The 5V Electromagnet - 2.5Kg Holding Force - P20/15 is a compact yet powerful solenoid-based electromagnet designed for electronics, robotics, and automation projects. Operating on a safe 5V DC supply, this electromagnet instantly generates magnetic force when powered and reverts to a non-magnetic state once the power is removed, making it highly efficient for controlled applications. Built with a durable iron core and copper coil, it ensures stable performance and reliability. With its compact size and efficient design, it is suitable for use in DIY projects, small-scale automation, magnetic locks, and educational experiments, providing both functionality and versatility. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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Features:
Strong Holding Power – Provides up to 2.5Kg holding force for reliable magnetic grip.
Low Voltage Operation – Works efficiently with 4–6V DC (nominal 5V) input.
Instant Magnetization – Quickly switches between magnetic and non-magnetic states.
Compact & Lightweight – Easy to embed in compact devices and robotics projects.
Durable Build – Iron core with a high-quality coil for long-lasting performance.
Safe Design – Built-in structure to minimize residual magnetism after de-energization.
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Applications:
Robotics Projects – For gripping, lifting, or sorting ferromagnetic objects.
DIY Electronics – Perfect for hobbyists experimenting with electromagnetism.
Automation Systems – Used in small solenoid locks, sorting machines, and relays.
Educational Demonstrations – Great for teaching electromagnetic principles in classrooms.
Prototyping & Testing – Ideal for engineers and makers needing a compact electromagnet.
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| General Specifications |
| Model | P20/15 |
| Nominal Voltage | 5V DC |
| Operating Voltage Range | 4V – 6V DC |
| Holding Force | 2.5 Kg / 5.5 lb |
| Approx. Pickup Weight | ~0.5 Kg (1 lb, depending on surface & contact) |
| Core Material | Iron |
| Coil Type | Copper Wire |
| Function | Magnetizes when powered, releases when off |
| Dimensions | 20mm Diameter × 15mm Height |
| Shipment Weight | 0.0235 Kg |
| Shipment Dimensions | 3 × 3 × 3 cm |
Please allow 5% measuring deviation due to manual measurement.
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Documentation:
Working Principle:
An electromagnet is simply a coil of wire. It is usually wound around an iron core. However, it could be wound around an air core, in which case it is called a solenoid. When connected to a DC voltage or current source, the electromagnet becomes energized, creating a magnetic field just like a permanent magnet. The magnetic flux density is proportional to the magnitude of the current flowing in the wire of the electromagnet.
The polarity of the electromagnet is determined by the direction of the current. The north pole of the electromagnet is determined by using your right hand. Wrap your fingers around the coil in the same direction as the current is flowing (conventional current flows from + to -). The direction your thumb is pointing in the direction of the magnetic field so north would come out of the electromagnet in the direction of your thumb. DC electromagnets are principally used to pick up or hold objects
We supply many varieties of electromagnets with a higher power as well as lower, original dimensions, etc to satisfy your unique requirements.
Note: Images may be seen different from actual product in terms of Dimensions
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Precaution:
Electromagnets must meet the following conditions to achieve maximum suction:
- The object to be sucked must have good magnetic permeability.
- Proper use of power supply, rated voltage.
- The object to be sucked must be flat and clean.
- The object to be sucked must be greater than or equal to the surface of the magnet( For example the magnet is 20 x 15 mm, so the surface area is S=r²π=10²π mm² so the object to be sucked must be greater than or equal to 10²π mm² )
- The object to be sucked must be greater than 5mm. (If the thickness decreases, the suction decreases)
- The object to be sucked must be close, the middle can’t be interspersed with objects or gaps
- Suction means more than 5cm in thickness, surface roughness, the surface is greater than the cross-sectional area of the electromagnet and maximum suction completely fit together on an iron-based material.
- Electromagnet in working condition electromagnetic conversion would produce a certain amount of heat, electricity more frequently the higher temperature, which is a normal phenomenon.
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Package Includes:
1 x 5V Electromagnet - 2.5 Kg Holding Force - P20/15
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