1 RS422 Port Protection Solution Use surface mount component HUAAN LIMITED ▼Solution1(RS422): Transmission requency:10MHZ Surge level: IEC61000-4-5 10/700us: 6KV/150A 1.2/50us-8/20us: 6KV-3KA Specification................................................................................................................................................................................ Part Number DC Spark-over Voltage @ 100V/S Impulse Spark-over Voltage Impulse Spark-over Voltage @100V/μs @1KV/μs Insulation Resistance Impulse discharge AC discharge current(8/20μs) current (50Hz,1s,10time s) GDT V V V GΩ 10 Times A H3R5-90SMD 90±20% <500 <600 >1 5KA 5 Vmax I max Ih Rmax V A A JK-mSMD014 60 100 0.14 Part Number Vbr Ir Vrwm Ipp 10/1000us Vc TVS V uA V A V SMBJ6.0CA 6.67-7.37 800 6 58.3 10.3 Part Number PTC Rmin Pd Ω Ω w 6 0.65 0.8 Package SMB Part Number VDRM @IDRM =5μA VS @100V/ IH IS V min V max mA min mA max 6 25 50 800 IT VT Capacitance impulse @IT=2.2Am @1MHz,2V withstand ps bias voltage A max Vmax pF 10/700us 2.2 4 70 4KV μs Package SIDACTor P008B SMB Application product(RS422 Port ..ETC): HUAAN LIMITED ▼Solution 2(RS422): 2 RS422 Port Protection Solution Use DIP component Transmission requency:10MHZ Surge level: IEC61000-4-5 10/700us:6KV/150A 1.2/50us-8/20us: 6KV-3KA Specification................................................................................................................................................................................ Part Number DC Spark-over Voltage @ 100V/S Impulse Spark-over Voltage Impulse Spark-over Voltage @100V/μs @1KV/μs Insulation Resistance Impulse discharge AC discharge current(8/20μs) current (50Hz,1s,10times) GDT V V V GΩ 10 Times A H3R6-90 90±20% <500 <600 >1 5KA 5 Vmax I max Ih V A A 250 10 0.12 Part Number PTC JK250120U Rmax Rmin Pd Ω Ω w 11 6 0.8 Part Number Vbr Ir Vrwm Ipp 10/1000us Vc TVS V uA V A V P6KE6.8CA 6.45-7.14 1000 5.8 58.1 10.5 Package DO-15 Application product(RS422 Port....etc ): A friendly reminder: Any surface mount component and DIP component can alternative use, ( For example: H3R5-90SMD= H3R6-90 , JK250120U = JK-mSMD014 , P6KE6.8CA = SMBJ6.0CA) (So You can also use: H3R6-90 + JK250120U + SMBJ6.0CA, H3R5-90SMD+ JK250120U+ P6KE6.8CA ...ETC) Statement: These solution is only for reference, The final solution will be based on the actual test results, HUAAN LIMITED will have the right of final explanation. [email protected] [email protected] www.huaandz.com Tel:+86-755-27465585 2 HUAAN LIMITED