66 - 132 Watt DC-DC Converters
Q Series
Features
• RoHS lead-free-solder and lead-solder-exempted products
are available
• 5 year warranty for RoHS compliant products with an
extended temperature range
• Class I equipment
• Compliant with EN 45545 (version V106 or later)
• Wide input voltage ranges up to 154 VDC
• 1 or 2 isolated outputs from 3.3 to 24 V
• Flexible output power
•
Extremely high efficiency of up to 90%
• Excellent surge and transient protection
• Outputs open and short-circuit proof
• Redundant operation, current sharing
• Extremely low inrush current, hot-swappable
• Externally adjustable output voltage and inhibit
• Electric strength test 2.1 kVDC
• Extremely slim case (4 TE, 20 mm), fully enclosed
111
4.4"
3U
20
0.8"
4 TE
164
6.5"
1
Safety-approved to the latest edition of IEC/EN 60950-1
and UL/CSA 60950-1
1
on request
Table of Contents
Description........................................................................................2
Model Selection ................................................................................2
Functional Description ......................................................................6
Electrical Input Data .........................................................................7
Electrical Output Data.......................................................................9
Auxiliary Functions .........................................................................18
Electromagnetic Compatibility (EMC) .............................................22
Immunity to Environmental Conditions ...........................................24
Mechanical Data .............................................................................26
Safety and Installation Instructions .................................................27
Description of Options ....................................................................29
Accessories ....................................................................................31
belfuse.com/power-solutions
BCD20011 Rev AL1, 08-Aug-2018
Q Series
Description
66 - 132 W DC-DC Converters
These extremely compact DC-DC converters incorporate all necessary input and output filters, signaling and protection features,
which are required in the majority of applications. The converters provide important advantages such as flexible output power
through primary current limitation, high efficiency, excellent reliability, very low ripple and RFI noise levels, full input to output
isolation, negligible inrush current, overtemperature protection, and input over-/undervoltage lockout.
The converter inputs are protected against surges and transients occurring on the source lines.
The converters are particularly suitable for rugged environment, such as railway applications. They have been designed in
accordance with the European railway standards EN 50155 and EN 50121-3-2. All printed circuit boards are coated with a
protective lacquer.
The outputs are continuously open- and short-circuit proof. An isolated output Power Good signal and LEDs at the front panel
indicate the status of the converter. Test sockets at the front panel allow for a check of the main output voltage.
Full system flexibility and n+1 redundant operating mode are possible due to virtually unrestricted series or parallel connection
capabilities of all outputs. In parallel connection of several converters, automatic current sharing is provided by a single-wire
interconnection.
As a modular power supply or as part of a distributed power supply system, the extremely low-profile design reduces the necessary
power supply volume without sacrificing high reliability. A temperature sensor disables the outputs when the case temperature
exceeds the limit. The outputs are automatically re-enabled, when the temperature drops.
The fully enclosed, black-coated aluminum case acts as a heat sink and an RFI shield. The converters are designed for 19" DIN-
rack systems occupying 3 U/4 TE only, but can also be chassis-mounted by four screws. Fitting an additional heat sink or ordering
options with fitted heat sink is possible as well.
Model Selection
Table 1a: Model Selection BQ, GQ
Output 1
V
o nom
[VDC]
3.3
5.1
12
3
15
3
Output 2
I
o max
[A]
25
20
10
8
5.5
8.5
5
4
2.75
V
o nom
[VDC]
-
-
-
-
-
5.1
4
12
4
Output power
1
T
A
= 71°C
T
A
= 50°C
P
o max
[W]
82
102
120
120
132
97
120
120
132
I
o max
[A]
-
-
-
-
-
8.5
5
4
2.75
P
o nom
[W]
66
82
96
99
106
77
96
99
106
Operating input voltage range, efficiency
V
i min
-
V
i max
14.4 - 36 VDC
Options
η
typ
[%]
-7, B, B1, non-G
86
89
88.5
90
86
89
88.5
90
-7, P, F, B, B1, non-G
-7, F, B, B1, non-G
-7, P, F, B, B1, non-G
I
o nom
[A]
20
16
8
6.6
4.4
7.5
4
3.3
2.2
I
o nom
[A]
-
-
-
-
-
7.5
4
3.3
2.2
η
min2
[%]
81
85
87
87
88
85
87
87
89
η
typ
[%]
86
88.5
89
90.5
86
88.5
89
90.5
V
i min
-
V
i max
21.6 - 54 VDC
η
min2
[%]
85.5
87
86.5
88
85.5
87
86.5
88
BQ1101-9G
BQ1001-9RG
BQ2320-9RG
BQ2540-9RG
BQ2660-9RG
BQ2001-9RG
BQ2320-9RG
BQ2540-9RG
BQ2660-9RG
GQ1101-9G
GQ1001-9RG
GQ2320-9RG
GQ2540-9RG
GQ2660-9RG
GQ2001-9RG
GQ2320-9RG
GQ2540-9RG
GQ2660-9RG
24
3
5.1
4
12
4
15
4
24
4
1
15
4
24
4
2
3
4
The cumulated power of both outputs cannot exceed the total power for the specified ambient temperature.
