

Overview
The BAT54KFILM is a schottky Diode made by STMicroelectronics in a SOD-523 package with 2 pins. -40℃~+150℃ 1 Independent 1.25A 1uA@30V 300mA 40V 900mV@100mA SOD-523 Schottky Diodes ROHS.
PCBKit's library has its KiCad symbol (Device:D_Schottky, from KiCad's library) and its footprint (Diode_SMD:D_SOD-523, from KiCad's library), ready for a KiCad board. 9,489 are in stock at JLCPCB (part C283259). 16 open-source boards in 14 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
9- Reverse voltage, most
- 40 V · max repetitive peak reverse voltage · p. 2
- Forward current, most
- 300 mA · max continuous forward current · p. 2
- Junction, hottest
- 150 °C · max operating junction temperature · p. 2
- Junction to air (SOD-523)
- 600 K/W · junction to ambient, epoxy PCB with recommended pad layout · p. 2
- Forward voltage
- 240 mV · max at IF = 0.1 mA, Tj = 25 °C · p. 2
- Forward voltage
- 320 mV · max at IF = 1 mA, Tj = 25 °C · p. 2
- Forward voltage
- 400 mV · max at IF = 10 mA, Tj = 25 °C · p. 2
- Forward voltage
- 500 mV · max at IF = 30 mA, Tj = 25 °C · p. 2
- Forward voltage
- 900 mV · max at IF = 100 mA, Tj = 25 °C · p. 2
What it is and has
4- Losses
- Low conduction and reverse losses · p. 1
- Switching
- Extremely fast switching · p. 1
- Mounting
- Surface mount device · p. 1
- Compliance
- ECOPACK®2 · p. 1
Specifications
16| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Repetitive peak reverse voltage VRRM | Tj = 25 °C | max 40 V | 2 |
| Continuous forward current IF | Tj = 25 °C | max 300 mA | 2 |
| Surge non repetitive forward current IFSM | Tj = 25 °C; tp = 10 ms Sinusoidal | max 1.25 A | 2 |
| Storage temperature range Tstg | min -65 · max 150 °C | 2 | |
| Operating junction temperature range Tj | min -40 · max 150 °C | 2 | |
| Maximum soldering temperature TL | max 260 °C | 2 | |
| Junction to ambient(1) Rth(j-a) | SOD-523; Epoxy printed circuit board with recommended pad layout | max 600 °C/W | 2 |
| Reverse leakage current IR(1) | Tj = 25 °C; VR = 30 V; Pulse test: tp = 5 ms, δ < 2% | max 1 uA | 2 |
| Reverse leakage current IR(1) | Tj = 100 °C; VR = 30 V; Pulse test: tp = 5 ms, δ < 2% | max 100 uA | 2 |
| Forward voltage drop VF(2) | Tj = 25 °C; IF = 0.1 mA; Pulse test: tp = 380 us, δ < 2% | max 240 mV | 2 |
| Forward voltage drop VF(2) | Tj = 25 °C; IF = 1 mA; Pulse test: tp = 380 us, δ < 2% | max 320 mV | 2 |
| Forward voltage drop VF(2) | Tj = 25 °C; IF = 10 mA; Pulse test: tp = 380 us, δ < 2% | max 400 mV | 2 |
| Forward voltage drop VF(2) | Tj = 25 °C; IF = 30 mA; Pulse test: tp = 380 us, δ < 2% | max 500 mV | 2 |
| Forward voltage drop VF(2) | Tj = 25 °C; IF = 100 mA; Pulse test: tp = 380 us, δ < 2% | max 900 mV | 2 |
| Diode capacitance C | VR = 1 V, F = 1 MHz | typ 7 · max 10 pF | 2 |
| Reverse recovery time trr | IF = 10 mA, IR = 10 mA, Tj = 25 °C; Irr = 1 mA, RL = 100 Ω | max 5 ns | 2 |
Ordering codes, by the datasheet
1- BAT54KFILM
- SOD-523 · Marking 86; weight 1.4 mg; base quantity 3000; tape and reel · p. 13
Parameters
10- Current - Rectified
- 300mA
- Diode Configuration
- 1 Independent
- Junction Temperature(Max)
- 150℃
- Non-Repetitive Peak Forward Surge Current
- 1.25A
- Operating Junction Temperature Range
- -40℃~+150℃
- Reverse Leakage Current (Ir)
- 1uA@30V
- Thermal Resistance(Junction to Ambient)
- 600℃/W
- Voltage - DC Reverse(Vr)
- 40V
- Voltage - Forward(Vf)
- 240mV
- Voltage - Forward(Vf@If)
- 900mV@100mA
Order codes
1- BAT54KFILMLCSC C283259
Pinout
2| Pin | Name | Type |
|---|---|---|
| 1 | K | Passive |
| 2 | A | Passive |
Open-source boards using it
All 16- 2 layers20.5 × 8 mm

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- 2 layers100 × 65 mm

- 4 layers110 × 175 mm

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Is there a KiCad symbol and footprint for the BAT54KFILM?
Yes. The symbol is Device:D_Schottky and the footprint Diode_SMD:D_SOD-523, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the BAT54KFILM?
SOD-523, with 2 pins. Its footprint is drawn on this page.
Where is the BAT54KFILM datasheet?
STMicroelectronics publishes it: the Datasheet link on this page opens it.
Where can I order the BAT54KFILM?
JLCPCB lists it as part C283259, with 9,489 in stock; the sellers' links on this page open their listings.
What can replace the BAT54KFILM?
Parts like it in the library: the B5819WT by hongjiacheng, the SD103AWT by hongjiacheng, the B5819WT by GOODWORK and the MSK4005 by Shikues. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the BAT54KFILM?
16 boards in 14 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
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