Overview
The Bussmann NON-1 is a Class K5 general purpose, non-current-limiting fuse manufactured by Eaton. Rated at 1 Ampere and 250VAC/125VDC, the NON-1 delivers basic overload and short-circuit protection for low voltage circuits where transient surges are minimal. This one-time fuse must be replaced after operation and is commonly used in lighting panels, heating circuits, and general purpose branch circuits.
Key Features
- Class K5 Rating: General purpose, non-current-limiting design suitable for circuits without large motor loads
- One-Time Fuse: Single-use design requiring replacement after current overload
- 50 kA Interrupt Rating: Safely interrupts fault currents at both 250VAC and 125VDC
- Ferrule-End Terminals: Fits standard fuse holders and clips for direct replacement
- Compact Cartridge Style: 0.56″ diameter × 2″ length provides efficient panel space usage
- Box of 10: Bulk package reduces downtime on replacement inventory
Technical Specifications
- Ampere Rating: 1A
- Voltage Rating: 250VAC / 125VDC
- Interrupt Rating: 50 kA at 250VAC; 50 kA at 125VDC
- Fuse Class: K5 / Class H
- Type: One-time, non-current-limiting, non-indicating
- Terminal Style: Ferrule end × ferrule end
- Body Material: Melamine ceramic cartridge
- Dimensions: 0.56″ Dia. × 2″ Length (14.22mm × 50.8mm)
- Speed Rating: Medium/Normal blow (fast-acting)
- Certifications: UL, CSA, CE
- Packaging: Box of 10
Typical Applications
The NON-1 protects lighting circuits, heating systems, and other branch circuits not subject to large transients or motor overloads. Common applications include:
- Residential and commercial lighting panels
- Branch circuit protection for heating elements
- General purpose distribution boards where short-circuit currents are relatively low
- Equipment circuits without inductive or motor loads requiring time-delay protection
Important: Do not use NON-1 fuses in circuits with motors, large transformers, or where temporary surge current is expected. For motor and time-delay applications, substitute with Bussmann FRN-R (Fusetron) or LPN-RK (Low-Peak) time-delay fuses.
Compatibility & Replacements
Compatible With
- Standard fuse clips and cartridge holders (ferrule-end design)
- Plug fuse sockets and panel-mount cartridge blocks
- Bussmann fuse boxes and distribution equipment
- Industrial and residential electrical panels rated for Class K fuses
Replaces / Drop-In Replacement For
- Littelfuse NLN-1 fuse
- Mersen OT-1 fuse
- Generic Class K5 1A cartridge fuses of equivalent dimensions
- Previous generation Bussmann NON-1 stock
Works With
- Standard low-voltage electrical distribution panels
- Class K fuse holders and cartridge blocks
- UL and CSA listed panel assemblies
- Any system or equipment rated for Class K5 fuses at 250VAC/125VDC
