Overview
The Ferraz Shawmut USM3I Y219073D is a 3-pole modular fuse holder designed for midget-size fuses in industrial control and power distribution systems. Part of Mersen’s UltraSafeâ„¢ series (Ferraz Shawmut is now part of Mersen), this fuse holder combines finger-safe design, quick-change convenience, and robust construction for demanding electrical applications. The Y219073D designation confirms the 3-pole configuration with visual blown-fuse indicators in each pole.
Key Features
- Finger-Safe Design: Meets IEC and DIN standards for IP20-grade protection, allowing safe fuse changes without deenergizing circuits
- Quick-Change Mechanism: Enables rapid fuse replacement with a simple flick-of-the-finger operation
- Blown-Fuse Indicators: Visual indicators in each of the 3 poles for immediate fault detection
- DIN Rail Mounting: Snap-on 35mm DIN rail installation for standard panel configurations
- Dual AC/DC Rated: Operates reliably in both AC and DC applications with high interrupting capacity
- Tough Polyamide Body: Durable, corrosion-resistant construction rated for harsh industrial environments
Technical Specifications
The following specifications define the electrical and mechanical performance of this fuse holder:
- Voltage Rating: 600V AC nominal, 800V AC maximum, 1000V DC maximum
- Amperage Rating: 30A
- Number of Poles: 3
- Fuse Type: Midget (1-1/2″ × 13/32″)
- Mounting Style: 35mm DIN rail (snap-on)
- Interrupting Rating: 100kA DC, 200kA AC
- Wire Termination: Pressure plate terminals accepting 14 to 6 AWG wire
- Body Material: Polyamide
- Dimensions: 2.07″ L × 3.07″ W × 2.32″ H
- Weight: 0.43 lbs
- Certifications: UL Listed, finger-safe to IP20 (IEC/DIN)
Typical Applications
The USM3I Y219073D is commonly used in:
- Industrial motor control centers and power distribution panels
- PLCs, drives, and servo motion systems requiring compact fuse protection
- Control transformers and auxiliary power circuits
- Machine tool and automation equipment
- HVAC and pump protection circuits
- Any application requiring modular, finger-safe fuse holder protection
Compatibility & Replacements
Compatible With
- Standard 35mm DIN rail mounting systems
- Midget fuses rated 1-1/2″ × 13/32″ up to 30A
- Both AC and DC electrical systems
- Industrial control panels and electrical enclosures
- Mersen/Ferraz Shawmut modular fuse block configurations
Replaces / Drop-In Replacement For
- Earlier Ferraz Shawmut USM3I models without the Y219073D designation
- Legacy 3-pole midget fuse holder applications where quick-change and finger-safe design is required
- Verify compatibility with your system integrator before ordering to ensure proper pin configuration and termination style
Works With
- Mersen/Ferraz Shawmut UltraSafeâ„¢ modular fuse block systems
- Standard midget fuse types and amperage ratings up to 30A
- Industrial electrical distribution and control architectures
- Both AC frequency (50/60 Hz) and DC power systems
