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Mersen PC73UD90V10CD1A / L300574 Protistor Size 73 aR High-Speed Fuse, 1000A, 900VAC (IEC), DIN 110 Blade Terminals

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Mersen Protistor size 73 aR square-body high-speed fuse-link for semiconductor protection in inverters, motor drives, UPS systems, and related power conversion equipment. This DIN 110 blade variant delivers ultra-fast, current-limiting performance with very low I²t to protect diodes, thyristors, and IGBT devices. Contact surfaces are silver plated and hardware is non-magnetic; an optional low-voltage trip-indicator can operate a field-mountable microswitch.

  • aR Class per IEC 60269-4 and VDE 636-23
  • Rated current 1000 A
  • Rated voltage 900 VAC (IEC) / 1000 VAC (UL)
  • Rated breaking capacity 150 kA AC
  • Very low I²t: 370 kA²s pre-arcing; 1920 kA²s clearing at rated voltage
  • Power dissipation at In: 174 W
  • DIN 110 blade terminals; optional trip-indicator to drive microswitch
  • Silver-plated contacts; non-magnetic hardware
  • UL/CSA Recognized (E76491); CCC GB 13539.4; CE marking applicable ≤1000 VAC
  • Package: 1; weight: 1.12 kg
Catalog Number PC73UD90V10CD1A
Item Number L300574
Brand Mersen
Product Series / Family Protistor size 73
Product Category Square body high-speed fuse-link (Semiconductor Protection Fuse)
Speed / Characteristic aR (ultra-fast acting)
Product Size 73
Rated Current (In) 1000 A
Rated Voltage AC (IEC) 900 V
Rated Voltage AC (UL) 1000 V
Pre-arcing I²t 370 kA²s
Clearing I²t at Rated Voltage 1920 kA²s
Rated Breaking Capacity AC 150 kA
Power Dissipation at In 174 W
Voltage Range AC (Family) 600 ... 1250 VAC
Ampere Range (Family) 315 ... 1800 A
Interrupting Rating AC (Family) 100 ... 185 kA
Body Style Square body
Terminal Type DIN 110 blades
Contact Surface Finish Silver plated
Hardware Non-magnetic
Body Width 73 ± 1.4 mm
Reference Dimension 78.5 mm (see drawing)
Drawing Reference size 73 aR type DIN 110 (105714), dimensions in mm
Weight 1.12 kg
Package Quantity 1
Trip-Indicator / Microswitch Compatibility Low-voltage trip-indicator optional; can operate a field-mountable microswitch
Operating Temperature Range [Not Found in Source]
Storage Temperature [Not Found in Source]
Ingress Protection (IP) [Not Found in Source]
IEC Compliance IEC 60269-4
VDE Standard VDE 636-23 (aR class)
UL / CSA Recognition UL/CSA Recognized E76491; UL certified status: ✓
CCC (China) GB 13539.4 (Asian market only)
CE Marking Only for voltages ≤ 1000 VAC
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