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FNM-20
The FNM-20, a product from Eaton Cutler-Hammer’s Bussman series, serves as a low-voltage supplemental fuse. This fuse is rated for a maximum current of 20.0 A and designed to operate at 250 VAC. It features a breaking capacity of 10 kAIC at this voltage, ensuring effective protection against overloads and short circuits.
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Technical specifications for FNM-20
| Manufacturer | Eaton Cutler-Hammer |
|---|---|
| Product Type | Low-Voltage Supplemental Fuse |
| Product Line | Bussman |
| Part Number | FNM-20 |
| Current Rating | 20.0 A |
| Voltage Rating | 250 VAC |
| Breaking Rating at 250 Volts AC | 10 kAIC |
| Fuse Element Style | Dual-Element, Time-Delay |
| Endcap Material | Nickel-Plated Bronze |
| Indicating Type | Non-indicating |
| Color Code | Green |
| Connection Type | Ferrule End to Ferrule End |
| Mounting Style | Holder / Clip-in Mount |
| Speed Characteristic | Slow/Time-Delay |
| Primary Applications | Small motors, transformers, and inductive circuit protection |
The Eaton Cutler-Hammer FNM-20 is characterized as a low-voltage supplemental fuse. It is rated for a current of 20.0 A and operates at up to 250 VAC. The fuse's breaking rating is 10 kAIC at 250 volts AC, providing a robust defense against electrical faults. The design incorporates a dual-element, time-delay style to prevent nuisance tripping and allow for brief overload conditions.
For physical construction, the end cap is made from nickel-plated bronze, which adds to the component's longevity and resistance to corrosion. The FNM-20 does not feature an indicating mechanism and is identifiable by its green color code.
Connections are facilitated via ferrule ends, allowing for a straightforward installation process. It can be mounted using a holder or clip-in method, enhancing usability in various setups. The slow/time-delay speed characteristic is crucial for protecting inductive loads, such as small motors and transformers. This makes the FNM-20 well-suited for applications requiring reliable circuit protection while accommodating transient conditions.
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