Bistable permanent lifting magnet WL3529

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Overview
A latching electromagnet (bistable/permanent-assisted) that retains holding force without continuous power. WL3529 combines a permanent magnet and an electromagnetic coil to consume energy only during state changes (energise-to-release). Designed for compact industrial and battery-powered systems where low standby consumption and reliable hold are required.

Benefits

• Low energy consumption: power required only during switching pulses.
• Maintains holding force during power loss, improving safety in critical systems.
• Reduced coil heating and longer coil life due to intermittent energizing.
• Compact Ø35 x H29 mm construction for embedded installations.
• Fast, repeatable switching when driven with appropriate polarity-reversal control.

Problems / Considerations

• Requires polarity-reversal or bidirectional drive circuitry to switch, adding control complexity.
• Magnetic balancing and mechanical tolerances must be engineered to ensure consistent holding force.
• Initial unit cost may be higher than simple electromagnets due to permanent magnet materials and driver requirements.
• Incorrect reverse-voltage or inadequate driver pulses can prevent release; follow force/voltage curves and driver specs.

Applications
Typical industrial uses for WL3529 include:

• Industrial automation, PLC-controlled actuators and smart control systems
• Safety locks, interlocks and access-control latches
• Power distribution panels and battery-powered equipment
• Robotics and automated manufacturing fixtures
• Medical equipment, vending machines and transit hardware
• Embedded devices requiring compact size and low standby power

How to Select a Latching Electromagnet
Key selection steps and checks:

• Determine required holding force (N): account for object mass, safety factor (typically 2–3×), surface condition and air gap (any gap reduces force significantly).
• Verify voltage and control method: common ratings 6 VDC, 12 VDC, 24 VDC; confirm single- or dual-coil design and need for polarity reversal. Ensure driver supports pulse power and reverse polarity.
• Consider duty cycle and switching frequency: estimate cycles and pulse length (ms); for high-frequency use, match coil thermal design.
• Check mechanical dimensions and mounting: Ø35 x H29 mm, install thread M5 x H19, lead wire orientation and connector options.
• Assess environmental resistance: operating temperature, humidity, contaminants and required IP level; permanent magnets can degrade at high temperatures.
• Evaluate safety and reliability: lifecycle data (>500,000 cycles), insulation class B, hi-pot test AC 750 V/2 s, and certifications (CE/ROHS).
• Request customization options: holding force, voltage, waterproofing, mounting variants, cable length and connector types.

Datasheet (WL3529 Permanent Electromagnet Products Data Sheet)
Product name: Permanent Electromagnet
Insulation Class: B
Model: WL-3529-24V
Hi-Pot test: AC 750V / 2S
Size: Ø35 x H29 mm
Service Life: >500,000 cycles
Force: 30 kg / 300 N
Lead time: 3–5 days if in stock
Voltage: DC 12V / 24V (6V variants possible)
Sample Order: Acceptable
Power: 28 W (pulse)
MOQ: 2 pcs
Duty Cycle: 10%
Warranty: 2 Years
Lead Wire: bottom edge out 25 cm (customizable)
Origin: Dongguan, Guangdong, China
Action Form: Energise to release (requires polarity reversal)
Surface: Electroplating (zinc coating)
Install Thread size: M5 x H19
Material: steel & enameled wire
Net weight: 168 g
Certificates: CE / ROHS

WL3529 Latching Electromagnet - Selection Checklist (quick)

• Required holding force
• Control type and voltage
• Switching frequency and duty cycle
• Installation size and mounting
• Environmental conditions and IP needs
• Safety requirements and test reports
• Customization capability

FAQ (selected)

• What is a latching electromagnet? — A bistable device that holds position without continuous power using a permanent magnet combined with a coil.
• How does it differ from a regular electromagnet? — Regular electromagnets need continuous power to hold; latching types retain hold when power is removed.
• Does it require opposite polarity to release? — Yes; reverse polarity/current is typically used to change state.
• What voltage options exist? — Common: 6 VDC, 12 VDC, 24 VDC; custom voltages possible.
• Can it be used for high-frequency switching? — Yes, if coil and thermal design suit the required switching rate.

Technical specifications

• Model / Series: WL3529
• Product type: Latching (permanent) electromagnet
• Size: Ø35 x H29 mm
• Holding force: 30 kg (300 N)
• Voltage options: DC 12V / 24V (6V variants possible)
• Power (pulse): 28 W
• Duty cycle: 10%
• Action form: Energise to release (polarity reversal required)
• Lead wire: bottom edge out 25 cm (customizable)
• Install thread: M5 x H19
• Material: steel and enameled wire
• Net weight: 168 g
• Insulation class: B
• Hi-Pot test: AC 750 V / 2 s
• Service life: >500,000 cycles
• Surface finish: Electroplating (zinc coating)
• Origin: Dongguan, Guangdong, China
• Warranty: 2 years
• Certificates: CE, ROHS
• MOQ: 2 pcs