B40SR12424A/B/C/D
12V Output DC/DC Converter, Box Type Package
FEATURES
Wide input voltage range, 18~60V
200W Output @ 18V~27V Vin range
300W Output @ 27~60V Vin range
Full Load Efficiency up to 88.3% @48Vin
Intergrated fuse holder (option)
Parallel Connection of multiple units
Box type package with metal base plate
Package Dimension:
190.0x76.0x44.0mm (7.48”x2.99”x1.73”)
Operating Temperature Range - 40°C to +75°C
Input Reverse Polarity Protection
Minimized Inrush current
Input UVLO, Output OCL, Short circuit protection,
OVP, OTP
Enable on/off (option)
2250VDC Isolation
IP67 protection for selective model
RoHs Compliant
ISO 9001, ISO 14001 certified manufacturing facility
UL60950
CE Mark
EMC compatible: EN12895, CISPR11 ClassA
Electrical transient conduction: ISO7637-2
The B40SR12424, a wide input voltage range of 18~60V, and single isolated output converter, is the latest product offering from a world
leader in power systems technology and manufacturing ― Delta Electronics, Inc. Such box type DCDC converter can provide 300W (200W at
Vin < 27V), 12.4V regulated DC output voltage with full load efficiency up to 88.3% @48Vin; The B40SR12424 offers input UVLO, output over
current limit, short circuit, output over voltage, over temperature, and input reverse polarity protections, It has an option for intergrated fuse
holder and enable on/off function. It also has parallel function; and allows a wide operating temperature range of –40°C to +75°C. With
creative design technology and optimization of component placement, this converter possess outstanding electrical and thermal
performance, as well as high reliability under extrmely harsh operating conditions. The B40SR12424 meet IP67 protection (refer to “water
protection level” specification).
Input Characteristics
Item
Condition
Continuous Input Voltage
Max Input voltage
Min.
Typ.
Max.
Unit
18
48
60
VDC
80
VDC
10 minutes, normal operating
Input Under-Voltage Lockout, Turn-On Voltage
Threshold
16
17
18
VDC
Input Under-Voltage Lockout, Turn-Off Voltage
Threshold
14
15
16
VDC
1
2
3
VDC
Vin=18V, 100% Load
12.6
13.1
A
Vin=24V
85
110
mA
Vin=48V
40
70
mA
Vin=48V, enable off (C version)
8
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off converter input current
15
mA
0.2
A
Max Reverse Polarity Input Voltage
60
VDC
Max Inrush current
10
A
Reflected input ripple current
Internal Input Fuse
DS_B40SR12424_10082021
Vin=48V, Vpp
Ø 6.35mm*31.75mm
250V/30A Fast-acting fuse
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Output Characteristics
Item
Operating Output Current Range
Output Voltage Set Point
Output Voltage Ripple and Noise,
Output Current Limit
Current share accuracy
Start-up time(start _up time by Vin)
Start-up time(start _up time by Enable)
Rise time
Output Voltage Protection
Conditions
Vin=18V~27V
Vin=27V~60V
Vin=24V,36V,48V, Io=0
Vin=24V, Io=16A
Vin=36V,48V, Io=24A
Vin=36V, 48V, peak to peak,
20MHz bandwidth
RMS
Vin=24V, Io=16A
peak to peak, 20MHz bandwidth
RMS,Vin=24V, Io=16A
Vin=24V
Vin=36V, 48V
Vin=36V, 48V, 24A for each module
Vin=48V,full load
Vin=48V,full load (for C)
General Characteristics
Isolation Voltage,
Isolation Resistance, Input to Output
Isolation Capacitance, Input to Output
Switching Frequency
MTBF
Weight
DS_B40SR12424_10082021
16.5
25
13
Vin=24V, 8A to 12A load dynamic, 0.1A/us
slew rate
Output Voltage Current Transient, positive
Vin=36V,48V, 12A to 18A load dynamic,
and nagetive voltage step
0.1A/us slew rate
Maximum Output Capacitance
ESR>10mohm
Output overshoot
Efficiency @ 100% Load(16A)
Vin=24V
Efficiency @ 100% Load(24A)
Vin=36V
Efficiency @ 100% Load(24A)
Vin=48V
Efficiency @ 60% Load(9.6A)
Vin=24V
Efficiency @ 60% Load(14.4A)
Vin=36V
Efficiency @ 60% Load(14.4A)
Vin=48V
Item
Min.
