Mersen A25X200-4 Semiconductor Fuse 200A

Product Description

The MERSEN A25X200-4 is a 200-amp semiconductor protection fuse designed for high-speed overcurrent protection in power electronics applications. Semiconductor fuses are engineered to clear fault currents faster than standard class fuses, protecting diodes, thyristors (SCRs), IGBTs, and similar solid-state devices from thermal and I2t damage. This fuse is installed by licensed electricians and power electronics technicians working on variable frequency drives, rectifiers, soft starters, and DC bus circuits where component protection is critical.

The A25X200-4 is suited for industrial and commercial power conversion equipment requiring fast-acting semiconductor fuse protection at 200 amps. Typical installation scenarios include drive panels, UPS systems, and motor control centers where solid-state switching devices must be protected against destructive fault events. Always verify voltage rating and I2t let-through values against the protected device specifications before installation.

Key Features

• 200-amp rated current for semiconductor circuit protection
• High-speed clearing action limits I2t energy let-through to protect solid-state components
• Designed for use with SCRs, IGBTs, diodes, and similar power semiconductor devices
• Suitable for industrial drive and power conversion applications

Compatibility

Designed as a high-speed semiconductor fuse for use in industrial power electronics equipment requiring 200-amp overcurrent protection. Confirm voltage class, mounting style, and I2t rating compatibility with the target equipment before installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize and lockout/tagout all circuits before handling or replacing fuses. Semiconductor fuses are not interchangeable with standard time-delay or fast-acting branch-circuit fuses -- always replace with the correct fuse type and rating specified by the equipment manufacturer. Verify that fuse holder and bus connections are rated for the ampacity and voltage of the replacement fuse.

Technical Specifications

• Current Rating: 200A
• Fuse Type: Semiconductor Protection Fuse
• UPC: 78200194258

Standard Information

• Brand: MERSEN
• Manufacturer Part Number: A25X200-4