12V Electric Strike Door Lock – Fail Safe & Fail Secure Adjustable

ANSI Double Lock Mouth Port 12V Electric Strike – Fail Safe & Fail Secure Adjustable

Upgrade your access control system with this professional-grade 12V Electric Strike Door Lock (Model JK250K / JK250KSL). Designed to ANSI standards, this long-plate electric strike features a dual-mode design — simply adjust a single screw to switch between Fail Safe (power-to-lock) and Fail Secure (power-to-open) operation, making it one of the most versatile electronic strikes on the market.

Built from thick stainless steel with built-in full copper coils, this electric strike delivers long-lasting, reliable performance with minimal residual magnetism — ensuring smooth, consistent locking cycles every time. Its embedded installation design provides a clean, professional look suitable for glass doors, stainless steel doors, and a wide range of frame door types.

Made in China.

Key Features

• Adjustable Lock Mode: Easily switch between Fail Safe and Fail Secure by turning a single adjustment screw — no rewiring needed.
• ANSI Double Lock Mouth Port: Long-plate design ensures compatibility with a broad range of door frames and hardware setups.
• High-Quality Construction: Thick stainless steel body with full copper electromagnetic coils for durability and stable operation.
• Low Residual Magnetism: Special electromagnetic materials and manufacturing process prevent residual magnetism buildup, ensuring reliable unlocking every cycle.
• Embedded Installation: Sleek, flush-mount design for a clean, professional appearance.
• Signal Feedback Option: Available in 2-cable (12V + GND only) or 4-cable (with signal feedback) configurations for advanced integration.
• CE Certified: Meets European safety and quality standards.
• Wide Compatibility: Suitable for glass doors, stainless steel doors, framed doors, and more.

Specifications

What's a Fail Safe vs. Fail Secure Electric Strike?

Understanding the difference helps you choose the right setting for your application. A Fail Safe lock releases (unlocks) when power is lost — ideal for emergency egress doors. A Fail Secure lock remains locked when power is lost — ideal for securing high-security areas. This electric strike supports both modes in one unit. For more guidance on access control best practices, refer to the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What is the difference between the 2-cable and 4-cable versions of this electric strike?

A: The 2-cable version includes only the 12V power and GND (ground) wires for basic operation. The 4-cable version adds signal feedback wires, allowing your access control system to monitor the lock's status in real time — ideal for more advanced or integrated security setups.

Q: Can I switch between Fail Safe and Fail Secure modes after installation?

A: Yes. This electric strike features an easy-adjust screw that lets you toggle between Fail Safe (power-to-lock) and Fail Secure (power-to-open) modes without rewiring. It's a straightforward adjustment that can be made even after the lock is installed.

Q: What types of doors is this 12V electric strike compatible with?

A: This electric strike is designed for a wide range of door types including glass doors, stainless steel doors, aluminum frame doors, and most standard framed doors. Its ANSI long-plate design ensures broad compatibility with common door hardware configurations.

Q: What power supply does this electric strike require?

A: The lock operates on 12V DC at ±10% tolerance, drawing 250 mA of working current. A standard 12V access control power supply is required — it is not included with the lock.