Sharkoon Rebel P20 SFX 850W ATX v3.1 PSU Review

Part Analysis

General Data
Manufacturer (OEM) Sirfa
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x Discharger IC HF81
Inrush Protection 1x NTC Thermistor & Relay
Bridge Rectifier(s)
1x
APFC MOSFETs
1x Infineon IPW60R037P7 (650V, 48A @ 100°C, Rds(on): 0.037Ohm)
APFC Boost Diode
1x Toshiba TRS8E65F (650V, 8A @ 25°C)
Bulk Cap(s)
1x Rubycon (420V, 560uF, 2,000h @ 105°C, MXT)
Main Switchers
2x Wuhan Xinyuan CWS60R099BF (600V, 25A @ 100°C, Rds(on): 0.099Ohm)
APFC Controller
Infineon ICE3PCS01G
Resonant Controller
Champion CU6901VAC
Topology
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 6x Toshiba TPHR8504PL (40V, 150A @ 25°C, Rds(on): 1.4mOhm)
5V & 3.3V DC-DC Converters: 6x Infineon BSC0906NS (30V, 40A @ 100°C, Rds(on): 4.5mOhm)
PWM Controller(s): 1x Upi-Semi UP3861P
Filtering Capacitors Electrolytic:
5x Rubycon (6-10,0000 @ 105°C, ZLH)
3x Rubycon (3-6,0000 @ 105°C, YXG)
Polymer: 14x FPCAP, 1x Rubycon YXG, 7x Nippon Chemicon
Supervisor IC Weltrend WT7527RA (OVD, PGO, UVD)
Micro-Controller / Fan controller STC15W408AS
Fan Model Globe Fan S0921512HHB (92mm, 12V, 0.5A, Fluid Dynamic Bearing Fan)
5VSB
Rectifier
2x Vishay RS1D (140V, 30A @ 150°C)
Standby PWM Controller SI8016HSP8

All Sharkoon SFX units are made by Sirfa/High Power, and this is easy to find by noticing the distinctive design of the primary heat sink. Given the restricted PCB space, the primary heat sink is quite large. The 12V FETs are installed on the solder side of the PCB, close to the main transformer, to minimize energy losses during power transfer. The platform’s design is clean enough, and Sirfa used several vertical boards to save space.

A half-bridge topology and an LLC resonant converter are used on the primary side. On the secondary side, six Toshiba FETs regulate the 12V rail. A pair of VRMs generate the minor rails and receive power from the 12V rail. The build quality is generally high, with FETs provided by known manufacturers, with the only exception of the main ones and capacitors by Japanese brands. The soldering quality is also good. My only objection to this unit’s build quality is the fan, provided by Globe Fan, a manufacturer a little above Yate Loon, among the lowest quality fan manufacturers. Sirfa should use a Hong Hua fan instead or another one with similar quality. According to the official specs, the fan uses at least a fluid dynamic bearing, but the manufacturing quality matters most besides the bearing type.

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One thought on “Sharkoon Rebel P20 SFX 850W ATX v3.1 PSU Review

  1. The transformer’s visual impact is remarkable, but it is the optical effect compared to the size of the power supply. Seeing 1200w from such a small 850w power supply always makes a certain sense.

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