DC 12V Fail-Safe Solenoid Electromagnet 7kg Holding Force

DC 12V Compact Electromagnet Solenoid – 7kg (70N) Holding Force

Meet the SARY LY-2529 Fail-Safe Electromagnet — a compact, energy-efficient DC 12V solenoid designed for automation systems, robotic arms, sorting machines, assembly lines, and experimental setups. Its unique non-energized magnetic (fail-safe) operation means: power OFF = magnetic force ON, power ON = magnetic force OFF. This makes it ideal for safety-critical applications where you need to hold an object in place when power is removed.

Made in Mainland China.

Key Features

• Fail-Safe Operation: Magnetic force is active when power is OFF — perfect for secure holding without continuous power draw
• 7kg / 70N Holding Force: Impressive gripping strength in a compact 25mm × 29mm stick-style form factor
• Low Power Consumption: Operates at only 7.2W (DC 12V / 0.6A), keeping energy costs minimal
• Durable Metal Construction: Smooth, flat silver-finish surface ensures consistent contact and maximum holding performance
• Wide Application Range: Automation assembly lines, robotic mechanical arms, sorting equipment, experimental labs, and more
• High Temperature Tolerance: Rated for ambient temperatures up to 130°C
• M5 Thread Size: Easy to mount and integrate into existing systems

Product Specifications

Wiring Instructions

Important: This electromagnet uses a reversed polarity wiring convention:
🔴 Red wire → Negative (–) pole of power supply
⚫ Black wire → Positive (+) pole of power supply

Conditions for Maximum Holding Force

To achieve the rated 7kg holding force, ensure all of the following conditions are met:

1. The target object must have good magnetic permeability (ferromagnetic material such as iron or steel).
2. Use the correct rated voltage (DC 12V).
3. The target object's surface must be flat and clean.
4. The contact area of the target object must be equal to or larger than the magnet surface.
5. The target object must be at least 8mm thick — holding force decreases as thickness decreases.
6. There must be direct contact between the magnet and target — no gaps, coatings, or intermediate objects.

Note: If any of the above conditions are not fully met, the effective holding force will be lower than the rated maximum.

Typical Applications

• Automated assembly lines
• Industrial sorting machines
• Robotic mechanical arms
• DIY electronics and engineering experiments
• Access control and locking mechanisms
• Laboratory automation setups

For general electrical safety guidelines relevant to low-voltage DC devices, refer to the OSHA Electrical Safety Resources.

Frequently Asked Questions

Q: How does the fail-safe (non-energized magnetic) mode work on this DC 12V electromagnet?

A: Unlike standard electromagnets that are only magnetic when powered, this LY-2529 operates in reverse: it holds magnetic force when the power is OFF and releases the magnetic field when power is turned ON. This fail-safe design is ideal for applications where you need an object to remain held in place during a power interruption.

Q: What type of materials can this 7kg solenoid electromagnet hold?

A: This electromagnet works with ferromagnetic materials such as iron and steel. Non-magnetic materials like aluminum, copper, plastic, or wood will not be attracted. For best results, the target surface should be clean, flat, and at least 8mm thick.

Q: Can this electromagnet be used continuously without overheating?

A: The electromagnet is rated for ambient temperatures up to 130°C. Some heat generation during operation is normal, especially during extended use. Ensure adequate ventilation in your setup and monitor temperatures in enclosed environments to maintain safe operation.

Q: Why are the red and black wires reversed from standard convention?

A: This unit uses a non-standard wiring configuration. The red wire connects to the negative (–) terminal and the black wire connects to the positive (+) terminal of your DC 12V power supply. Always follow the provided wiring instructions to ensure correct operation.