About this part

1.5KE400CA – 1500W Bidirectional TVS Diode – Littelfuse Circuit Protection

Ensure robust surge protection for your electronics with the Littelfuse 1.5KE400CA TVS Diode from PCX. This bidirectional Transient Voltage Suppressor delivers industry-leading 1500W peak pulse power to shield sensitive components from voltage spikes, ESD, and lightning-induced transients. Engineered for reliability in harsh environments, it features a wide operating temperature range and DO-201 axial packaging for straightforward integration. PCX guarantees authentic Littelfuse components with rapid shipping and expert technical support.

Key Features

• Peak Pulse Power: 1500W (1.5kW) protection capability
• Voltage Clamping: Max 548V @ specified current
• Standoff Voltage: 342V (Typical)
• Breakdown Voltage: 380V (Min)
• Bidirectional: Single-channel Zener operation
• Temperature Range: -55°C to +175°C (TJ)
• Power Line Protection: Yes – Ideal for AC/DC systems

Technical Specifications

This axial-leaded TVS diode (DO-201AA/DO-27 package) provides symmetrical overvoltage suppression with a 2.8A peak pulse current rating (10/1000µs waveform). As a bidirectional Zener-type suppressor, it reacts nanoseconds to clamp transients across both voltage polarities. The component’s robust design ensures stable performance under extreme thermal conditions (-55°C to +175°C junction temperature), making it suitable for through-hole mounting in industrial-grade applications. Note: Image shown is representational; refer to datasheet for exact dimensions.

Typical Applications

• Industrial power supplies & motor drives
• Telecommunications infrastructure
• Automotive ECU and sensor protection
• AC line voltage surge suppression
• Consumer electronics surge protection

About Littelfuse

Littelfuse Inc. is a global leader in circuit protection technologies with over 95 years of innovation in electronic safety components. Their TVS diodes set industry benchmarks for surge-handling capacity and reliability, backed by rigorous testing standards and ISO-certified manufacturing processes.

Littelfuse components are trusted by Fortune 500 companies across automotive, industrial, and consumer sectors for mission-critical circuit protection. Their 1.5KE series represents a proven solution for high-power transient suppression, combining advanced semiconductor design with unmatched field performance data.

About TVS Diodes

Transient Voltage Suppressor (TVS) diodes are essential safeguarding components that divert damaging voltage spikes away from sensitive circuitry. Acting as electronic “shock absorbers,” they respond within picoseconds to clamp overvoltage events caused by electrostatic discharge (ESD), inductive load switching, or lightning surges.

Bidirectional TVS diodes like the 1.5KE series protect against both positive and negative transients without requiring polarity considerations during installation. Their high power handling (up to 1500W) makes them superior to standard Zener diodes for industrial power applications, providing robust defense while maintaining low leakage currents during normal operation.

Packaging Options

Available in industry-standard Tape & Reel (TR) for automated assembly or Cut Tape (CT) for prototyping needs. Specify packaging preference at checkout.

FAQs

Q: Is this TVS diode suitable for 230V AC line protection?
A: Yes, with a 342V standoff voltage, it’s designed for 230V AC systems where peak voltages reach ~325V.

Q: Can I use this for ESD protection on data lines?
A: While primarily designed for power lines, its fast response makes it effective for high-energy ESD events in industrial settings.

Q: What’s the difference between unidirectional and bidirectional TVS diodes?
A: Bidirectional models (like 1.5KE400CA) protect against both positive and negative surges, whereas unidirectional diodes only suppress one polarity.

Q: How does clamping voltage relate to standoff voltage?
A: Standoff voltage (342V) is the max operating voltage; clamping voltage (548V) is the maximum voltage during a surge event at rated current.

Q: Is conformal coating compatible with this diode?
A: Yes, the DO-201 package is compatible with standard PCB coatings when properly applied.

Q: Does PCX provide datasheets for this component?
A: Yes, download the full Littelfuse datasheet from our product page: [PCXCo.com/datasheets/1.5KE400CA]

Order Today for Reliable Protection!

Secure your design against voltage transients – purchase authentic Littelfuse 1.5KE400CA TVS diodes from PCX with guaranteed same-day shipping on in-stock items. Our technical support team is ready to assist with integration queries. Protect your circuitry now!