2U 750Rx Gold / 2U 850Rx Gold
2U Single SERIES
80 PLUS Gold 750W / 850W 2U Single Fixed cable power supply
Support standard 2U Single form factor
Supports 12V-2x6 PCIe connector and compatible ATX 3.1 and PCIe Gen 5 standard
Latest PCIe Gen 5 standard to support up to 2X power excursion
Black flat cable design
Main Japanese electrolytic capacitors
Silent running 60mm dual ball bearing fan
High efficiency with 80PLUS Gold certification
24/7 continuous power output with 50℃ operating temperature
750W / 850W
2U 750Rx Gold / 2U 850Rx Gold
2U Single
SST-2U750R-GF / SST-2U850R-GF
ATX Switching Power Supply
Cybenetics Gold efficiency certified.
This document defines the Desktop Power Supply quality, 5 output 850W/750W,
power supplies for
the application of Desktop systems.
The power supplies meet the buss structures of Intel platform, and the following
key features:
(1)Input: Full Range (90-264Vrms) with Active Power Factor Correction.
(2)Output: Product is provided with a total of 5 output to meet the requirement of
ATX12V platform.
(3)Cooling: A 60mm high reliable DC fan is used for cooling the power supply.
1.Scope
The electrical specifications that follow is going to meet over the environmental
ranges specified in Section 3 unless otherwise noted.
Table 1 lists AC input voltage and frequency range for continuous operation. The
power supply is capable of supplying full-rated output power over the input
2.Electrical
2.1 AC Input
Parameter Min Nominal Input Max Unit
V
in
Voltage
90 100-240 264 Vrms
V
in
Frequency
47 50/60 63 Hz
V
in
Current / 850W
12A A
Vin Current / 750W
10A A
Power Factor(PF)
>0.95 at 230Vac input and full
load
Table 1 . A C i npu t
01
2.2 DC Output
2.2.1 DC Output Voltage Regulations
2.2.2. DC Output Load Distributions
The Table 3. defines the power supply typical output load distribution.
Table 3. DC Output Load Distribution (1000W/850W/750W)
Note: -12V at 0.3A maximum requires +12V rail to be loaded at 2A minimum.
Note: +12V at full load requires -12V rail to be loaded at 0.2A minimum.
The inrush current is less than 130A under the conditions of 230Vrms input and
25°C ambient cold start. The inrush current is limited to the extent that no damage
will be done to the power supply under any specified line, load, and temperature
conditions. The inrush current will not cause external protection devices (fuses) to
trip.
The leakage current of the power supply module is less than 3.5mA measured at
230Vac input.
The repetitive ON/OFF cycling of AC input voltage will not damage the power
supply.
The primary fuse is installed for input over-current protection, and meet product
safety requirement.
The DC output voltages remain within the regulation ranges shown in Table 2.
when measured the at load end of the output connectors under all AC line, O/P
loads, and environmental conditions. The voltage regulation will be maintained
under continuous operation for a period of time equal to the MTBF specified in
section 5.2 at any steady state temperature and operating conditions specified in
section 3.
+12V +5V +3.3V -12V +5Vsb Unit
Total DC Output
Regulation
±5.0% ±5.0% ±5.0% ±5.0% ±5.0% Volt
Table 2. DC Output Voltage Regulations
Output
Rail
Output
Voltage
Minimum
Current (A)
850W
Max (A)
750W
Max (A)
V1 +12V 0.0 70.8 62.5
V2
+5V 0.0 25.0 25.0
V3 +3.3V 0.0 25.0 25.0
V4 -12V 0.0 0.3 0.3
V5 +5Vsb 0.0 3.0 3.0
Total Continuous Power
850W 750W
Max. combined O/P of V1
849.6W 750W
Max. combined O/P of V2 & V3
150W 150W
02
03
2.2.3. DC Output Efficiency & Eup* requirements & Low Load Efficiency
DC Output Efficiency
The power supply efficiency is 80% minimum measured at 10%, efficiency is 87.0%
minimum measured at 20%, efficiency is 90.0% minimum measured at 50%,
efficiency is 87.0% minimum measured at 100% which is 115Vrms conditions.
shown in Table 4.
