Iron Coil
Products Description
The Iron Coil is the core magnetic metal component in the frame of various relays. Its core function is to rapidly accumulate a magnetic field when the electromagnetic coil is energized, driving the relay contacts to actuate; and to quickly demagnetize after power is de-energized, ensuring accurate relay reset.
It is compatible with various types of relays, including Iron Core for Industrial Control Relays and electromagnetic relays, and is a core component for improving relay response speed and stability.
Key Selling Points and Features
High Magnetic Permeability
Utilizes DT4C Iron Core (electrical pure iron DT4C material), with an initial permeability ≥3000mH/m and a maximum permeability ≥15000mH/m. Magnetic field response speed is 40% faster than ordinary steel.
Cold Forging Precision Forming
Manufactured using DT4C Relay Iron Core cold forging technology, surface roughness ≤Ra0.8μm, coaxiality tolerance ≤±0.02mm, no machining stress, resulting in more stable magnetic permeability.
Low Remanence
As soft magnetic iron cores for relays, remanence intensity ≤80A/m, no residual magnetic field after power failure, preventing relay contact adhesion.
Environmental Stability
Surface passivated, no rust after ≥48 hours of salt spray testing, suitable for industrial high and low temperature environments (-40℃~125℃).
Manufacturing Process Features
High material utilization: Approximately 95%, significantly reducing material waste.
Continuous fiber structure: Metal flow lines are continuously distributed along the Relay Steel Core's shape, improving mechanical strength and fatigue resistance.
Excellent surface quality: Surface finish of the Core for Electromagnetic Relay can reach Ra0.4-0.8, reducing the need for subsequent plating and enhancing corrosion resistance.
Excellent batch consistency: Suitable for high-volume, high-standard production needs.
Advantages Compared to Competitors
| Comparison Dimensions | Cold Forged DT4C | Turning |
| Magnetic Property Consistency | Excellent, dense material, uniform grains. | Average, greatly affected by turning stress. |
| Dimensional Accuracy and Appearance | Excellent, smooth Iron Coil surface. | Good, turning marks present. |
| Mechanical Strength | High, intact metal flow lines, bending resistance. | Low, fibers are cut. |
| Production Efficiency and Cost | High, Cold Forging Relay Core suitable for high-volume production, low overall cost | Low, significant material waste, high labor costs. |
| Environmental Protection and Sustainability | Excellent, high material utilization, low energy consumption. | Poor, generates large amounts of metal waste. |
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