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HomeProductsCircuit ProtectionTVS - DiodesP4KE7.5A-G
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P4KE7.5A-G - Comchip Technology

Manufacturer Part Number
P4KE7.5A-G
Manufacturer
Comchip Technology
Allelco Part Number
98D-P4KE7.5A-G
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
42,700 pcs available, New & Original
Parts Description
TVS DIODE 6.4VWM 11.3VC DO41
Package
DO-41
Data sheet
P4KE7.5A-G.pdf

Datasheets

P4KE-G Series.pdf

Environmental Information

Comchip Technology RoHS Cert.pdf
RoHs Status
ROHS3 Compliant
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In stock: 42700
  • Unit Price: $0.115
  • Subtotal: $0.00

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Specifications

P4KE7.5A-G Tech Specifications
Comchip Technology - P4KE7.5A-G technical specifications, attributes, parameters and parts with similar specifications to Comchip Technology - P4KE7.5A-G

Product Attribute Attribute Value
Manufacturer Comchip Technology
Voltage - Reverse Standoff (Typ) 6.4V
Voltage - Clamping (Max) @ Ipp 11.3V
Voltage - Breakdown (Min) 7.13V
Unidirectional Channels 1
Type Zener
Supplier Device Package DO-41
Series -
Power Line Protection No
Product Attribute Attribute Value
Power - Peak Pulse 400W
Package / Case DO-204AL, DO-41, Axial
Package Bulk
Operating Temperature -55°C ~ 150°C (TJ)
Mounting Type Through Hole
Current - Peak Pulse (10/1000µs) 35.4A
Capacitance @ Frequency -
Base Product Number P4KE7.5
Applications General Purpose

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)

