CD214L-T14ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T14ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 14V reverse standoff with 23.2V clamping voltage and 129.4A peak pulse current in a surface mount DO-214AB (SMC) package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214L-T14ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	14V
Voltage - Breakdown (Min)	15.6V
Voltage - Clamping (Max) @ Ipp	23.2V
Current - Peak Pulse (10/1000µs)	129.4A
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 for the CD214L-T14ALF is determined by the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

Voltage - Reverse Standoff (Typ): 14V
Voltage - Breakdown (Min): 15.6V
Voltage - Clamping (Max) @ Ipp: 23.2V
Current - Peak Pulse (10/1000µs): 129.4A (or higher)
Power - Peak Pulse: 3000W (or higher)
Unidirectional Channels: 1
Type: Zener

Mechanical Matching Criteria:

Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C (minimum)

Compliance Criteria:

RoHS3 Compliant
Moisture Sensitivity Level (MSL): 1

Substitute parts are grouped into two categories:

Category 1 - Direct Electrical & Mechanical Equivalents (3000W Power Rating): Parts with identical voltage specifications, 129.4A peak pulse current, 3000W power rating, and DO-214AB package. These provide one-to-one functional replacement.

Category 2 - Enhanced Performance Substitutes (5000W Power Rating): Parts with identical voltage specifications but higher peak pulse current (216A) and 5000W power rating. These provide superior transient protection capability while maintaining electrical compatibility.

Category 3 - Reduced Performance Substitutes (1500W Power Rating): Parts with identical voltage specifications but lower peak pulse current (64.66A) and 1500W power rating. These are suitable only for applications with reduced transient energy requirements.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status	RoHS Status
CD214L-T14ALF	Bourns Inc.	14V	23.2V	129.4A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Obsolete	ROHS3 Compliant
SMLJ14A	Bourns Inc.	14V	23.2V	129.4A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant
5.0SMDJ14A	MDE Semiconductor Inc	14V	23.2V	216A	5000W	-55°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant
5.0SMDJ14A-T7	Littelfuse Inc.	14V	23.2V	216A	5000W	-65°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant
SMCJ14A	Meritek	14V	23.2V	64.66A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant
SMDJ14A	Alpha & Omega Semiconductor Inc.	14V	23.2V	129.4A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant
SMDJ14A-HR	Littelfuse Inc.	14V	23.2V	129.3A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant
SMDJ14A-HRA	Littelfuse Inc.	14V	23.2V	129.3A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant
SMDJ14A-HRAT7	Littelfuse Inc.	14V	23.2V	129.3A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant
TPSMC15A	Littelfuse	12.8V	21.2V	71.7A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

SMLJ14A (Bourns Inc.) and SMDJ14A (Alpha & Omega Semiconductor Inc.) are direct functional equivalents to the CD214L-T14ALF. Both maintain identical electrical specifications (14V standoff, 23.2V clamping, 129.4A peak pulse, 3000W power), DO-214AB package, and ROHS3 compliance. Both are in active product status, ensuring long-term availability and supply chain stability.

Enhanced Performance Substitutes:

5.0SMDJ14A (MDE Semiconductor Inc.) and 5.0SMDJ14A-T7 (Littelfuse Inc.) provide superior transient suppression with 216A peak pulse current and 5000W power rating while maintaining the same voltage specifications and DO-214AB package. These are suitable for applications requiring higher transient energy absorption. The 5.0SMDJ14A-T7 variant extends the operating temperature range to -65°C, providing additional thermal margin.

Littelfuse High-Reliability Variants:

SMDJ14A-HR, SMDJ14A-HRA, and SMDJ14A-HRAT7 are high-reliability versions from Littelfuse with 129.3A peak pulse current and 3000W power rating. These variants feature extended operating temperature range (-65°C to 150°C) and are suitable for applications requiring enhanced reliability specifications.

Limited Performance Substitutes:

SMCJ14A (Meritek) and TPSMC15A (Littelfuse) are reduced-performance alternatives. SMCJ14A maintains the 14V voltage specification but with only 64.66A peak pulse and 1500W power. TPSMC15A has different voltage specifications (12.8V standoff, 21.2V clamping) and is not recommended as a direct substitute unless application requirements specifically allow for these parameter variations.

Frequently Asked Questions (FAQ)

Q: Can SMLJ14A directly replace CD214L-T14ALF without circuit modification?

A: Yes. SMLJ14A is a direct equivalent with identical electrical specifications (14V standoff, 23.2V clamping, 129.4A peak pulse, 3000W power) and DO-214AB package. No circuit modifications are required.

Q: What is the advantage of using 5.0SMDJ14A-T7 over SMLJ14A?

A: The 5.0SMDJ14A-T7 provides higher transient energy absorption (216A peak pulse, 5000W power) and extended operating temperature range (-65°C to 150°C versus -55°C to 150°C). Use this variant if the application experiences higher transient stress or requires operation at lower temperatures.

Q: Is SMCJ14A a suitable replacement for CD214L-T14ALF?

A: SMCJ14A maintains the same voltage specifications but has reduced peak pulse current (64.66A versus 129.4A) and lower power rating (1500W versus 3000W). It is suitable only for applications with lower transient energy requirements. Verify application transient specifications before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and have MSL rating of 1 (Unlimited), matching the original CD214L-T14ALF specifications.

Q: What is the difference between SMDJ14A-HR, SMDJ14A-HRA, and SMDJ14A-HRAT7?

A: All three are Littelfuse high-reliability variants with identical electrical specifications (14V standoff, 23.2V clamping, 129.3A peak pulse, 3000W power) and extended operating temperature range (-65°C to 150°C). The suffix designations indicate packaging and tape configuration variants. Electrical performance is equivalent across all three.

Q: Can TPSMC15A be used as a substitute?

A: TPSMC15A has different voltage specifications (12.8V standoff, 21.2V clamping) compared to the CD214L-T14ALF (14V standoff, 23.2V clamping). It is not recommended as a direct substitute unless application requirements specifically allow for these voltage parameter variations.

Q: Which substitute offers the best long-term availability?

A: SMLJ14A (Bourns Inc.) and SMDJ14A (Alpha & Omega Semiconductor Inc.) are both in active product status with established supply chains. Both are recommended for new designs requiring long-term component availability.

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