Description
The Mersen FBJ303X is a 30A heavy-duty front- and side-operated fusible disconnect switch from the FB series, engineered for demanding industrial power control and service entrance applications. Built to UL98/UL489 standards, it manually makes and breaks circuits under full load while providing ultimate short-circuit protection when paired with Mersen Class J fuses.
Featuring double-break contacts per pole to guarantee complete galvanic isolation of the fuses in the OFF position, the FBJ303X includes standard fuse covers and line-side shrouding for touch-safe operation. Designed in a compact 3-pole configuration supporting 30A current ratings, it incorporates advanced features such as padlockable handle mechanisms and robust load-break performance.
Key Features
- Double-Break Contacts: Dual break per pole ensures complete galvanic isolation of the fuses when switched to the OFF position.
- Service Entrance Rated: Built and approved for demanding service entrance and heavy-duty industrial load-break applications.
- Comprehensive Safety: Supplied with standard fuse covers and line-side shrouding to protect against accidental contact.
- Flexible Operation: Front- and side-operated configuration adapts easily to various panel layouts and enclosure designs.
- Class J Integration: Optimized to deliver exceptional short-circuit protection using Mersen Class J fuses.
Specifications
| Technical Specification | Detail |
|---|---|
| Product Model | FBJ303X |
| Brand | Mersen (Ferraz Shawmut Canada, Inc. / FB Series) |
| Product Type | 30A Fusible Disconnect Switch |
| Ampere Rating | 30 A |
| Voltage Rating | 250 VAC |
| Number of Poles | 3-Pole |
| Design Standards | UL 98 / UL 489 Compliant |
| Contact Design | Double-break per pole |
| Compatible Fuses | Mersen Class J Fuses |
| Safety Features | Touch-safe fuse covers, line-side shrouding, OSHA padlocking capability |
| Primary Applications | Industrial motor control, service entrance panels, load-break circuit isolation |
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