Zergo Tool
NBTC Certification Checker
Enter your product's operating frequency to identify the likely NBTC certification path — SDoC, Class A (Registration), or Class B (Certification).
How NBTC Certification Works
All telecommunications and RF equipment sold or used in Thailand must be certified by the National Broadcasting and Telecommunications Commission (NBTC) before it enters the Thai market. The certification type required depends on the device's operating frequency, technology, and transmit power.
NBTC defines three certification paths, each with different requirements, timelines, and post-approval obligations.
The most straightforward path. The manufacturer declares conformity with the applicable NBTC technical standard. No NBTC trade license or supplier code is required at submission.
Approx. ~1 week from submission
Typical devices: Bluetooth accessories, Wi-Fi 6E equipment, DECT cordless phones, video transmitters, wireless microphones (165–210 MHz)
Required for devices with higher transmit power or operating in bands shared with other services. Approved products must display an NBTC label purchased from NBTC and carry a Registration Number.
Approx. ~5 weeks from submission
Typical devices: High-power RFID readers, Wi-Fi routers (5725–5850 MHz), UWB devices, RC model controllers, wireless microphones (694–806 MHz)
The most rigorous path, applying to cellular and licensed-band equipment. Approved products receive an Approval Certificate with an Approval Number and must display an NBTC label.
Approx. ~6 weeks from submission
Typical devices: Smartphones, LTE/5G modules, WCDMA equipment, cellular modems and terminal equipment
How Frequency Determines Certification
NBTC assigns each frequency band (or sub-band) to one or more "กิจการเฉพาะ" (specific telecommunications services or applications). Each application carries a prescribed certification type. This is why knowing your device's operating frequency is the essential first step.
For most devices, one frequency maps to one certification type. For split-path applications, the outcome depends on transmit power in addition to frequency — five NBTC applications follow this pattern: RFID, Non-RFID (IoT), Vehicle Radar, Wireless Microphone, and RLAN 5725–5850 MHz.
What the Checker Does Not Cover
This tool covers the 14 device categories on Zergo's Find by Device index. It does not cover licensed telecommunications services (marine radio, aeronautical, amateur radio, trunked radio systems) or devices requiring NBTC operator licensing rather than equipment certification.
Multi-radio devices — such as a smartphone with LTE, Wi-Fi, and Bluetooth — require a separate certification for each technology. The checker evaluates one frequency at a time.
Frequently Asked Questions
My device operates on multiple frequencies. Which do I check?
Check each frequency separately. Each radio technology in a multi-radio device — for example, LTE and Wi-Fi in a smartphone — is certified independently under its own NBTC application. The most restrictive certification type determines the overall project complexity.
The result shows SDoC or Class A. How do I know which applies?
This indicates a split-path application where transmit power is the deciding factor. Check the power threshold shown in the result. If your device's transmit power is at or below the threshold, SDoC applies. Above the threshold, Class A (Registration) is required.
Why does my frequency return more than one application?
Several frequency bands are shared between multiple NBTC applications — for example, 920–925 MHz is used by both RFID and Non-RFID (IoT) equipment. The applicable application depends on the technology in your device. Zergo can confirm the correct path during a Pre-Submission Review.
Is the checker result sufficient to begin testing?
The checker identifies the likely certification path. Before commissioning test reports, you should verify the applicable NBTC technical standard for your specific device type. Selecting the wrong standard means unusable test reports. Zergo's Pre-Submission Review covers this verification.
What is the difference between SDoC and a self-declaration?
SDoC stands for Supplier's Declaration of Conformity — NBTC's formal designation for what is sometimes called a self-declaration route. The manufacturer must still submit a complete application with valid test reports from an accredited laboratory; SDoC refers to the certification type, not a declaration filed in isolation.
Ready to Certify for Thailand?
Zergo manages the complete NBTC certification process — from document preparation and local representative appointment to submission and approval. Overseas manufacturers, laboratories, and certification agencies work with Zergo to bring telecommunications and RF equipment to the Thai market.