Certification and Registration
Introduction to FCC Part 18
Category:
U.S. FCC
FCC Part 18, also known as 47 CFR Part 18 of the U.S. FCC regulations, specifies the electromagnetic interference requirements for Industrial, Scientific, and Medical (ISM) radio-frequency equipment, including conducted and radiated emissions. This regulation applies to ISM devices and controls their emitted electromagnetic energy to prevent harmful interference with authorized wireless communication services.
FCC Part 18 Applicable Products - Industrial, Scientific, and Medical (ISM) Equipment:
Devices or apparatus designed to generate and use local radio-frequency energy for industrial, scientific, medical, domestic, or similar purposes, excluding applications in the telecommunications field. Typical ISM applications produce physical, biological, or chemical effects, such as heating, gas ionization, mechanical vibration, hair removal, and charged particle acceleration. ISM equipment includes: industrial heating equipment (for example, radio-frequency welders and radio-frequency lighting equipment), medical diathermy equipment, ultrasonic equipment, consumer ISM equipment (for example, household microwave ovens, jewelry cleaners, and ultrasonic humidifiers), magnetic resonance imaging equipment, etc.(Note: FCC Part 18 products use the FCC certification method.)
ISM Device-specific frequency band
|
ISM Frequency |
Tolerance |
|
6.78MHz |
±15.0 kHz |
|
13.56MHz |
±7.0 kHz |
|
27.12MHz |
±163.0 kHz |
|
40.68MHz |
±20.0 kHz |
|
915MHz |
±13.0 MHz |
|
2450MHz |
±50.0 MHz |
|
5800MHz |
±75.0 MHz |
|
24.125GHz |
±125.0 MHz |
|
61.25GHz |
±250.0 MHz |
|
122.50GHz |
±500.0 MHz |
|
245.00GHz |
±1.0 GHz |
Prohibited frequency band
Operation of ISM equipment is prohibited in the following safety, search, and rescue frequency bands:
490-510 kHz, 2170-2194 kHz, 8354-8374 kHz, 121.4-121.6 MHz, 156.7-156.9 MHz, and 242.8-243.2 MHz.
ISM device RE (Radiated Emission) limits:
ISM devices are permitted to radiate unlimited energy within the designated frequency bands mentioned above; outside these bands, they must comply with the limits specified in the table below.
|
Device Type |
Operating frequency |
Radio Frequency Power (Watts) |
Field strength limit (μV/m) |
Test distance (m) |
|
Unless otherwise specified, any type (miscellaneous) |
Any ISM frequency |
<500 |
25 |
300 |
|
≥500 |
 |
300¹ |
||
|
Any non-ISM frequency |
<500 |
15 |
300 |
|
|
≥500 |
 |
300¹ |
||
|
Industrial heaters and radio-frequency-stabilized arc welding machines |
≤5725MHz |
Any |
10 |
1600 |
|
>5275MHz |
Any |
² |
² |
|
|
Medical diathermy equipment |
Any ISM frequency |
Any |
25 |
300 |
|
Any non-ISM frequency |
Any |
15 |
300 |
|
|
Ultrasonic equipment |
<490kHz |
<500 |
2400/F(kHz) |
300 |
|
|
≥500 |
 |
30³ |
|
|
490-1600kHz |
Any |
2400/F(kHz) |
30 |
|
|
>1600kHz |
Any |
15 |
30 |
|
|
Induction cooker |
<90kHz |
Any |
1500 |
30 ⁴ |
|
≥90kHz |
Any |
300 |
30 ⁴ |
|
|
1The field strength at 11,600 m shall not exceed 10 μV/m. Consumer equipment operating below 1000 MHz shall not increase the field strength; otherwise, power levels exceeding 500 W are permitted. 2 Minimize as much as possible. 3 The field strength at 1,600 m shall not exceed 10 μV/m. Consumer equipment shall not increase the field strength; otherwise, power levels exceeding 500 W are permitted. 4 Electric furnaces manufactured before February 1, 1980 shall comply with the field strength limits for miscellaneous ISM equipment. |
||||
For radio-frequency lighting equipment, RE (Radiated Emission) limits are as follows:
|
FCC Part 18.305(c). Radiated Emission Limits. RF lighting devices Radiofrequency Lighting Equipment Emission Limits |
||
|
Equipment |
Frequency (MHz) |
30 Electric field strength limit at the meter position (μV/m) |
|
Non-consumer devices |
30-88 |
30 |
|
88-216 |
50 |
|
|
216-1000 |
70 |
|
|
Consumer devices |
30-88 |
10 |
|
88-216 |
15 |
|
|
216-1000 |
20 |
|
ISM of the device CE Conduction limit:
All induction cookers and ultrasonic devices
|
FCC Part 18.307(a) Conducted emission limits for induction cookers and ultrasonic devices |
||
|
Transmission frequency (MHz) |
Conduction limit (dBμV) |
|
|
Quasi-peak |
Average value |
|
|
0.009-0.05 |
110 |
- |
|
0.05-0.15 |
90-80 |
- |
|
0.15-0.5 |
66-56 |
56-46 |
|
0.5-5 |
56 |
46 |
|
5-30 |
60 |
50 |
Other consumer-type equipment in Part 18
|
FCC Part 18.307(b) Part 18 Conducted emission limits for other consumer devices in the standard |
||
|
Transmission frequency (MHz) |
Conduction limit (dBμV) |
|
|
Quasi-peak |
Average value |
|
|
0.15-0.5 |
66-56 |
56-46 |
|
0.5-5 |
56 |
46 |
|
5-30 |
60 |
50 |
Radiofrequency lighting equipment
|
FCC Part 18.307(c) Conducted Emission Limits for Radio-Frequency Lighting Equipment |
|||
|
Equipment |
Frequency (MHz) |
Use 50 µH/50 Ω LISN Maximum measured RF line voltage (uV) |
Use 50 µH/50 Ω LISN Maximum measured RF line voltage (dBuV) |
|
Non-consumer devices |
0.45-1.6 |
1000 |
60 |
|
1.6-30 |
3000 |
69.5 |
|
|
Consumer devices |
0.45-2.51 |
250 |
48 |
|
2.51-3.0 |
3000 |
69.5 |
|
|
3.0-30 |
250 |
48 |
|
Conducted interference test equipment
Radiation interference test equipment
In addition to the United States, other countries and regions also have corresponding regulations for electronic products. EMC requirements vary by market. SATISFY offers EMC testing services worldwide to help you meet these diverse regulatory requirements.
|
Country / Region |
Authentication |
Test Requirements |
|
International |
CISPR/IEC |
|
|
Europe |
CE |
 |
|
United States |
FCC |
 |
|
Canada |
IC |
 |
|
Australia / New Zealand |
RCM/C-Tick |
 |
|
China |
CCC |
 |
|
South Korea |
KCC/MSIP |
 |
|
Japan |
PSE/VCCI |
 |
Appendix: FCC Part 15 Related categories, EMC Standards and Certification Methods Summary
FCC Part 18 – Industrial, Scientific and Medical Equipment (ISM): Radiofrequency equipment for industrial, scientific, and medical applications.
FCC ID – Certification Authentication
FCC MP-5-1986 – Methods of Measurement of Radio Noise Emissions from Industrial, Scientific and Medical (ISM) Equipment
SATISFY will leverage its expertise and experience to provide high-quality EMC certification services for ISM product categories, helping your products enter the U.S. market and other major markets smoothly. Please contact SATISFY customer service for more information.
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