SMCJ150C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The SMCJ150C is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation, designed for general-purpose overvoltage protection applications. This surface-mount component operates in the 150V reverse standoff voltage range with a peak pulse power rating of 1500W and is housed in a DO-214AB (SMC) package. The part maintains Active product status and is RoHS3 compliant.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across critical parameters including reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, power dissipation, operating temperature range, and package configuration.

Substiute Parts

SMCJ150C

Taiwan Semiconductor CorporationIn Stock: 3241SMCJ150C Datasheet

Current PartRFQ

SMCJ150CA

MeritekIn Stock: 4334SMCJ150CA Datasheet

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SMCJ150CA

MeritekIn Stock: 4334SMCJ150CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMCJ150C are identified based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Reverse standoff voltage: 150V (Typ)
• Breakdown voltage minimum: 167V
• Bidirectional channel configuration: 1 channel
• Peak pulse power rating: 1500W
• Operating temperature range: -55°C to 150°C
• Zener diode type classification

Mechanical Equivalence Criteria:

• Package type: DO-214AB (SMC)
• Mounting configuration: Surface Mount
• Tape & Reel packaging format

Compliance Equivalence Criteria:

• RoHS3 compliance status
• REACH unaffected status
• Active product status

The SMCJ150CA from Meritek qualifies as a substitute part. While the clamping voltage differs (243V versus 266V), this parameter remains within the functional operating envelope for the 150V reverse standoff voltage class. The peak pulse current specification (6.17A versus 5.8A) and all other critical parameters maintain compatibility with the original SMCJ150C design requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the SMCJ150C and SMCJ150CA maintain Active product status, ensuring continued availability and manufacturing support. Both components are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component procurement.

Selection between these parts should be based on:

Availability and Lead Time: The SMCJ150CA (Meritek) currently maintains higher inventory levels (4300 pcs) compared to the SMCJ150C (3200 pcs), which may influence procurement decisions for high-volume applications.

Clamping Voltage Specification: The SMCJ150C specifies a maximum clamping voltage of 266V, while the SMCJ150CA specifies 243V. Both values remain within acceptable operating parameters for 150V reverse standoff voltage class applications. Circuit designs requiring the lower clamping voltage characteristic should specify the SMCJ150CA.

Peak Pulse Current: The SMCJ150CA provides slightly higher peak pulse current capability (6.17A versus 5.8A) while maintaining identical 1500W peak pulse power rating, indicating improved current handling characteristics at equivalent power dissipation levels.

Compliance Certification: Both parts satisfy identical compliance requirements (RoHS3, REACH unaffected, ECCN EAR99, HTSUS 8541.10.0080), eliminating compliance-based differentiation.

Frequently Asked Questions (FAQ)

Q: Can SMCJ150CA be used as a direct replacement for SMCJ150C in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (150V), breakdown voltage (167V minimum), peak pulse power (1500W), operating temperature range (-55°C to 150°C), package configuration (DO-214AB/SMC), and compliance status (RoHS3, REACH unaffected). The clamping voltage difference (243V versus 266V) represents a performance variation within the 150V class specification envelope.

Q: What is the significance of the clamping voltage difference between these parts?

A: Clamping voltage determines the maximum voltage transient that the TVS diode will allow across a protected circuit node during a surge event. The SMCJ150C clamps at 266V maximum, while the SMCJ150CA clamps at 243V maximum. Lower clamping voltage provides tighter protection but may require circuit design verification to ensure compatibility with downstream component voltage ratings.

Q: Are both parts suitable for general-purpose overvoltage protection applications?

A: Yes. Both the SMCJ150C and SMCJ150CA are specified for general-purpose applications. The identical 1500W peak pulse power rating, 150V reverse standoff voltage, and -55°C to 150°C operating temperature range support equivalent application scope.

Q: Do package and mounting differences exist between these parts?

A: No. Both parts use identical DO-214AB (SMC) surface-mount package configuration and Tape & Reel (TR) packaging format, ensuring mechanical and assembly compatibility without PCB redesign or requalification.

Q: What compliance certifications apply to both substitute parts?

A: Both the SMCJ150C and SMCJ150CA are RoHS3 compliant and REACH unaffected. Both carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications, meeting current regulatory requirements for procurement and export.

Q: How does peak pulse current specification affect part selection?

A: The SMCJ150CA specifies 6.17A peak pulse current versus 5.8A for the SMCJ150C. Both maintain the same 1500W peak pulse power rating. Higher peak pulse current capability indicates improved surge handling characteristics at equivalent power dissipation, providing design margin for transient protection circuits.