Learning path

Knowledge Hub

From lightning concepts to low-voltage power-line SPD products—a structured guide for engineers, panel builders, and local partners.

2. Surge Phenomena & Overvoltages · Page 5 of 6

How Surges Damage Equipment

Immediate failure vs latent damage that shortens life.

Hard failure

Punctured insulation, welded contacts, exploded capacitors, and destroyed IGBT/MOSFET modules are obvious post-strike failures.

Latent damage

Partial insulation stress can leave equipment running but fragile. Intermittent trips, mysterious PLC resets, and shortened LED driver life often trace back to repeated surges.

Business impact

Downtime, spoiled batches, lost access-control events, and emergency callouts usually cost more than a properly staged SPD system.

← Common-Mode vs Differential-Mode Surges

Observing Surges in the Field →

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