

Overview
The BAT54WS is a schottky Diode made by Diodes Incorporated in a SOD-323 package with 2 pins. 1 Independent 100mA 1V@100mA 2uA@25V 30V 600mA SOD-323 Schottky Diodes ROHS.
PCBKit's library has its KiCad symbol (Device:D_Schottky, from KiCad's library) and its footprint (Diode_SMD:D_SOD-323, from KiCad's library), ready for a KiCad board. 98,551 are in stock at JLCPCB (part C124205). 66 open-source boards in 51 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
9- Reverse voltage, most
- 30 V · Working peak reverse voltage, max · p. 2
- Forward current, most
- 200 mA · Forward continuous current, max; mounted on FR-4 with recommended pad layout · p. 2
- Junction, hottest
- 150 °C · Junction temperature, max · p. 2
- Junction to air (SOD323)
- 625 K/W · Junction to ambient air; mounted on FR-4 with recommended pad layout · p. 2
- Forward voltage
- 240 mV · Forward voltage, max at IF = 0.1mA · p. 2
- Forward voltage
- 320 mV · Forward voltage, max at IF = 1mA · p. 2
- Forward voltage
- 400 mV · Forward voltage, max at IF = 10mA · p. 2
- Forward voltage
- 500 mV · Forward voltage, max at IF = 30mA · p. 2
- Forward voltage
- 1 V · Forward voltage, max at IF = 100mA · p. 2
What it is and has
5- Switching
- Fast Switching · p. 1
- Protection
- PN Junction Guard Ring for Transient and ESD Protection · p. 1
- Package
- SOD323 · p. 1
- Moisture sensitivity
- Level 1 per J-STD-020 · p. 1
- Polarity marking
- Cathode Band · p. 1
Specifications
20| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Peak Repetitive Reverse Voltage VRRM | TA = +25°C, unless otherwise specified; shared rating with VRWM and VR | max 30 V | 2 |
| Working Peak Reverse Voltage VRWM | TA = +25°C, unless otherwise specified | max 30 V | 2 |
| DC Blocking Voltage VR | TA = +25°C, unless otherwise specified; shared rating with VRRM and VRWM | max 30 V | 2 |
| RMS Reverse Voltage VR(RMS) | TA = +25°C, unless otherwise specified | max 21 V | 2 |
| Average Rectified Forward Current IO | TA = +25°C, unless otherwise specified | max 100 mA | 2 |
| Forward Continuous Current (Note 5) IF | TA = +25°C; mounted on FR-4 PC board with recommended pad layout | max 200 mA | 2 |
| Repetitive Peak Forward Current (Note 5) IFRM | TA = +25°C; mounted on FR-4 PC board with recommended pad layout | max 300 mA | 2 |
| Forward Surge Current (Note 5) IFSM | TA = +25°C; t < 1.0s; mounted on FR-4 PC board with recommended pad layout | max 600 mA | 2 |
| Power Dissipation (Note 5) PD | Mounted on FR-4 PC board with recommended pad layout | max 200 mW | 2 |
| Thermal Resistance, Junction to Ambient Air (Note 5) RJA | SOD323; mounted on FR-4 PC board with recommended pad layout | max 625 C/W | 2 |
| Operating and Storage Temperature Range (Note 7) TJ, TSTG | Note 7 | min -65 · max 150 C | 2 |
| Reverse Breakdown Voltage (Note 6) V(BR)R | TA = +25°C; IR = 100uA; short duration pulse test | min 30 V | 2 |
| Forward Voltage VFM | TA = +25°C; IF = 0.1mA | max 240 mV | 2 |
| Forward Voltage VFM | TA = +25°C; IF = 1mA | max 320 mV | 2 |
| Forward Voltage VFM | TA = +25°C; IF = 10mA | max 400 mV | 2 |
| Forward Voltage VFM | TA = +25°C; IF = 30mA | max 500 mV | 2 |
| Forward Voltage VFM | TA = +25°C; IF = 100mA | max 1000 mV | 2 |
| Reverse Leakage Current (Note 6) IRM | TA = +25°C; VR = 25V; short duration pulse test | max 2 uA | 2 |
| Total Capacitance CT | TA = +25°C; VR = 1.0V, f = 1.0MHz | max 10 pF | 2 |
| Reverse Recovery Time tRR | TA = +25°C; IF = 10mA through IR = 10mA to IR = 1.0mA, RL = 100 | max 5 ns | 2 |
Ordering codes, by the datasheet
3- BAT54WS-7-F
- SOD323 · 3000, Tape & Reel · p. 1
- BAT54WSQ-7-F
- SOD323 · Automotive option; 3000, Tape & Reel · p. 1
- BAT54WS-13-F
- SOD323 · 10000, Tape & Reel · p. 1
Parameters
11- Current - Rectified
- 200mA
- Diode Configuration
- 1 Independent
- Junction Temperature(Max)
- 150℃
- Non-Repetitive Peak Forward Surge Current
- 600mA
- Operating Junction Temperature Range
- -65℃~+150℃
- Power Dissipation
- 200mW
- Reverse Leakage Current (Ir)
- 2uA@25V
- Thermal Resistance(Junction to Ambient)
- 625℃/W
- Voltage - DC Reverse(Vr)
- 30V
- Voltage - Forward(Vf)
- 240mV
- Voltage - Forward(Vf@If)
- 1V@100mA
Order codes
1- BAT54WS-7-FLCSC C124205
Pinout
2| Pin | Name | Type |
|---|---|---|
| 1 | K | Passive |
| 2 | A | Passive |
Open-source boards using it
All 66- 4 layers70 × 54 mm

- 4 layers104 × 158 mm

- 2 layers120.5 × 46 mm

Kampela E1
Alzymologist/Kampela
Hardware signer and key storage for Substrate ecosystem
192 parts21GPL-3.0 - 4 layers29.5 × 64.5 mm

Iot esp eth ind
wayri/SPIKE
PCB-focused multiphysics simulation, from board to complete assembly: PI, SI, circuits, thermal, EM/RF and mechanical workflows, with MCAD collaboration and a roadmap toward large-scale coupled assemblies.
150 parts17 - 2 layers38 × 56 mm

- 2 layers100 × 100 mm

Trv
Polski-Zwiazek-Krotkofalowcow/qo-100-transverter
Auxiliary unit for the QO-100 transverter, providing:
259 parts11 - 2 layers78.5 × 46 mm

Kampela G5
Kalapaja/kampela-hardware
Hardware design schematics and supplementary files for Kampela hardware signer
198 parts5GPL-3.0 - 2 layers100 × 64 mm

Ac tester production
EVtivity/evtivity-ev-tester
An open-source, EV-side charging simulator. It emulates an electric vehicle so you can test AC charging stations (EVSE) and CSMS backends on the bench, without a real car.
68 parts3
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Is there a KiCad symbol and footprint for the BAT54WS?
Yes. The symbol is Device:D_Schottky and the footprint Diode_SMD:D_SOD-323, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the BAT54WS?
SOD-323, with 2 pins. Its footprint is drawn on this page.
Where is the BAT54WS datasheet?
Diodes Incorporated publishes it: the Datasheet link on this page opens it.
Where can I order the BAT54WS?
JLCPCB lists it as part C124205, with 98,551 in stock; the sellers' links on this page open their listings.
What can replace the BAT54WS?
Parts like it in the library: the B5819WS by hongjiacheng, the 1N5819WS S4 by JSMSEMI, the SD103AWS by Guangdong Hottech and the SD103AWS by hongjiacheng. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the BAT54WS?
66 boards in 51 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
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