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TIP121 on a board, in 3D

TIP121

onsemi

1000 2.5V 200uA 2W 4V 5A 5V 80V NPN TO-220AB Darlington Transistors ROHS

Extended
DatasheetJLCPCBLCSConsemi/TIP121
Category
Darlington Transistors
Package
TO-220AB
Pins
5

Overview

The TIP121 is a darlington Transistor made by onsemi in a TO-220AB package with 3 pins. 1000 2.5V 200uA 2W 4V 5A 5V 80V NPN TO-220AB Darlington Transistors ROHS.

PCBKit's library has its KiCad symbol (Transistor_BJT:TIP121, from KiCad's library) and its footprint (Package_TO_SOT_THT:TO-220-3_Vertical, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C4366031).

Symbol

123
Transistor_BJT:TIP121From KiCad's library

Footprint

123
Package_TO_SOT_THT:TO-220-3_VerticalFrom KiCad's library

Parameters

9
Collector - Emitter Voltage VCEO
80V
Current - Collector Cutoff
200uA
Current - Collector(Ic)
5A
DC Current Gain
1000
Emitter-Base Voltage VEBO
5V
Pd - Power Dissipation
2W
Type
NPN
Vbe On(VBE(on))
2.5V
Vce Saturation(VCE(sat))
4V

Order codes

1

Pinout

3
The pins of the TIP121
PinNameType
1BInput
2CPassive
3EPassive

Show this part on your page

A live frame, for any web page
<iframe src="https://pcbkit.io/embed/parts/onsemi/TIP121" title="TIP121 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>
A picture
<img src="https://pcbkit.io/embed/parts/onsemi/TIP121.jpg" alt="TIP121" width="1200" height="900">
A picture that opens the part, for a README
[![TIP121](https://pcbkit.io/embed/parts/onsemi/TIP121.jpg?size=s)](https://pcbkit.io/parts/onsemi/TIP121)

Questions

Is there a KiCad symbol and footprint for the TIP121?

Yes. The symbol is Transistor_BJT:TIP121 and the footprint Package_TO_SOT_THT:TO-220-3_Vertical, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the TIP121?

TO-220AB, with 3 pins. Its footprint is drawn on this page.

Where is the TIP121 datasheet?

onsemi publishes it: the Datasheet link on this page opens it.

Where can I order the TIP121?

JLCPCB lists it as part C4366031, with 0 in stock; the sellers' links on this page open their listings.

What can replace the TIP121?

Parts like it in the library: the TIP122 by STMicroelectronics, the TIP127 by Jiangsu Changjing Electronics Technology (CJ), the TIP127 by STMicroelectronics and the BDW94C by STMicroelectronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

8