Overview
The Ferraz A025R400 is a high-current semiconductor fuse engineered for industrial electrical systems requiring robust overcurrent protection. With a 250V AC/DC voltage rating and 400A current capacity, this fuse protects power supplies, motor controls, drives, and other large-load equipment from fault conditions. Manufactured by Ferraz (acquired by Mersen), a recognized leader in electrical protection, the A025R400 combines fast-acting response with proven reliability in harsh industrial environments.
Key Features
- 250V AC/DC voltage rating for standard industrial power systems
- 400A continuous current rating for high-capacity applications
- Semiconductor-grade construction for sensitive electronic equipment protection
- Fast-acting response minimizes collateral circuit damage during fault events
- Industry-standard form factor compatible with common fuse blocks and clips
- UL and CSA certified for North American industrial compliance
Technical Specifications
- Voltage Rating: 250V AC/DC
- Current Rating: 400A
- Fuse Type: Semiconductor / Fast-Acting
- Series: A025R
- Part Number: A025R400 / 08-23-070024
- Interrupting Rating: 200 kA @ 250V (typical for this class)
- Mounting: Cartridge fuse (bolt-down or clip-mounted block)
- Standards: UL 248-12, CSA C22.2
- Temperature Range: –40 °C to +70 °C (typical)
Typical Applications
- AC/DC variable frequency drives (VFD) input protection
- Power distribution panels and switchgear
- Industrial motor starter circuits
- DC bus protection in servo systems and motion control
- Semiconductor rectifier and converter protection
- Large industrial power supplies and UPS systems
Compatibility & Replacements
Compatible With
- Ferraz fuse blocks rated for 400A, 250V
- Standard bolt-down and clip-mounted fuse holders
- Industrial power distribution equipment (400A bus rated)
- DC and AC control systems
- OEM industrial equipment with 250V/400A fuse specifications
Replaces / Drop-In Replacement For
- Ferraz A025R400 (cross-reference part: 08-23-070024)
- Verify compatibility with your original equipment documentation or system integrator before ordering, as semiconductor fuse specifications may vary by manufacturer.
Works With
- Ferraz/Mersen fuse accessories and blocks
- Standard industrial UL 248-12 and CSA C22.2 compliant systems
- AC and DC power distribution architectures
- Semiconductor protection applications requiring fast response
