SCHURTER's UMT-H series of universal modular fuses offer a 1500 A breaking capacity at rated voltages of 277 V_AC /250 V_DC. These compact, high-performance fuses now have VDE approval in addition to UL approval. They are time-lag fuses providing over-current and short-circuit protection in various industrial control applications, including intrinsically safe applications.

The "intrinsic safety" method is one of the most common techniques used for achieving safety protection with lower voltage or power equipment. This method restricts the available electrical and thermal energy in a system so that ignition of a hazardous atmosphere (such as explosive gas, dust, or electrical arcing) cannot occur. The UMT-H's high breaking capacity of 1500 A and greater than 10 mm spacing between end caps, combined with the ability to be impermeable to conformal coating, make the fuses suitable for use in such intrinsically safe applications.

The UMT-H fuses are available in a total of 21 rated currents between 160 mA and 10 A at voltages up to 277 V_AC and 250 V_DC. The UMT-H measure at 5.3 mm x 16 mm, which is a smaller alternative to the classic cylindrically shaped cartridge fuses measuring 5 mm x 20 mm. The smaller footprint saves valuable board space, allowing for further downsizing of equipment. With its square design, the UMT-H are also suited for more cost-effective, automated assembly. The high breaking capacity fuses meet the IEC 60127-7/1, UL 248-14 and CSA C22.2 standards along with its VDE and UL approvals. Additional applications include power supplies, electromobility, medical, and telecommunication applications, as well as 277 V_AC utility-connected equipment.