P6KE6.8A Alternative / Equivalent / Replacement

YINT Electronics — Transient Voltage Suppression (TVS) Diode

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1. Introduction

The P6KE6.8A is a 600W unidirectional transient voltage suppression (TVS) diode designed to protect sensitive electronic circuits from voltage transients caused by lightning, inductive load switching, and electrostatic discharge (ESD). With a stand-off voltage of 5.80V and a breakdown voltage range of 6.45V to 7.14V, the P6KE6.8A is ideal for 5V and 3.3V DC rail protection in consumer electronics, industrial control systems, telecommunications equipment, and power supply modules.

As part of the widely adopted P6KE series, the P6KE6.8A is a JEDEC-registered industry standard number, cross-compatible across virtually all major TVS diode manufacturers including Littelfuse, Vishay, ON Semiconductor, Diodes Incorporated, STMicroelectronics, Bourns, and Taiwan Semiconductor. YINT Electronics manufactures the P6KE6.8A as a high-performance, fully compatible replacement in the industry-standard DO-15 (DO-204AC) through-hole package.

The P6KE6.8A offers a fast response time of less than 1 nanosecond, ensuring that transient overvoltages are clamped before they can damage downstream components. Its 600W peak pulse power capability (10/1000µs waveform) provides robust protection for low-voltage DC power rails while maintaining a compact, low-cost through-hole footprint. Engineers seeking a P6KE6.8A replacement or P6KE6.8A alternative can confidently specify the YINT P6KE6.8A as a direct drop-in equivalent.

2. Product Overview — The P6KE Series and P6KE6.8A

The P6KE series is one of the most widely recognized TVS diode families in the electronics industry, covering breakdown voltages from 6.8V to 440V in the standard DO-15 through-hole package. Each part in the P6KE series delivers 600W of peak pulse power dissipation (10/1000µs waveform), making it suitable for a broad range of surge protection applications from low-voltage logic circuits to high-voltage industrial power systems.

The P6KE6.8A is the lowest voltage variant in the P6KE series, specifically designed for protecting 5V and 3.3V DC power rails. Its low stand-off voltage of 5.80V allows it to sit across a 5V supply line without conducting under normal conditions, yet it responds in less than 1 nanosecond when a transient overvoltage event occurs. The tight breakdown tolerance (±5% typical) ensures that design engineers can rely on consistent clamping performance without over-specifying guard bands.

YINT Electronics produces the full P6KE series including the P6KE6.8A, P6KE7.5A, P6KE8.2A, P6KE9.1A, P6KE10A, P6KE11A, P6KE12A, P6KE13A, P6KE15A, P6KE16A, P6KE18A, P6KE20A, P6KE22A, and continuing up to P6KE200A and beyond. This complete voltage coverage enables YINT customers to source all their DO-15 TVS needs from a single manufacturing partner, simplifying supply chain management and reducing qualification costs. The P6KE6.8A is manufactured using advanced silicon avalanche technology with tight process controls, ensuring consistent breakdown voltage and surge current capability across every production lot.

3. Key Features

• Peak Pulse Power: 600W — 10/1000µs waveform, sufficient for 5V/3.3V rail protection in industrial and consumer electronics
• Low Stand-off Voltage: 5.80V — Ideal for 5V DC power rails with margin for normal operating tolerances
• Tight Breakdown Voltage Range: 6.45V ~ 7.14V — Ensures consistent clamping performance across production lots
• Low Clamping Voltage: 10.50V max @ 58.10A — Minimizes stress on protected downstream components
• Fast Response Time: < 1 nanosecond — Instantaneous protection against ESD and fast transients
• High Surge Current Capability: 58.10A — 8/20µs waveform, robust against lightning-induced surges
• Wide Operating Temperature Range: -55°C to +150°C — Suitable for industrial and automotive environments
• Industry-Standard DO-15 Package — Through-hole (DO-204AC), compatible with existing PCB layouts
• Active Production Status — No obsolescence risk, stable long-term supply
• RoHS Compliant — Lead-free and environmentally friendly manufacturing

4. Surge Current Derating and Power Dissipation

The P6KE6.8A is rated for 600W peak pulse power at 25°C ambient temperature with a 10/1000µs exponential waveform. However, the peak pulse power must be derated at elevated temperatures. At 100°C ambient, the derating factor is approximately 80%, reducing the effective peak pulse power to 480W. At the maximum junction temperature of 150°C, the peak pulse power derates to near zero. This temperature derating behavior follows the standard power derating curve typical of all silicon avalanche TVS diodes.

For short-duration waveforms such as 8/20µs (commonly used for lightning surge testing per IEC 61000-4-5), the effective peak pulse power of the P6KE6.8A can exceed 1200W due to the reduced energy content per pulse. Engineers should consult the power derating curves for the specific waveform duration when calculating surge protection margins for their application. The P6KE6.8A is also rated for repetitive surges at reduced power levels, withstanding 1000 surges at 50% of rated peak pulse power without degradation.

