chain continuity. Both maintain the original 42.2–42.3A peak pulse current and 1500W power rating.

Recommended Upgrade Substitute: SZ1SMC22AT3G (Littelfuse Inc.) provides an upgrade path with extended lower operating temperature limit (-65°C vs. -55°C), AEC-Q101 automotive qualification, and active product status. This part is suitable for applications requiring automotive-grade reliability or expanded temperature performance.

Higher Power Alternatives: 5.0SMDJ22A-T7 (Littelfuse Inc.) and 5.0SMDJ22A (Taiwan Semiconductor Corporation) offer 5000W peak pulse power with 141A peak pulse current, providing enhanced transient energy absorption for high-stress applications. The 5.0SMDJ22A extends the upper operating temperature to 175°C.

Extended Temperature Range: SMCJ22A-HR (Littelfuse Inc.) provides -65°C lower temperature limit while maintaining 1500W power rating and 42.3A peak pulse current, suitable for industrial or automotive environments.

Higher Current Alternative: SMDJ22A (Alpha & Omega Semiconductor Inc.) delivers 84.6A peak pulse current with 3000W power rating, appropriate for applications requiring intermediate transient current handling between standard 1500W and 5000W classes.

All recommended substitutes maintain ROHS3 compliance and are available in active product status, ensuring regulatory compliance and procurement reliability.

Frequently Asked Questions (FAQ)

Q: Can SMCJ22A directly replace CD214C-T22ALF? A: Yes. SMCJ22A is a direct electrical equivalent with identical voltage ratings (22V standoff, 24.4V breakdown, 35.5V clamping), peak pulse current (42.3A), power rating (1500W), and DO-214AB package. Active product status from Fairchild Semiconductor ensures availability.

Q: What is the difference between direct substitutes and similar substitutes? A: Direct substitutes maintain identical peak pulse current (42.2–42.3A) and power rating (1500W). Similar substitutes share voltage parameters and package but offer higher peak pulse current (84.6A–207A) and power dissipation (3000W–5000W), suitable for applications requiring greater transient energy absorption.

Q: Is SZ1SMC22AT3G suitable for automotive applications? A: Yes. SZ1SMC22AT3G carries AEC-Q101 automotive qualification and extends the lower operating temperature to -65°C, making it appropriate for automotive-grade designs requiring enhanced reliability and temperature performance.

Q: Can I use 5.0SMDJ22A-T7 as a drop-in replacement? A: Electrically, yes, as it maintains the same voltage ratings and DO-214AB package. However, the significantly higher peak pulse current (141A) and power rating (5000W) mean it is oversized for applications designed for 1500W. Use this part only when higher transient energy absorption is required.

Q: What is the difference between 5.0SMDJ22A and 5.0SMDJ22A-T7? A: Both offer identical electrical performance (141A peak pulse, 5000W power, 35.5V clamping). The primary difference is the upper operating temperature: 5.0SMDJ22A reaches 175°C, while 5.0SMDJ22A-T7 is rated to 150°C. 5.0SMDJ22A-T7 includes automotive-grade qualification.

Q: Why does SMCJ22A-TR show 48.3V clamping voltage instead of 35.5V? A: SMCJ22A-TR from STMicroelectronics is a similar substitute that maintains the same 22V standoff and 24.4V breakdown voltages but exhibits higher clamping voltage (48.3V) and significantly higher peak pulse current (207A at 8/20µs pulse). This part is suitable only when higher clamping voltage and current handling are acceptable for the application.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring regulatory compliance with current environmental standards.

Q: What packaging options are available? A: All substitute parts are available in DO-214AB (SMC) surface mount package, matching the original CD214C-T22ALF configuration. Packaging formats vary by manufacturer (Bulk, Tape & Reel), but the component package remains consistent.

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