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Battery-Free NFC Passive Smart Lock from China - High-Reliability Access Control by Leading Suppliers & Factory
Product Overview
The 40NFC Passive Smart Padlock solves the pain points of traditional active smart locks (such as external power supply/battery dependency, complex maintenance, and poor anti-interference performance). It operates by harvesting energy from mobile phone NFC, achieving battery-free, maintenance-free, and high-reliability access control.
Product Models
| Model | Description |
|---|---|
| CRT-NSG200NFC | Plastic housing |
| CRT-NJG200NFC | Middle-frame metal housing |
| CRT-NSG200-J | Built-in mechanical lock cylinder |
Technical Specifications
| Parameter | Specification |
|---|---|
| Lock Beam Material | 304 Stainless Steel |
| Lock Body Material | ABS + PC |
| Working Voltage | 2.2V ~ 3.3V |
| Working Current | < 100mA |
| Operating Temp/Humidity | -40℃ ~ 80℃; 20% ~ 98% RH |
| Switching Cycles | ≥ 20,000 times |
| Power Supply | Mobile Phone NFC Energy Harvesting |
| Protection Level | IP65 |
| Unlocking Time | ≤ 2 seconds |
| Key Protection | National Cryptographic Standard 4 |
| Operating Distance | Tap Distance ≤ 1cm |
| Working Frequency | 13.56MHz |
| Core Features | Battery-free, Maintenance-free, High Reliability, Eco-friendly |
Precautions
- Align the mobile phone’s NFC area with the padlock’s NFC zone (marked "This side outward" on the lock body).
- The padlock harvests energy via NFC and receives the unlock command.
- Hold the lock body and pull down the lock beam to unlock.
Frequently Asked Questions
The padlock uses advanced NFC energy harvesting technology. It draws the required operating power directly from your mobile phone's NFC field when tapped, making it completely battery-free and maintenance-free.
There are three primary models: the CRT-NSG200NFC featuring a plastic housing, the CRT-NJG200NFC with a middle-frame metal housing, and the CRT-NSG200-J which includes a built-in mechanical lock cylinder.
Yes. The padlock is built with an IP65 protection level, uses durable 304 stainless steel for the lock beam, and is rated to operate in temperatures ranging from -40℃ to 80℃ and humidity levels up to 98% RH.
The padlock utilizes security standards that comply with the National Cryptographic Standard 4, ensuring high-reliability and strong protection against unauthorized access.
Once the mobile phone's NFC area is aligned with the padlock, the energy harvesting and command transfer occur rapidly, enabling unlocking in 2 seconds or less.
The operating frequency is 13.56MHz, and the effective tap distance for energy harvesting and communication is 1cm or less.