FAQ
These answers summarize common technical and sourcing questions. For application-specific requirements, send drawings or target specifications through RFQ.
Both types use electromagnetic attraction. A pull solenoid pulls the plunger inward when energized. A push solenoid uses a push rod or mechanical arrangement so that the output motion pushes outward as the plunger is attracted.
Lifecycle depends on load, stroke, side load, mounting, surface treatment, duty cycle, and environment. For standard use, lifecycle can range from hundreds of thousands to millions of cycles, but OEM projects should define the expected cycle requirement during RFQ review.
A DC solenoid does not have the same inrush behavior as many AC coils, but switching the coil off can generate back electromotive force. A diode or other surge protection method is usually recommended for the drive circuit.
Duty cycle is the ratio of energized time to the total on/off cycle time. Lower resistance coils can generate stronger force but more heat, so the rated duty cycle must be respected.
Continuous duty is possible only when the coil and thermal conditions are designed for it. Ambient temperature, mounting, heat dissipation, voltage, and insulation limits should be tested in the actual product environment.
Start from the product's available power supply and drive circuit. Common DC values include 12 VDC and 24 VDC, but force, resistance, power, heat, and duty cycle must be reviewed together.
A solenoid is an electromagnet. Magnetic attraction is stronger when the plunger is closer to the fixed core and weaker when the air gap is larger. Force-stroke charts should be used as practical reference data.
Custom lead wire direction, connectors, mounting features, plunger shape, springs, and coil specifications can be reviewed for OEM projects. Minimum lot, tooling, and production constraints may apply.
Standard open solenoids generally need protection from water, condensation, freezing, and dust. If the application has environmental exposure, include the environment in the RFQ so sealing or enclosure requirements can be reviewed.
Send the application, motion type, voltage, stroke or rotation angle, force or torque, duty cycle, dimensions, operating environment, lifecycle target, quantity, annual volume, drawings, and existing part references if available.