
Overview
The BSR57 is a JFET made by onsemi in a SOT-23-3 package with 3 pins. -55℃~+150℃ 1 N-channel 20mA 250mW 2V 40V 40Ω 5pF N-Channel SOT-23-3 JFETs ROHS.
PCBKit's library has its KiCad symbol (Transistor_FET:BSR57, from KiCad's library) and its footprint (Package_TO_SOT_SMD:SOT-23-3, from KiCad's library), ready for a KiCad board. 1,405 are in stock at JLCPCB (part C890260).
Symbol
Footprint
Parameters
9- Ciss-Input Capacitance
- 5pF
- Drain Current (Idss)
- 20mA
- FET Type
- N-Channel
- Gate-Source Breakdown Voltage (Vgss)
- 40V
- Gate-Source Cutoff Voltage (VGS(off))
- 2V
- Number
- 1 N-channel
- Operating Temperature
- -55℃~+150℃
- Pd - Power Dissipation
- 250mW
- RDS(on)
- 40Ω
Order codes
1- BSR57LCSC C890260
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | D | Passive |
| 2 | S | Passive |
| 3 | G | Input |
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<iframe src="https://pcbkit.io/embed/parts/onsemi/BSR57" title="BSR57 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/onsemi/BSR57.jpg" alt="BSR57" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/BSR57)Questions
Is there a KiCad symbol and footprint for the BSR57?
Yes. The symbol is Transistor_FET:BSR57 and the footprint Package_TO_SOT_SMD:SOT-23-3, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the BSR57?
SOT-23-3, with 3 pins. Its footprint is drawn on this page.
Where is the BSR57 datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the BSR57?
JLCPCB lists it as part C890260, with 1,405 in stock; the sellers' links on this page open their listings.
What can replace the BSR57?
Parts like it in the library: the MMBFJ112 by onsemi, the MMBFJ201 by onsemi, the MMBFJ110 by onsemi and the IF1320ST3TR by InterFET. Check their datasheets: a part that fits the footprint may still differ in its ratings.
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