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Embedded Power for
Business-Critical Continuity
IBC
Eighth-Brick Series
2nd Generation IBC
Rev.11.25.08_136
Eighth-Brick IBC Series
 of 3
Total Power: 200 - 300W
Input Voltage: 36 - 75Vdc
Special Features
• 48 V input with isolated 12 V
output
• Ultra-high efficiency, 95.5%
12 V @ 25 A
• Unprecedented usable
output power levels
• High power density
(362 W/in3) open-frame
technology
• Wide operating ambient
temperature range
• Industry standard eighth-
brick footprint and pinout
• Low profile, 0.40” (10.2 mm)
• Meets basic insulation
requirements of EN60950-1
• Remote ON/OFF and over-
temperature protection
• Available RoHS compliant
• 2 year warranty
Safety
• UL/cUL 60950-1, 1st Edition
• EN 60950-1 VDE
Electrical Specifications
Output
Output setpoint accuracy:
Line regulation:
Load regulation:
Total error band
(including setpoint, line,
load and temperature):
Minimum load:
Overshoot:
Undershoot:
Ripple and noise:
5 - 20 MHz
Low line to high line
Full load to min. load
IBC25AET4812
IBC20AES4812
IBC17AEW4812
At turn on and turn-off
(See note 2)
See table
See table
See table
9.70 - 13.40 Vdc
11.52 - 12.48 Vdc
11.40 - 12.60 Vdc
0A
None
None
60 mV pk-pk typ.
20 mV rms typ.
Input
Input voltage range:
Input current:
Input current (max.):
Input reflected ripple:
(See note 4)
Remote ON/Off:
Logic compatiblity:
On
OFF
Undervoltage lockout:
IBC25AET4812:
IBC20AES4812:
IBC17AEW4812:
Startup time (see note 3):
Remote OFF
(See note 1)
IBC25AET4812
IBC20AES4812
IBC17AEW4812
Power-up
Power-down
Power up
Power down
Power-up
Remote ON/OFF
See table
6 mA typ.
6.9 A max. @ lo max.
and Vin = min. rated
550 mA (pk-pk)
230 mA (pk-pk)
230 mA (pk-pk)
(see note 6)
Open collector ref. to- input
>2.4 Vdc
<0.4 Vdc
40 V
38 V
35.2 V
34 V
15 ms
5 ms

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Embedded Power for
Business-Critical Continuity
EMC Charateristics
Immunity:
ESD air enclosure:
Input transients:
EN61000-4-2 8 kV, 6 kV (Air contact)
IBC25AET4812 60 V. 100 ms
IBC20AES4812 60 V. 100 ms
IBC17AEW4812 100 V. 100 ms
General Specifications
Efficiency:
See table
Basic insulation:
Input/output 2250 Vdc
Switching frequency: Fixed 600 kHz typ.
Approvals and
EN60950-1 VDE
standards (see note 5): UL/cUL60950-1
Rev.11.25.08_136
Eighth-Brick IBC Series
 of 3
Environmental Specifications
Thermal
Operating ambient temperature -40 °C to +85 °C
performance: Non-operating -55 °C to +125 °C
Protection
Short-circuit:
Overvoltage: (See note 9)
Thermal:
Hiccup
Non-latching
125 °C hot spot
Material flammability:
Weight:
MTBF
Representative model:
UL94V-0
33 g (1.16 oz)
Telcordia Tech SR-332 5,500,000 hours
48 Vin, 40 °C, 50% load
ground benign
All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
Ordering Information
Output
Power
(Max.)
300 W
240 W
200 W
Input
Voltage
42 - 53 Vdc
42 - 53 Vdc
36 - 75 Vdc
Output
Voltage
12 V
12 V
12 V
Output
Current
(Min.)
0A
0A
0A
CAUTION: Hazardous internal voltages and high temperatures.
Ensure that unit is not user accessible.
Output Current Efficiency
(Max.)
(Typ.)
