MR50-xxSRWSeries
Compact, 50W
Wide Input Railway
DC/DC Converter
Electrical Specifications
Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice.
Input
Parameter
Conditions
72 VDC Input 43.0
110 VDC Input 66.0 110.0 160.0
Min.
Typ.
72.0 101.0
Max.
Units
Key Features:
• 50W Output Power
• Meets EN 50155
• EN 60950 Approved
• EN 50121-3-2 Compliant
• Wide Input Range
• 3,000 VAC rms Isolation
• Reinforced Insulation
• 92% Efficiency
Input Voltage Range
VDC
72 VDC Input
110 VDC Input
72 VDC Input
110 VDC Input
43.0
66.0
Input Start Voltage
VDC
VDC
40.0
63.0
Under Voltage Shutdown
Input Filter
Output
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
PI () Filter
Conditions
Min.
Typ.
Max.
1.0
Units
%
%
VIN = Min to Max
IOUT = 0% to 100%
See Note 1
0.2
0.3
• Meets EN 61373
• Remote On/Off
%
Ripple & Noise (20 MHz)
Transient Response Time, See Note 2
Temperature Coefficient
Output Over Load Protection
Output Short Circuit
General
100
250
mV Pk-Pk
µS
%/°C
%IOUT
25% Load Change
0.02
Max.
3,000
See Note 3
Continuous (Hiccup Mode)
150
Parameter
Conditions
Min.
Typ.
Units
VAC rms
VDC
M
pF
Input/Output 3,000
Input/Output to Case 1,500
500 VDC 1,000
Isolation Voltage, Reinforced Insulation
Isolation Resistance
Isolation Capacitance
Switching Frequency
Environmental
Parameter
Operating Temperature Range
100 kHz/1V
320
kHz
Conditions
Min.
-40
7.5
6.1
5.3
3.9
6.8
4.1
3.3
2.2
-40
Typ.
+25
Max.
+75
Units
°C
Ambient, See Note 4
Natural Convection
100 LFM
Thermal Impedance, Without Heat Sink
°C/W
200 LFM
400 LFM
Natural Convection
100 LFM
Thermal Impedance, With Heat Sink
°C/W
200 LFM
400 LFM
Base Plate
Operating Temperature Range
Thermal Shutdown
Cooling
+105
°C
°C
Base Plate
+110
See Derating Curves (Page 3)
95
Humidity
RH, Non-condensing
%
Physical
Case Size
2.28 x 1.45 x 0.78 Inches (57.90 x 36.8 x 20.00 mm)
Black Anodized Aluminum Case with Aluminum Plate/Heat Sink
2.6 Oz (74.0g)
Case Material
Weight
MicroPower Direct
292 Page Street
Suite D
Stoughton, MA 02072
USA
Remote On/Off
Parameter
Conditions
Min.
Typ.
Max.
Units
Unit On
Unit Off
3.5 VDC - 12.0 VDC or Open Circuit
0 VDC - 1.2 VDC or Short Circuit
Control Input Current, ON
Control Input Current, OFF
Control Common
Standby Input Current
Reliability Specifications
Parameter
VCTRL = 5V
VCTRL = 0V
0.5
-0.5
mA
mA
Referenced to -VIN (Pin 3)
2.5
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mA
Conditions
MIL HDBK 217F, 25°C, Gnd Benign 314.9
Min.
Typ.
Typ.
Max.
Units
kHrs
MTBF
Absolute Maximum Ratings, See Note 5
Parameter
Conditions
Min.
Max.
165.0
250.0
260
Units
VDC
°C
77 VDC Input -0.7
110 VDC Input -0.7
1.5 mm From Case for 10 Sec
Input Voltage Surge (100 mS)
Lead Temperature
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