This document describes the 1.5KE6.8 - 1.5KE440CA series of 18 1500 watt axial transient voltage suppressors, ideal for protecting I/O interfaces, Vcc bus, and other integrated circuits used in telecom, computer, datacom, and industrial electronics against voltage transients induced by inductive load switching and lightning.
The 1.5KE series from Littelfuse provides axial transient voltage suppressors ranging from 6.8 V to 440 V stand‑off voltage. Devices are offered in both uni‑directional and bi‑directional versions and are designed to protect sensitive electronics in telecom, computer, datacom and industrial applications.
Key features include a 1500 W peak pulse power rating, 5 W steady‑state dissipation, fast response time, and a wide operating temperature range of –55 °C to +150 °C. Mechanical details such as DO‑201AD molded‑plastic cases, axial leads, and packaging options (bulk or tape‑and‑reel) are also specified.
| Breakdown voltage range | 6.8 V to 440 V |
|---|---|
| Peak Pulse Power (Ppk) | 1500 W (10 µs) @25 °C |
| Steady‑state power | 5 W |
| Response time | 1 × 10⁻⁹ s (theoretical) |
| Forward surge rating (uni‑directional) | 200 A, 8.3 ms half‑sine |
| Operating & storage temperature | -55 °C to +150 °C |
| Case type | DO‑201AD molded plastic over glass‑passivated junction |
| Terminals | Axial leads, solderable per MIL‑STD‑202 Method 208 |
| Weight | 1.5 g (approx.) |
The device can handle a peak pulse power of 1500 W for a 10 µs pulse at 25 °C.
Two packaging options are offered: bulk (500 pieces) and tape‑and‑reel (1500 pieces).
The suppressors operate and can be stored from –55 °C up to +150 °C.
The suffix “C” denotes a bi‑directional device.