黑色的 / 红色方形延时微型 DIP 安装微型保险丝

Black Red Square Type Slow Blow Radial Lead DIP Micro Fuses
Description Of Square Type Slow Blow Radial Lead Micro Fuses:
额定电压: 250V
材料: Base and Cap: Black thermoplastic, Pin: Tin-lead Plated alloy
证书 : 中性粒细胞、UL

AC Adapter Current：2.5 安培
品牌：Baomain
电压：250 伏特
材料：lead
规格：Met UL

About this item
产品名称 : 微型保险丝; 引线类型 : 径向
额定功率 : 250V, 2.5A (T2.5A); 分断能力 : 50A (250交流电压); Time-lag : 2.5A
机身尺寸 : 8 x 7 x 4mm/ 0.31″ x 0.27″ x 0.16″(L*W*T)
Leads Size : 0.5 x 19mm/ 0.2″ x 0.75″ (深*长)
重量 : 10克; Package Content : 20 x Micro Fuse

DIP Mounted Miniature Cylinder Slow Blow Micro Fuse 250V Red

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黑色的 / 红色方形延时微型 DIP 保险丝

① DIP Mounted Miniature Square can be divided into square type miniature fuse and cylindrical type miniature fuse according to shape, with sizes of 8*8*4mm, 8.5*8毫米, 8.5*8*4mm respectively; current range from 50mA-6.3A 125V/250V;;
Models include: AR5\AP5\AMF\AF\372\382\370\392\2000\2010\MEF\MET\MSF\MST, ETC.
② DIP Mounted Miniature Square can be divided into fast blow and slow blow according to fuse performance.
③ According to standards, it can be divided into American and European standards, and the certifications obtained are: UL\VDE\SEMKO\CUL\CCC\EK\PSE, ETC.

The influence of working environment temperature on fuse life:
Excessive ambient temperature will damage the life of the fuse. For time-delay (slow-blow) fuses such as tin ball type, tin begins to diffuse into the metal wire when the temperature is about 160℃ (150~170℃). The temperature at which the fusible element (metal wire) of the fast-blow fuse begins to oxidize more violently is about 200℃ (175~225℃). With the oxidation of the fuse from the outside to the inside, multiple diffusions, thermal stress fatigue, ETC。, the life of the fuse will gradually shorten. 所以, it is recommended that the time-delay fuse should not work for a long time above 150℃, and the fast-blow fuse should not work for a long time above 175~225℃.

The influence of pulse current on the life of the fuse:
Continuous pulse impact will produce thermal cycles, which will cause diffusion, oxidation, thermal stress, ETC. of the fuse, and even accelerate it. The fuse will gradually age with the increase of pulse energy and number of times. The impact resistance life of the fuse depends on the percentage of the pulse I2t to the fuse’s own I2t. 通常情况下, it should be less than 20[%], so that the fuse can withstand more than 100,000 影响.

Such as the pipe clamp in contact with the fuse, and the length and cross-sectional area of the connecting wire. The contact resistance between the fuse and the pipe clamp is large, which is detrimental to the life. The UL standard stipulates that the contact resistance between the fuse and the pipe clamp is less than 3mΩ during the test. When the contact resistance is large, the pipe clamp does not dissipate heat but generates heat and transmits it to the fuse.