GoKawiilSurge protectors' MOV components wear out silently over time
Most household surge protectors rely on metal-oxide varistors (MOVs) to absorb excess voltage, but these components degrade with each surge and even with normal use over time. A worn-out surge protector often looks and functions identically to a new one, continuing to power devices even after its protective capability has failed. Some models are designed to cut power to outlets once the MOV protection is no longer functioning, but many are not.
GoKawiil's interpretation of the reporting above, not reported fact.
Because degraded surge protectors show no visible signs of failure, users may unknowingly leave expensive electronics—like gaming PCs or home office equipment—unprotected during power surges. This suggests regular replacement of surge protectors, rather than reliance on their outward condition, is necessary to maintain real protection. Alternative technologies like TVS diodes or gas discharge tubes exist but are less common in typical household setups.
- Most surge protectors use MOVs, which degrade with each voltage spike and over time regardless of surges.
- A failing surge protector often shows no outward signs and may keep powering devices without protection.
- Replacing surge protectors periodically, rather than trusting their appearance, is advisable for safeguarding equipment.
APC Performance SurgeArrest Protector — Since MOVs silently degrade with every surge, it helps to use a protector that actually tells you when it's no longer doing its job. The APC SurgeArrest line includes an indicator light that alerts you when protection has worn out, so you're not left guessing like with a basic unmarked power strip. It's a smart, affordable upgrade for anyone with a PC setup or home office worth protecting.
See APC Performance SurgeArrest Protector on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: engadget.com — Thomas Godwin, 2026-10-06
Published there as: “Why it's important to regularly replace your surge protectors”
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