“Environmental testing” is a phrase used for many different standard sets. IEC 60068, MIL-STD-810, ISO 16750, ISTA, IEC 60529 and DO-160 can all appear in the same file — but they answer different questions and apply to different subjects.
This article compares the six most frequently confused standard sets, so that companies know when each one is needed and when several must be combined.
1. Why are these standard sets so often confused?
Because they all use the same keywords: temperature, humidity, vibration, shock, dust, water. But their philosophies differ:
- IEC 60068: provides methods and ranges of severity levels; the requirement writer selects the level.
- MIL-STD-810: starts from real environmental conditions by operating region and platform (ground troops, vehicles, aircraft, ships) and requires life-cycle environmental analysis.
- ISO 16750: specifically for electrical and electronic equipment installed on road vehicles, divided by mounting location on the vehicle.
- ISTA / ASTM D4169: for transport packaging systems, not for assessing the electronic equipment itself.
- IEC 60529: sets out the IP protection system and how the degree is determined, not a comprehensive climatic test method set.
- DO-160 / IEC 60945: methods for the aviation and maritime industries.
2. Quick comparison table
| Standard | Subject | Philosophy for choosing severity | When to use it |
|---|---|---|---|
| IEC 60068 | Products, components, electrical and electronic equipment in general | The standard provides ranges; the requirement writer chooses the level | Customer requirements phrased as “to IEC 60068-2-x”; general product documentation |
| MIL-STD-810 | Military equipment and equipment used in extreme conditions | Tied to the real life-cycle environment, with analysis | Defence projects, equipment for special environments |
| ISO 16750 (and ISO 19453 for electric vehicles) | Electrical and electronic equipment installed on road vehicles | By mounting location and the exposure level of the vehicle | Automotive supply chains, OEM/Tier 1 parts |
| ISTA / ASTM D4169 | Packaging systems and shipments | By distribution mode (parcel, LTL, pallet…) | Transport testing, packaging optimisation, retailer requirements |
| IEC 60529 | Equipment enclosures | IP protection degree determined by the specified tests | Declaring the product’s IP rating |
| DO-160 / IEC 60945 | Aviation / maritime equipment | Environmental categories by mounting location | Products for the respective industry |
3. How do IEC 60068 and MIL-STD-810 differ?
The biggest difference is how severity is determined. IEC 60068 leans towards selecting from an existing range of levels, which suits situations where the requirement has already been agreed in the product documentation. MIL-STD-810 requires the real environment to be established from the life cycle and the platform of use, so the volume of input data is much larger.
For commercial companies, IEC 60068 is usually the default choice because cost and lead time are reasonable. For defence projects or equipment operating in extreme regions, only MIL-STD-810 supports the level of justification required.
4. ISO 16750: when a product goes onto a vehicle
ISO 16750 is divided by mounting location (engine compartment, passenger compartment, on the vehicle body…) and by operating state. One point companies should note: the same circuit board installed in two different locations will face different requirements. For electric and hybrid vehicles, the ISO 19453 set adds requirements for electric drive systems, while energy storage systems have their own standard set.
5. ISTA and ASTM D4169: both about transport, different subjects
IEC 60068 does include tests related to rough handling and transport (for example Test Ec, Test Ee). However, when the objective is to assess a packaging system according to distribution mode, the ISTA or ASTM D4169 set is the appropriate one, because they build a test sequence around the distribution route and evaluate the packaging together with the product inside.
In practice, a product may be tested on both tracks at once: the equipment to IEC 60068 (climate, vibration, shock) and the packaging to ISTA (drop, vibration, compression). The two sets complement each other rather than replace each other. See also our series of guides on choosing ISTA test procedures in the corresponding category.
6. Is IEC 60529 (IP rating) part of IEC 60068?
No. IEC 60529 defines the IP code system and the method for determining the degree of protection. IEC 60068-2-18 (Test R/S/T/U) provides more detailed water test methods for a different purpose. When a customer requires “IP67”, test to IEC 60529; when they require “water resistance to IEC 60068-2-18”, the scope and purpose are different.
