Auslock Super Slim S3B Smart Mortice Lock
The Auslock Super Slim S3B is a full mortice smart lock designed for modern timber and aluminium doors where a narrow, low-profile panel is essential. At just 33 mm wide and 280 mm tall, the S3B sits flush in the door stile rather than dominating it — while still delivering five access methods, Auslock App management, and optional remote access via the G2 or G3 Gateway. Available in Black, White/Silver, and White/Champagne Gold.
The S3B suits both hinged and sliding door configurations — handle direction is field-adjustable during installation. Three square shaft sizes (50, 57, and 67 mm) are included to accommodate the full 35–60 mm door thickness range without additional hardware. Note the S3B uses 4 × AAA batteries — smaller than the AA cells used in the H05 and H06.
If your door has a narrow frame or tight stile, explore our range of slim-profile smart locks for narrow-frame doors — covering different door types, backsets, and handle styles.
Key Features
- Ultra-slim 33 mm panel — purpose-built for narrow aluminium door stiles where standard mortice panels don't fit; suits stiles from approximately 33 mm
- Full mortice replacement — lever set and cylinder replaced in one kit; not a surface-mount or retrofit overlay
- Five access methods — fingerprint, PIN code, RFID card/tag, Bluetooth app, and mechanical backup key
- Hinged and sliding door compatible — field-adjustable handle direction; one of the few Auslock models to confirm sliding door compatibility
- Three shaft sizes included — 50, 57, and 67 mm square shafts cover the full 35–60 mm door thickness range without additional hardware
- High credential capacity — up to 200 fingerprints, 200 RFID cards/tags, 150 PIN codes stored on device
- Auto-lock and passage mode — configurable via the Auslock App
- USB-C emergency power port — front panel accepts a standard power bank if batteries are depleted
- Google Assistant and Amazon Alexa voice control (gateway required)
- Three finishes — Black; White/Silver; White/Champagne Gold
- 4 × AAA alkaline batteries — note AAA, not AA; low-battery alert below 4.8 V
- CE, FCC, RoHS certified
Available Finish Options
Black
STK AUSS3-
White / Silver
STK AUSS3 -
White / Champagne Gold
STK AUSS3
All three finishes are available on this listing. Finish selection does not affect functionality, compliance, or performance.
Access Methods
| Method | How It Works | Gateway Required? |
|---|---|---|
 Fingerprint |
Touch the sensor — up to 200 fingerprints. See fingerprint guidance. | No |
PIN Code |
Enter code + # — up to 150 codes; permanent, timed, one-time, recurring. See PIN guidance. | No |
 RFID Card / Tag |
Tap card or fob — up to 200; 3 RFID tags included. | No |
 Bluetooth App |
Auslock App (iOS and Android) — local unlock within ~5 m; share e-keys, view history. | No |
 Remote App (Wi-Fi) |
Lock/unlock from anywhere; remote credential management. | Yes — G2 or G3 (sold separately) |
 Backup Key |
Mechanical override — 2 keys included; keep one outside the premises. | No |
 Face Recognition |
Not available on this model. | N/A |
What's in the Box
- Front panel assembly (keypad and fingerprint sensor) ×1
- Back panel assembly (interior handle) ×1
- Mortice lock body ×1
- RFID key tags ×3; mechanical override keys ×2
- Strike plate ×1; strike box ×1
- Square shafts: 50 mm ×1, 57 mm ×1, 67 mm ×1 (three sizes for door thickness compatibility)
- Spring ×1; hexagonal wrench ×1
- Screw stubs M5×30 mm ×2; M5×35 mm ×2
- Sliding screw M5×11 mm ×1
- Mortice screws: M5×10 mm aluminium door ×4; M4×25 mm timber door ×4
- M5×25 mm ×1; M5×30 mm ×1; M5×40 mm ×1; M5×50 mm ×1; M5×60 mm ×1
- User manual
Suitable Uses
Auslock Slim Series — Full Range
The S3B is the narrowest panel in the Auslock slim lock family. If the 33 mm panel is too narrow for your door hardware or you need a wider escutcheon, the S31B series offers a broader panel with the same access methods. The S31B also uses SS304 stainless steel construction and IP66 rating for direct outdoor exposure.
