is the definitive international standard for protecting on-board radio receivers from electromagnetic interference (EMI) generated by a vehicle’s own electrical systems and components. Since its inception in 1995, it has evolved from covering basic AM/FM radio to managing the complex electromagnetic environments of modern electric and autonomous vehicles. Com-Power Corporation Comparative Overview: 2002 vs. 2021 Editions
While the core goal of protecting on-board receivers remains consistent, the technological gap between the Second Edition (2002) Fifth Edition (2021)
is substantial, reflecting two decades of automotive innovation. EMC Directory CISPR 25:2002 (Edition 2) CISPR 25:2021 (Edition 5) Frequency Range 150 kHz to 1,000 MHz 150 kHz to 5,925 MHz Primary Focus AM/FM, TV, and early mobile radio Wi-Fi, Bluetooth, V2X, 5G, and GPS Electric Vehicles Limited/No specific EV/HEV setups Detailed EV/HEV charging & high-voltage testing Chamber Specs General ALSE requirements Enhanced absorber performance (≥6dB from 70MHz–6GHz) Special Methods Includes TEM Cell annex TEM Cell annex deleted Key Evolutionary Milestones CISPR 25:2002 (Edition 2):
This version solidified the foundational test methods for conducted and radiated emissions. It introduced "Class" limits (e.g., CISPR 25 Class 5
) to allow manufacturers to categorize components based on their proximity to antennas and their interference potential. CISPR 25:2021 (Edition 5):
The latest release addresses the "connected car" era. Key updates include: Frequency Expansion:
Pushed the upper limit to nearly 6 GHz to cover modern wireless protocols like 802.11p (V2X) and high-frequency communication. Measurement Uncertainty:
Added new annexes to help labs provide more precise, repeatable data. High-Voltage Testing:
Refined methods for high-voltage (HV) shielded power supply systems, critical for EV battery and inverter safety. iTeh Standards Where to Download the Standard
Official, legally compliant versions of these standards are available for purchase and immediate download in PDF format through authorized platforms: IEC Webstore: The primary source for the latest CISPR 25:2021 and historical editions like CISPR 25:2002 National Standards Bodies:
Regional versions (e.g., EN 55025 in Europe) can be found at the EVS Standard Portal iTeh Standards Catalog
Avoid "free" download sites, as these often host outdated, incomplete, or malware-infected files. Official standards are copyrighted intellectual property and are required for legitimate OEM certification. Are you preparing for a specific compliance test or looking for technical guidance on ALSE chamber setup for the 2021 edition?
This guide provides an overview of , the essential international standard for protecting on-board radio receivers from electromagnetic disturbances in vehicles. While the 2002 edition (Edition 2.0) established the groundwork, the 2021 edition (Edition 5.0) is the current industry benchmark. 1. Overview of CISPR 25:2021 CISPR 25:2021 cispr 25 2002 pdf 2021 download
standard sets limits and measurement procedures for radio disturbances ranging from 150 kHz to 5,925 MHz
. It is used to ensure that electronic components within a vehicle—such as those in cars, boats, and internal combustion engines—do not interfere with on-board receivers like GPS, Wi-Fi, and Bluetooth. IEC Webstore 2. Key Differences: 2002 vs. 2021 Editions
If you are coming from the 2002 version, the 2021 update includes critical technical revisions to keep pace with modern automotive technology: Expanded Frequency Range:
Covers higher bands up to nearly 6 GHz to include technologies like (Vehicle-to-Everything) and New Receiver Protection: Adds specific categories for Wi-Fi, Bluetooth, and Satellite Navigation that were not present in earlier versions. Testing Changes: Includes new annexes for measurement uncertainty
and removes the annex on TEM cells for certain component testing. EV & Charging Support:
Detailed procedures for electric vehicle (EV) charging modes, including both AC and DC charging. iTeh Standards 3. How to Legally Download the PDF
Standard documents are protected by copyright. You can purchase and download the official CISPR 25:2021 PDF from these authorized distributors: IEC Webstore: The primary source for the official CISPR 25:2021 publication ANSI Webstore: Provides the CISPR 25 Ed. 5.0 b:2021 for American users. Regional Bodies: Organizations like Austrian Standards EVS (Estonian Centre for Standardisation) also offer digital downloads. IEC Webstore 4. Core Testing Methods The standard focuses on two main types of testing: Conducted Emissions:
Measures RF disturbances on power and signal leads using the Voltage Method (with an Artificial Network/LISN) or the Current Probe Method Radiated Emissions: Conducted in an Absorber-Lined Shielded Enclosure (ALSE)
to simulate real-world conditions while blocking external interference. Keystone Compliance CISPR 25:2021 - IEC Webstore
The search for the 2002 document often stems from a need to compare "then" vs. "now."
