EN IEC 55025 (CISPR 25)

EN IEC 55025 is the European adoption of CISPR 25, an international automotive EMC emission standard that specifies limits and measurement methods for radio disturbance characteristics of vehicles, boats, internal combustion engines, trailers, and electrical or electronic components intended for use in those applications.

The standard addresses conducted and radiated emissions to help protect on-board receivers, such as broadcast radio, mobile communication, GNSS, Wi-Fi, V2X, Bluetooth, and other communication systems installed in or used with vehicles. The current international edition is CISPR 25:2021. The corresponding European adoption is EN IEC 55025:2022; the German publication is DIN EN IEC 55025 (VDE 0879-2):2023-11.

Scope and Application

EN IEC 55025 applies to equipment that:

• Is intended for use in vehicles, boats, trailers, internal combustion engine applications, or related automotive systems

• May generate conducted or radiated disturbances that could affect on-board radio or communication receivers

• Requires component-level or vehicle-level EMC emission assessment

• Is tested where no more specific customer, vehicle manufacturer, or product-family requirement takes precedence

It covers radio disturbance measurements for vehicles and related electrical or electronic components. EN IEC 55025 is often used in automotive EMC test planning together with vehicle manufacturer specifications, UN/ECE Regulation No. 10, and immunity standards such as the ISO 11452 series.

Typical Test Setup

• Conducted disturbance measurements: Artificial networks or appropriate coupling arrangements connected to the Equipment Under Test (EUT) and its supply lines

• Radiated disturbance measurements: Shielded room, absorber-lined chamber, or suitable automotive EMC test environment with calibrated antennas and EMI receiver

• Component testing: Electrical or electronic sub-assemblies operated in representative or worst-case modes using defined harness and load configurations

• Vehicle-level testing: Vehicle or system operated in defined operating modes while emissions are measured to assess potential impact on on-board receivers

• Receiver protection focus: Test configuration selected to evaluate disturbances in frequency ranges relevant to radio and communication reception

Use in Compliance and Customer Approval

• EN IEC 55025 / CISPR 25 is not a certification scheme or approval regulation; it is a technical EMC emission standard used for test planning, customer specifications, and approval evidence where referenced.

• In Europe, EN IEC 55025 may be used together with UN/ECE Regulation No. 10 or vehicle manufacturer EMC requirements.

• Limit classes and acceptance criteria may depend on the applicable customer specification, vehicle platform, component category, or approval route.

• Intentional radio transmissions are not the primary subject of EN IEC 55025 / CISPR 25 emission requirements; transmitter performance and spurious emissions are typically addressed through radio regulations or specific test plans.

Lifecycle Relevance

• Supports early emission checks during automotive electronics development, especially for modules connected to vehicle power and communication lines.

• Helps evaluate whether components, harness configurations, and installation conditions could affect on-board radio or communication receivers.

• Remains relevant after PCB changes, supplier changes, harness modifications, software updates, or when preparing customer-specific EMC approval documentation.

Automotive EMC Testing

IB-Lenhardt provides testing of radio disturbance characteristics according to EN IEC 55025 / CISPR 25 and related automotive EMC requirements — from pre-compliance evaluations to component-level and system-level emission testing.

→ Learn more about our EMC Testing Services