CD214A-T43CALF Equivalent & Substitute Parts

Part Overview

The CD214A-T43CALF is a bidirectional transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 43V reverse standoff voltage, 69.4V maximum clamping voltage, and 5.7A peak pulse current capability in a DO-214AC (SMA) package. The part is currently obsolete, making equivalent and substitute components necessary for ongoing design support and production requirements.

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)	5.7	A
Power - Peak Pulse	400	W
Package / Case	DO-214AC, SMA	—
Operating Temperature	-55 to 150	°C (TJ)
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by electrical parameter compatibility within defined tolerance bands. The primary substitution criteria are:

Voltage - Reverse Standoff (Typ): Must match 43V
Voltage - Breakdown (Min): Must match 47.8V minimum
Voltage - Clamping (Max) @ Ipp: Tolerance range 69.4V ±10% acceptable
Current - Peak Pulse (10/1000µs): Minimum 5.7A required
Power - Peak Pulse: Must equal or exceed 400W
Package / Case: Must be DO-214AC (SMA) surface mount
Operating Temperature Range: Must support -55°C to 150°C minimum

Substitute parts are classified into two categories:

Direct Equivalents: Parts meeting all electrical parameters within specified tolerances and identical package specifications.

Similar Alternatives: Parts with matching voltage standoff and breakdown characteristics but differing in clamping voltage, peak pulse current, or operating temperature range. These require circuit-level validation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
CD214A-T43CALF	Bourns Inc.	43V	47.8V	69.4V	5.7A	400W	DO-214AC, SMA	-55 to 150°C (TJ)	Obsolete
SMAJ43CA	Good-Ark Semiconductor	43V	47.8V	69.4V	5.8A	400W	DO-214AC, SMA	-55 to 150°C (TJ)	Active
SMAJ43CA-TP	Micro Commercial Co	43V	47.8V	69.4V	5.7A	400W	DO-214AC, SMA	-55 to 175°C (TA)	Active
SMAJ43CA-TP-HF	Micro Commercial Co	43V	47.8V	69.4V	5.7A	400W	DO-214AC, SMA	-55 to 175°C (TJ)	Active
SMAJ43CA-TR	STMicroelectronics	43V	47.8V	91V	25A (8/20µs)	400W	DO-214AC, SMA	-55 to 150°C (TJ)	Active
SM4T50CAY	STMicroelectronics	43V	47.8V	91V	25A (8/20µs)	400W	DO-214AC, SMA	-55 to 150°C (TJ)	Active
P4SMA56CA-E3/5A	Vishay General Semiconductor - Diodes Division	47.8V	53.2V	77V	5.2A	400W	DO-214AC, SMA	-65 to 150°C (TJ)	Active
P4SMA56CA-M3/5A	Vishay General Semiconductor - Diodes Division	47.8V	53.2V	77V	5.2A	400W	DO-214AC, SMA	-65 to 150°C (TJ)	Active

Engineering Selection Recommendations

Direct Substitutes (Preferred):

SMAJ43CA (Good-Ark Semiconductor), SMAJ43CA-TP (Micro Commercial Co), and SMAJ43CA-TP-HF (Micro Commercial Co) are direct electrical equivalents with active product status and ROHS3 compliance. These parts maintain identical voltage standoff, breakdown, and clamping characteristics with equivalent or superior peak pulse current ratings. SMAJ43CA-TP and SMAJ43CA-TP-HF offer extended operating temperature ranges to 175°C, providing additional thermal margin.

Similar Alternatives (Circuit Validation Required):

SMAJ43CA-TR (STMicroelectronics) and SM4T50CAY (STMicroelectronics) maintain matching voltage standoff and breakdown parameters but feature elevated clamping voltage (91V) and significantly higher peak pulse current (25A at 8/20µs pulse width). These parts are suitable for applications requiring enhanced transient energy absorption but require verification that the higher clamping voltage does not exceed downstream component voltage ratings.

P4SMA56CA-E3/5A and P4SMA56CA-M3/5A (Vishay General Semiconductor) feature higher voltage standoff (47.8V) and breakdown (53.2V) characteristics with elevated clamping voltage (77V). These parts are not direct substitutes and require circuit-level analysis to confirm compatibility with the original 43V standoff specification.

All recommended active parts maintain ROHS3 compliance and DO-214AC (SMA) package compatibility with the original CD214A-T43CALF.

Frequently Asked Questions (FAQ)

Q: Can SMAJ43CA directly replace CD214A-T43CALF?

A: Yes. SMAJ43CA matches all critical electrical parameters: 43V reverse standoff, 47.8V breakdown minimum, 69.4V clamping maximum, and 400W peak pulse power. The 5.8A peak pulse current exceeds the original 5.7A specification. Both use DO-214AC (SMA) packaging. Product status is active with ROHS3 compliance.

Q: What is the difference between SMAJ43CA-TP and SMAJ43CA-TP-HF?

A: Both parts are manufactured by Micro Commercial Co with identical electrical specifications. SMAJ43CA-TP-HF includes high-frequency optimization. The primary distinction is operating temperature specification: SMAJ43CA-TP is rated to 175°C (TA), while SMAJ43CA-TP-HF is rated to 175°C (TJ). Both exceed the original -55°C to 150°C range.

Q: Why do STMicroelectronics parts (SMAJ43CA-TR, SM4T50CAY) show 91V clamping voltage instead of 69.4V?

A: These parts maintain the same 43V reverse standoff and 47.8V breakdown minimum as the original, but employ different internal design characteristics resulting in higher clamping voltage and significantly higher peak pulse current (25A). The higher clamping voltage requires verification that protected circuits tolerate this elevated transient voltage level.

Q: Are Vishay P4SMA56CA parts suitable replacements?

A: P4SMA56CA-E3/5A and P4SMA56CA-M3/5A are not direct substitutes. These parts feature

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