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VRA_YMD-6WR2 & VRB_YMD-6WR2

2013.12.02-B/0

Page 3 of 7

EMC SPECIFICATIONS

EMI

CE

CISPR22/EN55022

CLASSA（Without External Circuit）/ CLASSB（External Circuit Refer to Figure1-② or Figure3）

RE

CISPR22/EN55022

CLASSA（Without External Circuit）/ CLASSB（External Circuit Refer to Figure1-② or Figure3）

EMS

ESD

IEC/EN61000-4-2

Contact

±4KV

perf. CriteriaB

RS

IEC/EN61000-4-3

10V/m

perf. CriteriaA

EFT

IEC/EN61000-4-4

±2KV

perf. CriteriaB（External Circuit Refer to Figure1-①）

IEC/EN61000-4-4

±4KV

perf. CriteriaB（External Circuit Refer to Figure3）

Surge

IEC/EN61000-4-5

±2KV

perf. CriteriaB（External Circuit Refer to Figure1-①or Figure3）

CS

IEC/EN61000-4-6

3 Vr.m.s

perf. Criteria A

Voltage dips, short

and interruptions

immunity

IEC/EN61000-4-29

0%-70%

perf. CriteriaB

EMC RECOMMENDED CIRCUIT

LDM2

②

C0

TVS

LDM1

MOV

FUSE

①

C1

V in

GND

+

Vin

GND

+Vo

-Vo

(0V)

EUT

LOAD

CY2

CY1

(Figure1)

Recommended external circuit parameters:

Model

Vin: 12V

Vin: 24V

Vin: 48V

FUSE

Choose according to actual input current

MOV

--

S14K35

S14K60

LDM1

--

56

μH

TVS

SMCJ28A

SMCJ48A

SMCJ90A

C0

680

μF/25V

330

μF/50V

330

μF/100V

C1

1

μF/50V

1

μF/100V

LDM2

4.7

μH

CY1

1nF/2KV

CY2

1nF/2KV

Note: In Figure 1,part①is EMS recommended external circuit, part② is EMI recommended external circuit. Choose according to requirements.

EMC RECOMMENDED CIRCUIT PCB LAYOUT

DUAL

SINGLE

Note: The pad space between input and output (CY1/CY2) must

≥2mm.

(Figure 2)