0
0
12.4
12.13
12.0
Conditions
Input to Output, Input to Case
Ouput to Case
Typ.
12.6
12.33
12.2
Max.
16
24
12.8
12.53
12.4
Unit
A
A
V
V
V
100
160
mV
35
50
mV
60
90
mV
20
18.5
28
6
750
250
30
15
30
20.5
31
10
900
350
50
17
mV
A
A
%
mS
mS
mS
V
100
150
mV
100
150
mV
5000
3
µF
%
%
%
%
%
%
%
Max.
2250
550
Unit
VDC
VDC
MΩ
pF
KHz
Mhours
g
86.8
86.5
86.3
87.6
87.8
87.3
88.8
88.5
88.3
89.6
89.8
89.3
Min.
Typ.
10
Ta=25ºC, 80%load
6000
175
0.7
900
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Environmental Specifications
Parameter
Storage Temperature Range
Operating Temperature Range
Over Temperature Protection
Humidity (non condensing)
Water Protection Level
Vibration
Shock
Emission
Immunity
ESD
Conditions
Ambient Temperature
NTC Temperature
For model P/N with suffix B
IEC 60068-2-6
IEC 60068-2-27
EN12895
EN12895, EN61000-4-3
EN12895, EN61000-4-2
Min.
-40
-40
Max.
+125
+75
118
Unit
℃
℃
℃
% rel. H
95
IP67
10G/15~200HZ/3 PLANES
50G 3 PLANES
30-1000MHz 34-45dBuV/m
10V/m /27-1000MHz AM; 10V/m /900MHz PM
Direct: ±2KV ±4KV; Air: ±2KV ±4KV ±8KV
Notes
1
2
Specifications typical at Ta=+25℃, nominal input voltage and rated full load output current unless otherwise noted.
Specifications are subject to change without notice.
ELECTRICAL CURVES
Figure 1: Efficiency vs. Output current
@ Vin=24V,36V,48V
DS_B40SR12424_10082021
Figure 2: Loss vs. Output current
@ Vin=24V,36V,48V
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ELECTRICAL CURVES
Figure 3: Dynamic response to load step 12A~18A with
0.1A/uS slew rate at 48Vin
CH1:VOUT, 100mV/div, 500uS/div
Figure 4: Vout start up with Vin on at 48Vin,24A Iout,
TOP: VIN, 20V/div, 200mS/div
BOTTOM: VOUT, 5V/div, 200mS/div
Figure 5: Output ripple & noise at 48Vin, 24A Iout
CH1: VOUT, 50mV/div, 5uS/div
Figure 6: Output over voltage protection at 48Vin, 24A Iout
CH1: VOUT, 10V/div, 50mS/div
Figure 7: Input current vs. Input voltage
@ Vin=18V~27V, 200W;
Vin=27V~60V, 300W
Figure 8: Output voltage vs. Output current
OCL Performance
DS_B40SR12424_10082021
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ELECTRICAL CURVES (continous)
Figure 9: Output voltage vs. Output current
@Vin=48V. Droop function.
Figure 10: Current share accuracy vs. Total output current
2 in parallel.
Figure 11: Inrush current @ Vin=48V
CH1:Iin, 2A/div, 200nS/div
Max current 2.7A, I2t=1.24E-7 A²S
DS_B40SR12424_10082021
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FEATURES DESCRIPTIONS
Output Over-Current Limit and Short Protection
The modules include internal output over-current limit (OCL) and short circuit protection (SCP) circuits, the
OCL set point is lower than that of the SCP; The response of SCP circuit is much fast than that of the OCL
circuit. The slowly increase of the output current will let module enter OCL protection when the current exceeds
the OCL set point, while the fast increase of the output current will let module enter SCP when the current
exceeds the SCP set point.