Lead temperature during soldering must not exceed 260°C for 10 seconds, consistent with standard through-hole soldering profiles. The DO-15 package body can withstand temperatures up to 150°C during continuous operation, ensuring reliable performance even in thermally challenging environments such as enclosed power supplies or outdoor telecom enclosures.

5. Electrical Parameters

6. Cross Reference — Which Brands' P6KE6.8A Can YINT Replace?

The P6KE6.8A is a JEDEC-registered part number used by virtually all major TVS diode manufacturers worldwide. YINT Electronics' P6KE6.8A is a direct drop-in replacement with identical or tighter electrical specifications, ensuring compatibility without redesign. When searching for a P6KE6.8A equivalent, engineers can confidently select the YINT P6KE6.8A as a universal cross-reference option.

7. P6KE6.8A vs Similar TVS Diodes

When selecting a TVS diode for low-voltage protection, engineers often compare the P6KE6.8A with nearby voltage variants and alternative package options. The table below provides a side-by-side comparison to aid in selection of the best P6KE6.8A equivalent for their specific design requirements.

8. Application Circuits

8.1 5V DC Power Rail Protection

The most common application of the P6KE6.8A is protecting a 5V DC power rail from transient overvoltage. The TVS diode is connected in reverse-bias between the 5V rail and ground. Under normal operation, the P6KE6.8A presents a high impedance (leakage current less than 600µA) and does not interfere with circuit operation. When a transient voltage exceeding 6.45V (the minimum breakdown voltage) appears on the rail, the P6KE6.8A avalanches and conducts the surge current to ground, clamping the voltage to a maximum of 10.50V.

For dual-stage protection, a P6KE6.8A can be placed at the power input connector as the primary surge protector, with a smaller, lower-capacitance TVS or ESD diode placed closer to the sensitive IC for secondary protection. This cascaded approach is commonly used in telecom and industrial equipment where IEC 61000-4-5 surge immunity is required.

8.2 Microcontroller and Embedded System Protection

In embedded systems, microcontroller I/O pins and power supply inputs are vulnerable to transients coupled from external cabling and connectors. A P6KE6.8A on the 5V MCU power rail provides bulk surge protection, while additional series resistors or ferrite beads can further limit transient current into sensitive GPIO pins. The P6KE6.8A's 600W rating provides adequate margin for most industrial embedded applications. In many IoT sensor designs, the P6KE6.8A is used in conjunction with TVS diodes on communication lines to create a comprehensive protection scheme.

8.3 Telecom and Networking Equipment

In router, switch, and modem designs, the P6KE6.8A is often placed on the power input line after the DC-DC converter or voltage regulator. This protects downstream Ethernet PHY chips, SoCs, and memory devices from surges induced by lightning strikes on external cables. The through-hole DO-15 package provides reliable solder joint integrity under mechanical vibration and thermal cycling conditions typical in telecom environments. Engineers designing to Telcordia GR-1089 or ITU-T K.20 standards frequently specify the P6KE6.8A for primary protection on low-voltage supply rails.

8.4 Sensor Node and IoT Device Protection

IoT sensor nodes deployed in industrial or outdoor environments are exposed to ESD and surge threats from cabling and environmental coupling. A P6KE6.8A on the 5V sensor power bus provides robust front-end protection against lightning-induced surges and switching transients. Combined with TVS diodes on signal lines, the P6KE6.8A ensures field reliability without adding significant PCB space or cost.

9. Applications

• 5V and 3.3V DC power rail transient protection in embedded systems and microcontroller circuits
• Telecommunications equipment — RJ-45 port protection for Ethernet and PoE applications
• Industrial control systems — PLC I/O module surge protection per IEC 61000-4-5
• Consumer electronics — Set-top boxes, routers, smart home devices power input protection
• Switching power supply output — Secondary side transient clamping for flyback and forward converters
• Battery management systems (BMS) — Cell balancing and protection PCB transient suppression
• LED lighting drivers — Input surge protection for AC/DC and DC/DC LED driver circuits
• Security and surveillance equipment — Camera module and DVR power input protection
• Sensor interfaces — 5V sensor power rail protection in IoT and industrial sensor nodes
• Automotive electronics — 12V/24V system low-voltage auxiliary rail protection (non-AEC-Q101 grade)

