Overview
The Ferraz Shawmut US3J2I fuseholder is a finger-safe, modular Class J fuse holder rated for 30A at 600VAC/VDC. The UltraSafe™ design meets IP20 protection grade under IEC standards, making it suitable for control panels and industrial automation enclosures where safety and ease of installation are critical. This two-pole unit features DIN-rail snap mounting and a blown-fuse indicator on each pole for quick visual fault detection.
Key Features
- Finger-Safe Design: Qualifies as “finger-safe” to IP20 grade under IEC standards—reduces accidental contact risk during fuse changes.
- Blown Fuse Indicator: Built-in indicator on each pole for immediate fault visibility.
- DIN-Rail Mount: Snap-mounted to 35 mm DIN rail with latch stays in open position for repositioning flexibility.
- Compact Footprint: Reduces installation time and saves panel space compared to traditional fuse blocks.
- Class J Rated: Accommodates 22 × 58 mm French ferrule Class J fuses rated 30A.
- Screw Terminal Connection: Accepts 14 to 2 AWG wire for panel wiring.
Technical Specifications
Ferraz Shawmut US3J2I electrical and mechanical details:
- Part Number: US3J2I (W213942)
- Series: UltraSafe™ US3J
- Current Rating: 30 Amperes
- Voltage Rating: 600 VAC / 600 VDC
- Poles: 2 (dual-pole)
- Fuse Class: Class J (22 × 58 mm)
- Wire Size: 14 to 2 AWG
- Connection Type: Screw Terminal
- Mounting: DIN Rail (35 mm) snap-mount
- Fuse Indication: Blown-fuse indicator per pole
- Dimensions: 2.56 in W × 3.15 in D × 4.49 in H
- Standards: UL, CSA, IEC IP20
Typical Applications
The US3J2I is commonly used in:
- Control panel and machinery fuse protection circuits
- PLC and HMI system power distribution
- Industrial automation equipment and motion control systems
- Motor control circuits and branch circuit protection
- OEM panel builders and system integrators seeking compact, safety-rated fuse switching
Compatibility & Replacements
Compatible With
- 35 mm standard DIN rail mounting systems
- Class J fuses (French ferrule type, 22 × 58 mm, 30A rated)
- Industrial automation control panels and enclosures
- Standard panel wiring (14–2 AWG screw terminals)
Replaces / Drop-In Replacement For
- Ferraz Shawmut US3J series single and multi-pole configurations
- Legacy Class J fuse holders with finger-safe requirements
- Verify specific replacement compatibility with your system integrator before ordering
Works With
- Mersen (formerly Ferraz Shawmut) UltraSafe™ fuse ecosystem
- Any Class J fuse rated 30A, 600V, 22 × 58 mm (French ferrule)
- DIN-rail-based modular control systems and multi-pole assembly kits
- Industrial electrical safety standards (UL, CSA, IEC)
