Todays deals on Schottky Rectifier?

550 PCS FST6230 SCHOTTKY MINIMOD BARRIER RECTIFIER $995.00

2,250 Pieces IR 10WQ045FN 10AMP 45V SCHOTTKY RECTIFIER $900.00

500 PCS IR FST6230 SCHOTTKY MINIMOD BARRIER RECTIFIER $735.00

reel MBRS360T3 smt Schottky Power Rectifier qty:2500 $299.00

32 PIECES IR SCHOTTKY RECTIFIER – 220 AMP 30 VOLT – NEW $320.00

800 PC’S P/N MBRB2545CT Schottky Diodes Rectifiers 30A 45V $244.99

5000 PCS SS14 DO-214AC 1N5819 SMD Schottky Rectifier /FREE registered mail $229.99

150 PCS MBR10100CT B10100G MBR10100 Schottky Rectifiers $227.99

500 PCS 21DQ10 DO-41 SCHOTTKY RECTIFIER $227.99

SR5100 100V 5A Schottky Rectifier Diode SB5100, x1000 $220.00

300PC B360A-13-F DO-214 3.0A SCHOTTKY BARRIER RECTIFIER $213.49

20 PCS STPS6045CW TO-3P STPS6045 POWER SCHOTTKY RECTIFIERS ST/Free Register Mail $203.99

20 PCS STPS4045CW TO-3P STPS4045 POWER SCHOTTKY RECTIFIERS ST/FREE Register Mail $195.99

3000 PCS SS24 DO-214AC Schottky Barrier Rectifier /FREE registered mail $194.99

500 PCS 1N5825 IN5825 5.0A Schottky Rectifier Diodes /FREE Registered Mail $175.99

300 PCS 11DQ06 DO-41 Schottky Rectifier, 1.1 A $157.99

1000 PCS SR5100 5A 100V SCHOTTKY BARRIER RECTIFIERS /FREE Registered Mail $154.99

STPS61H100CW SCHOTTKY Rectifier 100V 30A LOT of 120 $139.00

5000,1N5819 1A 40V Schottky Barrier Rectifier Diode,&23 $138.00

6CWQ06FNTR IRF 60V/7A DPAK SMT DUAL SCHOTTKY RECTIFIER- REEL OF 1948- NEW $108.44

5000x 1N5817 DO-41 IN5817 1.0A SCHOTTKY BARRIER RECTIFIER DIODES/Free Reg.Mail $129.99

STPS12045TV ST POWER SCHOTTKY RECTIFIER 45V 60A ISOTOP x10 $120.00

85HQ045 45V; 85A schottky pow rectifier BY IR LOT OF10 $119.95

2000 PC 1N5822 IN5822 3A 40V SCHOTTKY BARRIER RECTIFIER /Free Registered Mail $118.99

200 PCS SK34 DO-214AC SCHOTTKY BARRIER RECTIFIER /FREE Registered Mail $109.99

150PCS B240 DO-214 2 AMP SMD SCHOTTKY BARRIER RECTIFIER $99.99

Lot of (1120) Taped 1N5820-T, 20V/3A, Schottky Rectifier Diodes $79.99

1N6097 50 Amp Schottky Rectifier LOT OF 10 $99.00

1N5822 3 Amp 40V Schottky Barrier Rectifier,Diode,x1000 $95.00

STMICROELECTRONICS STPS12045 SCHOTTKY RECTIFIERS 8 PCS $70.00

LOT OF 10 SD51 SCHOTTKY RECTIFIER DIODE 60A 45V NEW $79.99

50 PCS STPS41H100CT LOW DROP POWER SCHOTTKY RECTIFIER New ST $74.99

MBR30035CT – 300A 35V Schottky Barrier Rectifier – Motorola $56.00

MOTOROLA SD51 SCHOTTKY BARRIER RECTIFIER DIODE 60A 45V $49.90

IR 220CNQ030 SCHOTTKY RECTIFIER – 220 AMP 30 VOLT – 5 PCS NEW $55.00

100pcs 10SQ045 10A 45V Schottky Rectifiers, Brand New $54.88

1N5819 1A 40V Schottky Barrier Rectifier Diode, x 2500 $53.50

60PCS B360A-13-F DO-214 3.0A SCHOTTKY BARRIER RECTIFIER $53.49

Lot of (2900) SK14-TP, 1A/40V, DO-214AA, Schottky Rectifier Diodes $39.99

100 Amp Schottky Rectifier, Diode, IR 100BGQ015, x10PCS $49.99