Eup* requirements
In order to meet the 2010 and 2013 ErP Lot 6 requirements, AMS&2014 ErP Lot 3
requirements, and if any Computers use an Alternative Sleep Mode (ASM) then
the 5V standby efficiency should be met as shown in Table 5 which is measured
with the main outputs off (PS_ON# high state).
Low Load Efficiency
The lowest DC load for computers at this Idle Mode is determined to be 10 Watts
for mainstream computers, shown in Table 6. Computers with PSU larger than
500 Watts are also expected to have more components and therefore the Idle
Mode will be at a higher DC Load. The PSU above 500 Watts will use the Low
Load Efficiency set at the 2% level. Low Load Efficiency levels will be phased in
over time.
Table 4. The power supply typical output load distribution
Table 5. The power supply typical output load distribution
LOAD +12V +5V +3.3V -12V +5VSB SPEC(115/230Vac)
850W
10% 6.22A 1.06A 1.06A 0.03A 0.26A >80%
20% 11.82A 3.02A 3.02A 0.05A 0.50A >87%
50% 29.55A 7.54A 7.54A 0.13A 1.25A >90%
100% 59.11A 15.08A 15.08A 0.25A 2.5A >87%
750W
10% 5.10A 1.48A 1.48A 0.02A 0.24A >80%
20% 10.21A 2.95A 2.95A 0.05A 0.49A >87%
50% 25.51A 7.38A 7.38A 0.120A 1.22A >90%
100% 51.03A 14.76A 14.76A 0.24A 2.45A >87%
5VSB Load Target 5VSB Actual Load
Efficiency Target
(both 115V and 230V input)
Remark
45mA ≥45%
ErP* Lot 6 2013
90mA ≥45%
ErP* Lot 6 2010
0.55A ≥75%
ASM and ErP* Lot 3 2014
1.00A ≥75% Recommend
1.50A ≥75%
ASM and ErP* Lot 3 2014
Max / Label 3.0A /Label ≥75% Recommend
2.2.4. DC Output Ripple & Noise
2.2.5. DC Output Transient Response
2.2.6. DC Output Voltage Hold-up Time
The output ripple & noise specifications listed in Table 7. will meet throughout
the load ranges as specified in section 2.2.2 and the nominal line input voltage
conditions as specified in section 2.1. Ripple & noise is defined as periodic of
random signals over a frequency band of 10Hz to 20MHz. Measurements
should be made with an oscilloscope with 20MHz bandwidth. adding a 10uF
electrolytic capacitor and a 0.1uF ceramic capacitor across output terminal
during ripple & noise measurement.
The output voltages will remain within the regulation limits specified in Table 2.
The load-changing repetition rate is 50Hz to 10KHz, and the transient load slew
rate 1.0A/us. The maximum step load size, and output capacitive loading are
specified as followings in Table 8.
The power supply will maintain outputs in regulation per section 2.2.1 despite a
loss of input power at the nominal range of AC input and at 80% of maximum
continuous output load as applicable for a minimum of 17 msec.
2.2.7 Load Transient Response (Step Load):
+12V Step load changes
○ Up to 85%@min. load condition
○ PCI-E CEM5 100% to 200% for power excursion
04
10W / 2% Low Load 60%
Table 6. Low Load Efficiency
+12V +5V +3.3V -12V +5Vsb Unit
Max Ripple & Noise
80 50 50 60 50
mV
P
-
P
Table 7. DC Output Ripple & Noise
+12V +5V +3.3V -12V +5Vsb
Voltage limits.
±5% ±5% ±5% ±10% ±5%
Load Change
Low Load
2.0%~72% 0.0%~30% 0.0%~30% 0A ~ 0.1A 0A ~ 0.5A
Load Change
High Load
30%~100% 70%~100% 70%~100% 0.2A ~ 0.3A 2.0A ~ 2.5A
Capacitive Load 10000uF 10000uF 10000uF 470uF 3300uF
Table 8. DC Output Transient Response
05
2.3. Timing / Housekeeping / control
●Other loads remain constant within the rating.
