R1245T Series 4.5*12mm1245 4512 Timg-Lag SMD Fuse

SMD fuses is a new type with relatively high technology content in small fuse. SMD fuse can be divided into patch current fuses and PPTC Fuse.

SMD fuses be Classified by following:

（1）Products can be classified by size as：0402、0603、1206 2410 6125 1808 1025 1032  1245 1250 2050 3263

（2）Products can be classified by performance：Fast, Bow and enhanced melting heat energy

PPTC Fuse can be classified by size：0805 1210、0603、1206、1812、2018 2920, etc,  if you has high requirement for PPTC Fuse, 

SMD Fuse can be divided into disposable patch fuse and  PPTC fuse, The disposable fuse needs to be replaced after protection，PPTC can recover themselves and be reused after power failure。

There are four basic types of SMD Fuse：

  （1）Slow Blow / Timg-Lag;

  （2）Double alloy slow type;

  （3）Fast Acting;

  （4）Super Fast-Acting;

  Slow fuses are ideal for circuits with transient current surges or startup surges. These circuits include motors, transformers, incandescent lamps and suitable load devices.

  Fast Acting type respond quickly and are suitable for circuits without instantaneous current surges.

  Super Fast-Acting type usually have silver connections. These fuses are often used to protect semiconductor circuits because of their current-limiting ability.