CD214L-T54ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T54ALF is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., rated for 54V reverse standoff voltage with 87.1V maximum clamping voltage and 34.4A peak pulse current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across -55°C to 150°C and is housed in a DO-214AB (SMC) surface mount package, compliant with RoHS3 and REACH regulations.

Key Parameters

Parameter	Value
Manufacturer	Bourns Inc.
Part Number	CD214L-T54ALF
Category	Transient Voltage Suppressors (TVS)
Type	Zener, Unidirectional
Voltage - Reverse Standoff (Typ)	54V
Voltage - Breakdown (Min)	60V
Voltage - Clamping (Max) @ Ipp	87.1V
Current - Peak Pulse (10/1000µs)	34.4A
Power - Peak Pulse	3000W (3kW)
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AB, SMC
RoHS Status	RoHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the CD214L-T54ALF is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 54V
Voltage - Breakdown (Min): 60V
Voltage - Clamping (Max) @ Ipp: 87.1V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Type: Zener, Unidirectional

Secondary Considerations:

Current - Peak Pulse (10/1000µs): 34.4A nominal
Power - Peak Pulse: 3000W nominal
Operating Temperature Range: -55°C minimum to 150°C maximum
RoHS3 Compliance and MSL rating

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical voltage ratings, clamping characteristics, and current/power specifications. These provide pin-for-pin and functional replacement without design modification.

Similar Substitutes: Parts with matching voltage parameters and package but differing in peak pulse current, power dissipation, or operating temperature range. These require verification that the application does not exceed the substitute part's current or power ratings.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status	RoHS Status
CD214L-T54ALF	Bourns Inc.	54V	60V	87.1V	34.4A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Obsolete	RoHS3 Compliant
SMLJ54A	Bourns Inc.	54V	60V	87.1V	34.4A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active	RoHS3 Compliant
5.0SMDJ54A	Taiwan Semiconductor Corporation	54V	60V	87.1V	57.5A	5000W	-55°C ~ 175°C	DO-214AB, SMC	Active	RoHS3 Compliant
5.0SMDJ54A-T7	Littelfuse	54V	60V	87.1V	57.5A	5000W	-65°C ~ 150°C	DO-214AB, SMC	Active	RoHS3 Compliant
SMCJ54A	Meritek	54V	60V	87.1V	17.22A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active	RoHS3 Compliant
SMCJ54A-TP	Micro Commercial Co	54V	60V	87.1V	17.3A	1500W	-55°C ~ 175°C	DO-214AB, SMC	Active	RoHS3 Compliant
SMDJ54A	Alpha & Omega Semiconductor Inc.	54V	60V	87.1V	34.5A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active	RoHS3 Compliant
SMDJ54A-HR	Littelfuse Inc.	54V	60V	87.1V	34.4A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active	RoHS3 Compliant
TPSMC62A	Littelfuse Inc.	53V	58.9V	85V	17.9A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active	RoHS3 Compliant
TPSMC68A	Littelfuse Inc.	58.1V	64.6V	92V	16.5A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active	RoHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Preferred):

SMLJ54A (Bourns Inc.) and SMDJ54A-HR (Littelfuse Inc.) are direct functional equivalents with identical voltage ratings, clamping characteristics, and current specifications. Both are active products with RoHS3 compliance and MSL 1 rating. SMLJ54A is available in higher inventory (13,401 pcs) and maintains the same operating temperature range as the original part. SMDJ54A-HR extends the lower operating temperature to -65°C, suitable for applications requiring enhanced cold-temperature performance.

Tier 2 - Enhanced Performance Substitutes:

SMDJ54A (Alpha & Omega Semiconductor Inc.) provides equivalent voltage and current ratings with active product status and RoHS3 compliance. 5.0SMDJ54A (Taiwan Semiconductor Corporation) and 5.0SMDJ54A-T7 (Littelfuse) offer increased peak pulse current (57.5A) and power dissipation (5000W), providing design margin for applications approaching the original part's limits. These are suitable when higher transient energy absorption is required.

Tier 3 - Reduced Performance Substitutes:

SMCJ54A (Meritek) and SMCJ54A-TP (Micro Commercial Co) maintain voltage compatibility but reduce peak pulse current to 17.22A–17.3A and power to 1500W. These are applicable only when the application's transient energy is confirmed to remain below 1500W.

Not Recommended:

TPSMC62A and TPSMC68A deviate from the specified voltage ratings (53V and 58.1V standoff respectively) and are not suitable substitutes for the CD214L-T54ALF.

Frequently Asked Questions (FAQ)

Q: Can SMLJ54A directly replace CD214L-T54ALF without PCB modification?

A: Yes. SMLJ54A is a direct equivalent with identical voltage ratings (54V standoff, 87.1V clamping), current specifications (34.4A), and DO-214AB SMC package. No design changes are required.

Q: What is the difference between SMDJ54A and SMDJ54A-HR?

A: Both parts are functionally equivalent with 54V standoff and 87.1V clamping. SMDJ54A-HR extends the lower operating temperature to -65°C compared to -55°C for standard SMDJ54A, providing enhanced performance in cold environments. SMDJ54A-HR is also available in Tape & Reel packaging.

Q: Can I use 5.0SMDJ54A as a substitute?

A: Yes, with verification. 5.0SMDJ54A maintains the same voltage ratings but increases peak pulse current to 57.5A and power to 5000W. This provides additional transient energy absorption capability. The part is suitable if your application does not require the extended lower temperature range of the original (-55°C minimum).

Q: Why are SMCJ54A and SMCJ54A-TP listed as substitutes if they have lower current ratings?

A: These parts maintain the critical voltage parameters (54V standoff, 87.1V clamping) but are rated for only 17.22A–17.3A peak pulse current and 1500W power. They are substitutes only for applications confirmed to operate below these limits. Use only after verifying that transient energy in your circuit does not exceed 1500W.

Q: Are TPSMC62A and TPSMC68A suitable replacements?

A: No. These parts deviate from the specified voltage ratings. TPSMC62A operates at 53V standoff with 85V clamping, and TPSMC68A operates at 58.1V standoff with 92V clamping. Neither meets the CD214L-T54ALF voltage specification and are not recommended for direct substitution.

Q: What packaging options are available for substitutes?

A: All substitute parts use the DO-214AB (SMC) surface mount package, matching the original. SMLJ54A, 5.0SMDJ54A-T7, SMDJ54A-HR, and SMCJ54A-TP are available in Tape & Reel (TR) packaging for automated assembly. Verify packaging requirements with your procurement process.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance.

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