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WRA_P-3WR2 & WRB_P-3WR2

2013.07.25-A/3

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EMC SPECIFICATIONS

CE

CISPR22/EN55022 CLASS A(Without External Circuit)/

CLASS B（Recommended Circuit Refer to Figure1-

or Figure 3

②

）

EMI

RE

CISPR22/EN55022 CLASS A(Without External Circuit)/

CLASS B(Recommended Circuit Refer to Figure1-

or Figure 3

②

)

ESD

IEC/EN61000-4-2

Contact

±4KV/ Air ±8KV

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

V in

G ND

+ Vo

- Vo

( 0 V)

E UT

L O AD

C2

L D M2

②

C0

TVS

L D M1

MOV

FU SE

①

C1

C3

V in

G ND

+

(Figure1)

Recommended external circuit param eters:

Model

Vin:5V

Vin:12V

Vin:24V

Vin:48V

FUSE

Choose according to practical input current

MOV

--

--

S14K35

S14K60

LDM1

--

--

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

C3

1nF/2KV

Note: 1.In Figure 1, part① is EMS Recommended external circuit, part② is EMI recommended external circuit. Choose according to requirements;

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

EMC RECOMMENDED CIRCUIT PCB LAYOUT

DUAL

SINGLE

(Figure 2)

Note: The space between input and output GND (C3) must

≥2mm.