When the modules enter OCL protection, the output voltage will decrease while the output current is kept
constant, the output voltage will soft start to set point when the overload condition is removed.
The module will enter hiccup mode when it triggers the SCP set point. The module will try to restart after
shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue
until the overload condition is removed.
Output Over-Voltage Protection
The power module includes an internal output over-voltage protection (OVP) circuit, which monitors the
voltage on the output terminals. If this voltage exceeds the OVP set point, the module will shut down, and then
restart after a fixed delay time (hiccup mode), please refer to figure8 for detail.
Over-Temperature Protection
The over-temperature protection consists of circuitry that provides protection from thermal damage. If the
temperature exceeds the preset temperature threshold the module will shut down, and all components will not
exceed their absolute maximum temperature ratings. The module will restart after the temperature is within
specification.
Remote On/Off
B40SR12424C has Enable control function. This Enable PIN is designed on the primary side of converter, the
converter will turn on when the Enable PIN connected to VIN+, and turn off when the Enable PIN connected to
VIN- or floating.
Figure 12: suggested Enable connection
Input Reverse Voltage Protection
The input reverse voltage protection is provided by a diode on the input line, the standoff voltage for the
reverse protection shall be no less than -60V.
DS_B40SR12424_10082021
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DESIGN CONSIDERATIONS
Parallel connection of multiple units
Two units’ parallel operation is verified, please contact Delta if more than two units need to be paralleled.
While parallelling multiple units, the impedance of the cables from unit to junction point of each unit should be
within ±5% of each other.
Figure 13: suggested parallel connections
EMC
80
80
70
70
60
60
50
50
Level in dB米V/
Level in dB米V/
The converter has the internal EMI filters and meet the EMC standards EN12895 30-1000MHz 34-45dBuV/m.
The test result is showed as below
Conditions: Vin=48V, Io=24A, 10m measure distance
40
30
20
10
0
30M
40
30
20
10
50 60
80 100M
200
300
400 500
Figure 14: test result (Vertical)
800
1G
0
30M
50 60
80 100M
200
300
400 500
800
1G
Figure 15: test result (Horizontal)
Fuse replacement
For the versions with the intergratted the fuse holder, when the fuse needs to be replaced, it can be taked down
in an anticlockwise direction by slotted type screwdrivers.
Recommended fuse replacement P/N:
Littlefuse 0314030.MXP
DS_B40SR12424_10082021
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THERMAL CONSIDERATION
The thermal curve (Figure17~19) is based on a 250x300x5mm AL table, shown as below figure.
Figure 16: Thermal consideration
THERMAL CURVE
Figure 17: Output Current vs. Ambient temperature @Vin=24V
DS_B40SR12424_10082021
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THERMAL CURVE
DS_B40SR12424_10082021
Figure 18:
Output Current vs. Ambient temperature @ Vin=36V
Figure 19:
Output Current vs. Ambient temperature @ Vin=48V
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THERMAL CONSIDERATION
The following figure shows the location to monitor the temperature of base plate. Before customer decides to
use this DCDC converter, a thermal evaluation need to be did to make sure the temperature of base plate is
lower than that read from below thermal curves (Figure21~23 base on different input voltage).
