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HomeProductsCircuit ProtectionTVS - DiodesATV02W540-HF
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ATV02W540-HF - Comchip Technology

Manufacturer Part Number
ATV02W540-HF
Manufacturer
Comchip Technology
Allelco Part Number
98D-ATV02W540-HF
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
48,702 pcs available, New & Original
Parts Description
TVS DIODE 54VWM 87.1VC SOD123
Package
SOD-123F
Data sheet
ATV02W540-HF.pdf

PCN Packaging

2.73KHz.pdf

Environmental Information

Cylindrical Battery Holders.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 48702
  • Unit Price: $0.149
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.149 $0.15
200+ $0.058 $11.60
500+ $0.056 $28.00
1000+ $0.055 $55.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

ATV02W540-HF Tech Specifications
Comchip Technology - ATV02W540-HF technical specifications, attributes, parameters and parts with similar specifications to Comchip Technology - ATV02W540-HF

Product Attribute Attribute Value
Manufacturer Comchip Technology
Voltage - Reverse Standoff (Typ) 54V
Voltage - Clamping (Max) @ Ipp 87.1V
Voltage - Breakdown (Min) 60V
Unidirectional Channels 1
Type Zener
Supplier Device Package SOD-123F
Series Automotive, AEC-Q101
Power Line Protection No
Product Attribute Attribute Value
Power - Peak Pulse 200W
Package / Case SOD-123F
Package Tape & Reel (TR)
Operating Temperature -55°C ~ 150°C (TJ)
Mounting Type Surface Mount
Current - Peak Pulse (10/1000µs) 2.3A
Capacitance @ Frequency -
Base Product Number ATV02W540
Applications Automotive

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8541.10.0080

Frequently Asked Questions(FAQ)

