Overview
The Gould Shawmut A50P600 is a Type 4 Form 101 Amp-Trap semiconductor protection fuse engineered for applications requiring superior fault protection and rapid response. Rated for 600A at 500V AC (also suitable for 450V DC applications), this high-speed, current-limiting fuse provides lower I²t values and exceptional reliability compared to standard industrial fuses. Ideal for protecting DC drives, uninterruptible power supplies, rectifier circuits, and semiconductor equipment from damaging overcurrent and short-circuit conditions.
Key Features
- High-speed, fast-acting Type 4 design for rapid fault isolation
- Current-limiting technology reduces peak let-through current and I²t energy
- Bolt-in blade mounting (2″ diameter x 4.47″ length) for standard Form 101 fuse holders
- Dual-voltage rating: 500V AC / 450V DC operation
- 100 kA interrupt rating at 500V AC (79 kA at 450V DC)
- Maximum operating temperature: 150°C
- UL Listed (JFHR2 guide number) and RoHS compliant
Technical Specifications
| Part Number | A50P600 (A50P600-4) |
| Current Rating | 600A |
| Voltage Rating | 500V AC / 450V DC |
| Fuse Type | Type 4 Semiconductor Protection |
| Form Factor | Form 101 Amp-Trap |
| Interrupt Rating | 100 kA @ 500V AC; 79 kA @ 450V DC |
| Speed | High Speed (Fast Acting) |
| Dimensions | 2″ Diameter × 4.47″ Length (50.8 × 113.54 mm) |
| Weight | 1.2 lbs |
| Maximum Temperature | 150°C |
| Certifications | UL Listed (JFHR2); RoHS Compliant |
| Manufacturer | Gould / Ferraz Shawmut (now Mersen) |
| Series | A50P Amp-Trap Form 101 |
Typical Applications
- DC Drives & Variable Frequency Drives: Protects solid-state rectifier and drive circuits from fault current
- Uninterruptible Power Supplies (UPS): Safeguards inverter and battery-charging circuits
- Power Semiconductor Equipment: Guards HVDC converters, thyristor stacks, and semiconductor loads
- Industrial Rectifier Systems: Delivers fast coordination in multi-stage protection schemes
- Critical Control Circuits: Ensures minimal damage and rapid isolation in fault conditions
Compatibility & Replacements
Compatible With
- Form 101 bolt-in fuse holders (standard industrial and OEM designs)
- 500V AC control circuits and power distribution systems
- 450V DC rectifier and drive circuits
- UPS systems and semiconductor protection applications
- Any circuit requiring Type 4 (fast-acting) Amp-Trap fuse protection
Replaces / Drop-In Replacement For
- Older Gould A50P600 units
- Ferraz Shawmut A50P600-4 (direct equivalent)
- Shawmut A50P600 variants
Works With
- DC drive and motor control systems
- Three-phase rectifier and converter systems
- UPS and battery backup systems
- Semiconductor test and protection equipment
- Industrial switchgear and distribution panels rated for 500V AC / 450V DC operation
