The QHFT200F (YL681001-AF) is a 200 A, 690 V DC high-speed fuse link with integrated touch-safe front-indicator holder. Designed for ultra-rapid arc-quenching in under 1 millisecond, this solution provides critical protection for IGBT bridges, DC-bus capacitors, and semiconductor contactors within ABB DCS/ACS drives, ensuring compliance with SIL 2 and IEC 60269-4 standards for demanding industrial applications.

• 200 A rated current - Continuous operation up to 45°C without derating
• 690 V DC maximum voltage - Compatible with 400-690 V AC drives (540-930 V DC bus)
• Ultra-rapid interruption - I²t let-through
• Visual striker indicator - Front red pin extends when blown, visible with door closed
• Touch-safe holder - IP20 finger protection, lockable in open position
• Low power loss -
• Global certifications - CE, UL 248-13, IEC 60269-4, RoHS, REACH

• DCS-800 / ACS-880 DC-bus protection (540-930 V)
• Metals reversing-mill DC bridges
• Crane hoist VFD semiconductor protection
• Marine thruster drives (ABS approved)
• Large test-bench power supplies

• DC Drives: DCS-800 (frames B-R), DCS-600 (retrofit)
• AC Drives: ACS-880-04, ACS-880-07 (common DC bus)
• Fuse Holders: YL681001-AF (included), QHFT-200-HL (remote)
• Monitoring: 1SBP260020R1001 micro-switch (optional blown indication)

1. De-energize drive - implement lock-out/tag-out per local safety codes
2. Insert fuse - slide into holder until latch clicks; red pin should be flush
3. Torque bus bars - 12 N*m (M8) or 18 N*m (M10) per ABB manual specifications
4. Power-up - verify green "DC" LED on drive; record initial current readings
5. Annual inspection - perform IR scan
6. Replacement after blow - red pin extends visibly; reset micro-switch if installed