Between 2002 and the current versions (Edition 4 and beyond), the standard underwent massive changes to fix those reproducibility issues.
If an engineer is downloading the 2002 PDF, they are likely doing "gap analysis"—figuring out if a product that passed the old 2002 limits will survive the harsher, tighter requirements of modern vehicles. The Evolution: From 2002 to the Modern Era
Would you like help understanding the content of CISPR 25 instead (limits, test methods, ALSE setup)? I can explain that in a clear, story-free technical summary.
The Verdict: If you are working on an autonomous vehicle (AV), an electric vehicle (EV) drive train, or a connected car module in 2025, the 2002 PDF is useless to you. You will fail the test before you start.
Let's walk through the fastest legal route to get the PDF in your hands today.
For the 2021 Edition (Recommended):
CISPR 25:2021.For the 2002 Edition (Legacy Only):
CISPR 25:2002.The query "cispr 25 2002 pdf 2021 download" is a time capsule. It encapsulates the tension between legacy automotive engineering and the digital age. It reflects an engineer’s need to validate a part against a historical baseline while operating in a modern workflow.
While the 2002 standard served the industry well during the transition from analog to digital automotive systems, the reality is that the electromagnetic environment has changed. The explosion of Electric Vehicles (EVs) and Advanced Driver Assistance Systems (ADAS) has made the old limits obsolete.
For those searching for this document today, the advice from the industry is clear: Use the 2002 standard only if you are supporting a legacy program. If you are designing for the future, you must move past the 2002 PDF and embrace the complex, tighter, and more expensive reality of the current CISPR 25 editions. The silence of the modern vehicle depends on it.
The primary difference between the 2002 (2nd Edition) 2021 (5th Edition)
versions of CISPR 25 is the expansion of frequency ranges and the inclusion of modern technologies like Electric Vehicles (EVs)
and high-frequency wireless services. While the 2002 version is now considered a deleted publication, the 2021 edition is the current global standard for protecting on-board receivers from electromagnetic interference. IEC Webstore Key Technical Evolution: 2002 vs. 2021
The standard has evolved from basic radio protection to a comprehensive framework for complex automotive ecosystems: CISPR 25: Automotive Component EMC Testing - TÜV SÜD or vehicles designed before 2005.
The CISPR 25 standard is the primary international guideline for protecting on-board radio receivers from electromagnetic disturbances produced by automotive components and systems. Essential Comparison: 2002 vs. 2021 Editions
While the 2002 version established many core methods, the 2021 (5th) edition is the current authoritative standard for modern vehicles. CISPR 25:2002 (Edition 2) CISPR 25:2021 (Edition 5) Frequency Range 150 kHz to 1000 MHz 150 kHz to 5925 MHz New Technologies Focused on AM/FM, TV, and basic mobile radio
Adds support for V2X, 5G, and high-frequency wireless systems Electric Vehicles Limited coverage for high-voltage systems
Includes specific setups for EV/HEV charging and high-current modules Key Additions Updated measurement techniques
Adds measurement uncertainty annexes; removes TEM cell annex Core Testing Requirements CISPR 25:2002 | iTeh Standards
The primary "useful feature" of CISPR 25 is its specialized focus on protecting on-board receivers in vehicles from radio frequency (RF) interference. While the 2002 version laid the groundwork, the 2021 edition (Edition 5) introduces critical updates for modern electric and hybrid vehicles. Key Features and Updates
Protection of On-Board Receivers: Unlike other standards that focus on general environment protection, CISPR 25 specifically ensures that electronic components within a vehicle don't interfere with its own radio, GPS, or cellular systems.
High-Voltage (HV) System Testing: The 2021 update adds comprehensive test procedures for components connected to high-voltage power buses, which is essential for Electric Vehicles (EVs) and Hybrid Electric Vehicles (HEVs).
Charging Mode Requirements: It defines emission limits and test methods for vehicles in "charging mode," ensuring that EVs don't create excessive noise while plugged into a charging station.
Expanded Frequency Ranges: The standard covers a broad spectrum, typically from 150 kHz to 5.925 GHz, capturing interference for everything from AM radio to modern 5G and V2X (Vehicle-to-Everything) communications.
ALSE Test Method: It provides detailed specifications for the Absorber Lined Shielded Enclosure (ALSE) method, which is the industry-standard environment for repeatable component-level testing. Comparison: 2002 vs. 2021
While the 2002 version is largely obsolete for modern automotive design, it established the basic limit classes (Class 1 to 5) still used today. The 2021 version is necessary for any engineer working with high-voltage systems, digital telematics, or modern shielding requirements.
Note on Downloads: Official copies of the CISPR 25:2021 PDF are available for purchase through the IEC Webstore or national standards bodies (like ANSI or DIN). "Free" downloads found on third-party sites are often unauthorized and may contain outdated or incomplete technical data.