Latching Solenoids
Latching Solenoids (Permanent Magnet Solenoids)
Latching solenoids use a permanent magnet to maintain the plunger in its actuated position after energization. Once the plunger has moved into position, power can be removed while the permanent magnetic field continues to provide the holding force, resulting in extremely low power consumption.
Unlike holding solenoids that require continuous energization, latching solenoids consume power only during actuation and release. This design minimizes energy consumption, reduces coil heating, and improves long-term reliability.
Latching solenoids are ideal for applications requiring low power consumption, long-duration holding, and reliable positioning, such as electronic locks, access control systems, industrial automation, and battery-powered devices
Latching Solenoid (Pull Type) Diagram
Latching Solenoid (Push Type) Diagram
High-Standard Quality Control
Holding force is influenced by factors such as the flatness and surface finish of the contact area, as well as the plating thickness of the mating metal surface.
Magtek combines stringent material quality control with 100% in-line inspection throughout the manufacturing process to ensure consistent product performance. Every unit is verified to meet customer specifications for holding force and release current.
100% Holding Force Inspection via Dead Weight Testing
100% Inspection of Maximum and Minimum Release Current Using Dedicated Test Fixtures
AQL Outgoing Inspection Using Automated Holding Force Testing Systems
Housing configurations can be customized in open frame, tubular or other special designs to suit the customer’s mounting requirements.
A variety of coil configurations are available, including single-coil, double-layer coil, double coil (continuous-duty), and other customized designs to meet specific application requirements.
| Item | Insulation Class | Coil Temperature Rise | Insulation Resistance | Dielectric Strength | Ambient Temperature Range | Service Life |
|---|---|---|---|---|---|---|
|
MTOK Series |
Class A (105°C) |
≤65°C (Continuous Duty) |
100MΩ/DC 500V (Room temperature / Room humidity) |
AC 1000V, 50/60 Hz, 1Min (Room temperature / Room humidity) |
-20°C to +40°C |
≥500,000 cycles |
Single-Coil Configuration
The single-coil configuration uses a single coil to actuate the plunger. When the coil is energized, a magnetic field is generated to pull the plunger into position. After the plunger has actuated the mechanism, power can be removed while the built-in permanent magnet securely holds the plunger in place, significantly reducing power consumption.
To reset the plunger, simply apply a reverse voltage to the coil to reverse the magnetic field and release the permanent magnet's holding force.
Double-layer Coil Configuration
The double-layer coil configuration utilizes an inner coil and an outer coil integrated into a single coil assembly. It is typically equipped with three lead wires, one of which serves as a common wire.
By energizing either the inner or outer coil, the magnetic field is reversed to control the latching and release of the plunger. This design provides reliable switching performance while maintaining a compact coil structure.
Double Coil Configuration (Continuous Duty)
For applications requiring continuous-duty operation, a double configuration is available.
The pull-in coil is energized with a higher current to generate the force required for rapid actuation. Once the plunger reaches the end of its stroke, the pull-in coil is switched off while the holding coil remains energized with a much lower current to securely maintain the plunger position.
By separating the pull-in and holding functions, this configuration greatly reduces power consumption and coil temperature rise, enabling reliable long-term continuous operation without overheating.