CISPR 25 (EMC for Vehicle Electronics)
CISPR 25 is the international standard limiting electromagnetic interference (EMI) from electrical devices installed on vehicles. A Class 3–5 rated lamp will not disturb radios, GPS guidance or telematics in the cab.
Every switching LED driver emits some electrical noise. On a modern machine — GPS auto-steering, ISOBUS, two-way radios, telematics — an unsuppressed lamp can inject static into all of them. CISPR 25 defines how much conducted and radiated emission is acceptable, graded in classes 1–5 (higher is quieter).
Why it matters on machinery
Fleet complaints about “GPS drops out when the work lights are on” trace back to non-compliant drivers. Lights engineered to CISPR 25 Class 4–5 operate electronically quiet, protecting against EMI without interfering with on-board electronics.
How to specify
Ask for the CISPR 25 class in writing, alongside ECE R10 e-marking (the EU regulatory implementation of vehicle EMC). Our work lights carry CISPR 25 Class 4–5 suppression as standard — see the full LED work light range.
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Related terms
ECE regulations (shown by an E-Mark) govern vehicle lighting in Europe and most of the world; DOT/FMVSS 108 and SAE standards govern the United States. The right certification depends on the destination market and whether the lamp is road-facing.
Potted DriverA potted driver is a lamp’s electronic driver circuit fully encapsulated in resin (potting compound), protecting it against vibration, moisture and thermal cycling — the three killers of vehicle lamp electronics.
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