2026-10-15
Both a Tuya Bluetooth fingerprint padlock and a Tuya Bluetooth fingerprint chain lock unlock in 0.3s with the Tuya Smart app. The real difference is the shape of what you are locking. This guide helps OEM buyers pick the right form factor.
Looking for this in bulk or with your brand?
OEM branding, 24h reply, free evaluation units for qualified buyers.
A Tuya Bluetooth fingerprint padlock and a Tuya Bluetooth fingerprint chain lock run the same core: a capacitive fingerprint sensor, a Bluetooth radio, a rechargeable cell and a Tuya Smart app profile. Unlock speed, app features and fingerprint capacity are effectively identical.
So the decision is not about electronics at all. It is a mechanical question: what are you trying to hold shut?
Ask a single question before requesting a quote:
> Does the thing I am locking have a standard hasp, latch or shackle hole — or does it need to wrap around something?
If the answer is "there is a hole or a latch", a padlock is almost always correct. If the answer is "I need to go around a post, a wheel, a gate leaf or another object", a chain lock is the only design that works.
A padlock drops into existing hardware. That is its biggest advantage — no new brackets, no new anchor points.
Typical padlock applications:
Padlocks are smaller, lighter and cheaper to ship. For a buyer ordering thousands of units, the freight and unit-cost difference is not trivial.
A chain lock solves the problem a padlock cannot: there is nothing to lock into.
Typical chain lock applications:
The chain is also a visual deterrent. A thick chain reads as "secured" from a distance in a way a small padlock body does not.
| Question | Padlock | Chain lock |
|---|---|---|
| Locking into a hasp or latch? | Yes — best choice | Awkward |
| Wrapping around a pole or wheel? | No | Yes — best choice |
| Standard mounting hardware exists? | Yes | Not needed |
| Need to reach around two objects? | No | Yes |
| Unit cost and shipping weight | Lower | Higher |
| Visual deterrent from a distance | Moderate | Strong |
| Fingerprint + Tuya app features | Identical | Identical |
Fingerprint sensor quality. Ask for the false-accept and false-reject rates, and how the sensor behaves with wet, cold or dusty fingers. A 0.3-second unlock claim means nothing if the sensor fails on a rainy morning.
Tuya app integration. Confirm whether the lock joins the Tuya ecosystem as a standard profile or as a custom device. A standard Tuya profile means your customers get app sharing, temporary access and unlock logs without you writing a single line of app code.
Battery and charging. Look for USB-C charging, a real standby figure measured in months, and a low-battery warning that reaches the app — not just an LED.
Outdoor rating. For outdoor deployment, IP65 is the practical minimum: dust-tight and protected against low-pressure water jets. Ask what happens to the fingerprint sensor area specifically.
Mechanical strength. Shackle material and diameter for padlocks; chain link diameter and sleeve material for chain locks. Both should be specified in the datasheet, not described as "heavy duty".
Both form factors can be branded. Typical OEM work covers:
Because the electronics are shared, developing both a padlock and a chain lock as a product family costs far less than developing two separate platforms. If your market needs both, tell your supplier up front — the shared core is where the saving is.
Can one fingerprint open both a padlock and a chain lock? Yes, if both are enrolled on the same Tuya account through the same app profile. Each lock stores its own fingerprint templates, but the app manages them together.
Do these locks need a gateway or hub? No. They pair directly with a phone over Bluetooth. The Tuya app works as soon as the phone is in range.
How many fingerprints can be stored? Most designs store between 20 and 100 templates. Confirm the exact figure with your supplier — it matters for shared lockers and for families.
What happens if the battery dies? A charged power bank on the emergency contacts restores power long enough to unlock. Keep the mechanical emergency key option if your customers operate in remote locations.
Can we get both shapes under one certification? Usually yes, since the electronics are identical. Mechanical tests differ, so budget for both sets of test reports.
Tell us what your customers lock — a hasp, a gate, a wheel or a locker — and we will recommend the right Tuya Bluetooth fingerprint form factor, with OEM branding and a sample in your hands fast.
Looking for this in bulk or with your brand?
OEM branding, 24h reply, free evaluation units for qualified buyers.