ENVIRONMENTAL

Parameter

Condition

Value

Operating Temperature Range

refer to derating graphs

-40°C to +93.5°C

Maximum Baseplate Temperature

+100°C

Temperature Coefficient

0.007%/°C

Thermal Impedance

refer to Rth tables

Operating Altitude

5000m

Operating Humidity

5%-95% RH

Pollution Degree (PD)

PD2

Fire protection on railway vehicles

refer to page 8

according to EN45545-2 standard

MTBF

according to Telcordia SR332 Issue 2 Method I standard, 25°C

continued on next page

PB-6

REV.: 0/2017

www.recom-power.com

DC/DC Converter

RPA200H-RUW

Series

-40 -20

0

0

20

20

40

40

50

60

64

60

80

80

100

100

120

120

Ambient Temperature [°C]

without PCB, fitted Heat-sink:

Natural Convection (0.1m/s)

with PCB and Heat-sink:

Natural Convection (0.1m/s)

0.2m/s

0.5m/s

0.8m/s

1.0m/s

1.5m/s

62.5

20

6.4

3.2

50.8

Ø

Ø

Thermal Impedance

airflow

[m/s]

Rth

[°C/W]

0.1

3.3

0.2

2.62

0.5

2.0

0.8

1.57

1.0

1.22

1.5

0.75

Iout = 50%

R

P

T

Thermal Calculation

T

AMBmax

= T

= 100°C - 36°C = +

64°C

T

OVER

Notes:

Note8: For further Heat-sink details please contact our Tech Support Team

techsupportAT@recom-power.com

Notes:

Note7: Following calculations are made with RPA200H-11012SRUW/P.

Used Test PCB: 160x100mm 105µm (Eurocard), double layer

Thermal Derating with Fan Cooling, Double Layer PCB and Heat-sink

Dimension Drawing Heat-sink (mm)