50-75-100QBR_3 Series
50W/75W/100W - Single Output DC-DC Converter - Wide Input - Isolated & Regulated
DC-DC Converter 50W / 75W / 100W
The 50-75-100QBR_3 series is a high performance product designed for the field of
railway applications. Output power contains 50W/75W/100W, no min. load
requirement, wide input voltage 66-160VDC, which allows the base plate tempe-
rature up to 100°C.
Wide range of input voltage:
66-160V
Efficiency up to 92%
Low no-load power
Isolation voltage 3000VDC
Operating temperature range:
-40°C ~ +100°C
Input under-voltage protection,
output over-voltage, over-
current, over-temperature
protection
International standard:
1/4 brick
Further product features include input under-voltage protection, output over-
voltage protection, short circuit protection, over temperature protection, remote
control and compensated, output voltage regulation functions.
Short circuit protection (SCP)
Meets requirements of
UL60950 and railway
standard EN50155
Meets the EN50155 railway standard and UL/EN60950 safety standards.
Widely used in the railway system and associated equipment.
Common specifications
Short circuit protection:
Temperature rise at full load:
Cooling:
Input specifications
Continuous
Item
Test condition
Min
-0.7
Typ
Max
Units
25°C TYP
Input current
(No load/full load)
Nominal input
• 50QBR_24S3
• 75QBR_24S3
• 100QBR_24S3
mA
mA
mA
5/988
5/741
5/494
Natural convection or forced convec-
tion
Operation temperature range:
Over-temperature Protection:
Thermal resistance:
-40°C ~ +100°C
Surge voltage
(1sec max)
180
66
VDC
mA
Base-Plate Temperature 115°C MAX
Reflected ripple
current
Nominal input
50
• xxxQBR_110S3:
- Natural convection 10.7°C/W MIN
- 200LFM convection 6.0°C/W MIN
- 400LFM convection 5.0°C/W MIN
- 1000LFM convection 4.0°C/W MIN
• xxxQBR_110S3H:
Start-up Threshold
Voltage
VDC
VDC
mS
Under-voltage
Shutdown Voltage
55
25
- Natural convection 5.1°C/W MIN
- 200LFM convection 2.8°C/W MIN
- 400LFM convection 2.2°C/W MIN
- 1000LFM convection 1.8°C/W MIN
Start-up Time
Filter
PI filter
Ctrl*
• Module switch
on
• Module switch
off
• Input current
when switched
off
• Ctrl psuspended or connected to
TTL high level (3.5-12VDC)
• Ctrl connected to -Vin or low level
(0-1.2VDC)
Storage temperature range:
Lead temperature:
-55°C ~ +125°C
300°C MAX, 1.5mm from case for 10 sec
Non-condensing < 95%RH
Storage humidity range:
Casing material:
• 2mA (TYP)
Black flame-retardant and heat-
resistant plastic (UL94-V0)
* The voltage of ctrl pin is relative to input pin - Vin.
Switching frequency:
MTBF:
PFM mode
220KHz TYP
MIL-HDBK-217F @ 25°C
500 Khours MIN
Isolation specifications
Item
Test condition
Min
Typ
Max
Units
Weight:
46g (no keatsink)
76g (with heatsink)
Insulation voltage
Input-output, with the
test time of 1 minute
and the leak current
less than 1mA
Cooling test:
EN60068-2-1
EN60068-2-2
EN60068-2-30
IEC/EN61373
Dry heat:
• Input-output
3000
1500
1500
VDC
VDC
VDC
• Input-case
• Output-case
Damp heat:
Shock and vibration test:
Insulation resistance
Test at 500VDC
1000
MΩ
pF
Isolation Capacitance Input/output,
100KHz/0.1V
2200
Example:
50QBR_110S3
50 = 50 Watt; QBR = Quarter Brick; 110 = Nominal Output Voltage;
S = Single Output; 3 = 3000 VDC Insulation
Page 1 of 6
50-75-100QBR75_3 – Rev. 2017-1.5
Specifications subject to change without notice.
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com
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