What are the key design considerations when selecting the ATV02W540-HF for transient voltage protection in automotive applications?
The ATV02W540-HF is qualified to AEC-Q101 and rated for junction temperatures from -55°C to 150°C, making it suitable for harsh automotive environments. Its 54V reverse standoff voltage allows it to protect downstream circuits from transients on 48V bus systems, common in modern vehicle architectures. With a clamping voltage of 87.1V at 2.3A peak pulse current (10/1000µs waveform), it limits overvoltage events to a level that downstream semiconductors can tolerate. Designers must ensure that the protected circuitry operates below 87.1V during transient events and that the 200W peak pulse power rating is not exceeded under expected surge conditions.
How does the ATV02W540-HF compare to the SMF54A-TP in terms of clamping performance and thermal behavior?
Both the ATV02W540-HF and SMF54A-TP share nearly identical electrical characteristics, including a 54V reverse standoff and 87.1V clamping voltage at 2.3A. However, the ATV02W540-HF is specified for a broader operating temperature range (-55°C to 150°C) and carries AEC-Q101 qualification, which the SMF54A-TP may not fully support depending on the manufacturer. In high-temperature automotive applications, the ATV02W540-HF’s thermal stability and reliability under sustained elevated temperatures provide a measurable advantage in long-term field performance.
Can the ATV02W540-HF be used for bidirectional transient suppression, or is it strictly unidirectional?
The ATV02W540-HF is a unidirectional TVS diode with a single channel, designed to suppress positive-going transients relative to ground. It is not suitable for bidirectional clamping unless paired with a second device in an opposing configuration. For applications involving AC lines or differential signals where both polarities of surge may occur, a bidirectional TVS array or a dual-diode setup would be required. The unidirectional nature ensures lower capacitance and tighter control over forward conduction characteristics during negative transients.
What is the significance of the 2.3A peak pulse current rating, and how should it inform system-level surge protection design?
The 2.3A rating (10/1000µs waveform) indicates the maximum current the ATV02W540-HF can safely conduct during a standardized transient event without degradation. This value corresponds to a 200W peak power dissipation (87.1V × 2.3A). In practice, this means the device can handle moderate surge events such as load dump in automotive systems, but may require additional current-limiting circuitry (e.g., series resistors or inductors) for higher-energy transients. Designers should verify that expected surge currents in the application do not exceed 2.3A at the clamping voltage to prevent device failure.
How does the SOD-123F package impact thermal management and board layout for the ATV02W540-HF?
The SOD-123F package offers a compact surface-mount footprint with improved thermal performance over standard SOD-123 due to enhanced leadframe design and better heat dissipation to the PCB. However, its small size limits natural convection cooling, so thermal vias and copper pour under the cathode pad are recommended to improve heat spreading. In high-repetition-rate transient scenarios, even with 200W peak power, average power dissipation remains low, but localized heating during pulses necessitates careful layout to avoid thermal coupling with sensitive analog components.
Is the ATV02W540-HF suitable for protecting 48V power systems in electric vehicles, and what derating considerations apply?
Yes, the ATV02W540-HF is well-suited for 48V systems, as its 54V reverse standoff voltage provides a 6V margin above nominal bus voltage, allowing for normal voltage fluctuations while remaining off during steady-state operation. The 60V minimum breakdown voltage ensures activation only during overvoltage events. Derating is minimal due to the wide temperature range, but at 150°C junction temperature, leakage current increases—typically in the microamp range—which may affect ultra-low-power circuits. Designers should account for this in high-impedance signal paths.
How does the ATV02W540-HF perform in repetitive surge conditions compared to similar 54V TVS diodes?
While the ATV02W540-HF is rated for a single 10/1000µs pulse at 2.3A, its ability to withstand repetitive surges depends on duty cycle, pulse spacing, and thermal mass of the PCB. Unlike some competing devices with higher thermal mass or integrated heat spreaders, the SOD-123F package has limited energy absorption capacity over rapid successive pulses. For applications with frequent transients—such as inductive load switching—thermal modeling or derating based on pulse repetition rate is advised to prevent cumulative heating and premature failure.
What are the implications of the MSL 1 rating for the ATV02W540-HF in high-volume manufacturing?
The MSL 1 (Unlimited) rating means the ATV02W540-HF can be exposed to ambient conditions indefinitely without requiring dry packing or bake-out procedures prior to reflow soldering. This simplifies logistics and reduces handling costs in automotive production environments, where moisture-sensitive components often require controlled storage. It also minimizes the risk of popcorning during reflow, enhancing yield and reliability in high-volume surface-mount assembly lines.
Can the ATV02W540-HF replace the SMF54A in existing designs without circuit modifications?
The ATV02W540-HF is electrically and mechanically compatible with the SMF54A in most cases, sharing the same SOD-123F footprint and similar voltage-current characteristics. However, the ATV02W540-HF offers AEC-Q101 qualification and a wider operating temperature range, making it a more robust choice for automotive or industrial upgrades. No circuit modifications are typically needed, but validation under end-use surge conditions is recommended to confirm clamping behavior matches system-level protection requirements.
How does the unidirectional nature of the ATV02W540-HF affect its use in ground-referenced transient events?
As a unidirectional device, the ATV02W540-HF conducts during positive transients (voltage exceeding 60V) but blocks negative surges. For negative transients, it behaves like a standard PN junction, clamping at approximately -1V to -1.5V forward voltage. This makes it effective for protecting circuits where the reference is system ground and transients are predominantly positive, such as load dump or inductive kickback. However, in systems exposed to bipolar transients, additional protection (e.g., a series diode or bidirectional TVS) may be necessary to prevent reverse overstress.
What role does the 87.1V clamping voltage play in selecting downstream components?
The 87.1V clamping voltage sets the maximum voltage that will appear across the protected circuit during a 2.3A transient. Downstream components—such as microcontrollers, power regulators, or communication ICs—must have absolute maximum ratings exceeding this value with appropriate margin. For example, a 100V-rated MOSFET or IC would be acceptable, but an 80V-rated device would risk failure. This parameter is critical in defining the voltage budget for the entire protection network and influences the selection of isolation, filtering, and power stage components.
Why is the ATV02W540-HF specified with a 200W peak pulse power rating, and how is this value derived?
The 200W rating is derived from the product of the maximum clamping voltage (87.1V) and peak pulse current (2.3A) under the 10/1000µs test waveform. This value represents the instantaneous power the ATV02W540-HF can absorb during a single transient event. It is not a continuous power rating but a measure of surge energy handling capability. Designers use this parameter to compare against expected transient energy in the system, ensuring the device can survive worst-case surges without degradation or failure.
How does the ATV02W540-HF support compliance with automotive EMC standards such as ISO 7637-2?
The ATV02W540-HF is designed to mitigate high-energy transients defined in ISO 7637-2, particularly Test Pulse 5a (load dump), which can reach 87V with high source impedance. Its 54V standoff and 87.1V clamping align closely with the requirements for protecting 48V systems against such pulses. When placed close to the protected load with minimal trace inductance, the ATV02W540-HF limits voltage overshoot effectively, aiding system-level compliance. However, full compliance also depends on system architecture, grounding, and additional filtering.
What are the trade-offs between using the ATV02W540-HF and a higher-power TVS diode in a space-constrained design?
The ATV02W540-HF offers a compact SOD-123F footprint ideal for space-limited PCBs, but its 200W peak power and 2.3A current limits are lower than those of larger packages like SMA or SMB. In high-energy applications, this may necessitate additional protection stages or current-limiting components. Conversely, for moderate transients in 48V automotive auxiliary systems, the ATV02W540-HF provides sufficient protection with minimal board area, reducing overall solution size and cost while maintaining AEC-Q101 reliability.
How does the absence of specified capacitance affect high-speed signal line protection with the ATV02W540-HF?
While capacitance is not specified for the ATV02W540-HF, typical unidirectional TVS diodes in this voltage range exhibit capacitance in the low picofarad range (often <10pF). This makes the device suitable for protecting low- to moderate-speed signal lines, such as CAN or LIN buses, where capacitive loading must be minimized. However, for high-speed interfaces like Ethernet or USB, even small capacitance can distort signal integrity. In such cases, low-capacitance TVS arrays or steering diode-based protectors may be preferred despite the ATV02W540-HF’s robust surge performance.

Parts with Similar Specifications

The three parts on the right have similar specifications to Comchip Technology ATV02W540-HF

Product Attribute ATV02W540B-HF ATV02W510-HF ATV02W430-HF ATV02W400B-HF
Part Number ATV02W540B-HF ATV02W510-HF ATV02W430-HF ATV02W400B-HF
Manufacturer Comchip Technology Comchip Technology Comchip Technology Comchip Technology
Type - - - -
Power Line Protection - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Series - - - -
Voltage - Breakdown (Min) - - - -
Unidirectional Channels - - - -
Voltage - Clamping (Max) @ Ipp - - - -
Power - Peak Pulse - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Reverse Standoff (Typ) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Applications - - - -
Current - Peak Pulse (10/1000µs) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Capacitance @ Frequency - - - -

ATV02W540-HF Datasheet PDF

Download ATV02W540-HF pdf datasheets and Comchip Technology documentation for ATV02W540-HF - Comchip Technology.

Datasheets
Cylindrical Battery Holders.pdf
PCN Packaging
2.73KHz.pdf
Environmental Information
Cylindrical Battery Holders.pdf

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ATV02W540-HF Image

ATV02W540-HF

Comchip Technology
98D-ATV02W540-HF

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