Overview
The RF1S9540 is a MOSFET made by Texas Instruments in a I2PAK(TO-262) package with 5 pins. -55℃~+175℃ 1 P-Channel 1.1nF 100V 150W 19A 200mΩ@10V 4V 90nC@10V P-Channel I2PAK(TO-262) MOSFETs.
PCBKit's library has its footprint (EasyEDA_Cloud:TO-262-3_L10.2-W4.6-P2.54-L, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C3278178).
Symbol
The library has no symbol for this part yet.
Footprint
Parts like it
8AUIRFSL4010
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--55℃~+175℃ 1 N-channel 100V 120A 170nC@10V 338W 381pF 4V 5mΩ@10V 660pF 9.9nF N-Channel - MOSFETs ROHSNexperiaMOSFETsPSMN8R5-100ES
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TO-262-55℃~+175℃ 1 N-channel 170nC@10V 210A 300W 360pF 3mΩ@10V 4V 6.54nF 60V 720pF N-Channel TO-262 MOSFETs ROHSInfineon TechnologiesMOSFETs
Questions
Is there a KiCad symbol and footprint for the RF1S9540?
Yes. the footprint EasyEDA_Cloud:TO-262-3_L10.2-W4.6-P2.54-L, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the RF1S9540?
I2PAK(TO-262), with 5 pins. Its footprint is drawn on this page.
Where is the RF1S9540 datasheet?
Texas Instruments publishes it: the Datasheet link on this page opens it.
Where can I order the RF1S9540?
JLCPCB lists it as part C3278178, with 0 in stock; the sellers' links on this page open their listings.
What can replace the RF1S9540?
Parts like it in the library: the AUIRFSL4010 by Infineon Technologies, the PSMN5R0-100ES by Nexperia, the PSMN8R5-100ES by Nexperia and the PSMN8R5-108ES127 by Nexperia. Check their datasheets: a part that fits the footprint may still differ in its ratings.