Holding magnet WL4025

cylindricalfor automotive applicationselectronic equipment

Overview
A round holding magnet is a DC-powered electromagnet designed for controlled gripping of ferromagnetic metal objects. The round shape ensures an evenly distributed magnetic field and consistent interaction with flat metal surfaces. This product is intended for industrial use and is available with options for continuous duty, custom voltage, cable diameter and length, and coating.

Key features
The magnet generates magnetic force only when current flows through the internal copper coil; it is not a permanent magnet. It provides high holding power in a compact round body, sealed construction for industrial durability, options for continuous duty, and zinc (or nickel/epoxy) coating for corrosion resistance. Power and thermal performance can be optimized by selecting appropriate voltage and duty cycle.

Advantages

• Controllable holding force via DC power; can be engaged and disengaged instantly.
• High holding force relative to its compact size; continuous-duty (100% ED) variants available.
• Sealed construction and corrosion-resistant coating suitable for industrial environments.
• Low maintenance and long service life when used according to specifications.

Disadvantages

• Requires a continuous power supply to maintain holding force; no hold when power is off.
• Potential heat generation during prolonged use; adequate thermal management is required for continuous-duty operation.
• Holding force depends strongly on contact surface condition (flatness, paint, rust) and material (must be ferromagnetic).
• Possible residual magnetism depending on steel type and magnetic circuit.

Applications

• Industrial automation: holding metal parts during machining, welding or assembly.
• Safety locking and electromagnetic locks for access control and industrial doors.
• Robotics: holding steel parts during assembly and handling processes.
• Transportation equipment, vending machines, medical and laboratory devices requiring steady, low-noise holding.

Datasheet (excerpt)
Brand: Weilong Technology
Model Number: WL 4025
Rated Voltage (V): DC 24V
Rated Power (W): 4.5 W
Work Model: Holding Suction
Attraction Force: 3500 GF
Stroke (mm): Customized
Reset Time (s): 1 S
Service Life: 500,000 cycles (approx.)
Certification: CE, ROHS, ISO9001
Material: Carbon steel housing with zinc coating (nickel/epoxy options)
Lead Wire Length (mm): 200 (customizable)
Install Style: screw (thread depth M5 * 6)
Tolerance of Dimension: +/- 0.1 MM
Water-proof: yes (sealed)
Insulation Class: F (155°C)
Hi-Pot Test: AC 600V 50/60Hz 2s
Resistance: 132 ohm
Working Temperature: -10°C to 100°C
Duty Cycle: 1–100% (continuous-duty available)
Payment Term: TT, or LC At Sight
Sample Order: Yes
Warranty: 1 Year
MOQ: 1000 PCS
Supply Ability: 5000 pcs per week
Delivery Time: 30 Days
Port of Loading: Shenzhen

Notes on performance and selection
Published holding force is measured under ideal conditions (smooth, flat low-carbon steel, full contact, no air gap). Real-world conditions (paint, rust, thin plates, surface roughness) reduce force; apply a safety margin of 30–50%. Standard DC voltages include 12V, 24V and 48V; 24V DC is common in industrial automation. Continuous-duty (100% ED) variants require appropriate heat dissipation and thermal management.

Technical specifications

• Brand: Weilong Technology
• Model: WL 4025
• Rated Voltage: DC 24V
• Rated Power: 4.5 W
• Attraction Force: 3500 GF
• Work Model: Holding suction (electromagnetic holding)
• Service Life: ~500,000 cycles
• Material / Housing: Carbon steel with zinc coating (nickel/epoxy options)
• Lead Wire Length: 200 mm (customizable)
• Install Style: screw mount (thread depth M5 * 6)
• Ingress / Water-proof: yes (sealed)
• Insulation Class: F (155°C)
• Resistance: 132 ohm
• Operating Temperature Range: -10°C to 100°C
• Duty Cycle: 1–100% (continuous duty available)
• Reset Time: 1 s
• MOQ / Supply: MOQ 1000 pcs; supply ability ~5000 pcs/week
• Typical Delivery Time: 30 days