CD214C-T20ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T20ALF 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 20V reverse standoff voltage with 32.4V maximum clamping voltage and 46.3A peak pulse current capability in a DO-214AB (SMC) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214C-T20ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener, Unidirectional
Voltage - Reverse Standoff (Typ)	20V
Voltage - Breakdown (Min)	22.2V
Voltage - Clamping (Max) @ Ipp	32.4V
Current - Peak Pulse (10/1000µs)	46.3A
Power - Peak Pulse	1500W (1.5kW)
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the CD214C-T20ALF is determined by strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 20V
Voltage - Breakdown (Min): 22.2V
Voltage - Clamping (Max) @ Ipp: 32.4V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Unidirectional Zener configuration

Direct Equivalents maintain identical electrical specifications and peak pulse current of 46.3A at 1500W power dissipation.

Similar Substitutes maintain core voltage parameters and package compatibility but feature enhanced peak pulse current ratings (62.6A to 155A) and higher power dissipation (3kW to 5kW), providing superior transient protection capability while remaining electrically compatible for the specified 20V standoff voltage application.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Operating Temp	Product Status
CD214C-T20ALF	Bourns Inc.	20V	32.4V	46.3A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Obsolete
SMCJ20A	Fairchild Semiconductor	20V	32.4V	46.3A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active
SMCJ20A-HR	Littelfuse Inc.	20V	32.4V	46.3A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ20A-TP	Micro Commercial Co	20V	32.4V	46.3A	1500W	DO-214AB, SMC	-55°C ~ 175°C	Active
3.0SMCJ20A-13	Diodes Incorporated	20V	32.4V	62.6A	3000W	DO-214AB, SMC	-55°C ~ 175°C	Active
SMDJ20A	Alpha & Omega Semiconductor Inc.	20V	32.4V	92.6A	3000W	DO-214AB, SMC	-55°C ~ 150°C	Active
5.0SMDJ20A	Taiwan Semiconductor Corporation	20V	32.4V	155A	5000W	DO-214AB, SMC	-55°C ~ 175°C	Active
5.0SMDJ20A-T7	Littelfuse Inc.	20V	32.4V	155A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active
LNBTVS4-222S	STMicroelectronics	20V	30V	334A (8/20µs)	22500W	DO-214AB, SMC	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

SMCJ20A (Fairchild Semiconductor), SMCJ20A-HR (Littelfuse Inc.), and SMCJ20A-TP (Micro Commercial Co) provide identical electrical performance to the CD214C-T20ALF with 46.3A peak pulse current and 1500W power dissipation. All three are active products with ROHS3 compliance. SMCJ20A-TP offers the widest operating temperature range (-55°C to 175°C), while SMCJ20A-HR extends the lower temperature limit to -65°C. Selection among these three depends on availability, packaging preference (Bulk vs. Tape & Reel), and temperature requirements.

Enhanced Performance Alternatives:

For applications requiring higher transient energy absorption, 3.0SMCJ20A-13 (Diodes Incorporated) and SMDJ20A (Alpha & Omega Semiconductor Inc.) maintain identical voltage parameters while providing 62.6A and 92.6A peak pulse current respectively, with 3000W power dissipation. These are suitable for designs where additional margin against transient overstress is beneficial.

Maximum Protection Option:

5.0SMDJ20A (Taiwan Semiconductor Corporation) and 5.0SMDJ20A-T7 (Littelfuse Inc.) deliver 155A peak pulse current and 5000W power dissipation, providing the highest transient protection capability within the 20V standoff voltage class. These are appropriate for high-energy transient environments or applications with stringent reliability requirements.

STMicroelectronics LNBTVS4-222S:

This part maintains 20V standoff voltage but features 30V maximum clamping voltage (versus 32.4V) and 334A peak pulse current with 22.5kW power dissipation. The higher clamping voltage and significantly elevated current rating make this suitable only for applications where the 30V clamping specification is acceptable and maximum transient energy handling is required.

All recommended substitutes are ROHS3 compliant and active products, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can I use SMCJ20A as a direct replacement for CD214C-T20ALF?

A: Yes. SMCJ20A from Fairchild Semiconductor is a direct electrical equivalent with identical voltage ratings (20V standoff, 32.4V clamping), peak pulse current (46.3A), and power dissipation (1500W). Both use the DO-214AB (SMC) package. The primary difference is product status: CD214C-T20ALF is obsolete while SMCJ20A is active.

Q: What is the difference between SMCJ20A and SMDJ20A?

A: Both maintain the same voltage parameters (20V standoff, 32.4V clamping) and DO-214AB package. The key difference is peak pulse current and power rating: SMCJ20A handles 46.3A at 1500W, while SMDJ20A handles 92.6A at 3000W. SMDJ20A provides double the transient energy absorption capability.

Q: Why would I choose 5.0SMDJ20A over SMCJ20A?

A: 5.0SMDJ20A is selected when the application requires higher transient energy absorption. It maintains the same 20V standoff and 32.4V clamping voltages but provides 155A peak pulse current and 5000W power dissipation, compared to SMCJ20A's 46.3A and 1500W. Use this for high-energy transient environments or designs requiring additional protection margin.

Q: Are all substitute parts available in the same package?

A: Yes. All listed substitutes use the DO-214AB (SMC) surface mount package, ensuring mechanical and electrical compatibility with the original CD214C-T20ALF footprint. Packaging format (Bulk, Tape & Reel, Cut Tape) varies by manufacturer and supplier but does not affect board-level compatibility.

Q: What about the LNBTVS4-222S from STMicroelectronics?

A: LNBTVS4-222S maintains the 20V standoff voltage but specifies 30V maximum clamping (versus 32.4V for the original). It provides exceptional transient handling with 334A peak pulse current and 22.5kW power dissipation. This part is suitable only if the 30V clamping specification is acceptable for your application and maximum transient protection is required.

Q: Do all substitutes meet RoHS3 compliance?

A: Yes. All active substitute parts listed are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components.

Q: What operating temperature range should I consider?

A: The original CD214C-T20ALF operates from -55°C to 150°C. Direct equivalents maintain this range, while some alternatives extend it: SMCJ20A-TP and 5.0SMDJ20A reach 175°C, and SMCJ20A-HR and 5.0SMDJ20A-T7 extend to -65°C minimum. Select based on your application's thermal requirements.

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