This post explains for the diode.

The Part Number is FDH300.

The function of this semiconductor is High Conductance Low Leakage Diode.

The package is DO-204AH Type

Manufacturer: Fairchild Semiconductor

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Description

FDH300 is 150V, 0.2A, High Conductance Low Leakage Diode. A “low leakage diode” is a type of diode that is designed to minimize or reduce the amount of reverse current (leakage current) that flows when the diode is in the reverse-biased state. Leakage current is the small amount of current that can flow from the cathode to the anode of a diode when it is supposed to be blocking current in the reverse direction.

Ordering Informations :

1. FDH300TR FDH300 DO-204AH (DO-35) Tape and Reel

2. FDH300A FDH300A DO-204AH (DO-35) Bulk

3. FDH300ATR FDH300A DO-204AH (DO-35) Tape and Reel

4. FDH333 FDH333 DO-204AH (DO-35) Bulk

5. FDH333TR FDH333 DO-204AH (DO-35) Tape and Reel

6. FDLL300A WHITE SOD-80 2L Tape and Reel

7. FDLL333 WHITE SOD-80 2L Tape and Ree

 

Absolute Maximum Ratings

1. Working Inverse Voltage : WIV = 125 V

2. Breakdown Voltage (IR = 100 μA) : VR = 150 V

3. Average Rectified Forward Current : IO = 200 mA

4. DC Forward Current : IF = 500 mA

5. Recurrent Peak Forward Current : if = 600 mA

FDH300 PDF Datasheet

Part Number: SB5B0S

Function: 5A, 100V, SCHOTTKY BARRIER RECTIFIER,  DIODE

Package: Axial Type, DO-201AD

Manufacturer: EIC discrete Semiconductors ( www.eicsemi.com )

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Description

SB5B0S is 5A, 100V, Diode, Rectifier. The Schottky Barrier Diode (SBD) is formed by the junction of a metal contact and a semiconductor material, typically silicon or gallium arsenide. Unlike a p-n junction diode, which uses a p-type and an n-type semiconductor material, the SBD uses a metal and a semiconductor material. The metal is chosen for its low work function, which results in a small barrier height at the metal-semiconductor interface, allowing for efficient carrier injection.

The main advantage of an SBD is its fast switching speed and low forward voltage drop, which makes it ideal for high-frequency and high-speed applications. However, SBDs have a relatively low reverse voltage rating compared to p-n junction diodes and can suffer from thermal instability due to the metal-semiconductor interface.

Features

1. High current capability

2. High surge current capability

3. High reliability

4. High efficiency

5. Low power loss

6. Low cost

7. Low forward voltage drop

8. Pb / RoHS Free

 

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Mechanical Data :

1. Case : D2A Molded plastic

2. Epoxy : UL94V-O rate flame retardant

3. Lead : Axial lead solderable per MIL-STD-202, Method 208 guaranteed

4. Polarity : Color band denotes cathode end

5. Mounting position : Any

6. Weight : 0.645 gram

 

SB5B0S PDF Datasheet