SMF12CT1 Equivalent & Substitute Parts Reference

Part Overview

The SMF12CT1 is a Transient Voltage Suppressor (TVS) array designed for 5-line protection with 100W peak pulse power rating and 12V reverse standoff voltage. Manufactured by onsemi in SC88 packaging, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is essential for design continuity, procurement planning, and system reliability in applications requiring TVS array protection.

Substiute Parts

SMF12CT1

onsemiIn Stock: 1080SMF12CT1 Datasheet

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SMF12CT1G

onsemiIn Stock: 45577SMF12CT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMF12CT1 is determined by the following critical parameters:

• Power Rating: 100W peak pulse power capability
• Voltage Class: 12V reverse standoff voltage with matching clamping characteristics
• Channel Configuration: 5-line protection array architecture
• Package Type: SC88/SC70-6/SOT-363 surface mount compatibility
• Compliance Profile: RoHS and REACH certification status

The substitute part SMF12CT1G maintains electrical equivalence through identical power dissipation capacity, voltage ratings, and channel count. Both parts share the same base product number (SMF12) and are manufactured by onsemi, ensuring design compatibility and functional interchangeability within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

The SMF12CT1G serves as the direct active substitute for the obsolete SMF12CT1. Selection criteria are based on the following factors:

Product Status: The SMF12CT1G maintains active product status with ongoing manufacturer support and availability, whereas the SMF12CT1 is obsolete and subject to supply discontinuation.

Compliance Certification: The SMF12CT1G achieves ROHS3 compliance, meeting current regulatory requirements for electronic components in restricted substance directives. The original SMF12CT1 is RoHS non-compliant, which may present procurement and regulatory challenges in new designs or manufacturing environments with RoHS mandates.

Electrical Equivalence: Both parts maintain identical 100W power dissipation, 12V reverse standoff voltage, and 5-channel array configuration, ensuring functional interchangeability in circuit protection applications.

Package Compatibility: The SMF12CT1G is available in SC-88/SC70-6/SOT-363 packaging with tape and reel distribution, supporting automated assembly processes and standard PCB footprints compatible with the original SC88 designation.

Frequently Asked Questions (FAQ)

Q: Can SMF12CT1G directly replace SMF12CT1 in existing designs?

A: Yes. Both parts share identical electrical specifications for power rating (100W), reverse standoff voltage (12V), and channel count (5). The SMF12CT1G is packaged in SC-88/SC70-6/SOT-363, which is compatible with the original SC88 footprint. Verification of PCB layout compatibility with the specific package variant is recommended during integration.

Q: What is the primary reason to transition from SMF12CT1 to SMF12CT1G?

A: The SMF12CT1 is classified as obsolete, creating supply chain risk and potential procurement delays. The SMF12CT1G is an active product with stable availability, ongoing manufacturer support, and ROHS3 compliance certification, making it suitable for current and future production requirements.

Q: Are there compliance differences between these parts?

A: Yes. The SMF12CT1G is ROHS3 compliant, whereas the SMF12CT1 is RoHS non-compliant. Both parts are REACH Unaffected. If your application or manufacturing environment requires RoHS compliance, the SMF12CT1G is the appropriate selection.

Q: What packaging options are available for SMF12CT1G?

A: The SMF12CT1G is supplied in Tape & Reel (TR) format with SC-88/SC70-6/SOT-363 package designation, supporting high-volume automated assembly and standard surface mount processes.

Q: Are the electrical parameters identical between SMF12CT1 and SMF12CT1G?

A: The critical parameters—100W peak pulse power, 12V reverse standoff voltage, and 5-channel configuration—are identical. The SMF12CT1G provides additional specified parameters including 23V clamping voltage, 6A peak pulse current (8/20µs), 40pF capacitance at 1MHz, and -40°C to 125°C operating temperature range, which are not specified for the original part but represent standard performance characteristics for this device class.