onsemi, 1.5KE68A
The onsemi 1.5KE68A is part of the well-known 1.5KE series of transient voltage suppressor (TVS) diodes, designed to protect sensitive electronic equipment from voltage spikes and surges. Built by onsemi, a leading semiconductor supplier, this component combines high reliability with precise engineering, making it a trusted choice for engineers who require robust transient protection in demanding environments.
The 1.5KE68A is designed for use in a variety of applications, including industrial control systems, automotive electronics, telecommunications, and consumer devices. It operates by clamping overvoltage transients, such as those caused by inductive load switching, lightning strikes, or electrostatic discharge (ESD), to a safe level that downstream circuitry can tolerate. By quickly responding to voltage surges, it helps prevent damage to microcontrollers, sensor interfaces, and other semiconductors that can be destroyed by instant spikes.
In terms of specifications, the "68A" in its designation refers to the breakdown voltage range—about 68 volts—with tight tolerances to ensure predictable performance. The 1.5KE series is known for handling large amounts of surge energy, and the 1.5KE68A in particular can absorb peak pulse powers of up to 1500 watts within 1 millisecond. Such capability makes it suitable for harsh electrical environments where high-energy transients are common. Its unidirectional configuration means it conducts in one direction when triggered, making it ideal for DC applications requiring polarity-specific protection.
The device comes in the DO-201 axial-leaded package, which facilitates easy installation on through-hole printed circuit boards (PCBs). This rugged package is designed to withstand mechanical stress as well as thermal loads. In operation, the TVS diode remains in a high-impedance state during normal voltage conditions, essentially invisible to the circuit. When a transient strikes, the diode switches to a low-impedance path and shunts the excess energy away from sensitive downstream components. Once the transient dissipates, the diode returns to its usual non-conductive state without affecting normal circuit operation.
Engineers appreciate the 1.5KE68A not just for its protective features but also for its reliability under repetitive stresses. A key advantage is its rapid response time—on the order of nanoseconds—which is critical when dealing with sudden, unpredictable voltage spikes. Compared to other suppression devices such as metal oxide varistors (MOVs), TVS diodes like the 1.5KE68A offer faster clamping action and more consistent breakdown characteristics.
Typical use cases include:
In summary, the onsemi 1.5KE68A is a high-performance transient voltage suppressor built for energy-handling strength and rapid response. Whether you are developing a rugged industrial system or fine-tuning a sensitive electronics project, the 1.5KE68A provides a dependable barrier against voltage-induced failures. Given its proven performance and availability in quantity from distributors worldwide, it remains a solid choice for engineers seeking both durability and precision in transient protection.
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