● Load waveform
○ Square wave.
○ Slope of rise and fall at 5.0A/μS.
○ Frequency from 50Hz to 10KHz.
● DC output voltage will stay within regulation of +5/- 8% during the step load
changes(+12V Capacitive Load 6600uF)
+3.3V and +5V: 35% of full load
Power Excursion
% of PSU
Time for
Power
Time
Constant
Duty Cycle
100%
Infinite --- ---
120%
100ms 100ms
25%
160%
10ms 30ms
12.5%
180%
1ms 4ms
8%
200% 100us 900us
5%
2.3.1. PWR_OK (Power Good Signal)
PWR_OK is a “power good” signal. It will be asserted high by the power supply
to indicate that the +5V output is above the under voltage threshold listed in
Table 2. of Section 2.2. PWR_OK will be de-asserted to a low state when +5V
output voltage falls below under voltage threshold, or when AC power has been
removed for a time sufficiently such that power supply operation cannot work
normally. The electrical and timing characteristics of the PWR_OK signal are
given in Table 9. and in figure 1.
2.3.2. PS_ON (DC Soft Start)
PS_ON# is an active-low, TTL-compatible signal that allows a motherboard to
remotely control the power supply in conjunction with features such as soft
on/off, Wake on LAN*, or wake-on-modem. When PS_ON# is pulled to TTL low,
the power supply should turn on the four main DC output rails: +12 VDC, +5
VDC, +3.3 VDC, and -12 VDC. When PS_ON# is pulled to TTL high or
open-circuited, the DC output rails should not deliver current and should be
held at zero potential with respect to ground. PS_ON# has no effect on the
+5VSB output, which is always enabled whenever the AC power is present.
Table 10 lists PS_ON signal characteristics.
06
Parameter Description Value
Required Recommended for
Non-Alternative Sleep Mode1
Recommended for
Alternative Sleep Mode
T0 AC power on time <2s
T1 Power-on time < 150ms < 200ms < 150ms
T2 Rise time 0.2 – 20 ms
T3 PWR_OK delay 100 – 150 ms 100 – 250 ms 100 – 150 ms
T4 PWR_OK rise time ≤ 10 ms
T5+T6 Hold up time ≥ 17 ms 80% Load
T6 PWR_OK inactive to
DC loss delay
≥ 1 ms
Signal type +5V TTL compatible
Logic level low
< 0.4 V while sinking 4 mA
Logic level high
Between 2.4 V and 5 V output while sourcing 200 μA
High-state output impedance
1 kΩ from output to common
Max Ripple/Noise 400 mV p-p
Table 9. PWR_OK Signal Characteristics
Min Max
V
IL
, Input Low Voltage 0.0V 0.8V
I
IL
, Input Low Current (Vin = 0.4V) -1.6mA
V
IH
, Input high Voltage (lin = -200uA) 2.0V
V
IH
, open circuit, lin =0 -5.25V
Ripple/Noise 400 mV p-p
Table 10. PS_ON Signal Characteristics
07
2.3.3. +5Vsb (Standby Voltage Output)
+5Vsb is a standby voltage output that is active whenever the AC power is
present. It provides a power source for circuits that must remain operational
when the four main DC output rails are in a disabled state. Example uses
include soft power control, Wake on LAN, wake on modem, intrusion detection,
or suspend state activities. There is over current protection on the +5Vsb
output to ensure the power supply will not be damaged if external circuits draw
more current than the supply can provide.
2.3.4. Power-on Time
The power-on time is defined as the time from when PS_ON is pulled low to
when the12V1, +5V, and +3.3V output are within the regulation ranges speci-
fied in Section 2.2.1. The power-on time will be less than 150ms (T1 <150 ms).
+5Vsb has a power on time of two second max. after the valid AC Voltages
applied.
2.3.5. Rise Time
The output voltage rise from ≤ 10% of nominal to within the regulation ranges
specified in section 2.2.1 within 0.1 ms to 20 ms (0.1 ms ≤ T2 ≤ 20 ms)
2.3.6. Power Sequencing
The +12V1 and +5V output levels are equal to or greater than the +3.3V output
at all times during power-up and normal operation. The time between the
+12V1 or +5V output reaching its minimum in-regulation level and +3.3V
reaching its minimum in-regulation level is ≤ 20 msec.
