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Transistor / Mosfet Finder Tool

MOSFET SETTINGS

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Part Number
Type
(V) Max
(A) Max
Min Gain
Max Gain
Package
Logic Level
(V) Gate Min
(V) Gate Full On
Works With ESP32
Note
2N3986
PNP
30
0.8
40
200
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
2N5401
PNP
150
0.6
40
160
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
A1015
PNP
50
0.15
70
400
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
S8550
PNP
25
0.7
85
300
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
S9012
PNP
40
0.8
64
400
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
S9013
PNP
40
0.5
64
250
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
S9015
PNP
45
0.1
85
300
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC327
PNP
45
0.8
100
630
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC556
PNP
65
0.1
110
800
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC557
PNP
45
0.1
110
800
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC558
PNP
30
0.1
110
800
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
2N2222
NPN
40
0.8
100
300
TO-18
5V
Yes
Fully switches with 3.3V or 5V logic levels
2N3904
NPN
40
0.2
100
300
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
2N5551
NPN
160
0.6
40
300
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
C1815
NPN
50
0.15
70
700
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
C945
NPN
50
0.15
70
700
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
S8050
NPN
40
0.5
40
300
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
S9014
NPN
50
0.1
64
400
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC337
NPN
45
0.8
100
630
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC517
NPN
50
0.5
5000
30000
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC547
NPN
45
0.1
110
800
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC548
NPN
30
0.1
110
800
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC549
NPN
30
0.1
110
800
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
BC550
NPN
45
0.1
110
800
TO-92
5V
Yes
Fully switches with 3.3V or 5V logic levels
IRF540N
N-MOSFET
100
33
TO-220
Not Logic-Level
2
10
No
Requires gate driver or 10V+ to fully switch
IRLZ44N
N-MOSFET
55
47
TO-220
3.3V / 5V
1
4.5
Borderline
Works with 5V (Arduino); borderline at 3.3V
2N7000
N-MOSFET
60
0.2
TO-92
3.3V / 5V
2
5
Borderline
Works with 5V (Arduino); borderline at 3.3V
IRFZ44N
N-MOSFET
55
49
TO-220
Not Logic-Level
2
10
No
Requires gate driver or 10V+ to fully switch
IRLB8721
N-MOSFET
30
62
TO-220
3.3V / 5V
1
5
Borderline
Works with 5V (Arduino); borderline at 3.3V

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KEY

Type:

  • PNP - a type of bipolar junction transistor that turns on when its base is pulled low, allowing current to flow from the        ...........emitter to the collector, and is commonly used for high-side switching.

​

  • NPN - a type of BJT that turns on when its base is pulled high, allowing current to flow from the collector to the emitter, ...........and is commonly used for low-side switching.

​

  • N-MOSFET - turns on when its gate is pulled high relative to the source, allowing current to flow from drain to source, and ...........is commonly used for efficient low-side switching.

​

(V) Max: or Maximum Voltage Rating, refers to the highest voltage a component (like a transistor or MOSFET) can safely ...........    withstand across its terminals without breaking down or being damaged.​

(A) Max: or Maximum Current Rating, is the highest continuous current a component (such as a transistor or MOSFET) can ...........    safely conduct without overheating or failing.​

Min Gain: (or Minimum DC Current Gain, often labeled as hFE(min)) refers to the lowest guaranteed ratio of collector current ...........      to base current in a bipolar junction transistor, indicating how effectively the transistor amplifies current under ...........      specified conditions.

Max Gain: (or Maximum DC Current Gain, hFE(max)) represents the highest current amplification ratio a bipolar junction ...........      transistor can achieve under ideal conditions, showing its peak efficiency in amplifying base current to collector ...........      current.

Package:

  • TO-92 - Through-hole, Small, 3-pin plastic case

​

  • TO-18 - Through-hole , very similar to TO-92 but has metal casing, used for higher temperature applications

​

  • TO-220 - Through-hole, Larger with metal tab, can handle more heat

​

(V) Gate Min: minimum gate-to-source voltage (VGS) required to begin turning on a MOSFET and allow current to start flowing ...........            from drain to source.

(V) Gate Max (Full ON): gate-to-source voltage (VGS) at which a MOSFET is considered fully turned on, allowing maximum ...........                             current flow with minimal resistance (lowest Rds).

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