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Qu'est-ce que le MTBF ? Comparer la fiabilité des PC industriels grâce au temps moyen entre défaillances

TSL Automation Solutions 1 juillet 2025 Mis à jour le 18 mai 2026

PC industriel sans ventilateur à MTBF élevé, TSL Automation Solutions

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What Is MTBF?

MTBF (Mean Time Between Failures) is a statistical measure of how long a device is expected to operate before experiencing a failure. It is typically expressed in hours. An MTBF of 50,000 hours means the device is statistically expected to operate for 50,000 hours before a failure, approximately 5.7 years of continuous 24/7 operation.

MTBF Is Probabilistic, Not Guaranteed

MTBF does not mean every unit will run for 50,000 hours without fail. It is an average derived from Arrhenius testing (accelerated life testing) and component reliability data. Individual units may fail earlier or later, but a higher MTBF means a lower probability of failure at any given point in time.

Typical MTBF Values for Industrial Equipment

Equipment Type	Typical MTBF
Consumer laptop	10,000 à 15,000 hours
Fan-cooled industrial PC	20,000 à 30,000 hours
Fanless industrial PC	50,000 à 100,000 hours
Cermate HMI panel	50,000+ hours (backlight)

Why Fanless Design Dramatically Improves MTBF

Fans are the most common failure point in industrial PCs, bearing wear, dust clogging, and motor failure. Eliminating fans removes the highest-failure-rate component, which is why fanless industrial PCs show significantly higher MTBF than fan-cooled equivalents.

All Avalue fanless industrial PCs and Cermate HMI panels are rated for 50,000+ hours MTBF. Contact TSL Automation Solutions for product reliability data.

Questions fréquentes

MTBF (Mean Time Between Failures) is a statistical measure of the expected average time between failures of a repairable system during normal operation. For industrial electronics, MTBF is calculated from component failure rates using MIL-HDBK-217 or Telcordia SR-332 standards. A higher MTBF indicates greater reliability, Avalue industrial PCs typically achieve 50,000 à 100,000+ hours MTBF, far exceeding commercial PC ratings.

Industrial PC MTBF is calculated by summing the failure rates of all components (capacitors, resistors, connectors, processor, storage, power supply) at their operating conditions (temperature, voltage stress). The sum of component failure rates gives the system failure rate (λ); MTBF = 1/λ. Higher operating temperatures exponentially increase failure rates, a system running at 60°C has significantly lower MTBF than the same system at 25°C.

Well-designed industrial PCs with fanless cooling and industrial-grade components achieve MTBF of 50,000 à 100,000 hours (6 à 11 years) under rated conditions. Commercial PCs in office environments achieve 30,000 à 50,000 hours, but this drops dramatically (to 10,000 à 20,000 hours) in dusty or high-temperature factory environments where fan bearings and electrolytic capacitors degrade much faster.

No, MTBF is a statistical average, not a guarantee. A system with 100,000-hour MTBF may fail at 10,000 hours or run for 200,000 hours. MTBF describes the expected average behaviour across a large population of identical units. For critical applications, combine high MTBF hardware with redundancy, preventive maintenance, and spare unit availability rather than relying on MTBF alone to prevent downtime.

Yes, Avalue industrial PCs have documented MTBF ratings calculated per industry standard methods. TSL Automation Solutions can provide MTBF data for specific Avalue models. Contact our Mumbai team for MTBF specifications for your shortlisted products.

Mots-clés : what is MTBF Mean Time Between Failures industrial PC MTBF reliability guide industrial PC reliability MTBF HMI panel equipment reliability India 24/7 industrial computer

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Sanjana couvre les tendances de l'automatisation industrielle, les lancements de produits et les analyses technologiques pour TSL Automation Solutions, distributeur basé à Mumbai d'IHM, de Panel PC et de systèmes informatiques embarqués au service des industriels en Inde et dans le monde.