Electrically switched electro-permanent lifting magnet WL8245

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Product summary
A WL8245 permanent holding electromagnet provides mechanical retention using permanent magnets combined with a switchable coil. The unit holds loads without continuous power and requires energy only during switching (energise-to-release). It is designed for industrial automation, fixturing and material handling where energy efficiency and failsafe retention are required.

Main features

• High rated holding force (~1900 N)
• Zero or negligible power during hold; power used only for switching (43 W nominal during pulse)
• Available voltages: DC 12V and DC 24V
• Compact size (Ø82 × H45 mm) and threaded mounting (M5 × H19)
• Durable construction with electroplated surface (zinc)
• Service life >500,000 cycles; insulation class B; Hi-Pot AC750V/2S

Product overview
The WL8245 integrates permanent magnets and an electromagnetic coil to provide dependable retention that remains active during power loss. Typical installations include CNC clamping, robotic grippers, lifting/holding in material handling, welding and assembly fixtures, security locks and failsafe braking or locking devices.

Industrial product video
Reference demonstration video is available to show operation, switching sequence and typical integration examples.

Principle of operation
The permanent magnets generate baseline magnetic flux for holding. A short excitation pulse to the coil changes the magnetic circuit (polarity/flux) to neutralize the external holding force and allow release. Energy is consumed only during switching events, providing energy savings and inherent failsafe retention when unpowered.

Applications

• Clamping and fixturing in CNC machining centers
• Robotics: positioning and holding ferromagnetic parts
• Material handling: lifting and retaining metal sheets or assemblies
• Automotive assembly: part positioning during welding and joining
• Security and failsafe systems: locks, brakes and retention devices
• Automated guided vehicles (AGVs) and continuous systems requiring energy-efficient holding

Advantages

• Energy efficiency: no continuous holding power required
• Failsafe retention during power loss
• Compact footprint with high force-to-size ratio for easy integration
• Low maintenance and long operational life in industrial environments

Disadvantages

• Higher cost and more complex internal design than simple electromagnets
• Control circuitry for switching pulses is required
• Switching speed may be slower than some solenoids depending on design
• Performance limited to ferromagnetic target materials and influenced by temperature

Troubleshooting
Typical issues and checks:

• Low holding force: clean contact surfaces; remove oil, dust or rust; ensure flat mating surfaces and minimal air gap
• Failure to release: verify pulse voltage, pulse duration, coil resistance and control signals
• Overheating: reduce switching frequency or improve cooling; respect rated duty cycle
• Mechanical misalignment: ensure full surface contact and correct mounting
• Residual force after release: expect small residual force; use nonmagnetic shims or demagnetization pulses if needed

How to choose
Key selection criteria:

• Required holding force with safety margin
• Maximum air gap or stroke
• Control voltage and pulse duration
• Coil specifications and switching reliability
• Environmental conditions (temperature, humidity, contamination)
• Duty cycle (switching frequency) and thermal management
• Mechanical dimensions, mounting method and redundancy requirements for safety-critical systems

Packing recommendations
For transport and storage:

• Use individual magnetic shielding to avoid interaction between units
• Protect contact surfaces with shock-absorbing foam or rubber to prevent scratches
• Provide moisture protection to avoid corrosion
• Label polarity, rated voltage and handling instructions clearly

Product datasheet (summary table)
Product name: Permanent holding electromagnet | Model: WL8245 | Voltages: DC 12V / DC 24V | Power (switching): 43 W | Holding force: ~1900 N | Size: Ø82 × H45 mm | Duty cycle: 10% | Insulation class: B | Hi-Pot: AC750V/2S | Service life: >500,000 cycles | Net weight: 168 g | Mounting thread: M5 × H19 | Lead wire: bottom edge out 25 cm (customizable) | Surface: electroplated (zinc) | Action form: energise-to-release | Certificates: CE, RoHS | MOQ: 200 pcs | Warranty: 2 years | Origin: Dongguan, Guangdong

Characteristics / Technical specifications

• Model (commercial): WL8245
• Product type: Permanent holding electromagnet (energise-to-release)
• Available voltages: DC 12V, DC 24V
• Power consumption (switching): 43 W (typical)
• Rated holding force: ~1900 N
• Size example: Ø82 × H45 mm
• Duty cycle: 10%
• Insulation class: B
• Hi-Pot: AC750V/2S
• Service life: >500,000 cycles
• Net weight: 168 g
• Surface finish: Electroplating (zinc coating)
• Mounting thread: M5 × H19
• Lead wire: bottom edge out 25 cm (customizable)
• Action form: Energise to release (failsafe hold)
• Certificates: CE, RoHS