The Application of Self Recovery Fuses in RS485 Interface
As is well known, the interface of intelligent instruments was originally RS232, which can achieve point-to-point communication, but this method cannot achieve networking function. The subsequent RS485 resolved this issue. So the current RS485 interface is quite popular among intelligent instruments. Today, the editor will explain the application of Self Recovery Fuses in the RS485 interface.
RS485 has the advantages of long communication distance (over 1200m), high transmission rate (10Mbps), high signal-to-noise ratio, convenient control, low cost, and the ability to achieve multiple nodes on a single bus, as well as a variety of transceivers that can be used. It has been increasingly recognized by users.
However, with the increase in usage frequency, the problems encountered by RS485 become more apparent. Due to its low voltage (only 5V), when using intelligent instruments with RS485 interfaces, the withstand voltage of the components themselves is also low, resulting in instant damage to the RS485 interface when some large voltage passes through, leading to serious damage to the communication system. Therefore, for the protection of the RS485 interface, the self recovery fuse is a cost-effective option.
For the circuit protection designed for the RS485 interface, overcurrent protection, and voltage protection are generally selected. The use of positive temperature coefficient thermistor devices is a cost-effective protection solution.
In the event of a short circuit in the circuit, a positive temperature coefficient thermistor device can quickly transition from a low resistance state to a high resistance state, thereby limiting current and protecting the RS485 interface and equipment. For overvoltage protection, we can use TVS tubes (silicon based ESD protection devices). TVS tubes have low clamping voltage, high ESD resistance energy, and small packaging size, making them an ideal choice for RS485 interface electrostatic protection and overvoltage protection.
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Explanation of Parameters in the PPTC Specification for Self Healing Fuses
This is very simple. As long as you know the meaning represented by the parameters in the specification book, you can clearly and quickly view the PTC specification book for self recovery fuses.
Self Recovery Performance and Working Process of Self Recovery Fuses
Traditional fuses are installed in circuits. When an overcurrent occurs due to a fault or abnormality in the circuit, the fuse itself melts to cut off the current and protect the circuit. However, due to the fact that traditional fuses can only protect once and need to be replaced if burned out, some products still cannot resume operation after troubleshooting or abnormal overcurrent disappears. As a new type of overcurrent protection device, the self-recovery fuse has the function of automatic recovery, which can meet the performance requirements of similar applications.
Principle and Characteristics of Self Recovering Fuses
As a new type of overcurrent protection component, self recovering fuses have the advantages of self recovery, fast response speed, and small size, and have broad application prospects in electronic devices and circuits.
The Selection of Miniature Fuses
Miniature fuses are primarily used in digital cameras, laptops, mobile phones, and other electronic products. From traditional glass tube fuses to miniature fuses, the selection focus varies slightly due to differences in product technology. The selection of miniature fuses involves the following elements.
Application of Overcurrent Protection for Self Recovery Fuses
The overcurrent protection application of self recovery fuses - There are two optional types of self recovery fuse materials: radial lead packaging and surface mount. The function of self restoring fuses is suitable for various design applications.
Self Healing Fuses, a New Type of Overcurrent Protection Component
Self recovery fuse is a new type of overcurrent protection component with unique performance and wide application prospects.
The Application of Self Recovery Fuses in the Horn System
The protection requirements for the horn system are relatively strict. Ordinary fuses only provide one-time protection in the horn, increasing the repair rate of the product； In addition, additional fuse boxes and wires increase the manufacturer‘s costs.
Experience in Selecting Self Recovering Fuses
Do you have any good experience to share in selecting self recovering fuses? Self recovery fuse is an overcurrent electronic protection component, which is made of high molecular weight organic polymers under high voltage, high temperature, and sulfurization reaction conditions, mixed with conductive particle materials, and processed through special processes.
Selection Guide of Self Recovery Fuse
Self recovery fuses are widely used for overcurrent protection of power lines, communication lines, and I/O ports in electronic products such as communication, security, industrial, automotive, and consumer products. So, in actual circuit protection, how should we choose the appropriate model of self recovery fuse to achieve the best protection effect?
The Difference between Self Recovery Fuse and Blown Fuse
What is the difference between a self restoring fuse and a blown fuse? It is inevitable to have a clear understanding of the functions, parameters, and differences between them. So, let‘s experience the charm of self recovery fuses and blown fuses.
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Self Recovery Fuse Specification, Must Understand
Each type of circuit protection component has specifications, and self recovery fuses are no exception. So, what do you think when holding a self-healing fuse specification book? To put it bluntly, when reading the specifications, the main focus is on the parameters and the meanings they represent.
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