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What Is MTBF? How to Use Mean Time Between Failures to Compare Industrial PC Reliability

TSL Automation Solutions July 1, 2025

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	10,000–15,000 hours
Fan-cooled industrial PC	20,000–30,000 hours
Fanless industrial PC	50,000–100,000 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.

Frequently Asked Questions

What is MTBF (Mean Time Between Failures)?

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 50,000–100,000+ hours MTBF, far exceeding commercial PC ratings.

How is MTBF calculated for industrial PCs?

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.

What MTBF should I expect for industrial vs commercial computers?

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

Does MTBF guarantee a specific failure-free period?

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.

Do Avalue industrial PCs have documented MTBF ratings?

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.

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TSL Automation Solutions

Head of Marketing, TSL Automation Solutions

Sanjana covers industrial automation trends, product launches, and technology insights for TSL Automation Solutions, a Mumbai-based distributor of HMI, Panel PC, and embedded computing systems serving manufacturers across India and globally.

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What Is MTBF? How to Use Mean Time Between Failures to Compare Industrial PC Reliability

Table of Contents

What Is MTBF?

MTBF Is Probabilistic, Not Guaranteed

Typical MTBF Values for Industrial Equipment

Why Fanless Design Dramatically Improves MTBF

Frequently Asked Questions

Need help choosing the right product?

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