Electronic Burn-in: Securing Safe Startup of Critical Products

In high‑reliability and high‑quality electronic systems, reliability cannot be declared — it must be built in from the earliest phases of the product lifecycle. In particular for safety‑critical applications, the first hours of operation often present the highest risk. This is precisely where burn‑in and early‑life stress testing play a key role.

Electronic burn‑in refers to all accelerated stress tests applied to components, electronic assemblies, or finished products to reveal and eliminate early‑life failures before the product enters service.

These failures, often undetectable during standard functional tests, typically occur during the initial stages of the product’s life, as illustrated by the well‑known bathtub curve in electronic reliability.

Burn‑in consists of the controlled application of thermal, mechanical, and electrical stresses designed to expose latent weaknesses linked to design or manufacturing.

Most electronic failures neither occur randomly nor at end‑of‑life.
They appear within the first hours of operation, when the product is exposed to its first real‑world stresses.
Without burn‑in:

• early defects may occur at the end user,
• the field unintentionally becomes the test bench,
• return, analysis, and downtime costs skyrocket.

Burn‑in targets the phase where industrial risk is at its highest: the product start‑up.

An effective burn‑in program is based on test methods tailored to the product’s mission profile and its level of criticality.
It may combine several approaches:

• Burn‑In: extended operation under controlled temperature.
• ESS (Environmental Stress Screening): thermal, vibration, or combined stresses.
• HALT / HASS: identification of design limits and production screening.
• Thermal Cycling (Rapid Temperature Variation): fast thermal transitions to reveal latent mechanical defects.
• Targeted electrical stresses: power supply, overvoltage, operational stresses.

These tests are valuable only when considered early in the design phase and integrated into a coherent reliability strategy.

The best practices which are recommended by our experts to prevent early‑life failures and latent defects from the design stage:

The objective of burn‑in is to eliminate early failures originating from manufacturing (components, assembly, etc.). A product may pass structural and/or functional tests yet fail under stress testing.
During design, it is strongly recommended to:

• perform DfM (Design for Manufacturability) for pad sizes, thermal joints, and related considerations — although these alone cannot prevent all early‑life failures;
• define burn‑in parameters based on the product’s mission profile and its BOM. Through burn‑in, the goal is to eliminate the decreasing portion of the bathtub curve, a widely used reliability model in electronics, without reducing the product’s overall lifetime.

Tame‑Test can support you — contact us!

Burn‑in should not be a test added at the end of the project.
It must be embedded in a global strategy aligning:

• the product design, mission profile, and BOM as inputs,
• the intended manufacturing process,
• available test and stress capabilities,
• reliability and service‑life requirements.

At Tame‑Test, we support industrial players in defining their test and burn‑in strategy, as well as in designing and industrializing the associated equipment.

Discover our range of RELY burn‑in test benches.

Burn‑in and Environmental Stress Screening (ESS) are a key lever for securing the commissioning of electronic products, especially in critical industrial environments.

Performing burn‑in means testing and acting where industrial risk is highest: at product start‑up.

Burn‑in done right prevents your field deployment from becoming your test bench!