See also
Output Power at Reduced Temperature.
Minimum efficiency at
V
i nom
,
I
o nom
and
T
A
= 25 °C
Double-output models with both outputs connected in parallel
Double-output models. The isolated output 2 is a tracking output 1.
NFND: Not for new designs.
Preferred for new designs
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BCD20011 Rev AL1, 08-Aug-2018
© 2018 Bel Power Solutions & Protection
Page 2 of 31
Q Series
66 - 132 W DC-DC Converters
Table 1b: Model Selection CQ, 48Q
Output 1
V
o nom
[VDC]
3.3
5.1
5.1
12
3
Output 2
I
o max
[A]
25
20
-
10
-
8
-
5.5
-
8.5
5
-
4
-
2.7
-
V
o nom
[VDC]
-
-
-
-
-
-
-
-
-
5.1
4
Output power
1
T
A
= 71°C
T
A
= 50°C
P
o max
[W]
82
102
82
120
96
120
99
132
106
97
120
96
120
99
132
106
I
o max
[A]
-
-
-
-
-
-
-
-
-
8.5
5
-
4
-
2.7
-
P
o nom
[W]
66
82
-
96
-
99
-
106
-
77
96
-
99
-
106
-
Operating input voltage range, efficiency
V
i min
-
V
i max
33.6 - 75 VDC
Options
I
o nom
[A]
20
16
16
8
8
6.6
6.6
4.4
4.4
7.5
4
4
3.3
3.3
2.2
2.2
I
o nom
[A]
-
-
-
-
-
-
-
-
-
7.5
4
4
3.3
3.3
2.2
2.2
η
min2
[%]
82
85
88
88.5
88.5
85
87
88.5
88.5
η
typ
[%]
87
V
i min
-
V
i max
38.4 - 75 VDC
η
min2
[%]
-7, P, F, B, B1, non-G
-7, P, F, B, B1, non-G
CQ1101-9G
CQ1001-9RG
CQ2320-9RG
CQ2540-9RG
CQ2660-9RG
CQ2001-9RG
CQ2320-9RG
CQ2540-9RG
CQ2660-9RG
48Q1001-2R
89.5
48Q2320-2R
90
48Q2540-2R
90.5
48Q2660-2R
87
88
48Q2320-2R
90
48Q2540-2R
90
48Q2660-2R
83
85
85
87
-
-7, P, F, B, B1, non-G
-
-7, P, F, B, B1, non-G
-
-7, P, F, B, B1, non-G
-
-7, P, F, B, B1, non-G
-7, P, F, B, B1, non-G
12
3
15
3
15
3
24
3
24
3
5.1
4
12
4
12
4
15
4
12
4
12
4
15
4
85
85
87
-
-7, P, F, B, B1, non-G
-
-7, P, F, B, B1, non-G
-
15
4
24
4
24
4
15
4
24
4
24
4
Table 1c: Model Selection DQ, EQ
Output 1
V
o nom
[VDC]
3.3
5.1
12
3
15
3
24
3
5.1
4
Output 2
I
o max
[A]
25
20
10
8
5.5
8.5
5
4
2.75
V
o nom
[VDC]
-
-
-
-
-
5.1
4
Output power
1
T
A
= 71°C
T
A
= 50°C
P
o max
[W]
82
102
120
120
132
97
120
120
132
I
o max
[A]
-
-
-
-
-
8.5
5
4
2.75
P
o nom
[W]
66
82
96
99
106
77
96
99
106
Operating input voltage range, efficiency
V
i min
-
V
i max
43 - 108 VDC
Options
η
typ
[%]
-7, B, B1, non-G
86
89
89
89
86
89
89
89
-7, P, F, B, B1, non-G
-7, B, B1, non-G
-7, P, F, B, B1, non-G
I
o nom
[A]
20
16
8
6.6
4.4
7.5
4
3.3
2.2
I
o nom
[A]
-
-
-
-
-
7.5
4
3.3
2.2
η
min2
[%]
82*
85.5
88
89
89
85
88
89
89
η
typ
[%]
86.5
90
90.5
90
86.5
90
90.5
90
V
i min
-
V
i max
66 - 150 VDC
η
min2
[%]
85
87
87.5
87.5
84
87
87.5
87.5
DQ1101-9G
DQ1001-9RG
DQ2320-9RG
DQ2540-9RG
DQ2660-9RG
DQ2001-9RG
DQ2320-9RG
DQ2540-9RG
DQ2660-9RG
EQ1101-9G
EQ1001-9RG
EQ2320-9RG
EQ2540-9RG
EQ2660-9RG
EQ2001-9RG
EQ2320-9RG
EQ2540-9RG
EQ2660-9RG
12
4
15
4
24
1
4
12
4
15
4
24
4
2
3
4
The cumulated power of both outputs cannot exceed the total power for the specified ambient temperature.