Figure 20: Thermal consideration
THERMAL CURVE
Figure 21: Output Current vs. Base Plate temperature @Vin=24V
DS_B40SR12424_10082021
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THERMAL CURVE
DS_B40SR12424_10082021
Figure 22:
Output Current vs. Base Table temperature @ Vin=36V
Figure 23:
Output Current vs. Base Table temperature @ Vin=48V
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Mechanical Drawing
Mechanical Dimensions
Pin Connections
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
All dimensions in mm (inches)
Tolerance:X.X±0.5 (X.XX±0.02)
Connector:
MOLEX MINI-FIT SrTM Header
X.XX±0.25 ( X.XXX±0.010)
(MOLEX P/N :42819-4213)
B40SR12424A
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
All dimensions in mm (inches)
Tolerance:X.X±0.5 (X.XX±0.02)
Connector:
MOLEX MINI-FIT SrTM Header
X.XX±0.25 ( X.XXX±0.010)
(MOLEX P/N :42819-4213)
B40SR12424AC
DS_B40SR12424_10082021
Connector kit :
Housing: 42816-0412
Terminal: 42815-0042
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Mechanical Drawing
Mechanical Dimensions
Pin Connections
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
All dimensions in mm (inches)
Tolerance:X.X±0.5 (X.XX±0.02)
Connector:
Deutsch DTP Receptacles
X.XX±0.25 ( X.XXX±0.010)
B40SR12424B
(DEUTSCH P/N :DTP04-4P)
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
All dimensions in mm (inches)
Tolerance:X.X±0.5 (X.XX±0.02)
Connector:
Deutsch DTP Receptacles
X.XX±0.25 ( X.XXX±0.010)
(DEUTSCH P/N :DTP04-4P)
B40SR12424BC
DS_B40SR12424_10082021
Connector kit :
Housing: DTP06-4S
Wedge lock: WP-4S
Terminal: 0462-203-12141
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Mechanical Drawing
Mechanical Dimensions
Pin Connections
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
5
ENABLE
All dimensions in mm (inches)
Tolerance:X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)
Connector:
MOLEX MINI-FIT SrTM Header
(MOLEX P/N :42819-5213)
B40SR12424C
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
5
ENABLE
All dimensions in mm (inches)
Tolerance:X.X±0.5 (X.XX±0.02)
Connector:
MOLEX MINI-FIT SrTM Header
X.XX±0.25 ( X.XXX±0.010)
(MOLEX P/N :42819-5213)
B40SR12424CC
DS_B40SR12424_10082021
Connector kit :
Housing: 42816-0512
Terminal: 42815-0042
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Mechanical Drawing
Mechanical Dimensions
Pin Connections
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
All dimensions in mm (inches)
Tolerance:X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)
Connector:
MOLEX MINI-FIT SrTM Header
(MOLEX P/N :42819-4213)
B40SR12424D
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
All dimensions in mm (inches)
Tolerance:X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)
Connector:
MOLEX MINI-FIT SrTM Header
(MOLEX P/N :42819-4213)
B40SR12424DC
DS_B40SR12424_10082021
Connector kit :
Housing: 42816-0412
Terminal: 42815-0042
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Part Numbering System
B
Form
Factor
BBox
40
S
R
124
24
A
C
Input
Voltage
Number
of
Outputs
Product
Series
Output
Voltage
Output
Current
Option Code
Option
Fitting
40 18V~60V
SSingle
RRegular
124 12.4V
24 24A
With
Built-in
fuse
holder
Enable
pin
Sealed
connector
& fuse
holder
Connector Kit
A
YES
NO
NO
1xhousing+ 4 terminals
B
YES
NO
YES
1xhousing+ 4 terminals
C
NO
YES
NO
1xhousing+ 5 terminals
D
NO
NO
NO
1xhousing+ 4 terminals
Model List
Input Voltage Range
B40SR12424(A\B\C\D)
Input
18V~60V
EFF @48VIN 100%
LOAD
Output
13.1A
12.4V
CONTACT: www.deltaww.com/dcdc
Email: dcdc@deltaww.com
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Europe:
Phone: +31-20-655-0967
Fax: +31-20-655-0999
24A
88.3%
Asia & the rest of world:
Telephone: +886 3 4526107
ext 6220~6226
Fax: +886 3 4513485
WARRANTY
Delta offers a two (2) years limited warranty. Complete warranty information is listed on our web site or is available upon
request from Delta.
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its
use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications at
any time, without notice.
DS_B40SR12424_10082021
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