CD214A-T51CALF Equivalent & Substitute Parts

Part Overview

The CD214A-T51CALF 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 51V reverse standoff voltage with an 82.4V maximum clamping voltage and 4.9A peak pulse current capability in a DO-214AC (SMA) package. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214A-T51CALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	51V
Voltage - Breakdown (Min)	56.7V
Voltage - Clamping (Max) @ Ipp	82.4V
Current - Peak Pulse (10/1000µs)	4.9A
Power - Peak Pulse	400W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CD214A-T51CALF is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 51V
Voltage - Clamping (Max) @ Ipp: 82.4V
Current - Peak Pulse (10/1000µs): 4.9A (±0.05A tolerance acceptable)
Power - Peak Pulse: 400W
Package / Case: DO-214AC (SMA)
Bidirectional Channels: 1
Type: Zener

All identified substitute parts maintain these electrical specifications within acceptable engineering tolerances. Packaging and mounting type remain identical across all alternatives, ensuring direct PCB compatibility without layout modifications.

Parameter Comparison

Parameter	CD214A-T51CALF (Bourns)	SMAJ51CA (Good-Ark)	SMAJ51CA-TP (MCC)	TV04A510JB-G (Comchip)	TV04A510JB-HF (Comchip)
Voltage - Reverse Standoff (Typ)	51V	51V	51V	51V	51V
Voltage - Breakdown (Min)	56.7V	56.7V	56.7V	56.7V	56.7V
Voltage - Clamping (Max) @ Ipp	82.4V	82.4V	82.4V	82.4V	82.4V
Current - Peak Pulse (10/1000µs)	4.9A	4.9A	4.9A	4.85A	4.85A
Power - Peak Pulse	400W	400W	400W	400W	400W
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

SMAJ51CA (Good-Ark Semiconductor) and SMAJ51CA-TP (Micro Commercial Co) provide direct electrical and mechanical equivalence to the CD214A-T51CALF. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating. SMAJ51CA-TP offers an extended operating temperature range to 175°C, providing additional thermal margin for applications requiring higher junction temperature tolerance.

TV04A510JB-G and TV04A510JB-HF (Comchip Technology) are functionally equivalent with peak pulse current of 4.85A, representing a 0.05A reduction from the original specification. Both maintain 400W peak pulse power and identical voltage parameters. These parts are active products with full ROHS3 compliance.

All substitute parts maintain identical package geometry (DO-214AC/SMA) and surface-mount compatibility, eliminating the need for PCB redesign or assembly process modification.

Frequently Asked Questions (FAQ)

Q: Can SMAJ51CA-TP be used as a direct replacement for CD214A-T51CALF?

A: Yes. SMAJ51CA-TP maintains all critical electrical parameters: 51V reverse standoff voltage, 82.4V clamping voltage, 4.9A peak pulse current, and 400W peak pulse power. The extended operating temperature range to 175°C provides additional design margin. Package and mounting type are identical.

Q: What is the difference between SMAJ51CA and SMAJ51CA-TP?

A: Both parts are manufactured by different suppliers (Good-Ark vs. Micro Commercial Co) but share identical electrical specifications. SMAJ51CA-TP offers an extended operating temperature range (-55°C to 175°C versus -55°C to 150°C), making it suitable for higher-temperature applications.

Q: Are the Comchip TV04A510JB series parts fully equivalent?

A: TV04A510JB-G and TV04A510JB-HF maintain voltage and power specifications identical to the original part. Peak pulse current is specified at 4.85A, a 0.05A reduction from the 4.9A original specification. This difference falls within typical manufacturing tolerances for TVS diodes and does not affect functional compatibility in general-purpose overvoltage protection applications.

Q: Do all substitute parts require PCB layout changes?

A: No. All substitute parts use the DO-214AC (SMA) package with identical pin spacing and footprint. Direct PCB substitution is possible without layout modification.

Q: What compliance certifications apply to these substitute parts?

A: All substitute parts are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity). REACH status varies by manufacturer but does not affect functional equivalence or compliance for general-purpose applications.

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