TTLock SN-503 Fingerprint Bluetooth RFID Smart Door Lock Module
TTLock SN-503 Fingerprint Bluetooth RFID Smart Door Lock Module
TTLock SN-503 Fingerprint Access Control Module – Smart Bluetooth Door Lock
Upgrade your home or rental property with the TTLock SN-503 Fingerprint Access Control Switch Module. This advanced smart lock module combines fingerprint recognition, RFID IC card access, Bluetooth 5.0 BLE connectivity, and app-based management into one powerful, easy-to-install solution. Whether you're managing a single home, a vacation rental, or a small hotel, the SN-503 delivers seamless, keyless entry with enterprise-grade control — all from your smartphone. Made in Mainland China.
Key Features
- 6 Unlocking Methods: App, password, fingerprint, IC card, mechanical key, or remote control — ultimate flexibility for every user.
- Bluetooth 5.0 BLE: Low-power, fast, and reliable wireless connection to your Android (4.3+) or iOS (7.0+) smartphone.
- High-Precision Fingerprint Sensor: Semiconductor fingerprint sensor with a false recognition rate (FAR) of <0.001% and a rejection rate (FRR) of <1.0%. Stores up to 120 fingerprints.
- Large RFID Card Capacity: Supports up to 1,000 Mifare One M IC cards — ideal for multi-tenant or hospitality environments.
- Password Management: Store up to 250 custom & permanent passwords, plus unlimited dynamic one-time passwords.
- Time-Limited Electronic Keys: Set precise start and end times for app eKeys, passwords, IC cards, and fingerprints — perfect for short-term rentals.
- Unlock Record Monitoring: Every access event is logged and synced to the administrator app the moment the device connects to the network.
- Remote Key Distribution: Send, freeze, or revoke electronic keys to tenants or guests instantly from anywhere in the world.
- Open SDK & API: Full iOS and Android SDK plus an open platform API for seamless integration with property management systems.
- Multi-Language App Support: Compatible with TTLock, Sciener, TTRENTING, and TTHotel apps in 20+ languages.
- Firmware Upgradeable: Future-proof your investment with over-the-air firmware updates that expand software features.
Technical Specifications
| Model | SN-503 |
| Bluetooth Standard | Bluetooth 5.0 BLE (Telink TLSR8251 chip) |
| Fingerprint Capacity | 120 fingerprints |
| IC Card Capacity | 1,000 Mifare One M cards |
| Password Capacity | 250 custom/permanent + unlimited dynamic |
| Unlocking Time | 1.5 seconds |
| Power Supply | 4 × alkaline dry batteries |
| Voltage Range | 4.5 V – 9 V |
| Low Voltage Alarm | 4.8 V |
| Standby Current | 100 µA |
| Working Current | <200 mA |
| Operating Temperature | -20 °C to +70 °C |
| Key Type | Capacitive touch button |
| Compatible OS | Android 4.3+ / iOS 7.0+ |
| Country of Origin | Mainland China |
Compatible Apps & Platforms
The SN-503 works with the TTLock, Sciener, TTRENTING, and TTHotel apps, available on the Apple App Store and Google Play. Cloud infrastructure is hosted on both Alibaba Cloud and Amazon Cloud for global reliability and speed.
Who Is This For?
- Smart home owners seeking a keyless, app-controlled entry solution
- Airbnb & short-term rental hosts who need time-limited guest access
- Small hotel and property managers requiring centralized lock management
- Integrators and developers building custom access control applications using the open SDK/API
Learn More About Smart Home Security Standards
For general guidance on home security and consumer product safety, visit the U.S. Consumer Product Safety Commission (CPSC).
Frequently Asked Questions
Q: What unlocking methods does the TTLock SN-503 module support?
A: The SN-503 supports six unlocking methods: smartphone app (via Bluetooth), numeric password, fingerprint, RFID IC card, mechanical key backup, and remote control (remote control sold separately). You can use any combination of these methods depending on your setup and preferences.
Q: Can I manage multiple users and set time-limited access with this smart lock module?
A: Yes. The TTLock SN-503 allows you to create up to 120 fingerprint profiles, 1,000 IC cards, and 250 permanent or custom passwords, plus unlimited dynamic one-time passwords. Every credential — including app eKeys — can be assigned a specific start and end time, making it ideal for rental properties, guest access, and hospitality environments.
Q: Does the TTLock module require a Wi-Fi gateway or internet connection to function?
A: The SN-503 operates via Bluetooth 5.0 BLE, so basic unlocking (fingerprint, IC card, password, mechanical key) works without any internet connection. For remote key distribution, real-time unlock record syncing, and remote control unlocking, a Wi-Fi gateway (sold separately) or an active internet connection via the TTLock app is recommended.
Q: Is the TTLock SN-503 compatible with my phone?
A: The module is compatible with Android 4.3 and above, as well as iOS 7.0 and above. The companion apps (TTLock, Sciener, TTRENTING, TTHotel) can be downloaded free of charge from the Apple App Store or Google Play Store.
Q: Can developers integrate this module into their own property management system?
A: Absolutely. LUCKING DOOR provides a full SDK for both iOS and Android, as well as an open REST API platform. This allows software developers and system integrators to embed door lock management — including key issuance, access log retrieval, and remote control — directly into custom property management or hotel management applications.