ESD for the port protection of RS-485

RS-485 PROT

1. SM712

Compliance :

IEC 61000-4-2 Level 4 (ESD) -- 8kV / 15kV

IEC 61000-4-4 (EFT) -- 40A (5/50ηs)

IEC 61000-4-5 (Lighting) -- 18A (8/20μs)

IEC 61000-4-5 (Lighting) -- 4kV (10/700μs)

RS-485 port accurate working voltage is ±7V~±12V. SM712 is the best choice for RS-485.

Leiditech SM712 has strong surge protection ability,18A (8/20μs). One SM712 can be used as two diodes in two road,

2. SD15C, OR SD12C

Compliance :

IEC 61000-4-2 Level 4 (ESD) -- 8kV / 15kV

IEC 61000-4-4 (EFT) -- 40A (5/50ηs)

IEC 61000-4-5 (Lighting) -- 18A (8/20μs)

Customers have different requests. Such as they buy one ESD device but hope it can be used in both RS-485 and RS-232.Using diode is easy for the design of PCBA.

SD12C and SD15C can be used both RS-485 or RS-232.

3. SDA1211CDN

DFN1006DN

Compliance :

IEC61000-4-2 (ESD) ±30kV (air), ±30kV (contact) : 3.3V ~ 15V

IEC61000-4-2 (ESD) ±25kV (air), ±15kV (contact) : 18V ~ 36V

IEC61000-4-4 (EFT) 40A (5/50ηs)

IEC 61000-4-5 (Lighting) -- 7A (8/20μs)

SDA1211CDN has small size, the same size as 0402, but the power is up to 250W. It also has surge protection ability. Anti-static capability can up to 30KV.

Leiditech, Intentions for the customer service. We produce ESD with all models and good quality.