Mersen D100QS90-4 D100QS Series High-Speed DC Fuse, 1000VDC, 90A aR 100kA IR, Round Body 4.38in - Pack of 5

Overview: The Mersen D100QS90-4 is a North American round-body high-speed semiconductor fuse from the D100QS Series. Rated 90 A at 1000 VDC (L/R ≤1 ms), it delivers very low I²t, low watts loss, and a high interrupting rating to protect DC power electronics and battery-related equipment. This item is sold as a pack of 5 units.

Key Features:

• 1000 VDC rating with L/R ≤1 ms time constant
• High interrupting rating: 100 kA IR (DC)
• aR characteristic for semiconductor short-circuit protection
• Low I²t and low watts loss for improved device protection
• Superior cycling capability; vibration resistant construction
• UL Recognized; REACH/RoHS compliant

Technical Specifications:

• Electrical rating: 90 A, 1000 VDC, L/R ≤1 ms, 100 kA IR
• Minimum Breaking Capacity (MBC): 1730 A at 1000 VDC; time to clear MBC: 40 ms
• Power dissipation: 11 W at 0.8×In; 20 W at In
• Mechanical/size (D100QS 50–100 frame): overall length 4.38 in (111 mm); body width 1.00 in (25.4 mm); mounting hole Ø 0.31 in (7.9 mm); terminal hole 0.75 in (19 mm); weight 0.12 kg per fuse
• Catalog suffix “-4Y” designates metric screws
• Compatible fuse blocks: 1SC/1MSC modular blocks up to 200 A; P266 for higher frames (see catalog)

Applications:

• High‑power battery charging and battery management systems
• Energy Storage Systems (ESS) and Battery Disconnect Units (BDU)
• DC fast‑charging stations and DC grids
• Backup protection for DC relays/disconnectors/switches
• Protection of UPS and inverters up to 1000 VDC