As a typical serial differential communication method, RS-485 networking communication interface is widely used in instrumentation, industrial control, mechatronics products, multimedia networks and other fields. However, in actual operation, RS-485 communication transmission lines are often exposed to outdoor environments and are susceptible to lightning surge overvoltage or electrostatic electromagnetic interference.
Since the operating voltage of RS-485 transceiver is low (only 5V) and the withstand voltage range is limited (between -7V and +12V), lightning overvoltage may instantly damage the transceiver and cause communication system failure; electrostatic electromagnetic interference will also have a significant impact on the data transmission of the communication bus.
RS485 protection circuit diagram
Semicon Champoin's CSH712E2B electrostatic ESD protection device is packaged in SOT-23, has a power of 350W, has the characteristics of 7V and 12V asymmetric voltage, the maximum flow rate Ipp can reach 17A, and the capacitance is about 55PF. CSH712E2B has excellent electrostatic protection function, whether it is air discharge or contact discharge, it can achieve ±30KV electrostatic protection.
The rated parameters of CSH712E2B are as follows:
Peak pulse power (tp=8/20μs)@25℃：350W
ESD (IEC61000-4-2 air discharge)@25℃：±30KV
ESD (IEC61000-4-2 contact discharge)@25℃：±30KV
Peak pulse current (tp=8/20μs)@25℃：17A（max.）
Clamping Voltage：26V@17A
What is the warranty period for the CSH712E2B?
We offer a 1-year warranty for the . This warranty covers any material and workmanship defects under normal usage. If a defect is found within the warranty period, we will repair or replace the product at no charge. For more details, please refer to our
How does Chipmall.com ensure the quality reliability of the Analog Devices, Inc CSH712E2B?
Chipmall.com has a professional procurement team that rigorously tests and verifies the sources of our products. All suppliers must pass a qualification review before their products can be listed on our platform. We emphasize sourcing only from reliable channels and authorized distributors to ensure product quality standards.
Product Details: Chipmall CSH712E2B
