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WRA_S-1WR2 & WRB_S-1WR2

2013.07.25-A/3

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ESD

IEC/EN61000-4-2

Contact

±4KV

perf. Criteria B

RS

IEC/EN61000-4-3

10V/m

perf. Criteria A

IEC/EN61000-4-4

±2KV (Recommended Circuit Refer to Figure1-①)

perf. Criteria B

EFT

IEC/EN61000-4-4

±4KV (Recommended Circuit Refer to Figure 3)

perf. Criteria B

Surge

IEC/EN61000-4-5

±2KV (Recommended Circuit Refer to Figure1-① or Figure 3)

perf. Criteria B

CS

IEC/EN61000-4-6

3 Vr.m.s

perf. Criteria A

EMS

Voltage dips, short and

interruptions immunity

IEC/EN61000-4-29

0%-70%

perf. Criteria B

EMC RECOMMENDED CIRCUIT

L D M2

②

C0

TVS

LD M1

MOV

FU SE

①

C1

+

Vin

G ND

+ Vo

-Vo

( 0V)

EUT

L O AD

C2

CY

C trl

Cd

D1

R

③

C trl

Vin

G ND

(Figure1)

Recommended external circuit param eters:

Model

Vin:5V

Vin:12V

Vin:24V

Vin:48V

FUSE

Slow blow ,choose according to practical input current

MOV

--

--

S14K35

S14K60

LDM1

--

--

56

μH

56

μH

TVS

SMCJ13A

SMCJ28A

SMCJ48A

SMCJ90A

C0

680

μF/16V

680

μF/25V

330

μF/50V

330

μF/100V

C1

4.7

μF/50V

4.7

μF/100V

LDM2

12

μH

C2

4.7

μF/50V

4.7

μF/100V

CY

1nF/2KV

D1

RB160M-60/1A

R

Follows:

300

-

0

.

1

-

-

C

D

C

I

V

V

R =

Cd

47nF/100V

Note:1. In Figure 1, part ① is the recommended external circuit for EMS , and part ② is for EMI .Choose according to requirements.

2. VC is between Ctrl and GND, VD is the forward conduction voltage drop of D1, IC is the current through Ctrl pin which is normally 5-10mA, the external circuit of

Ctrl is as shown in figure1-③.

3. If there is no recommended parameters, no external component is required.

EMC RECOMMENDED CIRCUIT PCB LAYOUT

DUAL

SINGLE

(Figure 2)

Note: The pad space between input and output GND (CY) must be

≥2mm.