Overview
The Ferraz Shawmut A70QS35 is a 35-amp semiconductor protection fuse rated at 700V AC and 700V DC. Engineered as an Amp-Trap® fuse, it delivers superior performance for protecting solid-state equipment including variable frequency drives (VFDs), motor drives, uninterruptible power supplies (UPS), and inverter circuits. The extremely fast-acting characteristic ensures rapid response to overcurrent conditions, minimizing equipment damage.
Key Features
- Extremely Fast-Acting — Responds rapidly to fault currents, protecting sensitive semiconductor components
- Lower I²t Rating — Reduces let-through energy for improved equipment protection
- Reduced Watts Loss — Minimizes heat generation and improves system efficiency
- Long Cycle Life — Maintains performance under repetitive surge conditions typical in motor drives and UPS systems
- UL Listed & CSA Certified — Meets regulatory requirements for North American industrial applications
Technical Specifications
- Current Rating: 35 Amperes
- Voltage Rating: 700V AC / 700V DC
- Interrupt Rating AC: 200 kA @ 700V AC
- Interrupt Rating DC: 100 kA @ 700V DC
- Form Factor: Form 101 (Cartridge)
- Connection Type: Box Lugs
- Tripping Characteristic: Extremely Fast-Acting (A70QS Series)
- Certifications: UL Listed (Guide No. JFHR2), CSA Approved
Typical Applications
- Motor variable frequency drives (VFDs) and soft starters
- Uninterruptible power supply (UPS) systems
- Power inverters and rectifiers
- Industrial power conversion equipment
- Semiconductor protection in 700V DC circuits
Compatibility & Replacements
Compatible With
- 700V AC/DC motor drive systems
- UPS battery backup systems
- Industrial power inverters
- Semiconductor circuit protection schemes up to 700V
- Standard bolt-in and box-lug fuse holders rated for Form 101 cartridges
Replaces / Drop-In Replacement For
- Previous generation A70QS35 models
- Other 35A 700V extremely fast-acting semiconductor fuses in Form 101 configuration
- Verify compatibility with your system integrator before ordering for critical applications
Works With
- Ferraz Shawmut fuse holders and power distribution blocks rated for A70QS series
- Industrial control systems requiring 700V semiconductor protection
- Renewable energy and power conversion equipment
- Standard fuse accessories compatible with Form 101 cartridge geometry
