DC 12V Electric Bolt Door Lock Fail Safe NO/NC with Feedback

Asia-Teco Electric Bolt Door Lock — DC 12V Fail Safe with Timer Delay & Door Contact Feedback

Upgrade your access control setup with the Asia-Teco Electric Bolt Door Lock (Model: B3L-NO/B3L-NC). Built from heavy-duty aluminium alloy and engineered for continuous operation, this DC 12V electric bolt lock offers flexible fail-safe or fail-secure modes, a built-in timer delay, and door contact feedback signal — making it a reliable choice for residential, commercial, and light industrial door systems.

Key Features

• Dual Secure Modes (NO/NC): Choose between Normally Open (fail-safe — unlocks on power loss) or Normally Closed (fail-secure — locks on power loss) to match your security requirements.
• Door Contact Feedback Signal: Built-in feedback signal output lets your access control system monitor door status in real time for smarter, more responsive security.
• Timer Delay Function: Adjustable timer delay provides controlled entry and exit timing, reducing risk of unauthorized access during transitions.
• Wide Compatibility: Especially suitable for glass, wooden, metal, and security doors — a versatile fit for most standard door types.
• Durable Aluminium Alloy Construction: High-grade aluminium alloy body ensures long-lasting performance even in high-traffic environments.
• Magnetic Induction Lock Mechanism: Smooth, reliable magnetic induction locking minimizes mechanical wear for extended service life.
• Stable & Interference-Free: Shielded design reduces external electromagnetic interference for consistent, dependable operation.
• Sleek, Compact Design: Slim 120 × 18 × 23 mm profile integrates neatly into door frames without bulky hardware.

Technical Specifications

What's in the Box?

• 1× Electric Bolt Door Lock (B3L-NO or B3L-NC)
• Mounting hardware included

Installation Note

This lock requires drilling installation. Ensure your door frame is compatible with the lock's dimensions (120 × 18 × 23 mm) before purchase. For best results, consult a qualified electrician or locksmith for wiring the DC 12V power supply and access control integration.

For guidance on physical security best practices, visit the U.S. Consumer Product Safety Commission (CPSC) for product safety standards and resources.

Frequently Asked Questions

Q: What is the difference between the NO (Normally Open) and NC (Normally Closed) models?

A: The NO (Normally Open / Fail-Safe) model unlocks automatically when power is cut — ideal for fire safety applications where doors must open during an emergency. The NC (Normally Closed / Fail-Secure) model remains locked when power is lost — best for high-security areas where the door must stay locked during a power outage. Both are available with this Asia-Teco electric bolt door lock.

Q: Is the DC 12V electric bolt lock compatible with my existing access control system?

A: Yes. This lock operates on a standard DC 12V power supply and features a door contact feedback signal output, making it compatible with most commercial access control systems, keypads, card readers, and intercom setups. Always verify your controller's output voltage and current rating before installation.

Q: What types of doors can this electric bolt lock be installed on?

A: The Asia-Teco B3L electric bolt lock is suitable for glass, wooden, metal, and security doors. Its slim 120 × 18 × 23 mm aluminium alloy body fits most standard door frames with a simple drilling installation process.

Q: Does the lock include a timer delay feature, and how does it work?

A: Yes. The built-in timer delay function allows the lock to remain in the unlocked state for a set period after an access event before automatically re-locking. This is useful for controlled entry and exit in offices, server rooms, and secure facilities, giving occupants sufficient time to pass through without compromising security.