50 PCS STPS20L60CT STPS20L60 POWER SCHOTTKY RECTIFIER ST New TO-220 $49.99

1N5711, Schottky Rectifier Diode, 15mA 70V, Qty 500 $47.69

LOT 50 pieces MBR745 SCHOTTKY 7.5A – 45V RECTIFIERS DIODES $40.00

10 pcs STPS40H100CW HIGH VOLTAGE POWER SCHOTTKY RECTIFIER TO-247 New ST $42.99

50HQ045 45V; 60A schottky po rectifier BY IR LOT OF 5 $44.50

10 pcs STPS30H100CW HIGH VOLTAGE POWER SCHOTTKY RECTIFIER TO-247 New ST $39.99

100 PCS 1N5824 IN5824 5.0A Schottky Rectifier Diodes $39.99

100 PCS 1N5825 IN5825 5.0A Schottky Rectifier $39.98

25 PC’S P/N TSR845 8A Schottky Rectifier DO-201AD DIODE $29.99

1 used “INTERNATIONAL RECTIFIER” 163CMQ100 160A 100V Schottky Diode. $32.88

SR5100 100V 5 Amp Schottky Rectifier Diode SB5100, x100 $35.00

Rectifier -50 ea – DIODE SCHOTTKY 45V 20A – 40CTQ045 $25.00

STPS16045TV POWER SCHOTTKY RECTIFIER BLOCK MODULE $24.95

550 PCS SS14 DO-214AC 1N5819 SMD Schottky Rectifier /FREE registered mail $32.99

1000,1N5819 1A 40V Schottky Barrier Rectifier Diode,&23 $31.99

500 PCS 1N5822 IN5822 3A 40V SCHOTTKY BARRIER RECTIFIER NEW $31.99

50 PCS MBRS360 D0-214AB SCHOTTKY BARRIER RECTIFIERS $30.99

LOT 45 pieces MBR745 SCHOTTKY 7.5A – 45V RECTIFIERS DIODES $24.95

3A Schottky Barrier Rectifier SB340-E3 – Lot of 100 $24.75

1000 PCS 1N5817 DO-41 IN5817 1.0A SCHOTTKY BARRIER RECTIFIER DIODES $29.99

50PCS 10SQ045 10A 45V Schottky Diodes, for Solar Panel / Wind, Rectifier, 10AMP $29.99

500 PCS SS14 DO-214AC 1N5819 SMD Schottky Rectifier NEW $29.99

50pcs 10SQ045 10A 45V Schottky Rectifiers, Brand New $29.88

5 pcs MBR30100 Motorola Schottky Barrier Rectifier 100V $19.00

60HQ100 SCHOTTKY RECTIFIER IC $22.33

160 Amp – 100 V Schottky Rectifier – 160CMQ100 $25.95

MBR1045, 10A 45V, Schottky Barrier Rectifier, Qty 40 $25.19

500 PCS 1N5822 IN5822 3A 40V SCHOTTKY BARRIER RECTIFIER $25.00

STMICROELECTRONICS STPS12045 SCHOTTKY RECTIFIERS 2 PCS $21.00

1N6097 50 Amp Schottky Rectifier LOT OF 2 $25.00

SCHOTTKY RECTIFIER 160 Amp 163CMQ100 $15.00

1N5820, 20V, 80A, Schottky Barrier Rectifier, Qty 100 $24.99

50 PCS MURA220T3G DO-214AC MURA220 U5D Surface Mount Schottky Power Rectifier $24.99

10 pcs PBYR2545CT 25A 45V TO-220 SCHOTTKY RECTIFIER $24.99

10 pcs PBYR2545CT 25A 45V TO-220 SCHOTTKY RECTIFIER $24.99

UNITRODE USD345C DUAL POWER SCHOTTKY RECTIFIER 60A 45V $19.90

MBRP3010, 30A 100V, Schottky Barrier Rectifier, Qty 10 $24.29

403CNQ400 2 Terminals Diode Module Schottky Bridge Rectifier 400A 400V $23.21

100 PCS 11DQ06 DO-41 Schottky Rectifier, 1.1 A $22.99

Free Shipping New 100 Pcs x 1N5821 Rectifier Schottky Diode SALE $22.98

1N5834 Switchmode power rectifier schottky diode $17.00

350Pcs 35 Value SMD Transistor Rectifier Switching Schottky Diode Assortment Kit $22.50

