S4A-S1K European Standard Smart Lock Cylinder (TTLock)
S4A-S1K, Euro Profile DIN Standard, Adjustable 35-90mm, Aluminum Alloy/Brass, TTLock App, PIN, Card, Key, CR123A
The S4A-S1K is an adjustable European standard smart lock cylinder that upgrades conventional mechanical Euro profile door locks into advanced digital access points with TTLock Bluetooth app control, touch passcode, IC cards, and laser-cut emergency keys.
Product Overview
Engineered for seamless 5-minute retrofitting without altering door carpentry or replacing existing lock mortises, the S4A-S1K replaces standard profile cylinders across residential and commercial doors. Powered by a single high-capacity CR123A lithium cell, it provides over a year of reliable access with IP5x dust and splash resistance.
Why Buy This Product
5-Minute Retrofit
Swap out your old mechanical euro cylinder with a single retaining screw; no drilling required.
Adjustable Length Fit
Modular spacers accommodate various door thicknesses from 35mm to 90mm with ease.
TTLock eKey Sharing
Manage access permissions, send temporary guest PINs, and review unlock history via smartphone.
Best for These Applications
Security Euro Profile Doors
Upgrade front entry doors without changing the original architectural handles or multi-point mortise.
Rental & Leased Offices
Ideal for leased buildings where doors cannot be drilled or permanently modified.
Key Advantages
- Preserves Original Hardware:Keep existing high-end door handles and multi-point lock bodies fully intact.
- Offline Passcode Generation:Send valid time-limited entry codes to guests or contractors from anywhere in the world.
Frequently Asked Questions
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Weight | 0.65 |
| Shipping Weight | 0.85 |
| Cylinder Standard | Euro Profile DIN Standard |
| Adjustable Length | Yes |
| Cylinder Length Total | 60 mm to 120 mm adjustable |
| Internal Length | 30-60 mm |
| External Length | 30-60 mm |
| Applicable Door Thickness | 35-90 mm |
| Lock Core Grade | European Class C Anti-Pick Core |
| Unlock Methods | TTLock App, Passcode, IC Card (13.56MHz), Mechanical Key |
| Card Capacity | 100 |
| Passcode Capacity | 100 |
| Rfid Frequency | 13.56MHz Mifare |
| Emergency Mechanical Key Support | Yes |
| Mechanical Key Count | 2 |
| Anti Drill Plate | Yes |
| Wireless Protocol | Bluetooth BLE 5.0 |
| App Support | TTLock, TTHotel |
| Remote Unlocking | Yes |
| Battery Type | 1x CR123A Lithium 3V Battery |
| Battery Life | 8-12 months (approx. 8,000 unlocks) |
| Emergency Power Port | Type-C USB Jumpstart Port |
| Low Battery Warning | Yes |
| Body Material | Solid Brass Cylinder Core |
| Knob Material | Aviation Aluminum Alloy |
| Front Knob Dimensions | Diameter 42 mm, Length 46 mm |
| Rear Knob Dimensions | Diameter 34 mm, Length 30 mm |
| Ip Rating | IP5x (Dust and Splash Resistant) |
| Operating Temp | -25°C to 55°C |
| Operating Humidity | 10% to 90% RH |
| Stock | 2 |
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