Mersen OT60 One T Class K5 60A 250V Fast-acting Fuse

Product Description

The MERSEN OT60 ONE T is a Class K5 fast-acting, one-time ferrule fuse rated at 60 amperes, 250 volts AC and 250 volts DC. It is designed for general-purpose overcurrent protection in feeder and branch-circuit applications. The fuse provides a maximum interrupting rating of 50 kA, safely clearing available short-circuit currents across all standard ratings. It is not a rejection-style fuse, so installers must verify that any replacement maintains an equal or greater interrupting rating than the original device. Electricians install this fuse in clip-style fuse holders found in panels, disconnects, and fused safety switches.

The OT60 ONE T is suited for residential and light commercial feeder and branch-circuits serving lighting loads, heating equipment, and other non-motor electrical loads. It carries an AC/DC rating, making it usable in both alternating-current and direct-current circuits within its voltage limits. The fuse is compliant with RoHS requirements and operates at 50 and 60 Hz. For Canadian installations, OTN-series fuses in the 15-60 ampere range satisfy the Canadian Electrical Code requirement for Type P low melting-point, non-time-delay fuses.

Key Features

• 60A fast-acting operation provides immediate response to short-circuit conditions without intentional delay
• 50 kA AC maximum interrupting rating for reliable short-circuit protection on feeder and branch circuits
• Dual-rated 250 volts AC and 250 volts DC for flexible application in AC and DC systems
• Ferrule connection type with copper terminals for secure clip-mount installation
• Paper body construction suitable for general-purpose, non-motor load applications
• RoHS compliant for installations with environmental material restrictions

Compatibility

Designed as an OEM-style replacement for Class K5 fast-acting ferrule fuses in clip-style fuse holders rated for general-purpose feeder and branch-circuit protection.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. De-energize and lock out the circuit before removing or installing the fuse. This is a one-time fuse and must be replaced after any overcurrent event. Verify that the replacement fuse matches or exceeds the interrupting rating of the original to avoid creating a hazard on high available fault-current circuits.

Technical Specifications

• Fuse Class: Class K5
• Ampere Rating: 60 amps
• Rated Voltage AC (UL): 250 volts
• Rated Voltage DC (UL): 250 volts
• Speed / Characteristic: Fast-Acting
• AC Max Interrupting Rating: 50 kA
• AC or DC: AC/DC
• Frequency: 50/60 Hz
• Connection / Terminal Type: Ferrule
• Connection / Terminal Material: Copper
• Body / Insulating Material: Paper
• Mounting: Clip
• Length: 3 inches
• Weight: 0.073 pounds
• RoHS Compliant: Yes

Standard Information

• Brand: MERSEN
• Manufacturer Part Number: OT60 ONE T