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EMC Specifications

Parameter

Standard

Radiated Emissions

See Note 1

EN 55022

Class A

Conducted Emissions

See Note 1

EN 55022

Class A

ESD

EN 61000-4-2

Criteria B; ±4 kV Contact

RS

EN 61000-4-3

Criteria A; 10V/m

EFT

See Note 2

EN 61000-4-4

Criteria B; ±2 kV

Surge

See Note 3

EN 61000-4-5

Criteria B; ±2 kV

CS

EN 61000-4-6

Criteria A; 3 Vrms

Voltage Dips

EN 61000-4-29

Criteria B; 0% - 70%

Typical Connection

The diagram above illustrates a typical connection of the MB1500ERW

series for applications that require meeting EMC standards. The units do not

require external components to operate as specified. Some notes on this

diagram (starting with the input circuit) are:

1. It is recommended that an external fuse be used.The recommended fuse

is shown in the model chart on page 2.

2. An external MOV is recommended on the input to protect the unit in the

event of a surge. A recommended value is given in the table at right.

3. An external TVS is recommended on the input to protect the unit in the

event of a voltage spike. A recommended value is given in the table at

right.

electrolytic capacitor. Care must be taken in choosing this capacitor not

to exceed the capacitive load specification for the unit. The board layout

illustration below shows a connection for dual output units.Voltage derating

of capacitors should be 80% or above.

Notes:

1. All units are rated for EN 55022 (CE/RE) class A without external components.

They will meet class B with the addition of the DCFM-0x (or a similar discrete

filter circuit). Contact the factory for more information.

2. To meet the requirements of EN 61000-4-4 (±2 kV), external components are

needed. This can be done discretely, or with the addition of the DCFM-0x.

Contact the factory for more information.

3. To meet the requirements of EN 61000-4-5 (±2 kV), external components are

needed.This can be done discretely,or with the addition of the DCFM-0x.Contact

the factory for more information.

5. Recommended values for components are:

Component

MOV

10D560

10D101

56 µH

56 µH

TVS

SMCJ28A

SMCJ48A

SMCJ90A

680 µF/25V

120 µF/25V

120 µF/100V

1.0 µF/50V

1.0 µF/50V

1.0 µF/100V

4.7 µH

4.7 µH

4.7 µH

1,000 pF/2 kV

1,000 pF/2 kV

1,000 pF/2 kV

6. Input noise and surge suppression modules are available for

a number of MPD DC/DC power supplies. An MB1500ERW

connection with the DCFM-03 (surge suppression) module

connected to the input and the DCFM-03 EMS module.

Vin

(VDC)

Input

Capacitor

Vout

(VDC)

Output

Capacitor

12

100 µF

3.3

470 µF

5

470 µF

24

100 µF

12

220 µF

15

220 µF

48

100 µF

24

100 µF

±5

±220 µF

±12

±100 µF

±15

±100 µF

±24

±47 µF

For pricing or full technical information on these modules (DCFM-01,

DCFM-02 and DCFM-03) please contact the factory.

7. In many applications simply

adding input/output capaci-

tors will enhance the input

surge protection and reduce

output ripple sufficiently. The

in the typical connection dia-

gram above, and board layout

drawing below illustrate their

connection in this case, recommended capacitor

values are given in the table at right.