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The 1.5KE550A is a high-power unidirectional transient voltage suppressor engineered for 550V DC systems. Rated at 1500W peak pulse power (10/1000µs), it provides fast response and strong clamping capability to protect sensitive components from lightning surges, inductive load switching, and high-energy transients. The DO-201 axial package ensures excellent thermal performance in industrial and power supply applications.