CISPR 25-2021 PDF

Full title and description

Vehicles, boats and internal combustion engines — Radio disturbance characteristics — Limits and methods of measurement for the protection of on‑board receivers (CISPR 25:2021). The standard specifies emission limits and measurement methods (conducted and radiated) intended to protect receivers installed on-board vehicles and similar mobile platforms from radio disturbance generated by vehicle electrical/electronic equipment and components.

Abstract

CISPR 25 (5th edition, 2021) is a technical revision that updates frequency bands and measurement requirements used to assess vehicle and component radio disturbance in order to protect on‑board receivers (broadcast, land mobile, satellite navigation/GNSS, Wi‑Fi/Bluetooth, V2X, etc.). The recommended measurement range in this edition is from 150 kHz up to about 5 925 MHz and the document defines both vehicle‑level and component/module test methods and limits.

General information

• Status: Current (active international standard, 5th edition).
• Publication date: 16 December 2021.
• Publisher: CISPR (under the International Electrotechnical Commission — IEC).
• ICS / categories: 33.100.10 (emission), 33.100.20 (immunity).
• Edition / version: Edition 5.0 (fifth edition, 2021).
• Number of pages: 372 pages (published edition).

Scope

Covers limits and methods of measurement of radio‑frequency disturbances (conducted and radiated) produced by vehicles, boats, trailers, internal combustion engine powered devices and the electrical/electronic components intended for use in those platforms. The standard provides procedures to evaluate complete vehicles and separately mounted components/modules, and is intended to protect on‑board receivers from objectionable disturbances. It is not intended to address immunity of vehicle control systems to RF transients or some types of electrical transients (those subjects are addressed by other ISO/IEC/ISO‑related documents).

Key topics and requirements

• Frequency range of measurement and limits: 150 kHz to 5 925 MHz in this edition (expanded bands compared with prior edition).
• Vehicle‑level limits and test methods (radiated and conducted) to assess overall on‑board disturbance.
• Component/module test methods (conducted and radiated), with guidance on correlation between component tests and vehicle tests.
• Measurement environments and instrumentation: requirements for absorber‑lined shielded enclosures (ALSE), artificial networks, probes, spectrum analysis techniques and uncertainty considerations.
• Classification of disturbance types and durations, and limits tailored to protect typical receiver types (broadcast, mobile radio, GNSS, Wi‑Fi/Bluetooth, V2X).
• Annexes covering measurement uncertainty and other technical clarifications; removal of the TEM‑cell annex present in earlier editions.

Typical use and users

Used by automotive, marine and power‑tool manufacturers; component and module suppliers; EMC test laboratories; design and validation engineers working on vehicle electrical/electronic systems; certification bodies and regulatory agencies assessing receiver protection and vehicle electromagnetic compatibility. Typical activities include design validation, supplier qualification, pre‑compliance and formal compliance testing.

Related standards

Commonly used alongside other EMC and automotive standards such as CISPR 12 (vehicle and engine‑powered device radiated emission limits for the protection of the environment), CISPR/CIS/IEC 16 series (measurement methods and instrumentation), ISO 11451 / ISO 11452 (vehicle and component immunity methods), ISO 7637 (transient disturbances in road vehicles), and applicable national/adopted variants (for example EN/DIN adaptations). Users should refer to these for immunity, specific test setups, or regional implementations.

Keywords

CISPR 25, vehicle EMC, radio disturbance characteristics, receiver protection, radiated emissions, conducted emissions, ALSE, V2X, GNSS/GPS, automotive components, measurement uncertainty.

FAQ

Q: What is this standard?

A: CISPR 25:2021 is the 5th edition of the international standard that specifies limits and measurement methods for radio disturbance from vehicles, boats, internal combustion engine‑powered devices and their electrical/electronic components, intended to protect on‑board receivers.

Q: What does it cover?

A: It covers both vehicle‑level and component/module conducted and radiated emission measurements, defines applicable limits and gives procedures, measurement environments and equipment requirements (e.g., ALSE, probes, artificial networks), and includes annexes on topics such as measurement uncertainty. The measurement frequency range in this edition is approximately 150 kHz to 5 925 MHz.

Q: Who typically uses it?

A: Vehicle and marine OEMs, component suppliers, EMC test labs, design and validation engineers, and certification/regulatory organizations use CISPR 25 for design validation, supplier acceptance testing and formal EMC compliance where receiver protection is required.

Q: Is it current or superseded?

A: CISPR 25:2021 is the current (as published December 16, 2021) fifth edition and it cancels and replaces the 2016 (4th) edition and associated corrigenda.

Q: Is it part of a series?

A: Yes — it is part of the CISPR family of standards addressing radio disturbance characteristics and measurement methods; it is commonly used with other CISPR and IEC/ISO automotive EMC standards covering emission, immunity and measurement instrumentation.

Q: What are the key keywords?

A: EMC, vehicle emissions, receiver protection, radiated emissions, conducted emissions, ALSE, V2X, GNSS/GPS, measurement uncertainty.