| Model | SKU | Panel width | Door type | IP / Material | Finishes |
|---|---|---|---|---|---|
| Auslock Super Slim S3B (This Product) | STK AUSS3 | 33 mm | Hinged and sliding | IP55 / Aluminium alloy | Black, White/Silver, White/Champagne Gold |
| Auslock S31B — Hinged | STK AUSS31B-Hinged | 38 mm | Hinged doors only | IP66 / SS304 stainless | 5 colours |
| Auslock S31B — Sliding | STK AUSS31B-Slider | 38 mm | Sliding doors only | IP66 / SS304 stainless | 5 colours |
Full Specifications
| Specification | Detail |
|---|---|
| Model | Auslock Super Slim S3B |
| SKU | STK AUSS3 |
| Lock type | Full mortice (lever and cylinder replacement) |
| Handle material | ADC12 die-cast aluminium alloy |
| Panel material | Aluminium alloy |
| Panel dimensions | 280 mm height × 33 mm width; keypad face 124 mm; depth 22 mm |
| Door thickness | 35–60 mm (three shaft sizes included: 50/57/67 mm). See door thickness guide. |
| Door types | Timber and aluminium; hinged and sliding |
| Finishes | Black; White/Silver; White/Champagne Gold |
| Connectivity | Bluetooth (local); Wi-Fi via Auslock G2 or G3 Gateway (sold separately, 2.4 GHz) |
| App platform | Auslock App (iOS and Android) — not TTLock, not Tuya |
| Access methods | Fingerprint · PIN · RFID card/tag · Bluetooth App · Mechanical key |
| Fingerprint capacity | Up to 200 |
| PIN capacity | Up to 150 |
| Card/tag capacity | Up to 200 |
| Voice control | Amazon Alexa, Google Assistant (requires gateway) |
| Auto-lock | Yes — configurable via app |
| Passage mode | Yes — holds latch open; activate by unlocking first, then press-hold ★ key to cancel |
| Wrong PIN lockout | 5 consecutive wrong entries locks keypad for 5 minutes; other credentials still work |
| IP rating | IP55 (external panel). See IP ratings explained. |
| Power | 4 × AAA alkaline batteries (not included) — note AAA, not AA; low-battery alert below 4.8 V |
| Emergency power | USB-C port on front panel (power bank, not included) |
| Lock weight | 2.5 kg |
| Operating temperature | -10 °C to 55 °C |
| Operating humidity | 0–95% |
| Certifications | CE, FCC, RoHS |
| Reset procedure | Hold Reset button (back panel) 5 s, then enter 000# on keypad |
| Fire rating | None |
| DDA compliance | Not stated |
| Warranty | 12 months |
Dimensions
Confirm your door's stile width and backset before ordering. The S3B's 33 mm panel is the narrowest in the Auslock range — confirm there is sufficient stile material to seat the mortice body and fixing screws.
Battery, Power & Backup
The S3B runs on 4 × AAA alkaline batteries — not included. Use alkaline only; do not mix old and new cells and do not use rechargeable cells. The lock alerts when voltage drops below 4.8 V — replace all four cells together immediately when notified.
If batteries fully deplete, hold a USB-C power bank to the front panel port to provide temporary power — this activates the touchscreen to allow PIN entry and access. Keep a power bank accessible outside the property.
The mechanical backup key is a final failsafe independent of battery charge. Always keep one key at a secure off-site location.
Installation Video
Auslock has produced an installation guide for the S3B — the visual content is genuinely useful for understanding the shaft selection and clutch orientation steps. Watch on YouTube →
Also see Chapter 12 — when DIY is and isn't appropriate for mortice lock installations.
Remote App Access & Gateway
The S3B connects to the Auslock App via Bluetooth for local control within approximately 5 m. For remote access from anywhere — locking, unlocking, viewing history, managing credentials, voice control — an Auslock Gateway is required.
Auslock App
The S3B uses the Auslock App, available on iOS and Android. This is Auslock's own proprietary platform — not TTLock, not Tuya. The app supports multiple admin levels, e-key sharing, named access codes, scheduled and recurring codes, activity logs, and remote access when a gateway is connected.
Frequently Asked Questions
The panel is 33 mm wide — the narrowest in the Auslock range. Measure your stile face width: you need at least 33 mm of stile material for the panel to sit without overhang, plus adequate depth for the mortice body. Check your stile width and backset before ordering. If you're unsure, contact Terry's for a pre-purchase door assessment.
Permanent passcodes must be tested within 24 hours of creation, otherwise they auto-expire as a security measure. Create the code, test it immediately from the keypad, and it will remain active indefinitely. If it has already expired, delete it and recreate it — then test immediately.
The clutch triangle inside the spindle hub is installed in the wrong orientation. Remove the front panel, check the clutch direction marking against the installation diagram, refit with the arrow aligned correctly, and retest. This is the most common S3B installation error — the YouTube installation video shows the correct orientation. See also Chapter 12 — spindle installation mistakes.
4 × AAA alkaline — not AA. Use brand-name alkaline cells only; do not mix old and new, and do not use rechargeable cells. If you also own an H05 or H06, keep your battery stocks separate — those models use AA.
Voice control requires a G2 or G3 gateway connected and online. For Google Assistant, link via the ScienerSmart skill in the Google Home app. For Amazon Alexa, enable the ScienerSmart skill in the Alexa app and authorise with your Auslock account. Voice unlock requires a confirmation code — set this up in the app or Google Home settings. Locking by voice does not require a code.
Additional Information
The S3B (33 mm panel, aluminium alloy, IP55) is the right choice when panel width is the primary constraint — narrow stiles on timber or aluminium doors, either hinged or sliding. The S31B (38 mm panel, SS304 stainless, IP66) is the right choice when weather resistance and corrosion resistance matter more than minimum panel width — coastal installations, exposed hinged or sliding doors. See the S31B slim family table for a direct comparison.
