CD214A-T85CALF Equivalent & Substitute Parts

Part Overview

The CD214A-T85CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features an 85V reverse standoff voltage with a 137V maximum clamping voltage and 2.9A peak pulse current capability in a DO-214AC (SMA) package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214A-T85CALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	85V
Voltage - Breakdown (Min)	94.4V
Voltage - Clamping (Max) @ Ipp	137V
Current - Peak Pulse (10/1000µs)	2.9A
Power - Peak Pulse	400W
Package / Case	DO-214AC (SMA)
Operating Temperature	-55°C ~ 150°C (TJ)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD214A-T85CALF is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 85V
Voltage - Clamping (Max) @ Ipp: 137V (±tolerance range)
Package / Case: DO-214AC (SMA)
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener

Substitute parts are grouped into two categories:

Direct Substitutes maintain electrical parameters within the specified tolerances of the original part, ensuring drop-in compatibility.

Similar Substitutes share the same reverse standoff voltage and package but exhibit variations in clamping voltage, peak pulse current, or power dissipation characteristics. These parts require circuit-level evaluation to confirm suitability.

Parameter Comparison

Parameter	CD214A-T85CALF (Bourns)	SMAJ85CA (Meritek)	SMA6J85CA-TR (STMicroelectronics)	SMAJ85CA-TR (STMicroelectronics)
Voltage - Reverse Standoff (Typ)	85V	85V	85V	85V
Voltage - Breakdown (Min)	94.4V	94.4V	94V	94V
Voltage - Clamping (Max) @ Ipp	137V	137V	146V	178V
Current - Peak Pulse (10/1000µs)	2.9A	2.92A	22.5A (8/20µs)	13A (8/20µs)
Power - Peak Pulse	400W	400W	600W	400W
Package / Case	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C	-55°C ~ 175°C (TJ)	-55°C ~ 150°C (TJ)
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitute - SMAJ85CA (Meritek)

The SMAJ85CA from Meritek provides the closest electrical match to the CD214A-T85CALF. Both parts maintain identical reverse standoff voltage (85V), breakdown voltage (94.4V), clamping voltage (137V), and power dissipation (400W). The peak pulse current specification differs marginally (2.92A vs. 2.9A), representing a negligible variance. This part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating, making it the preferred direct replacement for applications requiring equivalent performance.

Similar Substitutes - SMA6J85CA-TR and SMAJ85CA-TR (STMicroelectronics)

Both STMicroelectronics parts share the 85V reverse standoff voltage and DO-214AC package but exhibit elevated clamping voltages and peak pulse current ratings. The SMA6J85CA-TR specifies 146V clamping with 22.5A peak pulse current, while the SMAJ85CA-TR specifies 178V clamping with 13A peak pulse current. These parts are suitable for applications where higher transient energy absorption or elevated clamping voltage thresholds are acceptable. Both are active products with ROHS3 compliance and extended operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can SMAJ85CA be used as a direct replacement for CD214A-T85CALF?

A: Yes. The SMAJ85CA maintains identical reverse standoff voltage (85V), breakdown voltage (94.4V), clamping voltage (137V), and power dissipation (400W) specifications. The peak pulse current variance (2.92A vs. 2.9A) is within acceptable engineering tolerance for general-purpose TVS applications.

Q: What is the primary difference between the direct substitute and similar substitutes?

A: The SMAJ85CA (direct substitute) matches the clamping voltage specification at 137V. The SMA6J85CA-TR and SMAJ85CA-TR (similar substitutes) exhibit higher clamping voltages (146V and 178V respectively) and increased peak pulse current ratings, requiring circuit evaluation to confirm compatibility with the original design intent.

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

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

Q: Do the substitute parts meet the same compliance standards?

A: All substitute parts are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the compliance profile of the original CD214A-T85CALF.

Q: Why is the CD214A-T85CALF marked as obsolete?

A: The part is no longer manufactured by Bourns Inc. Active substitute parts from Meritek and STMicroelectronics provide equivalent or enhanced functionality for ongoing design support.

Q: What operating temperature range should be considered when selecting a substitute?

A: The original part operates from -55°C to 150°C. The SMAJ85CA maintains this range. The SMA6J85CA-TR extends to 175°C, providing additional thermal margin if required by the application.

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