The Ø42×25 mm 24V DC Permanent Magnet Electromagnet is designed to hold firmly when power is off and release instantly when power is applied.
Unlike standard electromagnets, this failsafe-type design ensures secure holding without continuous power, making it an ideal choice for safety-critical and energy-efficient applications.
Equipped with an M5 threaded rear mounting hole and a side cable exit, it allows for easy installation even in compact mechanical setups.
The 50% duty cycle makes it suitable for repetitive holding and releasing operations, while the 304 stainless steel housing provides excellent corrosion resistance and long-term durability.
Applications
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Electromechanical lock and safety systems
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Power-off holding and position retention applications
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Robotic gripping and release mechanisms
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Automation and conveyor systems
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CNC machine part fixing
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Industrial magnetic clamping systems
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Holds securely when power is OFF – releases when power is ON
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Energy-saving and safe operation
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Durable stainless steel construction
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Compact design for easy integration
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High holding force and reliable performance
Working Principle of Electromagnets
An electromagnet is an industrial component that generates a holding force by creating a magnetic field around an iron core through the electric current passing through its coil. The table below summarizes the general principles.
Electromagnet working logic, components, duty cycle and applications
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Topic
|
Description
|
| Basic Principle |
When a DC voltage (e.g. 12V or 24V) is applied, the current flowing through the coil creates a magnetic field around the core and attracts metal surfaces. |
| Main Components |
Coil (winding), iron core, housing, connection cables, and where needed a resin coating (heat dissipation/insulation). |
| Strength of the Magnetic Field |
Current (A), voltage (V), number of windings, core material, and the cleanliness/tolerance of the contact surface determine the holding force. |
| Duty Cycle |
50% duty: Operates for a set period and then rests (for heat management). 100% duty: Suitable for continuous operation; typically a heat-resistant/resin-coated design. |
| Polarity (Poles) |
When the current direction changes, the N–S poles reverse. This is an advantage in direction-controlled applications. |
| Behavior on Power Loss |
Standard electromagnet: Holding force is lost when power is cut. Permanent-magnet type: Holding continues when power is cut and releases when power is applied (fail-safe). |
| Heating and Cooling |
Heating occurs due to coil resistance. The correct duty cycle, adequate cooling, and a suitable mounting surface are critical for lifespan/performance. |
| Applications |
Industrial lifting/holding, automation and robotic grippers, door locks, brake/release mechanisms, CNC and assembly lines. |
| Advantages |
Controllable magnetic force, fast response, remote actuation, depending on the application either fail-safe release or fail-safe hold. |
Round Electromagnets Catalog
You can find the technical drawing and standard catalog dimensions of the product in the table below. Please contact us for custom size production.
MODEL (BYR5CK/ BUR5CK)
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Dimensions (mm)
|
Power WATT
|
Voltage VDC
|
Duty Cycle %
|
Connection POSITION
|
Cable Gland PG7-9
|
Min. Plate Thick. (mm)
|
Pull Force (N)
|
|
ØD
|
H
|
M
|
| Ø40x30 mm |
40 |
30 |
M6 |
5.2 |
24 |
50 |
TOP/SIDE |
PG7 |
5 |
470 |
| Ø50x30 mm |
50 |
30 |
M6 |
7 |
24 |
50 |
TOP/SIDE |
PG7 |
5 |
760 |
| Ø63x35 mm |
63 |
35 |
M6 |
10 |
24 |
50 |
TOP/SIDE |
PG7 |
8 |
1000 |
| Ø80x40 mm |
80 |
40 |
M8 |
15 |
24 |
50 |
TOP/SIDE |
PG7 |
10 |
2400 |
| Ø100x45 mm |
100 |
45 |
M8 |
25 |
24 |
50 |
TOP/SIDE |
PG7 |
15 |
3400 |
| Ø150x55 mm |
150 |
55 |
M16 |
37.2 |
48 |
50 |
TOP/SIDE |
PG7 |
25 |
9300 |
| Ø180x65 mm |
180 |
60 |
M20 |
50 |
48 |
50 |
TOP/SIDE |
PG7 |
30 |
15000 |
| Ø200x60 mm |
200 |
60 |
3xM12 |
65 |
48 |
50 |
TOP/SIDE |
PG9 |
35 |
25000 |
| Ø250x80 mm |
250 |
80 |
3xM12 |
90 |
48 |
50 |
TOP/SIDE |
PG9 |
40 |
30000 |
| Ø280x110 mm |
280 |
110 |
3xM12 |
150 |
48 |
50 |
TOP/SIDE |
PG9 |
50 |
40000 |
| Ø300x130 mm |
300 |
130 |
3xM12 |
180 |
48 |
50 |
TOP/SIDE |
PG9 |
80 |
45000 |