1.5KE400A TVS Diode – 1500W Transient Voltage Suppressor 400V Unidirectional
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1.5KE400A TVS Diode – 1500W Transient Voltage Suppressor
Protect your sensitive electronics from voltage spikes and transients with the 1.5KE400A TVS diode. This unidirectional transient voltage suppressor is designed to clamp dangerous overvoltage events, safeguarding circuits in power supplies, automotive electronics, industrial controls, and communication systems.
Why Choose the 1.5KE400A TVS Diode?
The 1.5KE series offers fast response times and high surge current capability, making it ideal for protecting against lightning strikes, ESD (electrostatic discharge), and inductive load switching. With a 1500W peak pulse power rating, this diode absorbs transient energy before it damages your components.
Key Features & Benefits
- 1500W Peak Pulse Power: Handles high-energy transients effectively
- 400V Standoff Voltage: Unidirectional protection for DC circuits
- Fast Response Time: Clamps voltage spikes in nanoseconds
- Low Clamping Ratio: Minimizes voltage overshoot during transient events
- Axial Lead Package: Easy through-hole PCB mounting
- DO-201 Case: Industry-standard package for reliable performance
Common Applications
This TVS protection diode is widely used in:
- AC/DC power supply overvoltage protection
- Automotive electronics and battery management systems
- Industrial motor drives and relay circuits
- Telecom and data line protection
- Solar inverters and renewable energy systems
- Surge protection circuits and EMI filtering
Technical Specifications
| Parameter | Value |
| Part Number | 1.5KE400A |
| Peak Pulse Power (10/1000µs) | 1500W |
| Standoff Voltage (VRM) | 400V |
| Breakdown Voltage (VBR) | 444V min @ 1mA |
| Maximum Clamping Voltage | ~650V @ Peak Current |
| Peak Pulse Current (Ipp) | 2.3A |
| Polarity | Unidirectional |
| Package Type | DO-201 (Axial Lead) |
| Operating Temperature | -55°C to +175°C |
How TVS Diodes Work
TVS diodes operate in standby mode under normal conditions, presenting high impedance. When a transient voltage exceeds the breakdown voltage, the diode instantly conducts, clamping the voltage to a safe level and diverting surge current away from sensitive components. Once the transient passes, the diode returns to its high-impedance state.
Package Contents
- 1 x 1.5KE400A TVS Diode
Installation Notes
Install the TVS diode in parallel with the circuit or component you want to protect. Ensure correct polarity for unidirectional diodes (cathode toward higher voltage). Use appropriate PCB trace width to handle surge currents. For best protection, place the TVS diode as close as possible to the vulnerable component.
Reliable overvoltage protection for your critical circuits – trusted by engineers and makers across Pakistan.