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Mersen OT1 Amp-Trap Class K5 Fast-Acting Fuse, 250V 1A
The Mersen OT1 is a 250V, 1A fast-acting Class K5 fuse from the Amp-Trap OT Series, built for reliable overcurrent protection in feeders, resistive heating circuits, and branch circuits. Rated for a 50 kA AC breaking capacity and self-certified for DC use per UL248, this OT1 fuse pairs a compact 2 in length with an easy-to-read imprint label for quick recognition and replacement, delivering high protection value at low cost for residential and small commercial installations.
Key Features
- Trade Size: 2 in length by 0.56 in diameter for standard fuse clip mounting.
- Durable Construction: Paper body insulating material provides reliable dielectric protection within the fuse body.
- Terminal Connection: Ferrule-style copper connection terminals for secure, low-resistance contact in fuse clips.
- Mounting Method: Clip-mounted for straightforward installation and replacement in standard fuse holders.
- Electrical Rating: 250V AC/DC rated, 1A fast-acting Class K5 fuse with a 50 kA AC maximum breaking capacity.
- Easy Identification: Easy-to-read imprint label speeds up recognition and replacement in the field.
- Value: Low-cost design delivers high protection value for feeders, resistive heating, and branch circuit applications.
Certifications & Compliance
- UL Listed to Standard 248-9, File E2137
- CSA Certified to Standard C22.2 No. 248.9
- Self-certified for DC per UL248
Technical Specifications
- AC Max Breaking Capacity: 50 kA
- Amperage Rating: 1A
- Body Insulating Material: Paper
- Connection Terminal Material: Copper
- Connection Terminal Type: Ferrule
- Mounting Method: Clip
- Product Diameter: 0.56 in
- Product Length: 2 in
- Product Weight: 0.04 lb
- Rated Voltage AC (UL): 250 V
- Rated Voltage DC (UL): 250 V
- Sell Pack Quantity: 10 Each
Typical Applications
- Feeders
- Resistive Heating Circuits
- Branch Circuits
- Residential and Small Commercial Installations
- Overcurrent Protection for Electrical Panels
Why Mersen?
Mersen's OT1 Amp-Trap fuse combines UL Listed and CSA Certified performance with a paper-insulated body, copper ferrule terminals, and a 50 kA AC breaking capacity for dependable, code-compliant overcurrent protection. The easy-to-read imprint label and clip-mount design make identification and replacement fast for professionals working on feeders, branch circuits, and resistive heating applications.
Manufacturer Resources
Spec Sheet
Product Specs
- Ac Max I R Breaking Capacity I1:
- 50 kA
- Ampere Rating:
- 1 A
- Body Insulating Material:
- Paper
- Connection Terminal Material:
- Copper
- Connection Terminal Type:
- Ferrule
- Fuse Class:
- Class K5
- Mounting Method:
- Clip
- Product Diameter:
- 0.56 in
- Product Length:
- 2 in
- Product Weight:
- 0.04 lb
- Rated Voltage Ac Ul:
- 250 V
- Rated Voltage Dc Ul:
- 250 V
- Sell Pack Height:
- 1.19 in
- Sell Pack Length:
- 3 in
- Sell Pack Quantity:
- 10 Each
- Sell Pack Weight:
- 0.42 lb
- Sell Pack Width:
- 2.06 in
- Speed Characteristic:
- Fast-Acting
- Department:
- Electrical
- Product Group:
- Wiring Devices
- Product Type:
- Fuse