P6KE6.8CA Littelfuse P6KE6.8CA – Bidirectional 600W Transient Voltage Suppressor TVS Diode Through Hole DO-204AC (DO-15)

Littelfuse P6KE6.8CA – Industrial-Grade Surge Protection Against Lightning Strikes, ESD (30kV), and EFT Transients Up to 57A Pulse Current

The Littelfuse P6KE6.8CA stands as an unyielding sentinel in the realm of circuit protection, its axial-leaded, bidirectional design forming an impenetrable barrier against nature’s most violent electrical outbursts. Picture this robustTVS diode as a microscopic lightning rod meticulously engineered to absorb and deflect devastating voltage surges before they can ravage your sensitive electronics.

When furious thunderstorms rage overhead, unleashing their fury through power lines, the P6KE6.8CA stands ready to intercept lightning-induced transients that would otherwise fry unprotected circuits. Its glass-passivated junction doesn’t merely resist these massive energy spikes – it positively engulfs them, reliably clamping voltages to a safe 10.5V ceiling even when confronted with terrifying 57A surge currents. The diode’s phenomenally fast sub-picosecond response time acts like a hypervigilant bodyguard, reacting to dangers faster than most circuits can even detect them.

But the threats don’t stop at weather phenomena. In modern electronics labs and production floors where electrostatic discharges lurk around every corner, thisTVS diode provides military-grade protection against catastrophicESD strikes up to 30kV – whether from accidental human contact or rogue equipment discharges. Its bidirectional functionality creates a symmetrical defense system, equally adept at neutralizing both positive and negative transient threats that could otherwise accumulate and overwhelm sensitive components.

The P6KE6.8CA truly shines in harsh industrial environments where electrical fast transients constantly assault control systems. Imagine the electrical chaos created by massive motor starters, relay banks, and heavy machinery – all generating rapid-fire voltage spikes that would cripple lesser protection devices. Here, Littelfuse’s engineering mastery creates an oasis of stability, maintaining protection across a staggering temperature range from Arctic -55°C to blistering +150°C conditions.

At the heart of its protection magic lies an optimal 5.8V standoff voltage, positioning it as the ideal guardian angel for today’s ubiquitous 5V and 3.3V logic families. Whether shielding delicate microcontroller inputs, preserving signal integrity on communication buses, or preventing catastrophic failures in power management ICs, the P6KE6.8CA operates with surgical precision – remaining invisible to the system during normal operation yet springing into action with lightning reflexes when danger appears.

The diode’s 600W peak pulse power capability tells the story of its sheer brute strength – this isn’t some delicate protection scheme, but rather a heavy-duty voltage suppressor built to withstand repeated assaults while maintaining its protective characteristics over decades of service. Engineers can specify it with confidence knowing it won’t degrade after absorbing multiple transient events like lesser suppression devices might.

Visualize thisTVS diode as the ultimate electronic goalkeeper – always positioned correctly thanks to its precise standoff voltage, reacting with superhuman speed to sudden threats, and possessing the strength to stop even the most powerful electrical shots dead in their tracks. It’s this combination of precision, speed and power that makes the P6KE6.8CA a trusted protector across industries ranging from automotive to industrial automation to sensitive medical electronics.

The Littelfuse P6KE6.8CA is an axial-leaded bidirectional TVS diode designed to protect sensitive electronics from voltage transients induced by:

• Lightning strikes (IEC 61000-4-5)
• Electrostatic discharge (ESD) (30kV air/contact per IEC 61000-4-2)
• Electrical fast transients (EFT) (IEC 61000-4-4)

With 600W peak pulse power (10/1000µs waveform) and ultra-fast response <1.0ps, it clamps transient voltages to 10.5V maximum at 57A surge current. The 5.8V standoff voltage makes it perfect for 5V/3.3V bus protection in harsh environments (–55°C to +150°C).

Key Features

⚡ Bidirectional Clamping: Guards against both positive and negative transients.
⚡ Low Clamping Ratio: Vc/Vbr = 1.63 for superior energy absorption.
⚡ Glass-Passivated Junction: Enhanced reliability vs epoxy-coated competitors.

Specifications

Applications

1. Industrial Automation

• PLC I/O Modules: Protects RS-485/RS-422 interfaces from inductive load transients.
• Motor Drives: Suppresses voltage spikes from relay/contactor switching (>10kV).
• Sensors: Shields 4-20mA loops in oil/gas pipelines against lightning-induced surges.

2. Automotive Electronics

• ECUs: Safeguards CAN bus lines (ISO 7637-2 compliance).
• EV Chargers: Mitigates load dump transients up to 57A.
• Infotainment: ESD protection for USB/LVDS interfaces.

3. Consumer & IoT

• Smart Home Hubs: Meets IEC 61000-4-5 for AC line surges.
• Wi-Fi Routers: Filters EFT noise on PoE ports.
• Gaming Consoles: Prevents HDMI port damage from ESD.

4. Power Supplies

• DC-DC Converters: Clamps switch-node ringing (>20V/µs slew rates).
• Solar Charge Controllers: Protects MPPT inputs from PV panel surges.

Technical Deep Dive

Clamping Performance

The P6KE6.8CA’s dynamic resistance (~1Ω) ensures minimal overshoot during surges:

• 6.45V breakdown → 10.5V clamped at 57A (per Fig. 1 I-V curve).
• Energy Dissipation: Handles 3.5J per transient event (calculated from 600W/10µs).

Reliability Features

• V-0 Flame-Rated Epoxy: Passes UL94 V-0 flammability tests.
• Matte Tin Plating: RoHS-compliant, solderable at 260°C for 30s (J-STD-020).
• Whisker-Free: JESD201A compliant for aerospace/military use.

Alternatives Comparison

Design Guidelines

1. Layout: Place ≤2cm from protected line with short trace lengths.
2. Grounding: Use star grounding to avoid ground loops.
3. Derating: Reduce power to 300W at 125°C per Fig. 3 derating curve.

Packaging & Ordering

• Tape & Reel: 4000 units/reel (EIA-296 compliant).
• Bulk: 1000 units/bag.
• Part Marking: P6KE6.8CA + YYWW date code.