CD214C-T43ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T43ALF is a 43V 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 69.4V maximum clamping voltage and 21.6A peak pulse current capability in the 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-T43ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener, Unidirectional
Voltage - Reverse Standoff (Typ)	43V
Voltage - Breakdown (Min)	47.8V
Voltage - Clamping (Max) @ Ipp	69.4V
Current - Peak Pulse (10/1000µs)	21.6A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the CD214C-T43ALF are classified into two categories based on electrical parameter compatibility:

Direct Equivalents (Identical Electrical Performance): Parts meeting all critical electrical parameters: 43V reverse standoff voltage, 47.8V minimum breakdown voltage, 69.4V maximum clamping voltage, and 21.6A to 21.7A peak pulse current. These parts maintain the 1500W peak pulse power rating and DO-214AB (SMC) package configuration. Direct equivalents include SMCJ43A (MDD), SMCJ43A-13-F (Diodes Incorporated), SMCJ43A-HR (Littelfuse Inc.), SMCJ43A-HRA (Littelfuse Inc.), SMCJ43A-HRAT7 (Littelfuse Inc.), and SMCJ43A-TP (Micro Commercial Co).

Similar Parts (Higher Power Rating): Parts with identical voltage parameters but increased peak pulse current and power dissipation capability. These include 5.0SMDJ43A (Taiwan Semiconductor Corporation) and 5.0SMDJ43A-T7 (Littelfuse Inc.), both rated for 72.1A peak pulse current and 5000W peak pulse power. These parts provide enhanced transient protection capability while maintaining voltage compatibility.

Parameter Comparison

Parameter	CD214C-T43ALF (Main)	SMCJ43A (MDD)	SMCJ43A-13-F (Diodes Inc.)	SMCJ43A-HR (Littelfuse)	SMCJ43A-TP (MCC)	5.0SMDJ43A (TSC)	5.0SMDJ43A-T7 (Littelfuse)
Voltage - Reverse Standoff (Typ)	43V	43V	43V	43V	43V	43V	43V
Voltage - Breakdown (Min)	47.8V	47.8V	47.8V	47.8V	47.8V	47.8V	47.8V
Voltage - Clamping (Max) @ Ipp	69.4V	69.4V	69.4V	69.4V	69.4V	69.4V	69.4V
Current - Peak Pulse (10/1000µs)	21.6A	21.7A	21.6A	21.7A	21.7A	72.1A	72.1A
Power - Peak Pulse	1500W	1500W	1500W	1500W	1500W	5000W	5000W
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Operating Temperature	-55°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 175°C	-65°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): SMCJ43A (MDD), SMCJ43A-13-F (Diodes Incorporated), SMCJ43A-HR (Littelfuse Inc.), SMCJ43A-HRA (Littelfuse Inc.), SMCJ43A-HRAT7 (Littelfuse Inc.), and SMCJ43A-TP (Micro Commercial Co) are all active products meeting the electrical specifications of the obsolete CD214C-T43ALF. All substitute parts are ROHS3 compliant with MSL 1 rating. Selection among these direct equivalents depends on availability, lead time, and packaging requirements (Tape & Reel vs. bulk).

For Enhanced Protection (Higher Power Rating): 5.0SMDJ43A (Taiwan Semiconductor Corporation) and 5.0SMDJ43A-T7 (Littelfuse Inc.) provide identical voltage protection with 3.3× higher peak pulse current (72.1A vs. 21.6A) and 5000W peak pulse power capability. These parts are suitable for applications requiring greater transient energy absorption while maintaining the same voltage clamping characteristics. Both are ROHS3 compliant and active products.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage processes. Temperature operating ranges vary slightly; SMCJ43A-TP and 5.0SMDJ43A extend to 175°C maximum junction temperature, providing additional thermal margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can SMCJ43A (MDD) be used as a direct replacement for CD214C-T43ALF? A: Yes. SMCJ43A meets all critical electrical parameters: 43V reverse standoff, 47.8V breakdown, 69.4V clamping, and 21.7A peak pulse current. Both use DO-214AB (SMC) packaging. The part is active and ROHS3 compliant.

Q: What is the difference between direct equivalents and the 5.0SMDJ43A series? A: Direct equivalents (SMCJ43A variants) maintain 1500W peak pulse power and 21.6-21.7A current. The 5.0SMDJ43A series provides 5000W peak pulse power and 72.1A current while maintaining identical voltage specifications. Use 5.0SMDJ43A for applications requiring higher transient energy absorption.

Q: Are all substitute parts available in Tape & Reel packaging? A: Yes. All listed substitute parts are available in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Q: Does operating temperature range affect substitution compatibility? A: Operating temperature ranges vary among substitutes. SMCJ43A (MDD) operates -50°C to 150°C, while SMCJ43A-HR and SMCJ43A-HRA extend to -65°C. SMCJ43A-TP and 5.0SMDJ43A extend to 175°C. Select based on application temperature requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the original CD214C-T43ALF.

Q: Can I use SMCJ43A-13-F as a drop-in replacement? A: Yes. SMCJ43A-13-F (Diodes Incorporated) is electrically identical to CD214C-T43ALF with matching 21.6A peak pulse current, 69.4V clamping voltage, and DO-214AB packaging. It is an active product with full ROHS3 compliance.

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