Data Centers
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Introduction to Data Centers
§
What is a data center?
–
A facility that centralizes an organization’s IT operations and
equipment, and where it stores, manages, and disseminates its
data.
SUPPORT INFRASTRUCTURE
FACILITY
“White Space” – usable area to house equipment
Uninterruptible Power Supply (UPS),
Environment Controls, Biometric Security
INFORMATION TECHNOLOGY EQUIPMENT
Servers, cables, racks
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Data Center Market Trends
Source:
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Cloud Computing Driving Blade Server Growth
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Data Center Electrical Distribution
TIA-942 Data Center Standard, Tier IV, power distribution example
480V/227V
13.2 KV
Utility B
Generator
SPD
Fuel
SPD
ATS
Battery
PDU
STS
SPD Type II
Load
Load
(single
power
supply)
(dual
power
supply)
PDU
UPS
480V/227V
High-V AC Fuse
DC Gnd Fault
Relay
Battery
normally open tie switch
ATS
Generator
208V/120V
UPS
normally open tie switch
normally open tie switch
13.2 KV
Utility A
208V/120V
SPD Type III
PG Fuse
TMOV25S High-V AC/DC Fuse
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Nano
CCF
TVS
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Examples of HVDC Fuse Applications
•Data Centers
•Telecom/Datacom Central Offices
ICT Equipment (server,
communication)
DC 380V
Rectifier
DC/DC
12V
PSU
3Φ AC 480V
AC/DC
DC 380V
Battery
fan
VR
CPU
VR
PDU
Lighting
•Battery output
•PDU output
•PSU input
DC 380V
DC/DC
PSU
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Blade – Dual redundant power input
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Littelfuse Portfolio for High Voltage DC Fuses
Fuse Type
Footprint (mm)
250 Vdc
400 Vdc
450 Vdc
500 Vdc
600 Vdc
1000 Vdc
Through Hole / Cartridge
4.65 x 8.9
5 x 20
808 (2~5A)
477 (0.5~16A)
977 (0.5~16A)
Surface Mount
6 x 32
10 x 38
505 (10~30A)
506 (15~20A)
508 (0.315~1A)
KLK (0.3~30A)
KLKD (0.1~30A)
FLU (0.44~11A)
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10.5 x 4.5
462 (0.5~5A)
12.1 x 4.5
485 (0.5~3.15A)
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Littelfuse EBU Fuse Solutions – Cartridge
Amp Ratings: 30, 40A
Amp Ratings: 15, 16, 20A
Amp Ratings: 10, 12, 15, 20, 25,
30, 40A
Amp Ratings: 10, 12.5, 15, 16, 20A
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Amp Ratings: 10, 12, 16, 20,
25, 30A
Amp Ratings: 10, 12, 16A
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Littelfuse EBU Fuse Solutions – Surface Mount
Amp Ratings: 7, 10, 15A
Amp Ratings: 15, 20, 25, 30A
Amp Ratings: 10, 12, 15
Amp Ratings: 1 – 3.15A
Amp Ratings: 10, 15, 20A
Amp Ratings: 10, 12, 15, 20A
Amp Ratings: 7, 10, 12A
Amp Ratings: 7, 10A
Amp Ratings: 7, 8, 10A
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476 Series Key Features and Benefits
Key Features
Benefits
•  250Vac rated surface mount fuse
•  SMT is the trend in compact, space-limited
applications; it also enables higher speed
and yield in manufacturing processes
•  High Interrupt Rating 10kA@86VDC
for 6.3A ~15A ratings
•  Suitable for uninterrupted power supply
and other power supply applications where
such high interrupt rating is required
•  More energy in a miniature 2410
footprint
•  Ensures superior protection while occupies
less board space
•  High operating temperature at 125oC
•  Ideal for high temperature applications such
as LED lighting
•  Surge immunity capability
–  Global: IEC61000-4-5 2 ed. (3A
and above ampere rating only)
•  Withstands surge from AC power line and
keep LED light bulb/tube working
continuously
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476 Series Electrical Specifications
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Target Customers
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