How does the P4KE7.5A-G compare to other TVS diodes in terms of peak pulse current handling under transient events, and what design considerations should be made when selecting a device for 12V automotive signal lines?
The P4KE7.5A-G is rated for a peak pulse current of 35.4A with an 8/20µs waveform, which is typical for surge protection in automotive applications such as ISO 7637-2 compliant circuits. This level of current handling makes it suitable for protecting low-capacitance signal lines like LIN or CAN bus interfaces, where clamping must occur rapidly without damaging sensitive transceivers. When evaluating alternatives, designers must consider not only peak current but also clamping voltage—here at 11.3V for a 6.4V standoff—to ensure compatibility with downstream logic thresholds. For 12V systems, the P4KE7.5A-G offers adequate margin above the nominal supply while limiting overvoltage to below common microcontroller input tolerances.
What are the implications of using the P4KE7.5A-G in a bidirectional protection scenario, and how can its unidirectional nature affect circuit performance in differential signaling environments?
The P4KE7.5A-G is designed as a unidirectional TVS diode with a Zener-type breakdown characteristic, meaning it primarily clamps positive-going transients relative to ground. In bidirectional communication lines such as RS-485 or USB, this limitation necessitates pairing with a second device (e.g., another P4KE7.5A-G reversed) or using a dual-directional TVS array to protect against transients in both polarities. Using only one unidirectional device risks inadequate protection during negative transients, potentially leading to undetected failures. Therefore, system-level robustness requires careful attention to polarity coverage, especially in environments with high electromagnetic interference or inductive kickback from long cable runs.
Given its 400W peak pulse power rating and 11.3V clamping voltage, what is the approximate energy absorption capacity of the P4KE7.5A-G per pulse, and how does this influence reliability in repeated transient exposure scenarios?
With a peak pulse current of 35.4A and clamping voltage of 11.3V, the P4KE7.5A-G delivers a peak power of 400W, consistent with its datasheet specification. Energy absorption is calculated as E = V × I × t, where t is the duration of the transient. For an 8/20µs waveform, this represents approximately 1.4 joules per pulse. However, repeated pulses near this energy level can degrade junction integrity over time, even if individual pulses are within rating. Thermal cycling and cumulative stress may reduce long-term reliability unless derating is applied—typically limiting continuous operation to no more than 10–20% of rated peak power under real-world conditions.
Can the P4KE7.5A-G safely protect a 5V logic input line in a mixed-voltage system where occasional 12V signals might be present due to miswiring?
While the P4KE7.5A-G has a reverse standoff voltage of 6.4V and breakdown of 7.13V, clamping at 11.3V exceeds most 5V logic ICs’ absolute maximum ratings (typically 6.0V). Applying this device directly to a 5V rail without additional buffering could result in damage during a transient event. Instead, it should be placed on higher-voltage rails or used in conjunction with a voltage regulator or level-shifter to ensure clamped voltages remain within safe limits. Alternatively, a lower-clamp-voltage TVS (e.g., with a 9–10V clamping threshold) would be more appropriate for 5V protection applications.
How does the DO-41 package of the P4KE7.5A-G impact thermal performance and mounting options compared to surface-mount equivalents like SOD-123FL?
The axial DO-41 package provides good solder joint reliability and ease of manual assembly but offers limited heat dissipation due to its through-hole form factor and smaller surface area compared to modern SMD packages. While capable of handling short-duration pulses up to 400W, sustained energy dissipation may require careful layout and airflow considerations. Surface-mount versions allow closer placement to protected circuitry and better integration into automated PCB manufacturing. For space-constrained designs, a compact SMD TVS with similar electrical characteristics might offer superior thermal management and board density despite requiring reflow soldering.
What is the significance of the 7.13V breakdown voltage in relation to the 6.4V standoff, and why is there a minimum difference between these values for proper TVS operation?
The 6.4V reverse standoff voltage indicates the maximum DC voltage the P4KE7.5A-G can tolerate without significant leakage, while the 7.13V minimum breakdown voltage defines the point at which avalanche multiplication initiates under reverse bias. This ~0.73V margin ensures minimal leakage current under normal operating conditions and prevents premature conduction before a transient occurs. A sufficient gap between standoff and breakdown improves noise immunity and stability; too small a difference increases susceptibility to false triggering from EMI or power supply ripple.
In what types of industrial control environments would the P4KE7.5A-G be most effectively deployed, considering its temperature range and power rating?
The P4KE7.5A-G operates reliably from -55°C to 150°C junction temperature, making it suitable for harsh industrial settings such as motor drives, sensor networks, and fieldbus communications where ambient temperatures fluctuate widely. Its 400W peak pulse capability supports protection against electrostatic discharge (ESD), electrical fast transients (EFT), and surges from inductive loads—common in relay coils, solenoids, and variable frequency drives. Through-hole mounting enhances mechanical resilience in vibration-prone installations, though care must be taken to manage thermal resistance through adequate copper pours or heatsinking if multiple pulses occur in rapid succession.
How does the absence of capacitance specification in the P4KE7.5A-G affect high-speed data line protection, and what alternative devices should be considered for Gigabit Ethernet PHY interfaces?
Unlike specialized TVS arrays designed for high-speed signals, the P4KE7.5A-G lacks specified capacitance, implying relatively higher parasitic capacitance that could distort fast edges on high-bandwidth lines. This limits its suitability for Gigabit Ethernet or USB 3.0 applications where signal integrity is critical. In such cases, ultra-low-capacitance TVS diodes (e.g., <0.5pF) or integrated ESD protection ICs are preferred. For slower serial protocols like SPI or UART, the P4KE7.5A-G remains viable provided impedance matching and rise-time preservation are verified empirically or via simulation.
Can two P4KE7.5A-G devices in series provide enhanced overvoltage protection for a 12V automotive battery line?
Series connection of identical P4KE7.5A-G diodes is generally not recommended due to mismatched turn-on characteristics between individual units, leading to uneven current sharing and potential early failure of one device. Additionally, each diode introduces forward voltage drop (~0.7V) when conducting, which complicates clamping behavior. For battery-line protection requiring higher standoff, a dedicated bidirectional TVS array or fuse-based crowbar circuit would be more reliable. The P4KE7.5A-G remains best suited for signal-level or low-power rail protection rather than primary battery surge suppression.
What role does the Moisture Sensitivity Level (MSL) of 1 play in the manufacturing and storage lifecycle of the P4KE7.5A-G, and how does this compare to lead-free assembly requirements?
With an MSL of 1, the P4KE7.5A-G is not sensitive to moisture absorption and does not require baking prior to reflow soldering, simplifying inventory management and reducing handling costs. This aligns well with standard lead-free reflow profiles used in modern PCB assembly, as there is no risk of popcorning during thermal exposure. Combined with RoHS3 compliance, the component supports global manufacturing standards without special precautions, making it ideal for high-volume production environments with strict environmental regulations.
Why might a designer choose the bulk packaging format for the P4KE7.5A-G instead of tape-and-reel, and what are the logistical implications for prototyping versus mass production?
Bulk packaging reduces per-unit cost and minimizes waste during initial design validation phases where low volumes are typical. It also allows easier manual handling and visual inspection during prototype builds. However, for automated assembly lines, tape-and-reel offers faster feeding rates and reduced jamming risks. The choice depends on volume forecasts: bulk suits low-to-medium quantity development, while reel is preferred for scaling. Suppliers often offer both formats for the same part number, so procurement planning must match production strategy.
Does the P4KE7.5A-G support fail-safe operation under sustained overvoltage conditions, and what secondary protection mechanisms should accompany it in safety-critical systems?
As a passive clamping device, the P4KE7.5A-G does not actively disconnect the circuit during prolonged overvoltage events. Once triggered, it continues to conduct until the transient ends or internal degradation occurs. In safety-critical applications (e.g., medical devices or automotive functional safety), this necessitates complementary protections such as polyfuses, resettable thermistors, or voltage monitors to isolate faults. Redundancy and fault detection logic should be implemented alongside the TVS to meet standards like IEC 61508 or ISO 26262.
How does the unidirectional nature of the P4KE7.5A-G influence its response time compared to bidirectional arrays, and what impact does this have on transient capture efficiency?
Response time for the P4KE7.5A-G is typically sub-nanosecond, meeting requirements for most ESD and EFT events. However, because it responds only to transients in one polarity, it misses half of all possible threats in bidirectional systems. Bidirectional arrays use symmetrical structures that activate regardless of polarity, doubling effective coverage without sacrificing speed. Thus, although the P4KE7.5A-G reacts faster than mechanical switches, its directional limitation reduces overall system resilience unless supplemented appropriately.
What substitution options exist for the P4KE7.5A-G, and how do alternatives like the Littelfuse SP3022 or ON Semiconductor PTVS0603 differ in key performance parameters?
Direct substitutes include the P4KE7.5A (identical except possibly packaging variation), but broader alternatives span manufacturers. For example, the Littelfuse SP3022 offers similar 7.5V standoff and 14V clamping but in an SMA footprint with lower peak pulse current (24A vs. 35.4A), making it less robust for high-energy surges. The ON Semiconductor PTVS0603 is a miniature surface-mount variant with comparable electrical specs but optimized for space-constrained, high-frequency applications. Selection hinges on trade-offs between size, power handling, and compatibility with existing layouts.
Is the P4KE7.5A-G suitable for protecting I²C bus lines running at 400kHz, given its lack of specified propagation delay?
Yes, the P4KE7.5A-G is generally acceptable for I²C protection at 400kHz, as the protocol’s slow edge rates (microsecond-scale) are unaffected by the TVS’s nanosecond response time. Since the device clamps rapidly and introduces negligible latency, it preserves timing margins. However, designers should verify that total capacitance (including PCB parasitics) remains below 400pF to avoid signal distortion. If higher speeds (e.g., 3.4MHz in Fast Mode Plus) are targeted, ultra-low-capacitance variants become essential, but for standard I²C, the P4KE7.5A-G performs adequately.
How does the absence of Power Line Protection designation affect the P4KE7.5A-G’s suitability for AC mains or DC bus applications?
The lack of "Power Line Protection" labeling indicates the P4KE7.5A-G is not intended for direct connection to AC mains or high-energy DC buses where sustained surges exceed its 400W pulse rating. Such applications demand specialized devices with reinforced insulation, higher energy ratings (>1kW), and compliance with safety standards like UL 1449. The P4KE7.5A-G remains confined to auxiliary circuits, sensor inputs, and communication lines where transient energy is limited to ESD or brief switching spikes.
What considerations apply when integrating the P4KE7.5A-G into a PCB layout to minimize inductance and maximize surge response effectiveness?
To optimize performance, place the P4KE7.5A-G as close as possible to the protected pin, with short, wide traces connecting to ground and the signal line. Minimize loop area between the diode’s leads and the PCB plane to reduce parasitic inductance (<1nH is desirable), which otherwise slows response and elevates local voltage during fast transients. Use solid ground planes and avoid routing sensitive traces near the diode’s leads. These practices ensure the clamping action begins before damaging voltages propagate along the interconnect.
How does the RoHS3 and REACH status of the P4KE7.5A-G influence global market access, particularly in Europe and North America?
RoHS3 compliance confirms the absence of restricted substances beyond standard RoHS limits, including stricter controls on phthalates, making the P4KE7.5A-G eligible for sale in EU markets without further testing. REACH Unaffected status indicates no SVHCs (Substances of Very High Concern) exceed 0.1% weight, avoiding complex registration obligations. Together, these certifications streamline supply chain approvals in Europe, Canada, and other regulated regions, reducing legal and documentation overhead for OEMs deploying the device in consumer, industrial, or automotive electronics.

