TTLock Fingerprint Keypad Smart Lock Controller Module SN-503

TTLock App-Enabled Fingerprint Keypad Smart Lock Controller Module (SN-503)

Take full control of your door security with the Asia-Teco SN-503 Smart Lock Controller Module — a powerful DIY relay-based access control board compatible with the TTLock, Sciener, TTRENTING, and TTHOTEL app ecosystems. Whether you're upgrading a rental property, home office, or custom smart home build, this module delivers enterprise-grade access management in a compact, developer-friendly form factor.

Made in Mainland China.

Multiple Unlocking Methods

• Bluetooth Mobile App: Unlock via smartphone using Bluetooth 5.0 BLE — fast, low-power, and completely keyless.
• Fingerprint: Stores up to 120 fingerprints using a high-accuracy semiconductor sensor (FAR <0.001%).
• IC Card: Supports up to 1,000 Mifare One M-type IC cards for easy tap-to-open access.
• Password Keypad: Capacitive touch keypad supports up to 250 custom/permanent passwords plus unlimited dynamic one-time codes.
• Remote Control: Optional remote control unlocking supported (remote sold separately).
• Mechanical Key Override: Traditional key backup included for peace of mind.

Smart Access Management via App

Manage every aspect of your door lock from the TTLock / Sciener app on Android (4.3+) or iOS (7.0+). Distribute digital electronic keys (eKeys) remotely, set time-limited access windows, freeze or revoke access instantly, and review a full unlock log — all from your phone or via the Open API integrated into your own business management system.

• Assign expiration dates to passwords, fingerprints, IC cards, and eKeys
• Monitor all unlock events with time-stamped records
• Supports 20+ languages including English, Spanish, French, German, Russian, Japanese, Korean, Arabic, and more
• Cloud servers hosted on Alibaba Cloud and Amazon Cloud for reliability

Developer-Ready SDK & Open API

Build your own custom app or integrate with your existing property management platform using the iOS and Android SDK and the Open Platform API. Send eKeys and passwords, manage door lock associations, and pull unlock records programmatically — ideal for hotel, co-working, or rental property deployments.

Technical Specifications

• Model: SN-503
• Bluetooth: BLE 5.0 (Telink TLSR8251 chip)
• Voltage Range: 4.5V – 9V
• Power Supply: 4 × Alkaline AA batteries
• Standby Current: 100 µA
• Working Current: <200 mA
• Low Voltage Alert: 4.8V
• Unlock Time: ~1.5 seconds
• Fingerprint Capacity: 120 (semiconductor sensor)
• IC Card Capacity: 1,000 (Mifare One M)
• Password Capacity: 250 custom/permanent + unlimited dynamic OTPs
• Operating Temperature: -20°C to +70°C (-4°F to +158°F)
• Fingerprint False Acceptance Rate (FAR): <0.001%
• Fingerprint False Rejection Rate (FRR): <1.0%
• Smart Home Platform: Tuya
• Certification: CE
• Compatible Apps: TTLock, Sciener, TTRENTING, TTHOTEL
• Origin: Made in Mainland China

What's in the Box

• 1 × SN-503 Fingerprint Keypad Smart Lock Controller Module Board

For general guidance on home security best practices, visit the Cybersecurity & Infrastructure Security Agency. For smart device wireless standards and interoperability guidance, the NIST Internet of Things program provides helpful reference information.

Frequently Asked Questions

Q: Which smartphones are compatible with the TTLock fingerprint keypad module?

A: The SN-503 module is compatible with Android 4.3 and above, as well as iOS 7.0 and above. Download the TTLock or Sciener app from the App Store or Google Play, scan the QR code, or search directly in the APPGallery.

Q: Can I set time-limited access for guests or tenants?

A: Yes! Through the TTLock or Sciener app, you can assign a specific start and end time to any eKey, password, fingerprint, or IC card. Access is automatically disabled once the expiration window passes — ideal for short-term rentals, housekeepers, or contractors.

Q: How many users can this smart lock controller module support?

A: The SN-503 supports up to 120 fingerprints, 1,000 IC cards, 250 custom/permanent passwords, and unlimited dynamic one-time passwords — making it suitable for residential, commercial, and hospitality applications.

Q: Does this module work with Tuya or other smart home platforms?

A: Yes, the SN-503 is compatible with the Tuya smart home platform in addition to TTLock/Sciener. It also supports custom integration via the provided iOS/Android SDK and Open Platform API.

Q: What power source does the SN-503 smart lock module use?

A: The module is powered by 4 standard alkaline AA batteries. It operates within a voltage range of 4.5V–9V with an ultra-low standby current of just 100 µA, ensuring long battery life. A low voltage alert activates at 4.8V so you're notified before power runs out.