Spring Clip Fuse Holder
Products Description
Our spring clip fuse holders consist of a high-conductivity copper body and a highly elastic spring clip, forming a stable electrical contact and mechanical fixing system. Unlike traditional screw-fixed or plastic snap-on fuse holders, this product uses a pure metal spring clip design to provide constant clamping force, ensuring a low-impedance connection between the fuse and the holder, while also facilitating quick one-handed fuse replacement, significantly improving maintenance efficiency.
Key Technical Features:
Strong Spring Clip Design: The elastic clamping structure automatically adapts to fuse size deviations, providing sustained contact pressure.
One-Piece Stamped Copper Structure: High-purity T2Y2 material ensures excellent electrical and thermal conductivity paths.
Precision Tapping Holes: Supports reliable panel mounting or housing fixation, enhancing overall structural stability.
Anti-Loosening and Vibration Resistance: The spring clip and body design effectively resist contact degradation under vibration.
Multi-Size Compatibility: Adapts to common tubular fuse sizes, supporting applications with different current ratings.
Design Advantages: Cantilever Beam Mechanics and Ergonomic Insertion/Removal
| Constant Force Cantilever Clamping Topology | The cantilever beam dimensions and inner radius of the bend in the Copper Holder for Fuse Bases are optimized through topology calculations. When the fuse is pushed in, the cantilever undergoes elastic deformation, providing a smooth insertion/removal feel (ergonomic). After the fuse is in place, the normal force generated by the deformation is converted into a constant contact pressure of tens of Newtons, piercing the oxide film on the end cap surface and establishing a micro-ohm-level pure metal airtight connection. |
| Bidirectional Stress Relief Groove | A tiny stress relief groove is designed at the connection between the spring clip root and the base body. This not only eliminates stress concentration at the stamping and bending points, preventing metal fatigue fracture, but also provides a small deformation space when the screw is tightened, ensuring that the floating of the internal Fuse Holder for NH Fuse is not affected by the panel flatness after the base is installed on the PCB or guide rail. |
| Self-Orienting Contact Surface | The inner side of the Copper Holder for Fuse Bases adopts a micro-arc protrusion design, transforming surface contact into high-strength line contact, greatly improving the effective current conduction cross-section under the skin effect, while reducing frictional resistance during insertion and removal. |
Main Functions
Mechanical Support and Positioning of the Fuse
The NH Fuse Base Square Pipe Knifes securely hold the fuse body in a predetermined spatial position, resisting transportation vibrations, short-circuit electrodynamic forces, and thermal cycling stress.
01
Main Current Path Interface
Serves as a conductive bridge between the external circuit and the fuse element, carrying the rated current and allowing the fuse to melt and break under overload conditions.
02
Low-Resistance Insertion Contact
When the fuse is inserted, the textured piercing and normal pressure of the clamping platform establish a stable micro-ohm level contact resistance.
03
Heat Dissipation Node
Conducts Joule heat from the fuse cap and Blade Contact for Ceramic Fuse Base area to the external busbar or heat dissipation surface via the copper base, reducing heat buildup around the fuse.
04
Maintainable Replacement Interface
Supports tool-free, quick replacement of the fuse. When the fuse element melts, or during periodic maintenance, maintenance personnel can manually perform insertion and removal operations under energized or de-energized conditions (subject to specific safety procedures).
05
Manufacturing Advantages: Stress Freeze Control and Batch Consistency
Springback Prediction and Dynamic Die Compensation: Copper in the Y2 state exhibits slight springback after stamping and bending, which is the culprit for clamping force fluctuations. We establish a springback database through finite element analysis (FEA) and preset negative angle compensation during the die design stage, ensuring that the force value of the formed spring clamp falls precisely at the center of the tolerance zone after springback.
End-to-End Anti-Oxidation Passivation: Copper is highly susceptible to oxidation and blackening, leading to a significant increase in contact resistance. We introduce ultrasonic cleaning and anti-oxidation passivation processes after stamping and before electroplating to ensure that the exposed copper surface remains atomically pure before entering the tin plating bath. The tin plating layer uses a matte tin finish, ensuring excellent solderability and eliminating the short-circuit risk caused by tin whisker growth.
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We not only provide standardized Knife Type Contact for Fuse Link Base Holder products, but also offer integrated engineering support, from conductive structure optimization and material selection to mass production, tailored to customers' fuse structures, current requirements, assembly methods, and new energy system application scenarios. This helps projects achieve more stable and reliable long-term mass production applications.
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