Parts with Similar Specifications

The three parts on the right have similar specifications to Comchip Technology P4KE7.5A-G

Product Attribute P4KE7.5AHB0G P4KE7.5A-B P4KE7.5A R0G P4KE7.5A-E3/53
Part Number P4KE7.5AHB0G P4KE7.5A-B P4KE7.5A R0G P4KE7.5A-E3/53
Manufacturer TSC (Taiwan Semiconductor) Littelfuse Inc. TSC (Taiwan Semiconductor) Vishay General Semiconductor - Diodes Division
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Current - Peak Pulse (10/1000µs) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Applications - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Voltage - Breakdown (Min) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Mounting Type - Surface Mount Through Hole Surface Mount
Type - - - -
Power Line Protection - - - -
Series - - - -
Unidirectional Channels - - - -
Power - Peak Pulse - - - -
Voltage - Reverse Standoff (Typ) - - - -
Capacitance @ Frequency - - - -
Voltage - Clamping (Max) @ Ipp - - - -

P4KE7.5A-G Datasheet PDF

Download P4KE7.5A-G pdf datasheets and Comchip Technology documentation for P4KE7.5A-G - Comchip Technology.

Datasheets
P4KE-G Series.pdf
PCN Packaging
Label D/C Chg 24/Mar/2016.pdf
Environmental Information
Comchip Technology RoHS Cert.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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P4KE7.5A-G Image

P4KE7.5A-G

Comchip Technology
98D-P4KE7.5A-G

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