10. Why Choose YINT for P6KE6.8A?

• 19+ Years of Manufacturing Expertise — Founded in 2006, YINT Electronics specializes in circuit protection and power semiconductor devices with 5 manufacturing and R&D bases
• 40+ Patents and Certifications — Quality-driven manufacturing with robust process control and testing per MIL-STD and JEDEC standards
• Global Sales Network — Products shipped to North America, Europe, Asia, and Latin America serving customers worldwide
• Full P6KE Series Coverage — Complete line from P6KE6.8A through P6KE440A, enabling one-stop sourcing for all voltage needs
• Direct OEM Replacement — Pin-to-pin compatible with industry-standard P6KE6.8A from all major brands, no PCB redesign required
• Active Production Status — Current production with no end-of-life concerns, ensuring long-term supply stability
• Competitive Pricing — Factory-direct pricing with volume discounts available for OEM and distribution partners
• Technical Support — Engineering team available for application assistance, cross-reference verification, and custom testing
• Sample Support — Free samples available for qualification and prototype testing; contact YINT for your application details

11. Package Dimensions — DO-15 (DO-204AC)

The DO-15 (DO-204AC) is a widely used through-hole package for TVS diodes. The P6KE6.8A uses this industry-standard package, ensuring compatibility with existing PCB layouts designed for other brands' P6KE6.8A diodes. These dimensions confirm that the YINT P6KE6.8A is a true mechanical drop-in replacement.

12. Ordering Information

13. Frequently Asked Questions (FAQ)

Q1: Is YINT P6KE6.8A a direct replacement for Littelfuse / Vishay / ON Semi P6KE6.8A?
A: Yes, absolutely. The YINT P6KE6.8A offers identical electrical parameters (5.80V Vrwm, 6.45-7.14V Vbr range, 600W PPK) in the exact same DO-15 (DO-204AC) through-hole package. It is a fully compatible drop-in P6KE6.8A replacement requiring no PCB redesign, BOM update, or requalification cycle.

Q2: What is the difference between P6KE6.8A and P6KE6.8CA?
A: P6KE6.8A is a unidirectional device (single avalanche diode for DC circuits where transients are always of one polarity). P6KE6.8CA is a bidirectional device (two back-to-back avalanche diodes for AC signal lines where transients can be positive or negative). For DC power rail protection, the P6KE6.8A (unidirectional) is the correct choice.

Q3: What is the peak pulse power rating of the P6KE6.8A under different waveform conditions?
A: 600W for the standard 10/1000µs exponential waveform at 25°C. For shorter duration waveforms such as 8/20µs (IEC 61000-4-5 combination wave), the effective peak power capability can exceed 1200W due to reduced energy per pulse. Power must be linearly derated at temperatures above 25°C — at 100°C ambient, the effective rating is approximately 480W.

Q4: What voltage DC rails can the P6KE6.8A protect?
A: The P6KE6.8A is primarily designed for 5V DC power rails with a stand-off voltage of 5.80V. It can also be used on 3.3V rails with generous safety margin (3.3V operating voltage is well below the 5.80V Vrwm threshold). For unregulated 5V buses that may rise to 5.5V or 5.8V under light load conditions, the P6KE6.8A's Vrwm of 5.80V provides adequate margin.

Q5: What is the maximum clamping voltage of P6KE6.8A, and how does it vary with surge current?
A: The maximum clamping voltage is 10.50V at the peak pulse current of 58.10A (10/1000µs waveform). At lower surge currents typical of ESD events (approximately 30A peak with sub-microsecond duration), the actual clamping voltage will be significantly lower — typically in the range of 8.0V to 9.5V depending on the specific transient waveform and current level.

Q6: What is the response time of P6KE6.8A?
A: Less than 1 nanosecond (typically 0.5ns to 0.8ns). This ultra-fast avalanche response ensures that transient overvoltages are clamped before they reach levels that could damage sensitive CMOS ICs, microcontrollers, memory devices, and communication controllers.

Q7: Can P6KE6.8A be used for ESD protection in addition to surge protection?
A: Yes. While the P6KE6.8A is primarily designed and rated for surge protection per IEC 61000-4-5 (lightning surge), its sub-nanosecond response time also makes it effective for ESD protection per IEC 61000-4-2 (±15kV air discharge, ±8kV contact discharge). This dual capability is particularly valuable in industrial and telecom applications where both surge and ESD threats are present on the same power input lines.

Q8: What is the difference between P6KE6.8A and SMF5.0A — how should I choose?
A: The SMF5.0A is a 200W surface-mount TVS diode in the ultra-compact SOD-123FL package, while the P6KE6.8A offers 600W peak pulse power in a through-hole DO-15 package. The P6KE6.8A provides 3× higher surge current capability (58.10A vs 21.70A) and 3× higher power handling at the expense of larger physical size. Choose P6KE6.8A when through-hole assembly and maximum surge protection are required; choose SMF5.0A for compact surface-mount designs where PCB space is at a premium.

