Łucznik Symmetrical Electric Strike NC Adjustable with Switch and Internal Memory

The Łucznik symmetrical electric strike is a professional-grade locking solution designed for modern access control systems. This NC (normally closed) device remains locked when powered and releases only when an electrical signal is received. It is engineered for durability and precision, making it a reliable component for securing residential and commercial entry points. The unit features a symmetrical design, allowing for versatile installation in both left and right-handed doors.

Advantages

The primary benefit of this electric strike is its integrated internal memory function, which allows the door to remain unlocked after receiving a single electrical pulse until the door is physically opened and closed. This eliminates the need for continuous power supply during entry. The inclusion of a mechanical switch provides a manual override option, enabling the door to be kept in a permanently unlocked state when required. Furthermore, the adjustable latch mechanism ensures a perfect fit with the door frame, compensating for minor misalignments and ensuring smooth operation over time.

Suitable for

• Residential apartment building entrance doors
• Office access control systems
• Integration with intercom and video doorbell systems
• Gates and wicket doors requiring remote access

When it may not be suitable

This device is not suitable for fire-rated doors or emergency exit routes where fail-safe (normally open) operation is required by safety regulations. It should not be used in environments where the electrical supply is unstable or where the door requires constant power to remain locked.

Key specifications

• Operation mode: Normally Closed (NC)
• Internal memory function: Yes
• Mechanical switch: Yes
• Symmetrical design: Yes
• Adjustable latch: Yes

How to use

Installation should be performed by a qualified technician to ensure proper alignment with the door lock. The strike is mounted into the door frame, replacing the standard strike plate. Once installed, the electrical wiring is connected to the access control system or intercom. The mechanical switch can be toggled manually to disable the locking mechanism entirely, allowing free passage without the need for an electronic signal.

What to consider before purchase

• Verify that your existing lock system is compatible with NC (normally closed) strikes.
• Ensure the door frame has sufficient space for the strike dimensions.
• Check the voltage requirements of your access control system.
• Confirm if your local building codes permit the use of NC strikes for your specific door type.

Usage recommendations

Regularly inspect the mechanical switch and latch movement to ensure they remain free of debris. Lubricate moving parts periodically to maintain smooth operation and prevent mechanical wear.