CD214A-T48CALF Equivalent & Substitute Parts

Part Overview

The CD214A-T48CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 48V reverse standoff voltage with a 77.4V maximum clamping voltage and 5.2A peak pulse current capability in a DO-214AC (SMA) package. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214A-T48CALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	48V
Voltage - Breakdown (Min)	53.3V
Voltage - Clamping (Max) @ Ipp	77.4V
Current - Peak Pulse (10/1000µs)	5.2A
Power - Peak Pulse	400W
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the CD214A-T48CALF is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 48V (±tolerance)
Voltage - Clamping (Max) @ Ipp: 77.4V (or equivalent range)
Current - Peak Pulse (10/1000µs): 5.2A (or higher)
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Bidirectional Channels: 1

Substitute parts are classified into two categories:

Direct Equivalents: Parts with identical or near-identical electrical specifications and the same voltage rating (48V standoff, 77.4V clamping).

Similar Alternatives: Parts with different voltage ratings or current specifications that may be suitable depending on circuit requirements, but require engineering evaluation for specific applications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
CD214A-T48CALF	Bourns Inc.	48V	77.4V	5.2A	400W	DO-214AC, SMA	-55°C ~ 150°C	Obsolete
SMAJ48CA	MDD	48V	77.4V	5.2A	400W	DO-214AC, SMA	-50°C ~ 150°C	Active
SM4T56CAY	STMicroelectronics	48V	100V	23A (8/20µs)	400W	DO-214AC, SMA	-55°C ~ 150°C	Active
SMA6J48CA-TR	STMicroelectronics	48V	88.4V	40A (8/20µs)	600W	DO-214AC, SMA	-55°C ~ 175°C	Active
P4SMA47CA-M3/61	Vishay General Semiconductor - Diodes Division	40.2V	64.8V	6.2A	400W	DO-214AC, SMA	-65°C ~ 150°C	Active
SMAJ40CA-M3/61	Vishay General Semiconductor - Diodes Division	40V	64.5V	6.2A	400W	DO-214AC, SMA	-55°C ~ 150°C	Active
SMA5J40CA-M3/61	Vishay General Semiconductor - Diodes Division	40V	64.5V	7.8A	500W	DO-214AC, SMA	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Choice):

SMAJ48CA (MDD) is the direct electrical equivalent to CD214A-T48CALF. It maintains identical voltage ratings (48V standoff, 77.4V clamping) and current specifications (5.2A peak pulse). The part is in active production status with ROHS3 compliance and unlimited moisture sensitivity level. The operating temperature range is -50°C to 150°C, which is slightly narrower at the lower end compared to the original part (-55°C to 150°C). This part is suitable for direct replacement in applications where the lower temperature limit is not a constraint.

Alternative Options (Higher Performance):

SMA6J48CA-TR (STMicroelectronics) maintains the 48V standoff voltage but offers enhanced performance with 88.4V clamping voltage, 40A peak pulse current, and 600W power dissipation. This part provides greater transient protection margin and is rated to -55°C to 175°C. It is suitable for applications requiring higher surge current handling or extended temperature operation.

SM4T56CAY (STMicroelectronics) also maintains 48V standoff voltage with 100V clamping and 23A peak pulse current. This part includes automotive-grade qualification (AEC-Q101) and is suitable for automotive or high-reliability applications.

Lower Voltage Alternatives (Not Recommended for Direct Substitution):

Parts such as P4SMA47CA-M3/61, SMAJ40CA-M3/61, and SMA5J40CA-M3/61 feature 40V to 40.2V standoff voltages with lower clamping voltages (64.5V to 64.8V). These parts are not suitable as direct replacements for the CD214A-T48CALF in circuits designed for 48V protection, as they will trigger at lower voltage thresholds.

Frequently Asked Questions (FAQ)

Q: Can SMAJ48CA be used as a direct replacement for CD214A-T48CALF?

A: Yes. SMAJ48CA is electrically equivalent with identical voltage ratings (48V standoff, 77.4V clamping) and current specifications (5.2A peak pulse). Both parts use the DO-214AC (SMA) package. The operating temperature range differs slightly (-50°C to 150°C vs. -55°C to 150°C), so verify that the lower temperature limit is acceptable for your application.

Q: Why are the lower voltage parts (40V standoff) listed as alternatives?

A: Parts with 40V standoff voltage are included for reference but are not suitable as direct replacements for 48V protection circuits. They will activate at lower voltage thresholds and provide inadequate protection for circuits designed around the 48V specification.

Q: What is the difference between the 5.2A and higher current alternatives?

A: The CD214A-T48CALF is rated for 5.2A peak pulse current. Higher current alternatives such as SMA6J48CA-TR (40A) and SM4T56CAY (23A) provide greater transient surge handling capability. These are suitable if your circuit experiences higher transient currents than the original design specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, consistent with the original CD214A-T48CALF specification.

Q: Can I use SMA6J48CA-TR in place of CD214A-T48CALF?

A: Yes, with engineering consideration. SMA6J48CA-TR maintains the 48V standoff voltage and DO-214AC (SMA) package. However, it features higher clamping voltage (88.4V vs. 77.4V) and significantly higher peak pulse current (40A vs. 5.2A). This part is suitable if your circuit can tolerate the higher clamping voltage and benefits from enhanced surge protection.

Q: What is the impact of the -50°C lower temperature limit on SMAJ48CA?

A: SMAJ48CA is rated to -50°C minimum, compared to -55°C for the original part. If your application requires operation below -50°C, verify that SMAJ48CA meets your thermal requirements. Alternatively, select SMA6J48CA-TR or SM4T56CAY, both rated to -55°C.

Q: Are there packaging differences between these parts?

A: All listed substitute parts use the DO-214AC (SMA) surface-mount package, ensuring mechanical and electrical compatibility with the original CD214A-T48CALF footprint.

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