2.3.7. Overshoot at Turn-on / Turn-off
The output voltage overshoot upon the application or removal of the input
voltage, or the assertion / de-assertion of PS_ON will be less than 10% above
the nominal voltage.
2.3.8. Reset after Shutdown
If the power supply latches into a shutdown state because of a fault condition
on its outputs, the power supply can return to normal operation only after the
fault condition has been removed and the PS_ON has been cycled OFF/ON
with a minimum OFF time of 1 second.
2.3.9. +5Vsb at AC Power-down
After AC power is removed, the +5Vsb standby voltage output will remain at its
steady state value for the minimum hold-up time specified in Section 2.2.6 until
the output begins to decrease in voltage. The decrease can be monotonic in
nature, dropping to 0.0V. There are no other perturbations of this voltage at or
following removal of AC power.
2.4. Output Protection
2.4.1. Over Voltage Protection
2.4.2. Under Voltage Protection
2.4.3. Over Current Protection
The power supply can provide latch-mode over voltage protection as defined in
Table 11.
The power supply can provide latch-mode Under voltage protection as defined
in Table 12.
The power supply can provide Over Current Protection as defined in Table 13.
2.4.4. Short-circuit Protection
2.4.5. Over Power Protection
Fold back at 110%~150% over peak load
2.4.6. OVER TEMPERATURE PROTECTION
>55 degree Celsius ambient at full load <70 degree Celsius ambient at 100Vac
full load. Latch off protection with AC line or PWR_ON reset.
The power supply will shut down and latch off for shorting the +12V, +5V,
+3.3V, and -12V rails to return or any other rails. Shorts between main output
rails and +5Vsb will not cause any damage to power supply. +5Vsb can be
capable of being shorted indefinitely, but when the short is removed, the power
supply will recover automatically or by cycling PS_ON. The power supply can
be capable of withstanding a continuous short circuit to the output without
damage or overstress to the unit under the input conditions specified in section
2.1.
08
Output Min. Nom. Max. Unit
+12VDC 13.3 14.6 15.6 Volts
+5VDC 5.5 6.25 7.0 Volts
+3.3VDC 3.7 4.1 4.7 Volts
Table 11. Over Voltage Protection
Output Min. Nom. Max. Unit
+12VDC 8.80 9.30 9.80 Volts
+5VDC 4.10 4.30 4.47 Volts
+3.3VDC 2.5 2.69 2.83 Volts
Table 12. Under Voltage Protection
Output Min. Max.
+12V1DC 115% 150%
+5VDC 30A 50A
+3.3VDC 35A 55A
09
2.4.7. No-load Operation
No damage or hazardous condition will occur with all the DC output connectors
disconnected from the load. The power supply may latch into the shutdown
state.
2.4.8. Isolation (High Voltage Withstand)
1800Vac for 1 minute
3. Environmental
4. Electromagnetic Compatibility
The following subsections define recommended environmental specifications
and test parameters. Based on the typical conditions to which an ATX12V
power supply may be subjected during operation or shipment.
3.1. Temperature
3.3. Altitude
3.2. Humidity
Operating 0°C to +50°C
Non-operating -20°C to +70°C
Operating 20% to 90% relative humidity (non-condensing)
Non-operating 5% to 95% relative humidity (non-condensing)
The following subsections outline applicable product regulatory specifications for
this power supply.
The power supply can comply with FCC Part 15 and EN55032: 2015 meeting
Class B for both conducted and radiated emissions with a 3 dB margin.
Operating 0 to 10,000 feet
Storage 0 to 50,000 feet
4.2. Immunity (Meet)
4.1. Emissions (Meet)
The power supply can comply with EN 55035: 2017.
