The Protecion Circuit of RS-485_ZunYi ZCOREVV Semiconductor Technology Co.,Ltd.

Application

The Protecion Circuit of RS-485

图片9.png

Solution 1

图片10.png

Solution 2

Solution 1：

Test standard:

(1)IEC 61000-4-2: ±8KV(contact)，±15KV(air)

(2)ITU-TK.21:10/700us, 6KV/40Ω ±5 times, interval time：60S

Solutions：

Marketing Code	Part Number	Description
PPTC	ZP250-120	IH:0.12A@25℃ 0.049A@85℃,IT:0.24A,Umax:265V,Imax:1.2A,DIP
GDT	3RL090M-5S	DC spark-over Voltage:90V±20%，Maximum Impulse spark-over Voltage:600V，IPPM：5KA，Package: SMD 5*7.6mm
TVS1～TVS3	SMCJ15CA	VRWM：15V，VBR：16.7V~18.5V，VC：24.4V@61.5A，PPPM：1500W，Package: SMC

Solution 2：

Test standard:IEC 61000-4-2: ±8KV(contact)，±15KV(air)

Solutions：

Marketing Code

Part Number

Description

PPTC

ZP250-120

IH:0.12A@25℃ 0.049A@85℃,IT:0.24A,Umax:265V,Imax:1.2A,DIP

ESD

SP5PT23C712P02

VRWM：7V/12V，VBR(min)：7.5V/13.3V，IPPM：38A/21A;

VC：19V@38A,26V@21A,Ctyp=35pF(Pin1/Pin to Pin3)/57pF (Pin3 to Pin1/Pin2);

VESD：±30KV,Package: SOT-23;

ZP250-120
Holding current:0.12A;Rated voltage:250V;DIP overcurrent protection device;
3RL090M-5S
Size: 5.5mm*6.0mm;DC Spark-over Voltage:90V;Surge capacity is up to 5KA;Lower capacitance;Faster response time;
SP5PT23C712P02
Power:500W to 700W; Package: SOT-23; Breakdown voltage: 7/12V; ns-level response speed; Lower clamping voltage;
SMCJ Series
Power:1500W；Package: SMC；Faster response time；Lower clamping voltage.