CD214L-T15ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T15ALF is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., rated for 15V reverse standoff with 24.4V clamping voltage and 123A 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 the DO-214AB (SMC) surface mount package, compliant with RoHS3 and REACH regulations.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	15V
Voltage - Breakdown (Min)	16.7V
Voltage - Clamping (Max) @ Ipp	24.4V
Current - Peak Pulse (10/1000µs)	123A
Power - Peak Pulse	3000W (3kW)
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AB, SMC
Type	Zener, Unidirectional
RoHS Status	RoHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD214L-T15ALF is determined by strict electrical and mechanical compatibility across the following parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 15V (exact match required)
Voltage - Clamping (Max) @ Ipp: 24.4V (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Type: Zener, Unidirectional (exact match required)

Secondary Compatibility Parameters:

Current - Peak Pulse (10/1000µs): 123A or higher acceptable
Power - Peak Pulse: 3000W or higher acceptable
Operating Temperature Range: Must encompass -55°C minimum and 150°C maximum
RoHS3 Compliance: Required for regulatory alignment

Substitute parts are grouped into two categories:

Direct Equivalents (123A Peak Pulse Current): Parts meeting all primary criteria with identical 123A peak pulse current specification.

Higher-Rated Alternatives (205A Peak Pulse Current): Parts with superior current handling (205A) and increased power dissipation (5000W), maintaining all voltage and package requirements while providing enhanced performance margin.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status
CD214L-T15ALF	Bourns Inc.	15V	24.4V	123A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Obsolete
SMLJ15A	Bourns Inc.	15V	24.4V	123A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMDJ15A	Alpha & Omega Semiconductor Inc.	15V	24.4V	123A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMDJ15A-HR	Littelfuse Inc.	15V	24.4V	123A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMLJ15A-TP	Micro Commercial Co	15V	24.4V	123A	3000W	-55°C ~ 175°C	DO-214AB, SMC	Active
5.0SMDJ15A	MDE Semiconductor Inc	15V	24.4V	205A	5000W	-55°C ~ 150°C	DO-214AB, SMC	Active
5.0SMDJ15A-T7	Littelfuse Inc.	15V	24.4V	205A	5000W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMCJ15A-TP	Micro Commercial Co	15V	24.4V	61.5A	1500W	-55°C ~ 175°C	DO-214AB, SMC	Active
SMCJ15A	EVVO Semi	15V	24.4V	61.5A	600W	-65°C ~ 150°C	DO-214AC, SMA	Active
TPSMC15A	Littelfuse	12.8V	21.2V	71.7A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active

Engineering Selection Recommendations

Preferred Direct Equivalents:

SMLJ15A (Bourns Inc.) and SMDJ15A (Alpha & Omega Semiconductor Inc.) are the primary substitutes, offering identical electrical specifications and active product status. Both maintain the 15V reverse standoff, 24.4V clamping voltage, 123A peak pulse current, and 3000W power dissipation of the original CD214L-T15ALF. SMLJ15A is supplied in Tape & Reel packaging with 15,400 units in stock, while SMDJ15A is available in 15,300 units. Both are RoHS3 compliant and suitable for direct replacement.

Extended Temperature Range Options:

SMLJ15A-TP (Micro Commercial Co) extends the operating temperature to -55°C ~ 175°C, providing additional thermal margin for applications requiring higher temperature operation. SMDJ15A-HR (Littelfuse Inc.) offers -65°C ~ 150°C range with enhanced low-temperature performance. Both maintain identical electrical specifications to the original part.

Higher Current Capacity Alternatives:

5.0SMDJ15A (MDE Semiconductor Inc.) and 5.0SMDJ15A-T7 (Littelfuse Inc.) provide 205A peak pulse current and 5000W power dissipation while maintaining 15V reverse standoff and 24.4V clamping voltage. These parts are suitable for applications requiring enhanced transient suppression capability within the same voltage class.

Not Recommended:

SMCJ15A (EVVO Semi) uses DO-214AC (SMA) package instead of DO-214AB (SMC), creating mechanical incompatibility. TPSMC15A (Littelfuse) specifies 12.8V reverse standoff and 21.2V clamping voltage, deviating from the required 15V/24.4V specification and is not suitable for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can SMCJ15A replace CD214L-T15ALF?

A: No. While SMCJ15A shares the same voltage and current ratings, it is packaged in DO-214AC (SMA) instead of DO-214AB (SMC). The different package footprint creates mechanical incompatibility with the original PCB layout.

Q: What is the difference between SMLJ15A and SMDJ15A?

A: Both parts are direct electrical equivalents with identical 15V reverse standoff, 24.4V clamping voltage, 123A peak pulse current, and 3000W power dissipation. The primary difference is manufacturer: SMLJ15A is from Bourns Inc. and SMDJ15A is from Alpha & Omega Semiconductor Inc. Selection depends on supplier availability and procurement preference.

Q: Can I use 5.0SMDJ15A instead of CD214L-T15ALF?

A: Yes. The 5.0SMDJ15A maintains all required voltage specifications (15V reverse standoff, 24.4V clamping) and package format (DO-214AB, SMC). The higher current rating (205A vs. 123A) and increased power dissipation (5000W vs. 3000W) provide enhanced performance margin without creating incompatibility.

Q: Why is TPSMC15A not recommended?

A: TPSMC15A specifies 12.8V reverse standoff and 21.2V clamping voltage, which deviate from the required 15V/24.4V specification. These voltage differences make it unsuitable for direct substitution in circuits designed for the CD214L-T15ALF.

Q: What packaging format is required for substitution?

A: The original CD214L-T15ALF uses DO-214AB (SMC) surface mount package. All recommended substitutes must use the same package format to ensure PCB compatibility. Parts using DO-214AC (SMA) or other packages are not mechanically compatible.

Q: Are all recommended substitutes RoHS3 compliant?

A: Yes. All recommended substitute parts are RoHS3 compliant, maintaining regulatory alignment with the original CD214L-T15ALF specification.

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