Fuses & Accessories


A fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, interrupting the current.
As a global supplier of high quality electrical components, Powertech Controls is proud to offer the following Fuse lines:

Control circuit fuses have a variety of different voltage ratings. As the physical size of these fuses does not vary with voltage or interrupting rating, the most common cause of misapplication is due to improper voltage or interrupting rating selection. When a system fault occurs and an improperly sized fuse tries to interrupt an overcurrent event, there can be adverse consequences. This mistake can lead to compromised system integrity—impacting personnel and equipment safety.
To find the right control circuit or supplemental fuse Follow the following steps:
  • Select the fuse type. Select from time-delay fuses for inductive loads or fast-acting fuses for resistive loads.
  • Select the voltage rating required. The voltage rating must be equal to or greater than the circuit voltage for the proper application of an overcurrent protective device. The device can have a higher rating, but not a lower one; when an overcurrent protective device is applied beyond its rating, there may be potential for fire and arcing energy, posing a severe fire risk to other components in the panel. 
  • Verify that the interrupting rating of the selected fuse is sufficient for the circuit application. The interrupting rating must be equal to or greater than the available short-circuit current. An overcurrent protective device must be able to safely interrupt short-circuit currents to which the equipment can be subjected. If the fault current exceeds a level beyond the capacity of the protective device, the device may rupture, causing additional damage. Therefore, it is important to use a fuse that can sustain the largest potential short-circuit currents. Failure to apply fuses with the appropriate interrupting rating can be a serious safety hazard.
Powertech Controls is a distributor of high quality electrical and electronic automation controls and components to the global market. Powertech's friendly, knowledgeable staff is committed to providing attentive service, forming strategic partnerships with our customers and vendors, and continually improving our operations. If you need information that you cannot find, please send a request for quote or contact us.