Land sea SMD self recovery fuse 1206 chip parameters and scheme
Mobile power supply is generally composed of battery, control charge and discharge circuit and overcurrent protection elements. The previous charging and discharging circuit used IC for overcurrent protection, which is not only complex but also has a high failure rate, resulting in frequent after-sales problems and high maintenance costs. Therefore, the manufacturer designed a self-healing fuse in the circuit, which has few components, low failure rate, sensitive response, simple circuit and the lowest cost, to protect the overcurrent of mobile power supply, solving the above problems, So mobile power can be widely used.
Only one self-healing fuse PPTC element is needed to solve the above problems. Connect the self-healing fuse in series to the battery output power supply line. The resistance value of the self-healing fuse is very low when it works normally. When the internal or external charging and discharging generates a large current, the self-healing fuse suddenly changes from low resistance to high resistance, reducing or limiting the large current in the circuit to a safe range, so as to protect the whole system circuit in time, Avoid battery and peripheral equipment burnout. Self recovery fuse, also known as self reset overcurrent protector, also known as 10000 times fuse, also known as recoverable overcurrent protector or polymer self recovery fuse. When the power is off, the self recovery fuse returns to low resistance, and the charge and discharge circuit returns to the normal conductive path state. Whether the self-healing fuse of plug-in or the self-healing fuse of patch is selecte-d, the purpose of timely protection can be achieved.
The conventional package of SMD patch self recovery fuse is 04020603080512061210181220182920. Now take sea&land brand as an example to introduce the detailed models and specifications of common package 1206.
The 1206 package of Luhai brand is named nsmd, and its size is 3.2*1.6mm/0.12*0.06inch. Its holding current is from 0.05A to 2.5A, the maximum voltage is from 6V to 60V, and the maximum current is 100A. It can be used in the circuit environment from -40 ℃ to +85 ℃. The models of this series are:
nSMD005，nSMD010，nSMD012，nSMD020，nSMD020-30V，nSMD025，nSMD025-24V，nSMD025-30V，nSMD035，nSMD035-13.2V，nSMD035-16V，nSMD035-24V，nSMD050，nSMD050-13.2V，nSMD050-16V，nSMD050-24V，nSMD075，nSMD075-13.2V，nSMD075-16V，nSMD075-24V，nSMD100，nSMD100-13.2V，nSMD100-16V，nSMD110，nSMD110-13.2V，nSMD110-16V，nSMD150，nSMD150-13.2V，nSMD150-16V，nSMD200，nSMD250
Luhai nsmd1206 series meets ROHS environmental standards, is lead-free and halogen-free, and has passed UL certification. The packaging is reel packaging. The number of packages of nsmd020, nsmd020-30v, nsmd025, nsmd025-24v, nsmd025-30v, nsmd035, nsmd050, nsmd075, nsmd100, nsmd110 is 5000 per roll, and the others are 3500 per roll.
Proposal recommendation: JK self patch restoration fuse