7. When are several standard sets needed at once?
| Situation | Standard sets commonly used together |
|---|---|
| Consumer electronics exported to the EU | IEC 60068 (environment) + EMC + electrical safety + chemical requirements |
| Automotive parts | ISO 16750/ISO 19453 + automotive EMC + material requirements |
| Medical equipment | IEC 60601-1 (safety) + IEC 60601-1-11 (home use) + EMC |
| Equipment with retail packaging | IEC 60068 (equipment) + ISTA/ASTM D4169 (packaging) |
| Outdoor equipment | IEC 60068 (Sa, Ka/Kb, L, R/S/T/U) + IEC 60529 + materials |
8. Common mistakes when citing standards
- Mixing criteria: taking MIL-STD-810 severity levels but applying IEC 60068 acceptance criteria.
- Wrong inference: treating “passes IEC 60068” as sufficient to conclude that the equipment withstands the automotive environment.
- No mounting location analysis: applying one level to every mounting location on a vehicle.
- Ignoring the subject: using a packaging test to draw conclusions about the equipment, or the reverse.
- Not checking the edition: the product standard refers to an old edition while the documentation cites a newer one.
One further practical note: industry standard sets often refer back to IEC 60068 for certain tests (climate testing, for example), while setting their own rules for choosing vibration or shock levels. So reading the industry standard first, and only then the method set, will make a test plan leaner and more accurate.
9. Frequently asked questions
If the customer does not specify a set, which should we use?
Ask again in writing. IEC 60068 is the default for general electrical and electronic products, but confirm it, because this directly affects cost and whether the result will be accepted.
Does IEC 60068 replace ISO 16750 for automotive parts?
No. The two differ in how severity is determined and in their context of application.
If we have already done ISTA, do we still need IEC 60068?
Yes, if the objective is to demonstrate the equipment’s resistance to climatic conditions. ISTA focuses on the packaging system and the distribution journey.
Can an IP rating replace water testing to IEC 60068?
No. The IP rating is a classification of protection with its own method; water testing to IEC 60068-2-18 serves a different purpose and severity.
Is there a “parent” standard set that covers everything?
No. Each set serves a subject and a context; the choice is based on market and customer requirements.
What should be recorded in technical documentation to avoid confusion?
Three elements: the standard number with year, the test code and severity level, and the acceptance criteria. These three resolve almost every dispute about “which standard was tested”.
10. Conclusion
IEC 60068, MIL-STD-810, ISO 16750, ISTA, IEC 60529 and DO-160 do not compete with each other — they serve different objectives. The most common error is not choosing the wrong standard, but citing a standard without stating the part, the level and the acceptance criteria.
Three things to do: confirm the standard set and edition with the customer in writing; clearly separate equipment testing from packaging testing in the test plan; and record enough information for a third party to verify the result.
References
- IEC 60068-1 — Environmental testing: General and guidance.
- MIL-STD-810 — Environmental test methods and engineering guidelines.
- ISO 16750 (parts) — Road vehicles: environmental conditions and testing for electrical and electronic equipment.
- ISTA Series and ASTM D4169 — Transport packaging testing standards.
- IEC 60529 — Degrees of protection provided by enclosures (IP code).
- RTCA DO-160 and IEC 60945 — Environmental testing for aviation and maritime equipment.
Related articles
- What is IEC 60068? Structure of the standard set and how to read test codes
- TCVN 7699 and IEC 60068: Vietnam’s equivalent standard set, and when to use which
- What is the ISTA standard? How to choose the right package test procedure
- What competence does a testing laboratory need? ISO/IEC 17025, VILAS and accredited scope
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This article is interpretive content written by our team; it is not legal advice. Companies should review the original text of the applicable regulations and standards before applying them to a specific product.
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