2 layers95.9 × 112.6 mm
Overview
The TIP121 is a darlington Transistor made by STMicroelectronics in a TO-220-3 package with 3 pins. 1000 2.5V 200uA 2W 4V 5A 5V 80V NPN TO-220-3 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. 299 are in stock at JLCPCB (part C315146). 5 open-source boards in 5 repositories on GitHub use it.
Symbol
Footprint
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- TIP121LCSC C315146
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | B | Input |
| 2 | C | Passive |
| 3 | E | Passive |
Open-source boards using it
All 5- 2 layers75 × 50 mm
Aire apollo
makespacemadrid/ApolloVentilator
Nos gustaría ser el Marlin de los ventiladores :)
37 parts6GPL-3.0 - 2 layers96.6 × 100 mm
- 2 layers81.2 × 82.6 mm
- 2 layers65 × 56.5 mm
Flowerweb hat
versarite/Flowerweb
Remote flower watering system with raspberry pi over tailscale net
18 parts
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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-220-3, with 3 pins. Its footprint is drawn on this page.
Where is the TIP121 datasheet?
STMicroelectronics publishes it: the Datasheet link on this page opens it.
Where can I order the TIP121?
JLCPCB lists it as part C315146, with 299 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.
Which open-source boards use the TIP121?
5 boards in 5 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8
TIP122
TO-2201000 100V 2.5V 200uA 5A 5V 65W NPN TO-220 Darlington Transistors ROHSSTMicroelectronicsDarlington TransistorsTIP127
TO-220-55℃~+150℃ 1000 100V 200uA 2W 5A 5V PNP TO-220 Darlington Transistors ROHSJiangsu Changjing Electronics Technology (CJ)Darlington TransistorsTIP127
TO-2201000 100V 2.5V 200uA 2W 4V@5A,20mA 5A 5V PNP TO-220 Darlington Transistors ROHSSTMicroelectronicsDarlington TransistorsBDW94C
TO-220100V 100uA 12A 3V 4V 750 80W PNP TO-220 Darlington Transistors ROHSSTMicroelectronicsDarlington TransistorsTIP120
TO-220-55℃~+150℃ 200uA 2V@3A,12mA 2W 5A 5V 60V NPN TO-220 Darlington Transistors ROHSJiangsu Changjing Electronics Technology (CJ)Darlington TransistorsTIP122
TO-2201000 100V 200uA 2W 4V@5A,20mA 5A 5V NPN TO-220 Darlington Transistors ROHSFoshan Blue Rocket ElecDarlington TransistorsTIP120
TO-2201000 2.5V 200uA 2V@3A,12mA 5A 5V 60V NPN TO-220 Darlington Transistors ROHSSTMicroelectronicsDarlington TransistorsTIP127
TO-2201000 100V 1mA 2W 4V@5A,20mA 5A 5V PNP TO-220 Darlington Transistors ROHSFoshan Blue Rocket ElecDarlington Transistors