Ceramic Body in Steatite C221 Type NH Fuses
Products Description

The Ceramic Body in Steatite C221 Type NH Fuses serves as a fundamental insulating structural component within traditional industrial power fusing systems. Typically featuring a yellow, square-shaped design, it is primarily utilized in low-voltage power distribution systems, industrial control cabinets, and conventional power protection devices.
Unlike fuses designed for new energy applications, traditional NH fuses place a greater emphasis on long-term operational stability and industrial power distribution safety. Consequently, the ceramic body must not only possess excellent insulating properties but also be capable of withstanding thermal shock, arc shock, and mechanical stress during continuous operation.
Manufacturing Advantages
Specialization in Dry Pressing
For components with regular square geometries-such as Fuse Casings Ceramic-we employ high-precision steel molds and a dry-pressing process. This method offers exceptional efficiency and ensures consistent green-body strength, making it ideally suited for high-volume production runs reaching into the millions.
Atmosphere-Controlled Sintering
By precisely controlling the kiln atmosphere, we ensure uniform grain growth within the material during the sintering process. This prevents defects such as "black cores" or over-firing, thereby guaranteeing consistent color and performance across every batch of Electrotechnical Ceramics.
Standardized Post-Processing
To meet the strict requirements for end-face flatness and side-wall parallelism mandated by NH standards, we utilize a customized precision-grinding process. This ensures the highest quality in the subsequent brazing or crimping of the Steatite Ceramic HRC Fuse Body to its metal end caps.

Detailed Features
Exterior Surface Characteristics
The surface of the talc porcelain appears milky-white to grayish-white; it features a smooth texture and is free of pores and cracks. The surfaces of select Din Type Steatite Ceramic HRC Fuse Body undergo a glazing treatment to further enhance their insulating properties.
Interior Wall Structure
The inner wall of the Alumina Ceramic Insulator for NH/Blade Type Fuses is cylindrical and has been finely polished to ensure it is free of burrs and surface irregularities. The inner diameter is precisely measured, with tolerances controlled within ±0.10 mm.
End Face Machining
The parallelism of the Steatite Ceramic HRC Fuse Body's two end faces is controlled within 0.1 mm, ensuring a tight fit with the fuse cap and base to prevent loosening during installation.

Application Areas
| Industrial Power Distribution Systems | Fuse Casings Ceramic is used for short-circuit protection for main circuits in various low-voltage distribution cabinets (such as GGD, GCK, etc.) and power distribution boxes. |
| Motor Control Centers | Electrotechnical Ceramics are used for overload and short-circuit protection components for large-scale AC asynchronous motors. |
| Buildings and Infrastructure | Din Type Steatite Ceramic HRC Fuse Body is used for circuit protection for commercial buildings, factory workshops, and auxiliary power supply systems in rail transit applications. |

contact us
Our Ceramic Body in Steatite C221 Type NH Fuses have been widely adopted in low-voltage power distribution projects worldwide; we offer both standard products and customized solutions. Should you require drawings or samples, please feel free to contact our engineering team for technical support and a quotation.
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