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WRA_S-3WR2 & WRB_S-3WR2

2013.07.22-A/3

Page 3 of 7

Storage Temperature

-55

--

125

Temp. rise at full load

Ta=25

°C

--

25

--

Lead Temperature

1.5mm from case for 10 seconds

--

--

300

Cooling

Free air convection

EMC SPECIFICATIONS

CE

CISPR22/EN55022

CLASS B（Recommended Circuit Refer to Figure1-② or Figure 3）

EMI

RE

CISPR22/EN55022

CLASS B（Recommended Circuit Refer to Figure1-② or Figure 3）

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 DM2

②

C0

TVS

L DM1

MOV

FU SE

①

C1

+

Vin

GND

+Vo

-Vo

(0 V)

EUT

L OAD

C2

CY

Ctrl

Cd

D1

R

③

C trl

Vin

GND

(Figure1)

Recommended external circuit parameters:

Model

Vin：5V

Vin:12V

Vin:24V

Vin:48V

FUSE

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 EMS recommended external circuit, part ② is EMI recommended external circuit. Choose according to requirements;

of Ctrl is as shown in figure1-

;

③

3. If there is no recommended parameters, the model no require the external component.

EMC RECOMMENDED CIRCUIT PCB LAYOUT

DUAL

SINGLE

(Figure 2)

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

≥2mm.