ISO 16750-4-2023 PDF

Full title and description

Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 4: Climatic loads (ISO 16750-4:2023). This international standard defines climatic environmental stresses and associated test methods and requirements for electrical and electronic systems and components used in road vehicles (including electric propulsion systems and components in voltage class B), and gives guidance for selecting appropriate tests based on mounting location.

Abstract

ISO 16750-4:2023 describes climatic loads applicable to vehicle electrical/electronic systems and components, specifying operating temperature ranges, humidity and condensation tests, salt/mist and corrosion procedures, solar radiation/UV ageing, cold-water shock, dust and atmospheric pressure (altitude) tests, plus documentation and selection guidance tied to mounting location. It is not intended for motorcycles and mopeds and permits transitional arrangements for items already released for production prior to publication.

General information

• Status: Published (International Standard).
• Publication date: July 2023 (Edition 4, 2023).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.040.10 (Electrical and electronic equipment for road vehicles).
• Edition / version: Edition 4 (2023).
• Number of pages: 59 pages (ISO published document count).

Scope

Applies to electrical and electronic systems and components for road vehicles (including electric propulsion and voltage class B components). The document describes potential climatic environmental stresses and specifies recommended tests and requirements according to specific mounting locations in/on the vehicle. It excludes environmental testing requirements specifically for motorcycles and mopeds and allows limited transitional exemptions for items released for production before this edition.

Key topics and requirements

• Defined operating temperature ranges and coded temperature classes for specifying low/high limits and hot-soak conditions.
• Tests at constant temperature (storage and operational) and temperature-step tests to verify function across the operating range.
• Temperature cycling and rapid temperature-change (thermal-shock) procedures with mass-based test selection guidance.
• Cold-water shock (splash and submersion) and condensation / dewing tests to simulate wet-road and condensation effects.
• Salt spray, cyclic corrosion and mixed-gas corrosion procedures for corrosion resistance and leakage/function verification.
• Humid heat (cyclic), damp heat (steady state) and composite temperature/humidity tests to assess moisture-induced failures.
• Solar radiation / UV ageing tests, dust ingress and atmospheric pressure (altitude) tests for environmental exposure and sealing requirements.
• Code for climatic loads, protection against water and foreign objects, documentation requirements, and informative annexes (test selection by mounting location, salt-spray cycle rationale, insulation tests, atmospheric-pressure justification).
• Normative cross-references to relevant IEC/ISO test-method standards (for example IEC 60068 series) that are used as the basis for many test procedures.

Typical use and users

Used by automotive OEMs, component suppliers, test laboratories, design and reliability engineers, and procurement/specification teams to define environmental test requirements for vehicle electrical/electronic equipment. It is applied during product development, validation, qualification and supplier acceptance activities to ensure climatic robustness of in-vehicle electronics.

Related standards

ISO 16750 (other parts: Part 1 — General, Part 2 — Electrical loads, Part 3 — Mechanical loads, Part 5 — Chemical loads), IEC 60068 series (environmental testing methods referenced by ISO 16750-4), ISO 20653 (degrees of protection, IP code), ISO 21498-1 and ISO 21780 (voltage-class / 48 V requirements referenced for electrical test conditions).

Keywords

automotive; road vehicles; environmental testing; climatic loads; temperature cycling; damp heat; condensation; salt spray; corrosion; solar radiation; dust ingress; atmospheric pressure; IP protection; electrical/electronic components; ISO 16750.

FAQ

Q: What is this standard?

A: ISO 16750-4:2023 is the Part 4 climatic-loads section of the ISO 16750 series, specifying climatic environmental stresses and associated test methods for electrical and electronic equipment in road vehicles.

Q: What does it cover?

A: It covers test definitions and requirements for temperature extremes and cycling, humidity and condensation, cold-water shock, salt spray and corrosion, solar radiation/UV ageing, dust and altitude/atmospheric-pressure effects, plus guidance for selecting tests by mounting location and documentation requirements.

Q: Who typically uses it?

A: Automotive OEMs, Tier suppliers, compliance/test laboratories, design and reliability engineers, and procurement/specification authors use the standard to specify and verify climatic robustness of in-vehicle electrical/electronic systems and components.

Q: Is it current or superseded?

A: Current — ISO 16750-4:2023 (Edition 4, July 2023) replaces the previous 2010 edition. Organizations updating test specifications should reference the 2023 edition for new projects while noting transitional allowances for items already released for production before publication.

Q: Is it part of a series?

A: Yes — it is Part 4 of the ISO 16750 series (Parts 1 through 5) which together define environmental conditions and testing for electrical and electronic equipment in road vehicles.

Q: What are the key keywords?

A: Climatic loads, temperature cycling, damp heat, condensation, salt spray/corrosion, solar radiation, dust ingress, atmospheric pressure (altitude), IP/protection, vehicle electronics.