Q9: What is the reverse leakage current of P6KE6.8A at different temperatures?
A: The maximum reverse leakage current is 600µA at Vrwm = 5.80V and room temperature (25°C). At 85°C ambient, the leakage current increases to approximately 3-5mA due to the exponential temperature dependence of silicon junction leakage. At 125°C, leakage can reach 10-15mA. These values are typical for 600W TVS diodes and should be considered in high-temperature, low-standby-power designs.

Q10: Does YINT provide free samples of P6KE6.8A for engineering testing and qualification?
A: Yes, sample support is available for qualified engineering projects. Contact YINT Electronics at global@yint.com.cn with your application details, required quantity, and delivery timeline. Sample requests are typically processed and shipped within 3-5 business days.

Q11: Is the P6KE6.8A qualified to AEC-Q101 automotive reliability standard?
A: The standard commercial-grade P6KE6.8A is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101 certification (under IATF 16949 quality management), please contact YINT to discuss available automotive-grade TVS alternatives that meet your specific reliability requirements.

Q12: What is the operating junction temperature range of P6KE6.8A?
A: The operating junction temperature range is -55°C to +150°C. The storage temperature range is identical at -55°C to +150°C. This wide temperature range makes the P6KE6.8A suitable for harsh industrial environments, outdoor telecom equipment, and unconditioned equipment enclosures. For the complete datasheet including temperature derating curves, please contact YINT.

Q13: What is the junction capacitance of P6KE6.8A and does it affect circuit operation?
A: The P6KE6.8A has a typical junction capacitance of approximately 150pF to 200pF at zero bias voltage. This capacitance is negligible for DC power rail protection applications but is too high for direct use on high-speed data lines. For signal line protection, use dedicated low-capacitance ESD protection diodes such as the ESD24VD3 series.

Q14: Can P6KE6.8A be used in battery-powered or IoT devices?
A: Yes, with careful consideration. The P6KE6.8A's 600µA maximum leakage current at rated Vrwm is acceptable for many 5V battery-powered devices where the protection circuit is not the dominant power consumer. For ultra-low-power IoT devices operating in the microamp range, consider a lower-leakage alternative or ensure the TVS is placed after a switching regulator that isolates it during standby.

Q15: What are the recommended hand-soldering and wave-soldering profiles for the DO-15 package?
A: For hand soldering: 350°C iron tip temperature, 3-5 seconds maximum per joint. For wave soldering: preheat 100-130°C, solder pot at 260°C ±5°C, 2-5 second dwell time. Peak lead temperature must not exceed 260°C for more than 10 seconds per J-STD-020.

Q16: Where can I download the complete P6KE6.8A datasheet with all technical curves?
A: For the complete datasheet including power derating curves, clamping voltage vs. peak pulse current characteristics, thermal impedance graphs, and detailed application notes, please contact YINT Electronics at global@yint.com.cn. Our engineering team will provide the full technical documentation package.

14. Conclusion

YINT Electronics' P6KE6.8A TVS diode offers a reliable, high-performance, and cost-effective alternative to industry-standard P6KE6.8A diodes from Littelfuse, Vishay, ON Semiconductor, Diodes Incorporated, STMicroelectronics, Bourns, and other leading global manufacturers. Delivering 600W peak pulse power in the standard DO-15 through-hole package with a tightly controlled breakdown voltage range of 6.45V to 7.14V and a low clamping voltage of just 10.50V at peak pulse current, the YINT P6KE6.8A provides robust, dependable transient protection for 5V and 3.3V DC power rails across a wide spectrum of industrial, telecom, consumer, and IoT applications.

Whether you require a direct P6KE6.8A replacement for an existing high-volume production design, a reliable P6KE6.8A equivalent from a vertically integrated manufacturer with 19+ years of proven experience, or expert application engineering guidance on selecting the optimal TVS diode for your specific transient protection requirements, YINT Electronics is fully equipped to support your project from initial concept through volume manufacturing. With active production status, factory-direct competitive pricing, graduated volume discounts, and responsive technical support from our in-house engineering team, the YINT P6KE6.8A is an excellent choice for design engineers seeking to optimize BOM costs, simplify supply chains, and ensure long-term component availability without compromising on quality or reliability.

For engineers working on designs that require surface-mount TVS alternatives, YINT also offers equivalent solutions such as the SMF5.0A (200W SOD123FL), ESD24VD3 (350W SOD323 ESD protection diode), and the SMAJ5.0A (400W SMA), SMBJ5.0A (600W SMB) series for space-constrained PCB applications requiring surface-mount assembly.

For complete datasheets, free engineering samples, volume pricing quotations, or technical design-in assistance, please contact YINT Electronics at global@yint.com.cn. Our dedicated engineering team is available to assist with cross-reference verification, application circuit design review, prototype testing support, and production qualification assistance.