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ISO 7637

Electromagnetic compatibility vehicle standard

Wikipedia contributorsAdapted for Fathomly · View authors
1 min read
Source updated March 16, 2025

ISO 7637 Road vehicles -- Electrical disturbances from conduction and coupling is an international electromagnetic compatibility vehicle standard published by the International Organization for Standardization (ISO), that relates to 12- and 24-volt electrical systems. As of November 2018, four parts of ISO 7637 have been published, and one is in development (part 4):

  • ISO 7637-1 (last revised October 2015 (2015-10)) Definitions and general considerations
  • ISO 7637-2 (last revised March 2011 (2011-03)) Electrical transient conduction along supply lines only
  • ISO 7637-3 (last revised July 2016 (2016-07)) Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines
  • ISO 7637-4 Electrical transient conduction along shielded high voltage supply lines only
  • ISO 7637-5 (last revised November 2016 (2016-11)) Enhanced definitions and verification methods for harmonization of pulse generators according to ISO 7637

There are several distinct electrical transient waveforms that are required from this testing to ISO 7637-2. These pulses or waveforms include very high rise or fall times often in the nanosecond and microseconds range. These transients are designed to simulate electrical occurrences in operational environments, including a load dump simulation. ISO 7637 is referenced by many vehicle manufacturer standards and individual waveforms are modified to meet specific requirements. ISO 7637 includes both immunity and emissions components of electromagnetic compatibility testing. This standard, including ISO 7637-2, places specific requirements on test equipment that can be used to replicate electrical occurrences.

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This article is adapted from the Wikipedia article “ISO 7637”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.

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Related topics

List of common EMC test standards

The following list outlines a number of electromagnetic compatibility standards which are known at the time of writing to be either available or have been made available for public comment. These standards attempt to standardize product EMC performance, with respect to conducted or radiated radio interference from electrical or electronic equipment, imposition of other types of disturbance on the mains supply by such equipment, and the sensitivity of such equipment to received interference.

CISPR

The Comité International Spécial des Perturbations Radioélectriques was founded in 1934 to set standards for controlling electromagnetic interference in electrical and electronic devices and is a part of the International Electrotechnical Commission (IEC).

Electromagnetic interference

Electromagnetic interference, also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction. The disturbance may degrade the performance of the circuit or even stop it from functioning.