4.3. CE Testing (Meet)
5.1. Component De-rating
5. Reliability
6. Safety (Meet)
The following standards are applied during the CE testing
EN 55032: 2015 Class B with 3dB margin minimum
EN 61000-3-2: 2014 Harmonic Current Measurement
EN 61000-3-3: 2013 Voltage Fluctuation and Flick Measurement
EN 55035: 2017, including
IEC 61000-4-2: 2009 ESD – air discharge 8kV / ESD contact discharge 4kV
IEC 61000-4-3: 2010 Radiated, Radio Frequency Electromagnetic Field
mmunity Test
IEC 61000-4-4: 2012 Electrical Fast Transient/Burst Immunity Test
IEC 61000-4-5: 2014 Surge Immunity Test – 2kV L/N to PE and 1kV L to N
IEC 61000-4-6: 2014 Immunity to Conducted Disturbances Induced by
RF Fields
IEC 61000-4-8: 2010 Power Frequency Magnetic Field Immunity Test
IEC 61000-4-11: 2004 Voltage Dips and Short Interruptions Immunity Test
The derating process promotes quality and high reliability. All electronic
components are designed with conservative derating for use in commercial and
industrial environments.
The power supply meets the requirements of RoHS & REACH Compliance
specified as followings:
5.2. Mean Time between Failures (MTBF)
100K hours minimum at full load 25°C
6.1. Safety
6.2. RoHS & REACH Compliance
cTUVus UL62368-1
TUV EN 62368-1
CB IEC 62368-1
10
11
● European Directive for Waste of electrical and electronic equipment (WEEE)
2012/19/EU
● European Directive for Restriction of the use of certain hazardous substances
in electrical and electronic equipment (RoHS) 2011/65/EU
● ACPEIP, Administration on the Control of Pollution caused by Electronic
Information Products (China RoHS), e.g. SJ/T 11363-2006 Requirements for
Concentration Limits for Certain Hazardous Substances in EIP, SJ/T 11364-2006
Marking for Control of Pollution Caused by EIP
● Plastic and rubber parts are within the limits for 16 PAH and Benzopyrene
polycyclic aromatic hydrocarbons
- PAH (Polycyclic Aromatic Hydrocarbons):
- 200mg/kg for components touched less than 30 seconds
- 10mg/kg for components touched longer than 30 seconds
- Benzopyrene are within the limits of:
- 20mg/kg for components touched less than 30 seconds
- 1mg/kg for components touched longer than 30 seconds
● Phthalate concentration is below 1000mg/kg for:
- Diisononyl phthalate - Diisodecyl phthalate
- Bis(2-ethylhexyl)phthalate - Butyl benzyl phthalate
- Di-n-octyl phthalate - Bis(n-butyl)phthalate
● Polychlorinated biphenyl (PCB) concentration limits are less than two (2) parts
per million (ppm).
Regulation (EC) No 1907/2006 ... concerning the Registration, Evaluation, Autho-
rization and Restriction of Chemicals (REACH): No substance of Very High
Concern of the “Candidate List” exceeds more than 0,1 % of the global weight of
the delivered item (without packaging of the item)
7. Mechanical
Dimension W*L*H=100x190x70mm
8. Power Supply Connector Overuse Definition
Definition einer Überlastung des
Netzanschlusses
DE
Définition de l'utilisation excessive du
connecteur d'alimentation électrique
FR
Definizione di uso eccessivo del connettore
di alimentazione
IT
Definición de uso excesivo del conector de
la Fuente de alimentación
ES
Определение чрезмерной нагрузки на
коннектор блока питания
RU
電力供給コネクタの使用限度超過に関する説明
JP
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CN
䳏⑤կឝ఼丁䘢ᑺՓ⫼ᅮ㕽
TW
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TH
전원 공급 커넥터 과용 정의
KR
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Openings that do not exceed 1mm in width regardless of length
Openings that do not exceed 5mm in any dimension
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This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired operation.
Please refer to SilverStone website for latest specifications updates.
The equipment a Class | Switching Power Supply intended to use
for information technology equipment or Audio and Video equipment.
※付属の電源コードは当該製品専用です。他の機器に使用しないでください。
Model (safety certification):SST-2U0750FCGD-A
SST-2U0850FCGD-A
SST-2U750R-GF / SST-2U850R-GF
G11255890
