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URA_D-30WR2&URB_D-30WR2

2013.03.12-A/0

Page 3 of7

CS

IEC/EN61000-4-6

3 Vr.m.s

perf. CriteriaA

EMS

Voltage dips, short

and interruptions

immunity

IEC/EN61000-4-29

0%-70%

perf. CriteriaB

EMC RECOMMENDED CIRCUIT

Vin

G ND

+ Vo

- Vo

EUT

L O AD

C2

L CM

②

C0

TVS

L DM

M OV

FU SE

①

C1

C4

V in

G ND

C3

L O AD

0V

Vin

G ND

+Vo

0V

EUT

LO AD

C2

LCM

②

C0

TVS

LDM

MOV

FUSE

①

C1

C4

Vin

G ND

C3

URA_D-30WR2

URB_D-30WR2

(Figure 1)

Recommended external circuit parameters:

Model

URA24_D-30WR2 URB24_D-30WR2 URA48_D-30WR2 URB48_D-30WR2

FUSE

Choose according to practical input current

MOV

10D560K

10D101K

LDM

56

μH

TVS

SMCJ48A

SMCJ90A

C0

120

μF/50V

120

μF/100V

C1

4.7

μF /50V

2.2

μF /100V

LCM

2.2mH （FL2D-30-222）

C2

4.7

μF /50V

2.2

μF /100V

C3,C4

1nF/2KV

Note: 1. In Figure 1, part①is EMS Recommended external circuit, part②is EMI recommended external circuit. Choose according to requirements.

2. FL2D-30-222 is the EMC auxiliary component of our company.

EMC RECOMMENDED CIRCUIT PCB LAYOUT

(Figure 2)