

Overview
The BAT41KFILM is a schottky Diode made by STMicroelectronics in a SOD-523 package with 2 pins. 1 Independent 100V 100nA@50V 1A 1V@0.2A 200mA SOD-523 Schottky Diodes ROHS.
PCBKit's library has its KiCad symbol (Diode:BAT41, from KiCad's library) and its footprint (Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal, from KiCad's library), ready for a KiCad board. 38,248 are in stock at JLCPCB (part C73150). 9 open-source boards in 8 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
6- Reverse voltage, most
- 100 V · maximum repetitive peak reverse voltage · p. 2
- Forward current, most
- 200 mA · maximum continuous forward current · p. 2
- Junction, hottest
- 150 °C · maximum 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
- 400 mV · typical at IF = 1 mA, Tj = 25 °C · p. 2
- Forward voltage
- 1 V · max at IF = 200 mA, Tj = 25 °C · p. 2
What it is and has
6- Leakage
- Low leakage current losses · p. 1
- Switching
- Extremely fast switching · p. 1
- Capacitance
- Low capacitance diode · p. 1
- Mounting
- Surface mount device · p. 1
- Flammability
- Epoxy meets UL94, V0 · p. 6
- Package material
- Lead-free packages · p. 6
Specifications
15| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| IF IF | max 200 mA | 1 | |
| VRRM VRRM | max 100 V | 1 | |
| C(typ) C | typ 3 pF | 1 | |
| Tj (max) Tj | max 150 °C | 1 | |
| Repetitive peak reverse voltage VRRM | Tj = 25 °C | max 100 V | 2 |
| Continuous forward current IF | Tj = 25 °C | max 200 mA | 2 |
| Surge non repetitive forward current IFSM | Tj = 25 °C; tp = 10 ms Sinusoidal | max 1 A | 2 |
| Storage temperature range Tstg | min -65 · max 150 °C | 2 | |
| Maximum operating junction temperature Tj | max 150 °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 = 50 V; pulse test: tp = 5 ms, δ < 2 % | max 0.1 uA | 2 |
| Reverse leakage current IR(1) | Tj = 100 °C; VR = 50 V; pulse test: tp = 5 ms, δ < 2 % | max 20 uA | 2 |
| Forward voltage drop VF(2) | Tj = 25 °C; IF = 1 mA; pulse test: tp = 380 us, δ < 2 % | typ 400 · max 450 mV | 2 |
| Forward voltage drop VF(2) | Tj = 25 °C; IF = 200 mA; pulse test: tp = 380 us, δ < 2 % | max 1000 mV | 2 |
| Diode capacitance C | VR = 1 V, F = 1 MHz | typ 3 · max 10 pF | 2 |
Ordering codes, by the datasheet
9- BAT41ZFILM
- SOD-123 · Single diode; tape and reel, base quantity 3000 · p. 11
- BAT41WFILM
- SOT-323 · Single diode; tape and reel, base quantity 3000 · p. 11
- BAT41SWFILM
- SOT-323 · Series diodes; tape and reel, base quantity 3000 · p. 11
- BAT41CWFILM
- SOT-323 · Common cathode; tape and reel, base quantity 3000 · p. 11
- BAT41AWFILM
- SOT-323 · Common anode; tape and reel, base quantity 3000 · p. 11
- BAT41JFILM
- SOD-323 · Single diode; tape and reel, base quantity 3000 · p. 11
- BAT41KFILM
- SOD-523 · Single diode; tape and reel, base quantity 3000 · p. 11
- BAT41-09P6FILM
- SOT-666 · Opposite diodes; tape and reel, base quantity 3000 · p. 11
- BAT41-07P6FILM
- SOT-666 · Parallel diodes; tape and reel, base quantity 3000 · p. 11
Parameters
9- Current - Rectified
- 200mA
- Diode Configuration
- 1 Independent
- Junction Temperature(Max)
- 150℃
- Non-Repetitive Peak Forward Surge Current
- 1A
- Reverse Leakage Current (Ir)
- 100nA@50V
- Thermal Resistance(Junction to Ambient)
- 600℃/W
- Voltage - DC Reverse(Vr)
- 100V
- Voltage - Forward(Vf)
- 400mV
- Voltage - Forward(Vf@If)
- 1V@0.2A
Order codes
1- BAT41KFILMLCSC C73150
Pinout
2| Pin | Name | Type |
|---|---|---|
| 1 | K | Passive |
| 2 | A | Passive |
Open-source boards using it
All 9- 6 layers56 × 56 mm

- 6 layers69.7 × 76.7 mm

Amulet controller
EPFLXplore/XRE_LeggedRobot_HW
PCB designs for Xplore Research's robot dog project
414 parts348Apache-2.0 - 6 layers76.8 × 67 mm

BLDC motor controller
Ricsi1231/BLDC-motor-controller-Hardware---HDI-Desing
EmbedCore motor controller is a high-power brushless motor controller. It was specifically designed to be integrated in Autonomus Mobile Robot wheel actuators. Motor controller can be intagreted to other applications.
383 parts1Apache-2.0 - 4 layers46 × 53 mm

Motor controller
AeroX2/aerox2.github.io
One repository and npm installation builds the workshop at jamesridey.dev and the professional site at cv.jamesridey.dev.
137 parts - 6 layers69.7 × 76.7 mm

Amulet controller
aidanbrzezinski/Prism-test
ΛMULET is a high-power brushless motor controller, compatible with the moteus firmware. It was specifically designed to be integrated in EPFL Xplore's Legged Robot actuators.
414 parts - 4 layers44.2 × 66.5 mm

- 4 layers

- 4 layers

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Is there a KiCad symbol and footprint for the BAT41KFILM?
Yes. The symbol is Diode:BAT41 and the footprint Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the BAT41KFILM?
SOD-523, with 2 pins. Its footprint is drawn on this page.
Where is the BAT41KFILM datasheet?
STMicroelectronics publishes it: the Datasheet link on this page opens it.
Where can I order the BAT41KFILM?
JLCPCB lists it as part C73150, with 38,248 in stock; the sellers' links on this page open their listings.
What can replace the BAT41KFILM?
Parts like it in the library: the BAT46WJ by Nexperia, the BAT46WH by Nexperia, the BAT46WJ-QX by Nexperia and the BAT46WS by TECH PUBLIC. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the BAT41KFILM?
9 boards in 8 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
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