IoT Device NBTC Certification

IoT devices sold in Thailand require NBTC certification for each wireless technology they incorporate. The NBTC-specific application for IoT wireless communication at 920–925 MHz is the Non-RFID application, where the certification type — SDoC or Class A — depends on transmit power. Devices using Wi-Fi or Bluetooth are certified under separate applications.

920 MHz Band: The Non-RFID Application

The 920–925 MHz band is the primary sub-GHz IoT band in Thailand, used by protocols such as LoRa, LoRaWAN, Sigfox, and proprietary LPWAN technologies. The NBTC classifies these under the Non-RFID application, governed by NBTC TS 1033-2560. Certification is split by transmit power:

Application	Frequency Range	Transmit Power	Max Transmit Power	Certification	Standard
Non-RFID	920–925 MHz	≤ 50 mW eirp	50 mW eirp	SDoC	NBTC TS 1033-2560
Non-RFID	920–925 MHz	> 50 mW eirp	4,000 mW eirp	Class A	NBTC TS 1033-2560

Most IoT end-nodes qualify for SDoC: LoRa and LPWAN end-nodes typically transmit at 20–25 mW eirp, well below the 50 mW threshold. Gateway equipment or high-power fixed nodes transmitting above 50 mW require Class A registration instead.

Other Wireless Technologies in IoT Devices

Many IoT devices incorporate multiple wireless technologies in addition to 920 MHz. Each technology is certified under its own NBTC application. If your IoT device includes any of the following, see the relevant page for certification requirements:

Wi-Fi (2.4 GHz, 5 GHz, or 6 GHz): Certified under the RLAN application — see the Wi-Fi Router & Access Point page. Most Wi-Fi IoT devices qualify for SDoC.
Bluetooth: Certified under the Non-specific application for the 2400–2500 MHz band — see the Bluetooth Device page. All Bluetooth devices require SDoC only.
RFID (including NFC): Devices with integrated RFID readers or NFC are certified under the RFID application — see the RFID Device page.

When a single device incorporates multiple wireless technologies, a single NBTC application covers all of them. The certificate class is determined by the highest applicable class among all technologies in the device.

What This Covers

The Non-RFID 920 MHz application covers IoT devices using sub-GHz wireless for sensor data, telemetry, and control applications. Typical products include:

LoRa and LoRaWAN end-node sensors (temperature, humidity, energy, water)
LoRaWAN gateways and concentrators
Sigfox and proprietary LPWAN modules and devices
Smart metering devices (electricity, gas, water)
Industrial IoT sensors and wireless controllers
Agricultural monitoring systems
Asset tracking devices using 920 MHz

Required Documents

Document requirements depend on the certification type applicable to your device.

SDoC (≤ 50 mW eirp)

Technical specification / datasheet with wireless communication details
Product photographs (exterior and label)
Test report from an accredited laboratory
Authorised declaration (manufacturer or authorised representative)

Class A (> 50 mW eirp)

Technical specification / datasheet with wireless communication details
Product photographs (exterior and label)
Test report from an accredited laboratory outside Thailand
ISO/IEC 17025 accreditation certificate and laboratory scope
Authorised declaration (manufacturer or authorised representative)

Class A registration requires a local representative — a Thai juristic person holding a valid NBTC trade license and NBTC Supplier Code — to file on behalf of the overseas manufacturer. Zergo provides this as part of its certification service.

Estimated Timeline

SDoC (≤ 50 mW):Approximately 1 week from submission

Class A (> 50 mW):Approximately 5 weeks from submission

Also uses 920–925 MHz band

RFID Device

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IoT devices often include Bluetooth

Bluetooth Device

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Ready to certify your IoT device for Thailand?

Zergo manages the full NBTC certification process for IoT devices — including multi-technology applications, power-threshold determination, local representative filing, and approval delivery.

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