Under the same overcurrent load conditions, the action speed of a delay fuse is slower than that of a fast blown fuse. However, this is not that the reaction speed of a delay fuse is slow, but rather that the energy required for the fuse to fuse is greater. It can be said that it not only has the ability to react to overcurrent, but also has the ability to distinguish the category or energy size of overcurrent. Generally speaking, overcurrent can be divided into two categories: surge and fault. Surge overcurrent is mostly caused by charging and discharging during circuit switching or the influence of surrounding circuits. The peak value of the pulse is large and the duration is short, and the energy released is often not large. Delay fuses can withstand such overcurrent impacts without causing fusing action; However, fault overcurrent is continuous, and even if the peak value is not necessarily high, its energy will greatly exceed the surge overcurrent. Delay fuses will usually rea
NEC Thermal cutoff has the function of detecting abnormal temperature and cutting off the circuit. It can detect abnormal temperature rise of household or industrial electrical products and quickly cut off the circuit in a timely manner, achieving the function of preventing fires from igniting. NEC Thermal cutoff is a kind of element that provides very reliable protection under the condition of overtemperature. It has small size, large overcurrent, non reset, stable performance, convenient installation, and a certain range of humidity settings and bearing capacity for selection to meet customer application needs. The products are widely used in various motors, copiers, fax machines, HID ballasts, fluorescent lighting ballasts, transformers, chargers, battery packs, heating appliances, electric irons, hair dryers, electric stoves, rice cookers, electric kettles, coffee pots, ventilation fans, electric fans, sewing machines, water heaters, power converters, power plug sockets, refr
When bending the lead wire, it should be bent from the component at least 6 millimeters away from the root; When bending, it is not allowed to damage the roots and leads, and it is not allowed to forcefully pull, press, or twist the leads. 2. When the thermal fuse is fixed by screws, riveting, or wiring terminals, it should be able to prevent mechanical creep and the occurrence of poor contact. 3. The connecting components should be able to work reliably within the working range of the electrical product, without displacement due to vibration and impact. When conducting wire welding operations, the heating humidity should be limited to the minimum, and attention should be paid not to apply high temperatures to the thermal fuse; Do not forcefully pull, press, or twist the thermal fuse and leads; After welding, it should be immediately cooled for more than 30 seconds. 5. The thermal fuse can only be used under the specified rated voltage, current, and specified temperature condit
The self recovery fuse is composed of specially treated polymer resin and conductive particles (Carbon Black) distributed inside. Under normal operation, the polymer resin tightly binds conductive particles outside the crystalline structure, forming a chain like conductive electrical pathway. At this time, the recoverable fuse is in a low resistance state (a), and the heat generated by the current flowing through the self recovering fuse on the circuit is small and does not change the crystal structure. When a circuit experiences a short circuit or overload, the heat generated by the large current flowing through the self recovery fuse causes the polymer resin to melt, rapidly increase in volume, and form a high resistance state (b). The working current rapidly decreases, thereby limiting and protecting the circuit. After the fault is eliminated, PTC can restore the fuse to cool and crystallize again, shrink the volume, and the conductive particles form a conductive path again. The
According to size, it can be divided into Dimensions, 3.6X10, 3X10, 5X20, 6X30, 6X32, 6X25, 10 * 38, 2.4X7, 2.5X6, 3X8, 2.5X9, 8.5X8, 8.5X8X4, 3.5X10, 3.5X9 According to current, it can be divided into 32ma, 63ma, 100mA, 150mA, 200mA, 250mA, 300mA, 400mA, 500mA, 600mA, 800mA, 1A, 1.25A, 1.6A, 2A, 2.5A, 3A, 3.5A, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 12A, 15A, 20A, 25A, 30A According to material classification, it can be divided into Glass current fuse, ceramic current fuse
Rated voltage The nominal working voltage of a fuse, codenamed Un, is generally rated at 32V, 60V, 125V, 250V, 300V, 500V, 600V, and 1200V. Fuses can be used at a voltage not exceeding their rated voltage, but are generally not approved for use in circuits with a circuit voltage greater than the rated voltage of the fuse. Voltage drop When the rated current is applied to the fuse, the voltage measured at both ends of the fuse when the fuse reaches Thermal equilibrium, that is, when the temperature is stabilized, is Ud. Due to the voltage drop at both ends of the fuse having a certain impact on the circuit, there are clear provisions for voltage drop in European regulations. Fuse resistance Usually divided into cold resistance and hot resistance, cold resistance is the resistance value measured by a test current less than 10% of the rated current at a fuse temperature of 25 ℃. The thermal resistance is converted from the voltage drop measured at the full rated current value as
MB:+86 13924633629 Ms.vicky
E-mail: waimao@xcfuse.com
Factory :
XC Electronics(Shenzhen)Corp.,LTD
Add: Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
Shenzhen branch: Shenzhen Xucheng Electronic Commerce co.Ltd
Add: 8-15 Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
