As a premier custom solenoid coil manufacturer, JHCOILS engineers high-performance electromagnetic coils that provide the precise linear force for your most demanding applications. We specialize in tailoring every aspect of the solenoid coil—from voltage and power to materials and encapsulation—to ensure optimal performance and seamless integration.
Solenoid valve coil is a kind of coil installed inside the solenoid valve. The main function of this coil is to play an electric AC role.
A solenoid coil is a precisely wound electromagnetic coil that, when energized with an electric current, creates a concentrated and uniform magnetic field. This field is used to actuate a movable ferromagnetic plunger (or armature), converting electrical energy into precise, fast-acting linear mechanical force. This fundamental principle powers valves, locks, actuators, and relays across countless industries.
While standard solenoids exist, a custom solenoid coil is essential when off-the-shelf components fail to meet specific requirements for force, speed, power consumption, environmental resistance, or physical size. At JHCOILS, we address these challenges by engineering coils that are perfectly optimized for your system, ensuring reliability and efficiency.
We are more than just a manufacturer; we are your development partner. Our services cover the entire product lifecycle.
We quickly translate your designs into functional prototypes for testing and validation. Our agile process allows for rapid iteration, ensuring the final design is perfected before mass production.
Have an obsolete or underperforming coil? We can analyze existing components to replicate or improve upon their design, providing a modern, reliable replacement that meets or exceeds original specs.
For unique form factors or integrated assemblies, we design and create custom molds for plastic overmolding and encapsulation, ensuring a perfect fit and robust environmental protection.
The electrical characteristics are fundamental to a solenoid coil’s performance. We provide complete control over these critical parameters.
Estimate winding resistance, DC current and copper loss from your winding and drive inputs before specifying a solenoid coil.
Calculate DC resistance and lossForce and temperature rise require separate verification for the complete actuator and its operating conditions.
A solenoid coil's reliability depends on its ability to withstand its operating environment. We build robust coils using a wide range of materials and protection methods.
As a leading custom solenoid coil manufacturer in China, JHCOILS delivers high-reliability solenoid coils for automotive, industrial automation, and electromechanical applications, from prototype to mass production.
Coil winding is the core process of custom solenoid coil manufacturing. JHCOILS uses precision winding machines to control turns count, wire tension, and layer alignment. We support enamel copper wire and high-temperature wire for automotive solenoid coils, ensuring stable resistance, inductance, and magnetic force. Uniform winding improves durability, reduces heat generation, and meets long-life requirements in automotive and industrial environments.
After winding, coil leads are welded to skeleton pins or terminals using controlled soldering or welding processes. This ensures low contact resistance, strong mechanical strength, and vibration resistance, which are critical for automotive solenoid applications. Each joint is inspected to prevent cold solder and ensure long-term electrical reliability in harsh operating conditions such as heat, shock, and continuous duty cycles.
All custom solenoid coils undergo strict testing before delivery. Our detection process includes resistance, inductance, insulation resistance, withstand voltage, and pin-hole testing. These inspections ensure compliance with automotive-grade quality standards and stable performance under high temperature and long operating cycles. 100% testing minimizes failure risk and guarantees consistent batch quality.
After final inspection, solenoid coils are packed using protective, anti-static, and shock-resistant packaging based on customer requirements. We support labeling, lot traceability, and export-standard packaging for automotive and industrial customers. Secure packaging ensures coils arrive ready for assembly, maintaining quality during global transportation.
Our 3000m² vertically integrated factory is the foundation of our capabilities as a custom solenoid coil manufacturer. We combine advanced technology with proven processes.
Duty cycle is the percentage of time a solenoid can be energized without overheating. A 100% duty cycle means it can be left on continuously. An intermittent duty cycle (e.g., 25%) means it can be on for 1 minute out of every 4. We design the coil specifically for your required duty cycle.
As temperature increases, the resistance of the copper wire also increases. This reduces the current for a given voltage, which in turn reduces the magnetic force. Our engineers account for your operating temperature range when designing the coil to ensure it performs reliably.
To provide an accurate quote, please provide the required voltage (AC/DC), power or current limit, duty cycle, required force at a specific stroke, any dimensional constraints, the operating environment (temperature, exposure to moisture), and the desired electrical connector.
Yes. As a flexible custom solenoid coil manufacturer, we are equipped to handle orders of all sizes, from a few dozen prototypes to large-scale mass production runs of thousands of units.
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