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Mersen A50P1254 - Semiconductor Fuse 125A 500V (High-Speed Protection)

Mersen
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Mersen A50P1254 is a 125-amp, 500-volt AC/DC semiconductor protection fuse designed for high-speed overcurrent protection of power diodes, thyristors, and other sensitive power electronic components. This fuse delivers a high interrupting rating of 200,000 amperes RMS symmetrical at 500VAC, ensuring robust fault clearing in demanding circuits. Constructed with a compact, square-body design and silver-plated blade terminals, it measures approximately 2.75 inches in length and weighs 5.19 lb, featuring a ceramic body for superior arc extinction and thermal stability. The A50P1254 complies with UL 248-13 and IEC 60269-4 standards for semiconductor fuse performance, offering low I²t values for enhanced component protection. It is typically applied in variable frequency drives, DC power supplies, UPS systems, and other power conversion equipment requiring precise, fast-acting overcurrent protection.

Key Features & Specifications
  • Type: Semiconductor protection fuse, high-speed, square-body, ceramic body, silver-plated blade terminals
  • Voltage Rating: 500 VAC/VDC
  • Current Rating: 125 A
  • Dimensions: Approximately 2.75 in length
  • Standards: UL 248-13, IEC 60269-4
  • Applications: Variable frequency drives, DC power supplies, UPS systems, power conversion equipment
  • AIC rating: 200,000 A RMS symmetrical at 500VAC
  • Fuse Class: Semiconductor (aR)
  • Weight: 5.19 lb


Product Identification
  • Manufacturer: Mersen