---
product_id: 74395780
title: "Electric Drop Bolt Lock DC 12V Fail Safe NC Mode Electronic Door Lock for Access Control Security System with Time Delay"
brand: "libo smart home"
price: "454 kr"
currency: DKK
in_stock: true
reviews_count: 8
category: "Libo Smart Home"
url: https://www.desertcart.dk/products/74395780-electric-drop-bolt-lock-dc-12v-fail-safe-nc-mode
store_origin: DK
region: Denmark
---

# Adjustable 0/3/6s time delay Fail-safe NC mode locks on power Surface-mounted aluminum alloy build Electric Drop Bolt Lock DC 12V Fail Safe NC Mode Electronic Door Lock for Access Control Security System with Time Delay

**Brand:** libo smart home
**Price:** 454 kr
**Availability:** ✅ In Stock

## Summary

> 🔐 Elevate your access control game with fail-safe precision and sleek durability!

## Quick Answers

- **What is this?** Electric Drop Bolt Lock DC 12V Fail Safe NC Mode Electronic Door Lock for Access Control Security System with Time Delay by libo smart home
- **How much does it cost?** 454 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/74395780-electric-drop-bolt-lock-dc-12v-fail-safe-nc-mode)

## Best For

- libo smart home enthusiasts

## Why This Product

- Trusted libo smart home brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust Aluminum Alloy:** Durable, wear-resistant surface treatment ensures long-lasting protection against tampering.
- • **Customizable Time Delay:** Set your preferred 0, 3, or 6-second delay to balance convenience and security seamlessly.
- • **Power-Controlled Security:** Locks instantly when powered, unlocking safely on power loss for fail-safe peace of mind.
- • **Anti-Theft Hex Screw Design:** Enhanced security with hexagon screws and fixed panel to deter unauthorized access.
- • **Universal Door Compatibility:** Perfectly fits wooden, glass, metal, and fireproof doors—upgrade any entry point effortlessly.

## Overview

The LIBO Smart Home Electric Drop Bolt Lock is a surface-mounted, fail-safe NC mode electronic lock operating at DC 12V. Crafted from durable aluminum alloy with a wear-resistant finish, it features an adjustable time delay (0, 3, or 6 seconds) and is compatible with wooden, glass, metal, and fireproof doors. Designed for professional-grade security, it includes anti-theft hex screws and a simple wiring setup, making it a reliable and versatile solution for modern access control systems.

## Description

Features:1. NC mode - (locked while supplied with power), fail safe mode.2. Installation: unfold install (surface mounted).3. Material: Aluminum alloy material.4. With time delay: 0s, 3s, 6s.5. Suitable For: Wooden door, Glass door, Metal door, Fireproof door, etc.6. Surface scrub treatment, durable and wear-resistant. 7. Lock body use hexagon screw, fixed panel, anti-theft and more security.Specifications:Model Name: L-XXS Dimensions: 150x34x28mmLock core: The diameter 12.5MM, extending the length of 15MM Working Voltage: DC12VWorking current: Start state 1.2A Persistent state 120mAOperating Mode: NC (locked while supplied with power), fail safe modeWires: red to "NC", black to "GND".Warm Note: yellow line and white line are useless, don't need to be connected. Package Including:1 x Electric Drop Bolt Lock1 x Bag of installation kit

Review: Inexpensive, reliable locking mechanism that is solidly built and well-designed - This has been working great for me. It is a very solidly built mechanism and when the bolt is extended, the lock is absolutely secure. I was so pleased with how well it works and how economically priced it is I bought a second for a spare.
Review: Very safe a si nd secure recomend working 100% - Door security and garage and for many other things to be secure

## Features

- 1, NC Mode: Fail-safe type, unlocked when power off, locked when power on.
- 2, Installation: unfold install (surface mounted).
- 3, With time delay: 0s, 3s, 6s
- 4, Wires: red to "NC", black to "GND". yellow line and white line are useless, don't need to be connected.
- 5, Suitable For: Wooden door, Glass door, Metal door, Fireproof door, etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | LIBO Smart Home |
| Item dimensions L x W x H | 5.91 x 1.34 x 1.1 inches |
| Lock Type | Electronic Lock |
| Material | Aluminium Metal |
| Recommended Uses For Product | Security |
| Special Feature | Electric |

## Product Details

- **Brand:** LIBO Smart Home
- **Item dimensions L x W x H:** 5.91 x 1.34 x 1.1 inches
- **Lock Type:** Electronic Lock
- **Material:** Aluminium Metal
- **Special Feature:** Electric

## Images

![Electric Drop Bolt Lock DC 12V Fail Safe NC Mode Electronic Door Lock for Access Control Security System with Time Delay - Image 1](https://m.media-amazon.com/images/I/51VpyGNXQJL.jpg)

## Questions & Answers

**Q: Are these rated for outdoor?**
A: Sorry, the product you asked is not waterproof. Can not be used outdoors.

**Q: How much current does it draw while holding the solenoid closed/locked?**
A: Working Voltage: DC12V, Working current: Start state 1.2A Persistent state 120mA

**Q: Is it come with a power supply? Or I have to buy it separately?**
A: Sorry, the product you asked is a electric lock only. There is no power supply included. If you need the power supply, you have to buy it in additional.

**Q: Does this work with a reverse polarity switch?**
A: This electric lock will be working with those switch which with "NC", "NO" and "COM" wiring ports and working voltage is DC 12V.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Inexpensive, reliable locking mechanism that is solidly built and well-designed
*by J***P on June 27, 2021*

This has been working great for me. It is a very solidly built mechanism and when the bolt is extended, the lock is absolutely secure. I was so pleased with how well it works and how economically priced it is I bought a second for a spare.

### ⭐⭐⭐⭐⭐ Very safe a si nd secure recomend working 100%
*by L***S on April 2, 2022*

Door security and garage and for many other things to be secure

### ⭐⭐⭐⭐ Great price, but you get what you pay for
*by S***R on June 8, 2021*

I actually bought these in a kit that came with the keypad & power supply. I had strange issues with the drop bolt just randomly unlocking with the power supply it came with. I tried debugging it for the longest time and never could figure out 100% what the problem was. I do know that there is a 0.5v AC wave going out on the 12v DC from the power supply which I think was causing the problem. Since switching to my own power supply the device works perfectly. I ended up tossing the power supply it came with into the garbage. The yellow and white wires aren't useless. They actually give you the status of the door (whether it is closed or not) by returning the state of the reed switch. The wires do not output voltage and instead work like a relay where the wires allow current to pass when the door is closed. You could use this with a microcontroller to determine if the door is closed. Do note though that this does not return whether the door is locked. This will only tell you that the door is closed. There is also another strange issue. If you power the lock on your desk and connect the two pieces it will engage. If you then pull the two pieces apart the lock stays engaged. It's strange though because it will only stay engaged if it has been a few seconds. It is almost like the solenoid's magnetic field is messing with the reed switch to make the lock think it is still touching the "receiver". This has actually almost caused a problem because if the door isn't fully shut but is shut enough to get the pin to engage it will drop the pin with the door still open and wont retract it. I've almost had the door bust the pin off because of the weight of the door. So yeah you get what you pay for. I almost wish I bought a more expensive unit that actually returned whether it was locked or not. I mainly came here to post that the yellow and white wires aren't useless. I opened the device to figure it out.

## Frequently Bought Together

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-21*