25 A 95.5%
20 A 94.5%
17 A 94.0%
Set Point
Accuracy %
---
±0.25%
±0.25%
Regulation2 (typical)
Line %
Load %
+10, -12.5%
±0.3%
±1.0%
±1.5%
-2/-1.5%
-3/+2%
Model Number
IBC25AET4812J
IBC20AES4812J
IBC17AEW4812J
Part Number System with Options
Product Family
IBC
Rated Output
Current
17A
Form Factor
E
IBC Intermediate
Bus Converter
2nd Generation
17 A =
17 Amps etc.
E = Eighth-
Brick
Q = Quarter-
brick
S = Sixteenth-
brick
Input Voltage Type
W
T = Narrow Input
Fixed Ratio
S = Narrow Input
Semi-reguated
N = Narrow Telecom
Fixed Ratio
W = Wide Telecom
Semi-reguated
Input
Voltage
48
Output
Voltage
Remote ON/
OFF Logic
12 - R
48 = 48 V 12 = 12 V
Blank =
Positive
R = Negative
(See Note 6)
Module Height
A
Pin Length
Options
N
RoHS Compliance (7, 8)
J
A = Open-frame
0.40 in (10.2
mm)
E = Open-rame,
0.45 in (11.4
mm)
Blank = 0.188 ”
(4.78 mm)
N = 0.145 ”
(3.68 mm)
K = 0.110 ”
(2.79 mm)
J = Pb-free
(RoHS 6/6
compliant)
Y = RoHS 5/6
compliant
Notes
1 Recommended input fusing is a 20 A HRC 250 V rated fuse.
2 Measured with external filter. See Application Note 182 for details.
3 Start-up into resistive load.
4 Peak to peak measured without external Pi filter. Significant reduction
possible with external filter. See Application Note 182 for details.
5 This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand alone product.
6 Active-low remote ON/OFF option is also available. Please add the suffix ‘-R’
to the part number, e.g. IBC17AEW4812-RAJ.
7 TSE RoHS 5/6 (non Pb-free) compliant versions may be available on special
request, please contact your local sales representative for details.
8 NOTICE: Some models do not support all options. Please contact your local
Sales representative or use the on-line model number search tool at http://
www.powerconversion.com to find a suitable alternative.

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Embedded Power for
Business-Critical Continuity
Mechanical Drawing
0.1450.020
[3.680.51]
0.90
[22.9]
0.300
[7.62]
0.300
[7.62]
0.45
[11.4]
1
2
3
2.30
[58.4]
2.000
[50.80]
Refer to Part
Numbering Options
Table for Pin Length
ø0.092 [2.34]
0.04 [1.0]
MIN
0.060 [1.52]
0.040 [1.02]
Solder venting
feature
5
4
Refer to Part
Numbering Options
Table for Module Height
ø0.093 [2.36]
ø0.062 [1.57]
ø0.122 [3.10]
Dimensions in Inches (mm)
Tolerances (unless otherwise specified)
x.xx 0.02 (x.x 0.5)
x.xxx 0.010 (x.xx 0.25)
Pin Connections
Pin Number Function
1 +Vin
2 Remote ON/OFF
3 -Vin
4 -Vout
5 +Vout
­Americas
Rev.11.25.08_136
Eighth-Brick IBC Series
5810 Van Allen Way
 of 3
Carlsbad, CA 92008
USA
Telephone: +1 760 930 4600
Facsimile: +1 760 930 0698
Europe (UK)
Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX
United Kingdom
Telephone: +44 (0) 1384 842 211
Facsimile: +44 (0) 1384 843 355
Asia (HK)
14/F, Lu Plaza
2 Wing Yip Street
Kwun Tong, Kowloon
Hong Kong
Telephone: +852 2176 3333
Facsimile: +852 2176 3888
For global contact, visit:
www.powerconversion.com
techsupport.embeddedpower
@emerson.com
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accuracy and completeness in this literature, Emerson
Network Power assumes no responsibility, and disclaims
all liability for damages resulting from use of this
information or for any errors or omissions.
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