NBTC Certification Types
All telecommunications and RF equipment sold or imported into Thailand must obtain NBTC certification before entering the market. NBTC recognises three certification types — SDoC, Class A, and Class B — each covering a different segment of the RF spectrum and device category.
The applicable certification type is determined by the device's frequency band, transmit power, and technology — not by the device's commercial name or form factor.
Supplier's Declaration of Conformity
Self-declaration for low-power, short-range devices
SDoC is a self-declaration pathway available for telecommunications and RF equipment that operates within defined low-power, short-range parameters. The manufacturer or supplier declares conformity with the applicable NBTC technical standard without a formal NBTC review process.
Key points
- No NBTC trade license or supplier code required at submission
- Fastest approval pathway — approximately 1 week from submission
- Product must carry a conformity statement referencing the applicable NBTC technical standard
- No physical sample submission required
Example device types
- Wi-Fi / Bluetooth devices (2.4 GHz)General / RFID / RLAN / UAS, ≤ 100 mW eirp
- Wi-Fi 5 GHz (5150–5725 MHz)General / RFID / RLAN, ≤ 200–1000 mW eirp by band
- Wi-Fi 6E (5925–6425 MHz)RLAN WiFi 6E, indoor conditions apply
- UAS / Drone (433 MHz, 2.4 GHz, 5.8 GHz)UAS (Drone) application
- Low-power RFID (13.56 MHz)≤ 10 mW eirp
- Cordless Telephone (1900–1906 MHz)≤ 10 mW eirp
- Wireless Microphone (165–210 MHz)FM band, ≤ 10 mW eirp — SDoC path
- Low-power Radar (5.8 GHz, 10 GHz, 76–81 GHz)≤ 10 mW eirp
Device type classification is determined by frequency band and transmit power. Use the Checker for a preliminary assessment, or browse by device type.
Registration
Registration for medium-power and unlicensed spectrum devices
Class A Registration applies to telecommunications and RF equipment that exceeds the SDoC power thresholds or operates under conditions requiring NBTC registration. An NBTC trade license and supplier code are required for submission, and Zergo's in-house local representative holds both.
Key points
- NBTC trade license and supplier code required (Zergo's in-house local rep provides these)
- Formal NBTC registration process — approximately 5 weeks from submission
- Approved products must display an NBTC label purchased directly from NBTC
- No physical sample submission required
Example device types
- High-power RFID (920–925 MHz)> 50 mW eirp, up to 4,000 mW eirp
- Non-RFID devices (920–925 MHz)> 50 mW eirp — Class A path
- Wireless Microphone (694–806 MHz)UHF band, ≤ 50 mW — Class A path
- Drone (24 GHz)24050–24250 MHz, ≤ 100 mW eirp
- Ultra-wideband (UWB)1600–10600 MHz, limit curve
- 60 GHz WLAN / WPAN Short Range Devices57–66 GHz, ≤ 10,000 mW eirp
- Vehicle Radar (76–81 GHz)High-power bands — Class A path
- RLAN (5725–5850 MHz) — high-power condition> SDoC threshold, Class A path
Device type classification is determined by frequency band and transmit power. Use the Checker for a preliminary assessment, or browse by device type.
Certification
Type approval for licensed spectrum and high-power equipment
Class B Certification (type approval) applies to telecommunications and RF equipment that operates in licensed spectrum bands or at higher power levels requiring full NBTC approval. This is the most comprehensive certification pathway and covers mobile network devices, professional radio equipment, and infrastructure.
Key points
- NBTC trade license and supplier code required (Zergo's in-house local rep provides these)
- Full NBTC type approval process — approximately 6 weeks from submission
- Approved products must display an NBTC label purchased directly from NBTC
- No physical sample submission required
Example device types
- LTE / 4G devices and base stationsMultiple licensed bands (700–2600 MHz)
- 5G NR devices and base stationsSub-6 GHz and mmWave (700 MHz – 27.5 GHz)
- WCDMA / 3G devicesLicensed cellular bands
- GSM devices and base stations880–960 MHz, 1710–1990 MHz
- VHF/UHF Land Mobile Radio30–960 MHz, up to 60 W base station
- Marine VHF156–162 MHz, up to 50 W coastal station
- Amateur Radio ServiceMultiple HF/VHF/UHF bands, up to 200 W
- Aeronautical Mobile Service117.975–137 MHz
Device type classification is determined by frequency band and transmit power. Use the Checker for a preliminary assessment, or browse by device type.
Side-by-side comparison
The table below summarises the key differences between the three NBTC certification types. Timelines are estimates from the date of complete submission; additional time may be required if NBTC requests supplementary documents.
| Feature | SDoC | Class A | Class B |
|---|---|---|---|
| Full name | Supplier's Declaration of Conformity | Registration | Certification |
| Typical device category | Low-power, short-range | Medium-power, unlicensed spectrum | Licensed spectrum, high-power |
| Approval timeline (est.) | ~1 week | ~5 weeks | ~6 weeks |
| NBTC trade license required | No | Yes | Yes |
| NBTC supplier code required | No | Yes | Yes |
| Physical sample required | No | No | No |
| NBTC label required post-approval | No | Yes | Yes |
| Approval document issued | SDoC document + reference number | Certificate of Registration + Registration Number | Approval Certificate + Approval Number |
* Timeline estimates are from the date of complete submission and assume no requests for supplementary documents from NBTC.
Split-path applications
Most device types fall under a single certification type. However, five application categories have a split path — meaning the applicable certification type depends on the specific frequency band or transmit power of the device:
- RFID — SDoC or Class A depending on transmit power (three frequency bands)
- Non-RFID (920–925 MHz) — SDoC or Class A depending on transmit power
- Vehicle Radar — SDoC only at 24050–24250 MHz (≤ 10 mW eirp); Class A for all other Vehicle Radar bands
- Wireless Microphone — SDoC at 165–210 MHz (FM); Class A at 694–806 MHz (UHF)
- RLAN (5725–5850 MHz) — SDoC or Class A depending on conditions
For all other applications, a single certification type applies across all listed frequency bands.
Documents required for all certification types
Regardless of certification type, all NBTC applications require the following supporting documents. No physical product sample is required for any pathway.
Not sure which certification type applies?
Use the NBTC Certification Checker for a preliminary classification based on frequency band, technology, and transmit power — or contact Zergo for a consultation.
Ready to proceed? See how the certification process works →