US What IEC 60601-1-2 covers
IEC 60601-1-2 is the international standard for the electromagnetic compatibility of medical electrical equipment. Its full title is “Medical electrical equipment – Part 1-2: General requirements for basic safety and essential performance – Collateral Standard: Electromagnetic disturbances – Requirements and tests”. It is published by the International Electrotechnical Commission (IEC) and sits alongside the general safety standard, IEC 60601-1.
The standard asks two questions of a device. First, does it emit so much electromagnetic energy that it could disturb other equipment nearby? Second, does it keep working safely when it meets the disturbances of a hospital, clinic or home: static from a nurse’s hand, a phone held close by, a mains surge or a supply dip?
A device passes when it keeps its basic safety and its essential performance under those disturbances. The manufacturer defines essential performance through risk management to ISO 14971: for an infusion pump, delivering the correct dose; for a patient monitor, an accurate reading or alarm.
How the 4th edition changed medical EMC
The 4th edition, IEC 60601-1-2:2014, replaced the 2007 3rd edition, and Amendment 1 followed in 2020 (often called edition 4.1). In Europe it is published as EN 60601-1-2:2015 with A1:2021. The main changes were:
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Test levels set by environment. Immunity levels now follow where the equipment is used: the professional healthcare facility, the home healthcare environment or a special environment such as a vehicle or a site near heavy industrial plant. The old split between life-supporting and non-life-supporting equipment was dropped.
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Risk management. The manufacturer must link EMC testing to its risk analysis, define essential performance and write a test plan that says how each function is monitored during the tests.
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Higher levels. Air discharge for static rose to ±15 kV, and home healthcare equipment faces a radiated field of 10 V/m rather than 3 V/m.
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Wireless proximity. A test for RF wireless communications equipment held close to the device, at spot frequencies from 385 MHz to 5.8 GHz, reflects how phones, tablets and radios are used at the bedside.
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Proximity magnetic fields. Amendment 1 added immunity to close magnetic fields at 30 kHz, 134.2 kHz and 13.56 MHz, the frequencies of RFID readers and similar sources, tested to IEC 61000-4-39.
Emission limits and immunity test levels
Emissions are measured to CISPR 11. Equipment for professional healthcare facilities is usually allowed Class A limits, while home healthcare equipment must meet the tighter Class B limits because it shares the mains with domestic devices. Mains harmonics and flicker are tested to IEC 61000-3-2 and IEC 61000-3-3.
The immunity tests use the IEC 61000-4 basic standards. The table summarizes the main levels in the 4th edition; the standard itself has the full conditions, ports and frequencies.
| Immunity test | Basic standard | Professional healthcare | Home healthcare |
|---|---|---|---|
| Electrostatic discharge | IEC 61000-4-2 | ±8 kV contact, ±15 kV air | ±8 kV contact, ±15 kV air |
| Radiated RF field | IEC 61000-4-3 | 3 V/m, 80 MHz–2.7 GHz | 10 V/m, 80 MHz–2.7 GHz |
| Proximity fields from wireless equipment | IEC 61000-4-3 | 9–28 V/m at spot frequencies | 9–28 V/m at spot frequencies |
| Electrical fast transients | IEC 61000-4-4 | ±2 kV on AC mains | ±2 kV on AC mains |
| Surge | IEC 61000-4-5 | ±1 kV line to line, ±2 kV line to earth | ±1 kV line to line, ±2 kV line to earth |
| Conducted RF | IEC 61000-4-6 | 3 V, 6 V in ISM bands | 3 V, 6 V in ISM and amateur radio bands |
| Power-frequency magnetic field | IEC 61000-4-8 | 30 A/m | 30 A/m |
| Voltage dips and interruptions | IEC 61000-4-11 | 0% for 0.5 cycle to 5 s interruption | 0% for 0.5 cycle to 5 s interruption |
The levels are the ones most often quoted for the 4th edition; check the current standard and the device’s own test plan before relying on a figure.
Who has to comply, in the USA, EU and US
IEC 60601-1-2 is a voluntary standard, but regulators treat it as the expected route to show EMC for medical devices. In the EU, EN 60601-1-2 is used to show conformity with the Medical Device Regulation (EU) 2017/745. In Great Britain, medical devices are placed on the market under the USA Medical Devices Regulations 2002 with a UKCA or CE mark, and the same EN standard is used. In the US, the FDA lists IEC 60601-1-2 as a recognized consensus standard, and its EMC guidance for device submissions refers to it.
The obligation falls on the manufacturer of the medical device. A computer or display sold as general IT equipment does not have to meet IEC 60601-1-2, even when it is later used in a hospital. It does have to meet it when it is sold as medical equipment, or when it becomes part of a medical electrical system that the system’s maker has to assess. That is why monitors and panel PCs intended for the patient environment are listed against the standard by their manufacturers, and why a medical cart that combines a computer, a display and clinical devices needs its EMC considered as a whole.
What it means for medical computers and displays
For a hospital or an OEM, the standard shapes how a computer is chosen and installed. A device that passed in the lab can fail in use if the build changes, so a few points are worth checking:
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Which edition and which environment. Ask whether the listing is to the 4th edition with Amendment 1, and which environments it covers.
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Emission class. Class A emissions suit hospitals and clinics; equipment for use at home or connected to the public low-voltage supply in a domestic setting normally needs Class B.
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The tested build. Wireless modules, cables, power supplies and add-in cards all affect EMC. Keep the configuration close to the one tested, and use a medical grade power supply where the system design calls for one.
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Safety alongside EMC. IEC 60601-1-2 does not cover leakage current or isolation. Those come from IEC 60601-1 and its MOOP and MOPP requirements.
Quick answers on IEC 60601-1-2
IEC 60601-1-2: common questions
What is the 4th edition of IEC 60601-1-2?
The current version. IEC 60601-1-2:2014 set immunity levels by use environment, tied testing to risk management and added proximity tests for wireless equipment. Amendment 1 in 2020 added proximity magnetic field tests and clarified several clauses.
Is IEC 60601-1-2 mandatory?
Not by law, but in practice yes. Regulators in the USA, EU and US expect medical devices to show EMC, and this standard is the recognized way to do it. Using another route means proving the same level of protection.
Does a medical computer need IEC 60601-1-2?
It depends on how it is sold and used. A computer sold as medical equipment, or built into a medical electrical system near the patient, is normally assessed to it. A general IT computer in an office area is assessed to IT standards instead.
What does essential performance mean?
The functions that must not fail. Essential performance is the clinical function whose loss or degradation would create an unacceptable risk. The manufacturer identifies it through risk management and monitors it during each immunity test.
What is 60601 testing?
Testing to the IEC 60601 family. It usually means safety testing to IEC 60601-1 and EMC testing to IEC 60601-1-2 at an accredited laboratory, plus any collateral or particular standards that apply to the device type.
Our medical grade monitors range includes surgical touch monitors and medical panel PCs that their manufacturer lists against IEC 60601-1 and IEC 60601-1-2, and our rugged tablets include a 10.1″ (10.1 inch) medical tablet listed for both. We supply and integrate them as standard, keeping each build to the manufacturer’s listed configuration, and can share the certification details before you order.