Holding solenoid WL0724

linearself-holdingbistable

Overview
The DC latching solenoid is an electromagnetic bistable actuator that changes and retains the plunger position with short electrical pulses and mechanical or magnetic latching, eliminating the need for continuous power. It reduces heat and power consumption while providing a compact footprint, fast response and long service life. Designed for reliable switching operations in control systems, industrial automation and smart devices.

How it works
A voltage pulse moves the plunger to a new position; the position is maintained when power is removed by a mechanical lock or permanent magnet. A reverse-polarity or opposite-direction pulse returns the plunger to its initial position.

Key features and benefits

• Energy efficient: only short pulses required to change state; no continuous holding current.
• Reduced heat generation due to intermittent coil energizing.
• Compact design suitable for battery-powered or portable equipment.
• Fast response time appropriate for automation switching.
• Long service life with correct duty cycle and maintenance.

Advantages

• Retains position without continuous power, improving energy efficiency.
• Minimal heat build-up during operation.
• Extended service life when used within specifications.
• Small footprint and consistent switching performance.
• Suitable for battery-operated applications.

Drawbacks

• Control circuitry can be more complex due to polarity reversal or reverse pulses.
• Higher initial cost in designs using permanent magnets.
• Holding force may be lower than some continuous-duty solenoids.
• Performance is sensitive to magnetic circuit design and assembly accuracy.

Typical applications

• Vending machine dispensing mechanisms.
• Smart locks and access control systems that must retain state during power loss.
• Portable medical devices and precise fluid control systems.
• Industrial automation for actuator switching and positioning.
• Household appliances, smart meters, communication and automotive systems.

Troubleshooting summary

• Solenoid fails to activate: check supply voltage, wiring, control signal and coil resistance.
• Slow movement or plunger sticking: inspect and clean guide tube, lubricate if specified, replace deformed parts.
• Overheating: verify rated voltage, reduce duty cycle and improve cooling.
• Inconsistent latching: check magnet strength, pulse control accuracy and magnetic circuit alignment.
• Excessive noise: tighten mounting, replace worn guide tube/plunger and add damping if needed.

Purchasing / selection checklist

• Operating voltage (typical: 12 V / 18 V / 24 V DC); confirm coil rating.
• Required stroke length (typical 2–20 mm; WL0724 customizable 3–8 mm).
• Required holding and actuation forces.
• Response time and switching speed requirements.
• Duty cycle and expected operating frequency.
• Installation space, mounting style and plunger action (pull or push).
• Environmental conditions: temperature, humidity, dust and vibration.
• Expected service life (cycles) and required reliability tests.
• Available customizations: voltage, stroke, waterproofing, plunger design.

Product Datasheet (selected specification table)
Brand: Weilong
Model Number: WL0724
Rated Voltage (V): DC 12V, 18V and 24V
Rated Power (W): 24 W
Work Model: Pull Push Type
Holding Force (N): 280 GF
Stroke (mm): 3-8 MM Customized
Reset Time (s): 0.2S ON, 2S OFF
Service Life: 100 Thousand Times
Certification: CE, ROHS, ISO9001
Material: Superior Magnet Iron
Lead Wire Length (mm): 200 MM
Install Style: Screw
Tolerance of Dimension: +/- 0.1 MM
Water-proof: None
Insulation Class: B
Hi-Pot Test: AC 600V 50/60Hz 2s
Non-excitation Holding Force: 0
Working Temperature: -10°C - 100°C
Duty Cycle: 1-100%
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

Technical specifications

• Brand: Weilong
• Model: WL0724
• Rated voltages: DC 12V, 18V, 24V
• Rated power: 24 W
• Plunger type: Pull / Push
• Holding force: approx. 280 GF
• Stroke: customizable 3–8 mm
• Typical reset timing: 0.2 s ON, 2 s OFF
• Service life: ~100,000 cycles (manufacturer data)
• Insulation class: B; Hi-Pot: AC 600V 2 s
• Lead wire length: 200 mm
• Mounting: screw
• Dimensional tolerance: ±0.1 mm
• Operating temperature: -10°C to 100°C
• Duty cycle: 1–100%
• Certifications: CE, RoHS, ISO9001
• Warranty: 1 year