ACPDT-12VUA-HF Equivalent & Substitute Parts

Part Overview

The ACPDT-12VUA-HF is a transient voltage suppressor (TVS) diode manufactured by Comchip Technology, designed for surface mount applications in SOT-23-3 packaging. This unidirectional zener diode provides transient voltage protection with a 12V reverse standoff voltage and 28V maximum clamping voltage at peak pulse current. The device is qualified to AEC-Q101 automotive standards and operates across -40°C to 125°C.

This part is currently listed as obsolete. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring comparable transient voltage suppression performance.

Substiute Parts

ACPDT-12VUA-HF

Comchip TechnologyIn Stock: 4661ACPDT-12VUA-HF Datasheet

Current PartRFQ

ESDA14V2LY

STMicroelectronicsIn Stock: 17295ESDA14V2LY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ACPDT-12VUA-HF is determined by the following critical parameters:

• Reverse Standoff Voltage: 12V (must match)
• Unidirectional Channels: 2 (must match)
• Package Type: SOT-23-3 (must match for PCB compatibility)
• Mounting Type: Surface Mount (must match)
• Voltage - Clamping (Max) @ Ipp: Must be equal to or lower than 28V
• Current - Peak Pulse (8/20µs): Must be equal to or greater than 12A
• Power - Peak Pulse: Must be equal to or greater than 300W
• Automotive Grade & AEC-Q101 Qualification: Required for automotive applications

The ESDA14V2LY from STMicroelectronics meets all substitution criteria with identical reverse standoff voltage, channel configuration, and package specifications. The substitute part maintains automotive qualification and exceeds the peak pulse current requirement.

Parameter Comparison

Engineering Selection Recommendations

The ESDA14V2LY is a direct substitute for the ACPDT-12VUA-HF based on the following engineering criteria:

Compliance & Certification: Both parts maintain automotive-grade qualification and AEC-Q101 certification, meeting the same reliability and quality standards required for automotive applications.

Electrical Performance: The substitute part meets or exceeds all critical electrical parameters. The ESDA14V2LY provides superior peak pulse current capability (14A versus 12A) and lower clamping voltage (21V versus 28V), resulting in improved transient suppression performance.

Package & Mounting Compatibility: Identical SOT-23-3 surface mount packaging ensures direct PCB layout compatibility without redesign.

Product Status: The ESDA14V2LY is in active production status, ensuring long-term availability and supply chain stability compared to the obsolete ACPDT-12VUA-HF.

Operating Temperature Range: The substitute part extends the upper operating temperature limit to 150°C, providing additional thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the ESDA14V2LY directly replace the ACPDT-12VUA-HF without PCB modifications?

A: Yes. Both parts use identical SOT-23-3 surface mount packaging with the same pinout and footprint. No PCB layout changes are required.

Q: What is the significance of the lower clamping voltage in the ESDA14V2LY?

A: The ESDA14V2LY clamps at 21V maximum compared to 28V for the ACPDT-12VUA-HF. Lower clamping voltage provides more aggressive transient suppression, protecting downstream components more effectively. This is a performance improvement for the same application.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the ACPDT-12VUA-HF and ESDA14V2LY carry automotive-grade designation and AEC-Q101 qualification, meeting automotive reliability and quality requirements.

Q: Why is the ACPDT-12VUA-HF listed as obsolete?

A: Comchip Technology has discontinued this part number. The ESDA14V2LY from STMicroelectronics provides equivalent or superior performance and remains in active production.

Q: What are the key parameters that must match for substitution?

A: The critical matching parameters are reverse standoff voltage (12V), unidirectional channel configuration (2 channels), and SOT-23-3 package type. The substitute part must also meet or exceed peak pulse current and power ratings while maintaining automotive qualification.

Q: Does the extended operating temperature range of the ESDA14V2LY affect compatibility?

A: No. The extended temperature range (-40°C to 150°C versus -40°C to 125°C) is a superset of the original specification and provides additional design margin without affecting electrical compatibility.