See also
Output Power at Reduced Temperature.
Minimum efficiency at
V
i nom
,
I
o nom
and
T
A
= 25 °C
Double-output models with both outputs connected in parallel
Double-output models. The isolated output 2 is a tracking output 1.
NFND: Not for new designs.
Preferred for new designs
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BCD20011 Rev AL1, 08-Aug-2018
© 2018 Bel Power Solutions & Protection
Page 3 of 31
Q Series
66 - 132 W DC-DC Converters
Part Number Description
Input voltage
V
i nom
:
C Q 2 5 40 -9 R B1 G
Series
24 V ..................................................................... B
36 V ......................................................................G
48 V ......................................................................C
48 V (Telecom, NFND)........................................ 48
72 V ......................................................................D
110 V .....................................................................E
..............................................................................Q
Number of outputs:
Single output models ............................................ 1
Double output models .......................................... 2
Single output models (long case)
2
....................... 6
Double output models (long case)
2
...................... 7
Nominal voltage of main output:
3.3 V ..................................................................... 1
5.1 V ..................................................................... 0
12 V ...................................................................... 3
15 V ...................................................................... 5
24 V .................................................................. 6, 7
Other voltages ..............................................
7, 8, 9
Other specifications and additional features
for single output models
3
............................
01 - 99
Nominal voltage of output 2,
V
o2 nom
:
5.1 V ............................................................
01 - 09
12 V .............................................................
20 - 39
15 V .............................................................
40 - 59
24 V .............................................................
60 - 79
Other voltages and additional features
5
......
01 - 99
Operational ambient temperature range
T
A
:
– 10 to 50 °C (NFND) ........................................... -2
– 25 to 71 °C (option, NFND) ............................... -7
– 40 to 71 °C ........................................................
-9
other
3
....................................................... -0, -5, -6
Output voltage adjust (auxiliary function) ................................R
Options:
Potentiometer (option, NFND)
1
............................ P
No fuse (option) .................................................... F
Additional heatsink ........................................ B, B1
RoHS-compliant for all 6 substances ......................................G
1
2
3
Option P excludes feature R and vice versa.
Models with 220 mm case length. Just add 5000 to the standard model number, e.g., CQ2540-9RG → CQ7540-9RG.
Customer-specific models.
Note:
The sequence of options must follow the order above. This part number description is not intended for creating part numbers.
NFND: Not for new designs.
Preferred for new designs
Example: CQ2540-9RB1G: DC-DC converter, input voltage range 33.6 to 75 V, double-output model, each output providing
15 V/ 3.3 A, equipped with a heat sink, operating ambient temperature
T
A
= – 40 to 71 °C, RoHS-compliant for all six substances.
Note:
All models have the following auxiliary functions, which are not shown in the type designation: input and output filter, inhibit, sense lines,
current sharing, Out OK signal, LED indicators, and test sockets (not 48Q models).
Note:
48Q models are designed according to Telecom standards ETS 300132-2 and EN 41003.
V
i min
is 38.4 V, such limiting the input current
I
i
to 150% of
I
i nom
.
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Page 4 of 31
Q Series
Product Marking
66 - 132 W DC-DC Converters
Type designation, applicable safety approval and recognition marks, CE mark, warnings, pin allocation, patents, and company logo.
Identification of LEDs, test sockets and potentiometer.
Input voltage range and input current, nominal output voltages and currents, degree of protection, batch no., serial no., and data
code including production site, version (modification status) and date of production.
Output Configuration
The Q Series design allows different output configurations to cover almost every individual requirement, by simply wiring the
outputs in parallel, series, or symmetrical configuration as per the following figures. For further information and for parallel and
series operation of several converters see
Electrical Output Data.
01001a
01002a
Single-output
model
Vo+
Vo+
4
6
12
14
8
10
Double-output
model
Vo2+
Vo1+
Load
28
30
32
6
4
12
14
8
10
28
30
32
i
Vi+
Vi–
S+
S–
Vo–
Vo–
i
Vi+
Vi–
S+
S–
Vo1–
Vo2–
Load
Fig. 1
Single-output configuration
01003a
Fig. 2
Parallel-output configuration
01004a
Double-output
model
Vo2+
Vo2–
28
30
32
6
10
4
12
14
8
28
30
32
Double-output
model
Vo1+
S+
i
Vi+
Vi–
S–
Vo1–
Vo2+
Vo2–
4
12
14
8
6
10
V
o
+
Load 1
GND
Load 2
V
o
–
i
Vi+
Vi–
Vo1+
S+
S–
Vo1–
Load
Fig. 3
Series-output configuration
01005a
Fig. 4
Symmetrical-output configuration (with common ground)
Double-output
model
Vo1+
S+
28
i
30
32
4
12
14
8
6
10
S–
Vo1–
Vo2+
Vo2–
Load 1
Vi+
Vi–
Load 2
Fig. 5
Independent-output configuration
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