onsemi, 1.5KE250AG
The onsemi 1.5KE250AG is part of the company’s 1.5KE series of high-performance transient voltage suppression (TVS) diodes, designed to protect sensitive electronic equipment from voltage spikes and surges. Engineered for robustness, the device offers a breakdown voltage around 250 V and is intended for use in a wide range of applications that demand reliable overvoltage protection.
At its core, the 1.5KE250AG is built to clamp high-energy transients, such as those caused by lightning strikes, inductive switching, or load dump events in automotive systems. This makes it a staple in industrial electronics, telecommunications equipment, and power management circuitry. Its peak pulse power dissipation capability of 1500 W (when subjected to a 10/1000 µs waveform) allows it to safely absorb substantial energy without damage, providing a long operating life for systems that encounter occasional severe electrical stress.
Mechanically, the part comes in an axial-lead DO-201 package—a tried-and-true form factor that ensures ease of installation and replacement. The glass-passivated junction inside the diode enhances stability and reliability over time, while the rugged leaded body improves handling and soldering during assembly. The “AG” suffix denotes the glass-passivated version with high surge capability, giving it additional resilience compared to standard configurations in the same voltage range.
A key advantage of the 1.5KE250AG is its fast response time. In the event of a transient, it reacts almost instantaneously—within nanoseconds—to clamp the voltage and divert excess energy away from vulnerable circuitry. This rapid action helps prevent component failures and system downtime caused by electrical overstress (EOS). Engineers often select this part for power lines, signal lines, and DC bus protection, especially in environments where unpredictable transients are the norm.
The electrical characteristics are precise: a standoff voltage of 214 V, minimum breakdown voltage at 237 V, and maximum breakdown voltage at 263 V. These parameters make it suitable for medium- to high-voltage protection scenarios. The unidirectional configuration means it primarily suppresses positive transients on the protected line, a common requirement in many applications.
From a system design perspective, integrating the 1.5KE250AG is straightforward. Designers simply place it across the points in their circuit where transient protection is needed—often between a supply rail and ground or across a load. Its low cost, proven performance profile, and availability from onsemi’s extensive distribution network make it a go-to choice for both new product designs and replacement in existing systems.
In the broader context of TVS diodes, the onsemi 1.5KE series—including the 1.5KE250AG—represents a balance between power handling, repeatability, and durability. For engineers working in unpredictable electrical environments, the 1.5KE250AG delivers peace of mind: a device that will stand guard against transient damage without demanding complex implementation.
Whether installed in telecom base stations, industrial control cabinets, automotive power units, or renewable energy inverters, the onsemi 1.5KE250AG offers an effective combination of surge capability, fast clamping, and physical ruggedness—making it a reliable choice for high-voltage transient suppression needs.
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