ACPDT-4V0UA-HF Equivalent & Substitute Parts

Part Overview

The ACPDT-4V0UA-HF is a 4V Transient Voltage Suppressor (TVS) diode manufactured by Comchip Technology, designed for surface mount applications in SOT-23 packaging. This component is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. The part operates across automotive-grade specifications with AEC-Q101 qualification, suitable for transient voltage protection in automotive and industrial applications.

Substiute Parts

ACPDT-4V0UA-HF

Comchip TechnologyIn Stock: 841ACPDT-4V0UA-HF Datasheet

Current PartRFQ

GSOT04C-HE3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 950GSOT04C-HE3-18 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ACPDT-4V0UA-HF is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Reverse Standoff Voltage: 4V (matching or equivalent rating)
• Unidirectional Channels: 2 (dual-channel configuration)
• Package Type: SOT-23-3 (surface mount, identical footprint)
• Mounting Type: Surface Mount
• Grade: Automotive with AEC-Q101 qualification

Allowable Parameter Variations:

• Voltage - Clamping (Max) @ Ipp: May exceed 10.5V (higher clamping voltage acceptable for protection margin)
• Current - Peak Pulse: May exceed 17A (higher current rating acceptable)
• Power - Peak Pulse: May exceed 300W (higher power dissipation acceptable)
• Operating Temperature Range: May exceed -40°C ~ 125°C (wider range acceptable)
• Capacitance: Minor variations acceptable within typical diode specifications

The GSOT04C-HE3-18 meets all mandatory criteria while providing enhanced performance characteristics in current handling and power dissipation.

Parameter Comparison

Engineering Selection Recommendations

The GSOT04C-HE3-18 is the qualified substitute for the obsolete ACPDT-4V0UA-HF based on the following engineering criteria:

Compliance & Certification: Both components maintain automotive-grade specifications with AEC-Q101 qualification, ensuring compatibility with automotive design requirements and supply chain standards.

Package Compatibility: Identical SOT-23-3 surface mount packaging ensures direct PCB footprint compatibility without layout modifications.

Electrical Performance: The GSOT04C-HE3-18 provides enhanced performance margins with higher peak pulse current (30A vs. 17A) and greater power dissipation capability (429W vs. 300W), while maintaining the same 4V reverse standoff voltage rating. The higher clamping voltage (14.3V vs. 10.5V) remains within acceptable protection parameters for 4V standoff applications.

Product Status: The GSOT04C-HE3-18 is Active, providing long-term availability and supply continuity compared to the Obsolete status of the original component.

Temperature Range: The extended operating temperature range (-55°C ~ 150°C) of the GSOT04C-HE3-18 provides additional thermal margin for demanding automotive environments.

Frequently Asked Questions (FAQ)

Q: Can the GSOT04C-HE3-18 be used as a direct replacement for the ACPDT-4V0UA-HF?

A: Yes. Both components share identical reverse standoff voltage (4V), dual-channel configuration, and SOT-23-3 package. The GSOT04C-HE3-18 provides equivalent or superior electrical performance with no PCB modifications required.

Q: What is the significance of the higher clamping voltage in the GSOT04C-HE3-18?

A: The GSOT04C-HE3-18 exhibits a maximum clamping voltage of 14.3V compared to 10.5V in the ACPDT-4V0UA-HF. Both values remain within acceptable protection margins for 4V standoff applications. The higher clamping voltage does not compromise circuit protection and may provide additional design margin in certain applications.

Q: Are there any thermal considerations when substituting these components?

A: The GSOT04C-HE3-18 supports a wider operating temperature range (-55°C ~ 150°C) compared to the ACPDT-4V0UA-HF (-40°C ~ 125°C). This provides additional thermal headroom for automotive applications operating in extreme temperature environments.

Q: Does the packaging remain identical between these two parts?

A: Yes. Both components use SOT-23-3 surface mount packaging with identical footprints. No PCB layout changes are necessary for substitution.

Q: What is the impact of the higher peak pulse current rating?

A: The GSOT04C-HE3-18 is rated for 30A peak pulse current compared to 17A in the ACPDT-4V0UA-HF. This higher rating provides additional transient protection capability and design margin without affecting circuit compatibility.

Q: Are both components qualified for automotive applications?

A: Yes. Both the ACPDT-4V0UA-HF and GSOT04C-HE3-18 carry automotive-grade specifications with AEC-Q101 qualification, meeting automotive industry reliability and quality standards.