CD214L-T150ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T150ALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., classified as a unidirectional Zener-type device in the DO-214AB (SMC) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a reverse standoff voltage of 150V and a clamping voltage of 243V at peak pulse current.

The CD214L-T150ALF is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	150V
Voltage - Breakdown (Min)	167V
Voltage - Clamping (Max) @ Ipp	243V
Current - Peak Pulse (10/1000µs)	12.4A
Power - Peak Pulse	3000W (3kW)
Type	Zener
Unidirectional Channels	1
Package / Case	DO-214AB, SMC
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CD214L-T150ALF are classified into two functional groups based on electrical parameter compatibility:

Group 1: Direct Electrical Equivalents (12.4A Peak Pulse Current) These parts maintain identical electrical performance characteristics to the original component:

Reverse standoff voltage: 150V
Breakdown voltage (Min): 167V
Clamping voltage: 243V
Peak pulse current: 12.4A
Peak pulse power: 3000W
Package: DO-214AB (SMC)

Group 2: Higher Performance Alternatives (20.6A Peak Pulse Current) These parts provide enhanced transient suppression capability with increased peak pulse current and power handling:

Reverse standoff voltage: 150V
Breakdown voltage (Min): 167V
Clamping voltage: 243V
Peak pulse current: 20.6A
Peak pulse power: 5000W
Package: DO-214AB (SMC)

Group 3: Lower Performance Alternatives (6.2A Peak Pulse Current) These parts provide reduced transient suppression capability with lower peak pulse current and power handling:

Reverse standoff voltage: 150V
Breakdown voltage (Min): 167V
Clamping voltage: 243V
Peak pulse current: 6.2A
Peak pulse power: 1500W
Package: DO-214AB (SMC)

All substitute parts share the same voltage ratings, package type, and surface mount configuration as the original CD214L-T150ALF, ensuring mechanical and electrical compatibility within their respective performance tier.

Parameter Comparison

Part Number	Manufacturer	Status	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	RoHS Status
CD214L-T150ALF	Bourns Inc.	Obsolete	150V	243V	12.4A	3000W	-55°C ~ 150°C	DO-214AB (SMC)	ROHS3 Compliant
SMLJ150A	Bourns Inc.	Active	150V	243V	12.4A	3000W	-55°C ~ 150°C	DO-214AB (SMC)	ROHS3 Compliant
SMDJ150A	Alpha & Omega Semiconductor Inc.	Active	150V	243V	12.4A	3000W	-55°C ~ 150°C	DO-214AB (SMC)	ROHS3 Compliant
5.0SMDJ150A	MDE Semiconductor Inc	Active	150V	243V	20.6A	5000W	-55°C ~ 150°C	DO-214AB (SMC)	ROHS3 Compliant
5.0SMDJ150A-T7	Littelfuse	Active	150V	243V	20.6A	5000W	-65°C ~ 150°C	DO-214AB (SMC)	ROHS3 Compliant
SMCJ150A-TP	Micro Commercial Co	Active	150V	243V	6.2A	1500W	-55°C ~ 175°C	DO-214AB (SMC)	ROHS3 Compliant
SMCJ150A	Fairchild Semiconductor	Active	150V	243V	6.2A	1500W	-55°C ~ 150°C	DO-214AB (SMC)	Not specified

Engineering Selection Recommendations

Direct Replacement (Recommended for Pin-Compatible Substitution)

SMLJ150A (Bourns Inc., Active) is the primary direct replacement for the obsolete CD214L-T150ALF. Both components are manufactured by Bourns Inc., share identical electrical specifications (150V standoff, 243V clamping, 12.4A peak pulse), and are packaged in DO-214AB (SMC). SMLJ150A is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

SMDJ150A (Alpha & Omega Semiconductor Inc., Active) provides equivalent electrical performance with identical voltage and current ratings. This part is actively produced and ROHS3 compliant, offering supply chain diversity.

Enhanced Performance Alternative

5.0SMDJ150A (MDE Semiconductor Inc., Active) and 5.0SMDJ150A-T7 (Littelfuse, Active) provide increased transient suppression capability with 20.6A peak pulse current and 5000W power handling, compared to the original 12.4A and 3000W. These parts are suitable for applications requiring higher transient energy absorption while maintaining the same voltage ratings and package configuration. The Littelfuse variant (5.0SMDJ150A-T7) extends the operating temperature range to -65°C, providing additional thermal margin.

Lower Performance Alternative

SMCJ150A-TP (Micro Commercial Co, Active) and SMCJ150A (Fairchild Semiconductor, Active) provide reduced transient suppression with 6.2A peak pulse current and 1500W power handling. These parts are suitable only for applications with lower transient energy requirements. SMCJ150A-TP offers an extended upper operating temperature of 175°C.

All recommended substitutes maintain ROHS3 compliance and the DO-214AB (SMC) surface mount package, ensuring mechanical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can SMLJ150A directly replace CD214L-T150ALF without circuit modification?

A: Yes. SMLJ150A provides identical electrical specifications (150V standoff, 243V clamping, 12.4A peak pulse, 3000W power) and the same DO-214AB (SMC) package. No circuit modifications are required for direct substitution.

Q: What is the difference between the 12.4A and 20.6A peak pulse variants?

A: The 20.6A variants (5.0SMDJ150A and 5.0SMDJ150A-T7) provide higher transient energy absorption capacity (5000W vs. 3000W). Selection depends on the peak transient current and energy levels in the application circuit. Higher-rated parts provide additional design margin but are not required if the original 3000W specification is sufficient.

Q: Are the 6.2A variants (SMCJ150A, SMCJ150A-TP) suitable replacements?

A: The 6.2A variants are electrically compatible in terms of voltage ratings but provide reduced transient suppression capability (1500W vs. 3000W). These parts are suitable only if the application circuit operates with lower transient energy levels than the original design specification.

Q: What is the significance of the -T7 suffix on 5.0SMDJ150A-T7?

A: The -T7 suffix indicates a specific tape and reel packaging configuration from Littelfuse. This variant also extends the operating temperature range to -65°C (compared to -55°C on other variants), providing additional thermal operating margin.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes are ROHS3 compliant. The SMCJ150A variant from Fairchild Semiconductor does not specify RoHS status in the provided data; verification with the manufacturer is recommended if RoHS compliance is a design requirement.

Q: Can substitute parts be mixed in the same production batch?

A: All substitute parts share the same DO-214AB (SMC) package and voltage specifications, allowing mechanical interchangeability on the PCB. However, mixing different manufacturers or performance tiers (12.4A, 20.6A, or 6.2A variants) in the same circuit should be avoided unless the circuit design explicitly accounts for the performance differences.

Q: What is the inventory status of substitute parts?

A: SMLJ150A (814 pcs), SMDJ150A (882 pcs), 5.0SMDJ150A (1936 pcs), 5.0SMDJ150A-T7 (3200 pcs), SMCJ150A-TP (789 pcs), and SMCJ150A (2147 pcs) are all listed as new original stock. Availability should be confirmed with component distributors for current production requirements.

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