What is Transistors with internal resistors?

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Latest Updated:12/01/2010
Question:
What is Transistors with internal resistors?
Answer:
(Transistors with internal resistors are named in accordance with Renesas Electronics' original naming format.)
The Orderable Part Number is explained below using the FA1A4M as an example.
Package  Equivalent Circuit + Withstanding Voltage  R1 Resistor (Significant Figure)  R1 Resistor (Index x 10^{n})  R2:R1 Ratio 
F  A1  A  4  M 
Package  Symbol 
SC59  F 
SC62  H 
SC70  G 
SC75  K 
 
Equivalent Circuit (Vceo)  Symbol 
Equivalent circuit A (20 V)  A1 to M1 
Equivalent circuit B (20 V)  N1 to X1 
Equivalent circuit A (25 V)  A1 to M1 
Equivalent circuit B (25 V)  N1 to X1 
Equivalent circuit A (60 V)  A1 to M1 
Equivalent circuit B (60 V)  N1 to X1 
Equivalent circuit C (60 V)  A2 to M2 
Equivalent circuit A (50 V)  A4 to M4 
Equivalent circuit B (50 V)  N4 to X4 
 
Resistance  Symbol 
1.0  A 
1.2  B 
1.5  C 
1.8  E 
2.2  F 
2.7  H 
3.3  J 
3.9  K 
4.7  L 
5.6  M 
6.8  N 
8.2  P 
 
n  Symbol 
1  1 
2  2 
3  3 
4  4 
5  5 
6  6 
 
Ratio  Symbol 
No R1  A 
1/100  E 
1/50  F 
1/20  H 
1/10  J 
1/5  K 
1/2  L 
1  M 
2  N 
5  P 
10  Q 
20  R 
50  S 
100  T 
No R2  Z 

Note: If there is no R1, the 4th and 5th digits indicate R2.
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