Siemens Cylindrical Fuses

Cylindrical fuses are a versatile, widely used fuse type in industrial and commercial power distribution, providing protection against short-circuit and overload for a broad range of voltages and currents. Siemens offers cylindrical fuse links and matching fuse holders as part of their SENTRON protection systems, available globally and compliant with IEC 60269 and UL safety standards.

Key Siemens Cylindrical Fuse Features:

• Voltage ratings: Standard designs cover 500V, 600V, 690V AC, and up to 700V DC, making them suitable for both AC and DC applications.

• Current ratings: Options range from sub-1A (e.g., 0.5A) up to 100A, supporting selective protection for small circuits and higher power lines.

• Physical sizes: Common dimensions are 10 x 38 mm, 14 x 51 mm, and 22 x 58 mm.

• Utilization categories:

  • gG (general purpose): Overload and short-circuit protection for cables, lines, and equipment.

  • aR (semiconductor/ultra-fast): Specialized for protecting power electronic devices like drives/inverters/UPS (e.g., SITOR fuses).

  • gR, gL (less common): Other standards for varied or legacy applications.

• Breaking capacity: High—designed for industrial protection (often 50kA or more for AC).

• Design: Compact, cylindrical body for ease of installation and integration. Available with LED trip indicators or striker pins in select models.