The S3B uses the Auslock App — a distinct platform from TTLock or Tuya. If you need a lock that works with TTLock-based PMS or property management integrations, this is not the right product. Chapter 15 — Choosing an App Platform explains the distinction.
Permanent codes must be tested within 24 hours of creation or they auto-expire. Create the code, test it from the keypad immediately, and it will remain permanently active. Timed codes work well for guests — set the start time to check-in and expiry to 30–60 minutes after checkout. Verify the timezone in the app matches your property location before saving timed codes.
IP55 covers dust ingress and directional water spray on the external panel. Suitable for covered entries and porticos. Avoid direct rain and do not install on exposed outdoor gates. For full outdoor exposure consider the S31B Hinged (IP66, SS304). For detail on what IP ratings mean see Chapter 11 — IP ratings explained.
Warranty
12 months from date of sale covering defects in materials and electronic components under normal residential use. Does not cover misuse, improper installation, vandalism, or environmental exposure beyond the product's rated conditions. Terry's Locksmiths manages all Auslock warranty claims — contact us first and we'll handle it from there. This warranty operates alongside your rights under Australian Consumer Law.
PDF Downloads
Auslock Super Slim S3B User Manual (PDF)
Auslock App User Manual (PDF)
Auslock Alexa Setup Guide (PDF)
Auslock Google Home Setup Guide (PDF)
Auslock 2026 Product Catalogue (PDF)
For all resources visit the Auslock PDF Resources page.
What's in the Box — Auslock Super Slim S3B
- Front panel assembly (keypad and fingerprint sensor) ×1
- Back panel assembly (interior handle) ×1
- Mortice lock body ×1
- RFID key tags ×3; mechanical override keys ×2
- Strike plate ×1; strike box ×1
- Square shafts: 50 mm ×1, 57 mm ×1, 67 mm ×1
- Spring ×1; hexagonal wrench ×1
- Screw stubs M5×30 mm ×2; M5×35 mm ×2
- Sliding screw M5×11 mm ×1
- Mortice screws: M5×10 mm aluminium door ×4; M4×25 mm timber door ×4
- M5×25 mm ×1; M5×30 mm ×1; M5×40 mm ×1; M5×50 mm ×1; M5×60 mm ×1
- User manual
Auslock Super Slim S3B — Dimensions
Auslock Super Slim S3B — User Manual
Auslock Warranty
All Auslock products purchased through Terry's Tradies Pty Ltd (trading as Terry's Gold Coast Smart Locks and its associated websites and subsidiaries) are backed by a 12-month limited manufacturer's warranty. If something isn't right, contact us first — we manage all warranty assessments on your behalf and will work with you to get it resolved.
Warranty Summary
How to Make a Claim
- Contact Terry's Tradies Pty Ltd at your original place of purchase with a description of the fault.
- Have your proof of purchase ready (receipt or order confirmation).
- Provide clear photos and/or video of the defect — this is required before any assessment can begin.
- We may ask you to complete troubleshooting steps or a technical support form before the item is returned. Do not send the product back without our written approval.
- If the claim is approved, we will arrange the next steps with you directly — including return freight where applicable.
What the Warranty Doesn't Cover
The following are not covered under the Auslock manufacturer's warranty:
- Incorrect or improper installation
- Door or frame misalignment
- Incorrect mortise, latch, or backset selection
- Installation on doors outside the product's specifications
- Environmental exposure beyond the product's stated IP rating
- Water ingress not consistent with the product's IP rating
- Power surge, fire, flood, lightning, or other natural disaster
- Cosmetic damage or normal wear and tear
- Battery misuse or leakage
- Forced entry, vandalism, or tampering
- Unauthorised modification
- Use of non-Auslock components
- Commercial or high-traffic use (unless approved in writing)
Rechargeable battery products (Models A01, A02, A03, A519, A619): Battery-related damage is excluded where a non-certified charger, fast charger, incorrect voltage (outside 5.2V / 2A), third-party battery, or unsuitable charging environment has been used.
Change-of-Mind Returns
Change-of-mind returns are accepted at our discretion and subject to the manufacturer's return conditions. If you've changed your mind, contact us within 14 days of receiving your order and we'll let you know if a return is possible and what applies.
To be eligible, products must be:
- Unused and uninstalled
- Not powered on, activated, paired, programmed, or configured in any way
- In original, fully sealed condition with all packaging, accessories, and components
Where a return is approved, a 20% restocking fee applies and return shipping is at your cost. Products that have been installed, powered on, or had any credentials registered are not eligible for return.
Australian Consumer Law
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law (ACL). You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have goods repaired or replaced if they fail to be of acceptable quality and the failure does not amount to a major failure. Nothing in this policy limits or excludes your rights under the ACL.
It can be overwhelming with all the choices out there. We can help! We are experts with decades of experience in fitting locks of all types, not just Smart Locks. It is a free service we offer, and with just some photos and a few minutes of your time you can get expert advice and product recommendations tailored precisely to suit your needs.
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