Bipolar Transistors

Clicking on product's category allows you to see Transistors Part Naming Conventions.

Small-Signal Transistor

Example of JEITA-Registered Small-Signal Transistor
Example of JEITA-Registered Small-Signal Transistor

1. Transistor

2. Circuit configuration

  • A： PNP or similar transistor
  • C： NPN or similar transistor

3. JEITA registration number

4. Revision code

5. Package (may be null)
MFV： VESM (SOT-723)
CT： CST3

Example of In-House-Registered Small-Signal Transistor
Example of In-House-Registered Small-Signal Transistor

1. Transistor

2. Circuit configuration

  • A： PNP or similar transistor
  • C： NPN or similar transistor

3. JEITA registration number

4. Revision code

5. Package
FU： USM (SOT-323, SC-70)

Transistor with built-in resistance (BRT)

Example of Transistor with built-in resistance (BRT)
Example of Transistor with built-in resistance (BRT)

1. RN means Toshiba transistor that has a built-in resistance

2. Polarity
This number shows the polarity of a product.
Products are classified into three types, as shown below, by the polarity.

  • 1： NPN (small-signal)
  • 2： PNP (small-signal)
  • 4： PNP + NPN

3. & 5. Package type

4. Serial number
Serial numbers that start from "A1"： Dual
Serial numbers that start from "01"： Single

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