CD214C-T43CALF Equivalent & Substitute Parts

Part Overview

The CD214C-T43CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a 43V reverse standoff voltage and provides 69.4V clamping at peak pulse current. The component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical equivalence across voltage ratings, clamping characteristics, and peak pulse current specifications while meeting the same environmental and compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	43	V
Voltage - Breakdown (Min)	47.8	V
Voltage - Clamping (Max) @ Ipp	69.4	V
Current - Peak Pulse (10/1000µs)	21.6	A
Power - Peak Pulse	1500	W
Package / Case	DO-214AB (SMC)	—
Operating Temperature Range	-55 to 150	°C
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 43V (exact match required)
Voltage - Clamping (Max) @ Ipp: 69.4V (exact match required)
Voltage - Breakdown (Min): 47.8V (exact match required)
Package / Case: DO-214AB (SMC) (exact match required)
Bidirectional Channels: 1 (exact match required)
Type: Zener (exact match required)

Secondary Compatibility Parameters:

Current - Peak Pulse (10/1000µs): 21.6A minimum (equal or greater acceptable)
Power - Peak Pulse: 1500W minimum (equal or greater acceptable)
Operating Temperature Range: -55°C to 150°C minimum (equal or wider acceptable)
RoHS3 Compliance: Required
Moisture Sensitivity Level: 1 (Unlimited) preferred

Substitute parts are classified as Direct (identical electrical and mechanical specifications) or Similar (matching core voltage and package parameters with enhanced current/power ratings or extended temperature ranges).

Parameter Comparison

Part Number	Manufacturer	Voltage Standoff (V)	Voltage Clamp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Package	Temp Range (°C)	Product Status
CD214C-T43CALF	Bourns Inc.	43	69.4	21.6	1500	DO-214AB (SMC)	-55 to 150	Obsolete
SMCJ43CA	Meritek	43	69.4	21.61	1500	DO-214AB (SMC)	-55 to 150	Active
5.0SMDJ43CA-T7	Littelfuse Inc.	43	69.4	72.1	5000	DO-214AB (SMC)	-65 to 150	Active
SMC3K43CA-M3/57	Vishay General Semiconductor	43	69.4	43.2	3000	DO-214AB (SMC)	-55 to 150	Active
SMCJ43CA-HR	Littelfuse Inc.	43	69.4	21.7	1500	DO-214AB (SMC)	-65 to 150	Active
SMCJ43CA-TP	Micro Commercial Co	43	69.4	21.7	1500	DO-214AB (SMC)	-55 to 175	Active
SMDJ43CA	Alpha & Omega Semiconductor Inc.	43	69.4	43.3	3000	DO-214AB (SMC)	-55 to 150	Active
SMDJ43CA-T7	Littelfuse Inc.	43	69.4	43.2	3000	DO-214AB (SMC)	-65 to 150	Active

Engineering Selection Recommendations

Direct Substitutes (Electrical and Mechanical Equivalence):

SMCJ43CA (Meritek) provides the closest electrical match with 21.61A peak pulse current and 1500W power rating, matching the original CD214C-T43CALF specifications. This part is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating, making it suitable for direct replacement in existing designs.

Enhanced Substitutes (Higher Current/Power Ratings):

Parts including 5.0SMDJ43CA-T7 (Littelfuse), SMC3K43CA-M3/57 (Vishay), SMDJ43CA (Alpha & Omega), and SMDJ43CA-T7 (Littelfuse) maintain identical voltage specifications while providing increased peak pulse current (43.2A to 72.1A) and power dissipation (3000W to 5000W). These components are suitable for applications requiring enhanced transient protection margins. Extended temperature range variants (SMCJ43CA-HR and SMDJ43CA-T7) support operation to -65°C, beneficial for harsh environment applications.

Temperature Range Considerations:

SMCJ43CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C, providing thermal margin for high-ambient applications while maintaining the 1500W power specification.

All recommended substitutes maintain ROHS3 compliance and DO-214AB (SMC) package compatibility, ensuring PCB layout and assembly process compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can SMCJ43CA directly replace CD214C-T43CALF without circuit modification?

A: Yes. SMCJ43CA maintains identical voltage ratings (43V standoff, 69.4V clamp), peak pulse current (21.61A), and power dissipation (1500W). The DO-214AB package is mechanically and electrically compatible. No circuit changes are required.

Q: What is the difference between Direct and Similar substitute classifications?

A: Direct substitutes (SMCJ43CA) match all electrical and mechanical parameters of the original part. Similar substitutes maintain core voltage and package specifications but offer enhanced current handling (43.2A to 72.1A) or power ratings (3000W to 5000W), providing additional protection margin in the same package footprint.

Q: Are higher current-rated parts (5.0SMDJ43CA-T7, SMDJ43CA) backward compatible?

A: Yes. Higher current and power ratings do not affect circuit operation. These parts clamp at the same 69.4V voltage and trigger at the same 43V standoff voltage. The increased current capacity provides additional transient suppression capability without changing circuit behavior.

Q: Does operating temperature range affect substitution suitability?

A: Temperature range affects application suitability, not electrical substitution. Parts with extended ranges (-65°C to 150°C or -55°C to 175°C) are suitable for wider environmental conditions. Standard range parts (-55°C to 150°C) are adequate for typical industrial applications. Selection depends on system operating requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance, meeting environmental and regulatory requirements equivalent to the original CD214C-T43CALF.

Q: Can I use SMCJ43CA-TP with its 175°C upper temperature limit in place of the standard 150°C rated original?

A: Yes. The extended temperature capability provides additional thermal margin and is fully compatible. This substitution is beneficial for applications operating in elevated ambient conditions.

Q: What packaging format should I specify for production orders?

A: All substitutes are available in Tape & Reel (TR) format for automated assembly. Verify packaging availability with your supplier, as some parts may also be available in alternative formats. The DO-214AB (SMC) package specification remains constant across all substitutes.

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