Holding solenoid WL2520

compactpower-on24-volt

Product summary
The WL2520 holding electromagnet from Weilong Technology is an electrically operated magnet designed to attract and retain ferromagnetic parts. The device generates a magnetic field when energized and releases the part instantly when power is removed. It is suited for industrial holding, fixturing and material handling where on-demand magnetism and compact size are required.

Main features

• On-demand magnetism: magnetic effect only while energized for immediate release.
• High holding force per size: compact Ø25×20 mm design with significant grip capacity (140 N).
• Flat pole face for optimal contact with workpieces.
• Low power consumption for continuous operation (DC variants).
• Fail-safe release on power interruption (suitable for many safety setups).
• Available voltages: DC 12V or 24V.
• Encapsulated and weather-resistant options available for harsh environments.
• Fast activation/deactivation: typical response <1 s.

Product overview & working principle
Holding electromagnets convert electrical energy into a controlled magnetic force that attracts ferrous materials while energized. Unlike permanent magnets, the magnetic field is present only when current flows through the coil. Designs maximize holding capability relative to size and provide a flat pole face for reliable contact. Residual magnetism can occur and should be considered in precision applications.

How it works
Input of electric current
When switched on, DC current passes through a copper coil.
Magnetic field generation
The energized coil produces a magnetic field.
Field intensification
An iron core concentrates and intensifies the field to increase attraction.
Object retention
The pole face contacts and holds ferrous parts securely.
Power-off release
When current stops, the magnetic field disappears and the part is released.

Key technical parameters affecting performance
Current and voltage values
Coil resistance and number of turns
Iron core material and geometry
Condition and flatness of contact surface (air gap sensitivity)

Typical applications

• Industrial automation: magnetic fixturing for machining, grinding, welding.
• Material handling and sorting lines: retain steel plates, bars or scrap.
• Maglocks and door locking systems with emergency-release requirements.
• Robotic end-effectors for gripping metallic parts in assembly.
• Automotive assembly and welding fixtures.
• Precision fixtures and test tooling in calibration environments.

Technical datasheet (selected rows)

• Brand: Weilong Technology
• Model: WL2520
• Dimensions: Ø25×20 mm
• Holding force: 140 N (≈14 kgf)
• Rated voltage: DC 12 V or 24 V
• Rated power: 3.6 W
• Resistance: 32 Ω
• Lead wire length: 200 mm
• Mounting: M4×6 screw holes
• Weight: 58 g
• Working temperature: -10°C to 100°C
• Working duty: 100% / service life ≈100,000 cycles
• Certifications: CE, ROHS, ISO9001

Series selection (examples)

• WL-0820 | Ø8×20 | 3 N | 1.6 W | weight 6.5 g
• WL-1520 | Ø15×20 | 20 N | 1.4 W | weight 12 g
• WL-2520 | Ø25×20 | 140 N | 3.6 W | weight 58 g
• WL-3025 | Ø30×25 | 250 N | 4.3 W | weight 110 g
• WL-5030 | Ø50×30 | 700 N | 6 W | weight 331 g

Advantages / disadvantages

• Advantages: remote on/off control, instant engagement/release, high hold-to-size ratio, low mechanical wear, adjustable through coil design.
• Disadvantages: requires continuous power to hold (safety consideration for lifting), heating under prolonged/high loads, possible residual magnetism, works only on ferrous materials.

Technical specifications

• Brand: Weilong Technology
• Model: WL2520
• Rated voltage: DC 12 V or 24 V
• Rated power: 3.6 W
• Holding force: 140 N (≈14 kgf)
• Duty cycle: 1–100% (working duty listed as 100%)
• Resistance: 32 Ω
• Lead wire length: 200 mm
• Insulation class: B
• Working temperature: -10°C to 100°C
• Service life: ≈100,000 cycles
• Material: carbon steel housing
• Mounting: screw holes (M4×6)
• Certifications: CE, ROHS, ISO9001