Mini Self-Locking Solenoid Electromagnet DC 3V 3.7V 5V 6mm

Mini Self-Locking Solenoid Electromagnet – DC 3V / 3.7V / 5V

This compact mini self-locking solenoid electromagnet is the perfect solution for DIY electronics, automation projects, smart locks, and maker builds. Manually press it down to engage the internal strong magnet — then simply apply power (DC 3V–5V) and it instantly releases, making it ideal for energize-to-release protection switch applications.

Key Features

• Wide Voltage Compatibility: Operates at DC 3V, 3.7V, or 5V — works seamlessly with Arduino, Raspberry Pi, and other microcontroller platforms
• Self-Locking Mechanism: Strong internal magnet holds position mechanically; energizing releases the lock instantly
• 6mm Stroke: Precise and consistent stroke distance suitable for compact switching and locking applications
• Lightweight & Compact: Weighs only 23g — ideal for space-constrained builds and portable devices
• Simple Wiring: Green wire = positive (+); Red wire = negative (−)
• Durable Metal Construction: Built from metal for reliable, long-lasting performance

Specifications

• Operating Voltage: DC 3V / 3.7V / 5V
• Stroke: 6mm
• Weight: 23g
• Material: Metal
• Package Includes: 1 × Mini Self-Locking Solenoid Electromagnet
• Country of Origin: Made in Mainland China

Common Applications

• DIY smart lock and access control systems
• Arduino / Raspberry Pi / ESP32 automation projects
• Energize-to-release protection switches
• Robotics and electromechanical assemblies
• Vending machines, dispensers, and door latches

Important Notes

• Photos may not reflect actual size — refer to specifications above for exact dimensions.
• Slight differences due to manual measurement may occur.
• Color may vary slightly due to monitor settings.

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For further reading on electrical safety standards and low-voltage electronics, visit the U.S. Consumer Product Safety Commission (CPSC) for guidelines on safe use of electrical components.

Learn more: Solenoid

Frequently Asked Questions

Q: What voltage does this mini solenoid electromagnet support?

A: This self-locking solenoid electromagnet is compatible with DC 3V, 3.7V, and 5V power supplies, making it suitable for a wide range of microcontrollers and battery-powered projects including Arduino, ESP32, and Raspberry Pi setups.

Q: How does the self-locking solenoid mechanism work?

A: Simply press the plunger down manually — the internal strong magnet holds it in the locked position. When you apply DC power (green wire to positive, red wire to negative), the electromagnet activates and instantly releases the plunger, functioning as an energize-to-release switch.

Q: What is the stroke length of this solenoid?

A: The stroke length is 6mm, providing a precise and consistent release distance ideal for compact switching, latching, and automation applications.

Q: Is this electromagnet suitable for Arduino or Raspberry Pi projects?

A: Yes! With its 3V–5V operating range and lightweight 23g form factor, this mini solenoid electromagnet is perfectly suited for use with Arduino, Raspberry Pi, ESP32, and other low-voltage maker boards and DIY electronics projects.