ATV02W400-HF Equivalent & Substitute Parts

Part Overview

The ATV02W400-HF is a 40V Transient Voltage Suppressor (TVS) diode manufactured by Comchip Technology, designed for surface mount applications in SOD-123F packaging. This unidirectional Zener diode provides transient voltage protection with a 64.5V maximum clamping voltage and 3.1A peak pulse current capability. The component is actively produced, AEC-Q101 qualified for automotive applications, and ROHS3 compliant. Substitute parts are identified when electrical parameters and mechanical compatibility align with the original specification.

Substiute Parts

ATV02W400-HF

Comchip TechnologyIn Stock: 992ATV02W400-HF Datasheet

Current PartRFQ

SMF40A

MeritekIn Stock: 35300SMF40A Datasheet

DirectRFQ

SMF40A-T13

Littelfuse Inc.In Stock: 20622SMF40A-T13 Datasheet

DirectRFQ

SMF40A-TP

Micro Commercial CoIn Stock: 7340SMF40A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ATV02W400-HF are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 40V
• Voltage - Breakdown (Min): 44.4V
• Voltage - Clamping (Max) @ Ipp: 64.5V
• Current - Peak Pulse (10/1000µs): 3.1A
• Power - Peak Pulse: 200W
• Unidirectional Channels: 1
• Type: Zener
• Mounting Type: Surface Mount
• Package / Case: SOD-123F or SOD-123FL

All identified substitutes maintain identical electrical performance specifications and are compatible with surface mount assembly processes. Package variants (SOD-123F and SOD-123FL) are mechanically and electrically interchangeable for this application.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (SMF40A, SMF40A-T13, and SMF40A-TP) are functionally equivalent to the ATV02W400-HF based on identical electrical specifications. Selection among these options depends on availability, packaging preference, and supply chain requirements.

SMF40A-T13 (Littelfuse Inc.) maintains the same automotive-grade qualification framework as the original part and is packaged in Tape & Reel format, matching the original ATV02W400-HF packaging specification.

SMF40A-TP (Micro Commercial Co) offers an extended operating temperature range (-65°C to 175°C) compared to the original specification (-55°C to 150°C), providing additional thermal margin for demanding applications.

SMF40A (Meritek) is available in the highest inventory quantity and is suitable for general purpose applications where the original automotive qualification is not required.

All substitute parts are ROHS3 compliant and carry identical electrical performance ratings, ensuring direct functional replacement in circuit designs.

Frequently Asked Questions (FAQ)

Q: Can SMF40A-TP be used as a direct replacement for ATV02W400-HF?

A: Yes. SMF40A-TP meets all electrical specifications of the ATV02W400-HF, including voltage ratings, peak pulse current, and power dissipation. The extended operating temperature range (-65°C to 175°C) is compatible with applications requiring the original -55°C to 150°C range.

Q: What is the difference between SOD-123F and SOD-123FL packaging?

A: SOD-123F and SOD-123FL are mechanically and electrically interchangeable surface mount packages for this TVS diode category. Both are suitable for automated assembly processes and PCB footprints designed for SOD-123 family components.

Q: Is SMF40A suitable for automotive applications?

A: SMF40A is rated for general purpose applications. For automotive-grade requirements, SMF40A-T13 (Littelfuse) is the appropriate selection, as it maintains AEC-Q101 qualification equivalent to the original ATV02W400-HF.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SMF40A, SMF40A-T13, and SMF40A-TP are all ROHS3 compliant, matching the environmental compliance status of the ATV02W400-HF.

Q: What determines substitution eligibility for TVS diodes in this category?

A: Substitution is based on matching reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, power dissipation, and package type. All identified substitutes maintain these parameters within the original specification.