1N5711W, Schottky Rectifier Diode SMT 15mA 70V (50) $22.49

1N5711, Schottky Rectifier Diode, 15mA 70V, Qty 200 $22.49

112CNQ030APBF – 112CNQ030 SCHOTTKY RECTIFIER IC $18.32

SD51 SCHOTTKY 60A, 45V RECTIFIER STUD DIODE MSC. $18.84

100 PCS 1N5821 DO-201 IN5821 3A Diodes,3 AMPERE Axial Lead Rectifier Schottky $21.99

100 IN5819T Schottky Barrier Rectifier Diodes $21.99

IR 243NQ080 240A 80V Schottky Rectifier Module $14.99

75 Motorola MBRD1035CTL 10A 35V Schottky Rectifiers $21.99

403CNQ400 Diode Module Schottky Bridge Rectifier 400A 400V $21.63

403CNQ400 2 Terminals Diode Module Schottky Bridge Rectifier 400A 400V $21.62

403CNQ400 Diode Module Schottky Bridge Rectifier 400A 400V $21.62

403CNQ400 2 Terminals Diode Module Schottky Bridge Rectifier 400A 400V $21.60

400A 400V Reverse Battery Protection Schottky Bridge Rectifier 403CNQ400 $21.59

400A 400V Reverse Battery Protection Schottky Bridge Rectifier 403CNQ400 $21.31

403CNQ400 2 Terminals Diode Module Schottky Bridge Rectifier 400A 400V $21.31

400A 400V Reverse Battery Protection Schottky Bridge Rectifier 403CNQ400 $21.29

403CNQ400 Diode Module Schottky Bridge Rectifier 400A 400V $21.28

403CNQ400 2 Terminals Diode Module Schottky Bridge Rectifier 400A 400V $21.22

Schottky Rectifier Questions

ATX Power Supply – The Simplest Way To Repair It

I had stopped repairing ATX power supply many years back due to the new one cost very cheap. It’s not worth to repair it because the spare parts sometimes were much more expensive than getting a new power supply. Searching for ATX power supply spare parts was not easy as many of them you can’t even find them on the internet. Not only that, many complicated and different designed by power supply manufacturers had eaten up our precious troubleshooting time too because of we need time to understand how all these different designed power supply work.

Some of the power supply designs were using the PWM IC (UC3842) and power FET, some use the double transistors while some use only a single power IC in the primary side. Because of the manufacturers wants the design to be made into compact size, many secondary or even primary power supply circuit were build into a modular board (smaller board). This made troubleshooting even more difficult because many times the meter’s probe can’t reach to the testing point.

The real reason why I had stopped repairing ATX power supply was the profit margin. If you charge to high the customers rather buy a new unit with one year warranty given. If you charge too low, you may end up in the losing side because of the components replaced, electricity and etc. If you charge reasonable, the profit margin gained can’t even cover your time spent on troubleshooting it. I’m here not to discourage you to stop repairing ATX power supply, however if you have the time, have contacts getting cheap power supply components, easy to access many power supply schematic diagrams and etc then you may go ahead to repair it.

Okay back to the article, one of my customers had asked me to repair his ATX power supply. I told him to get a new one (since it was very cheap) but he said he couldn’t find one that suits his customer’s CPU. He wanted a power supply that is either same size or smaller then the original one with same or higher specification but all he could find was a standard size power supply!

As a favors to my customer, I would do my best to help him to repair the ATX power supply. When the power supply was switch on, measurements were taken. The results were over voltage. The 12 volts line shot up to 13 + volt and the 5 volts line became 5.6 volts. After the casing was removed, I found the inside was very dirty and I used a vacuum cleaner and a brush to clean off the dirt. Then I saw four filter electrolytic capacitors had bulged at the top casing.

As you know, we as electronic repairers can’t just see things at only one side; we have to see the other sides too. What I mean was, try to see if there are any suspicious components that contributed to the failure of the power supply such as broken components, dry joints, loose connection, decay glue and etc before start checking the suspected area.

What I saw was at the primary side there were some components covered with decayed glue as seen in the picture. I have to carefully remove it by scrapping off the layers of the decayed glue while preserving the outer layers of the components. Once it was done, I clean it with the Thinner solution. Decayed glue could cause serious or intermittent problem in electronic equipment because it can be conductive.

If you repair any ATX power supply, make sure you check the fan too because some power supply failure was due to heat caused by a faulty fan. The purpose of the fan is to suck out all the heat generated by the components inside the power supply. In order for the fan to run smooth, you can service it by using a Philips oil base spray as shown in the photo.

Once the four electrolytic capacitors were replaced and the decayed glue removed, I then have to plug it into a junk motherboard together with a hard disk to test the performance of the ATX power supply and measure all of its output voltages. It seems like the output voltages were back to normal. Once everything is okay I then test it in a working CPU to check for the display.

The reason I test it with a junk motherboard first as a way not to cause my good motherboard to go bad just in case if the output voltages is still very high. Better safe than regret later. By the way you can’t test a power supply without load otherwise it may turned on for a while and then shut down. If you do not have a junk motherboard you can always at least connect a hard drive and a wire jumper to its connector to turn on the ATX power supply.

Do you know that most ATX power supply is using dual schottky barrier rectifiers to convert the ac wave into DC voltages? Even in LCD Monitor power supply, a dual schottky were used in the rectification too. For your information, checking schottky diode is different from checking a normal diode. With analog meter set to X10 K ohms, it should show some leakage reading when doing the reverse bias test. If this component becomes faulty it is very easy to get a replacement, of course you have to get one with the right specification. That’s all for today, hope you enjoy the article and come back more often to check out for any latest repair techniques that I’m going to share to you.

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