Build with BAT54S — Datasheet Specs & AI Design Help

00 — Overview

What the BAT54S does

The BAT54SLT1G and SBAT54SLT1G are dual series Schottky barrier diodes designed for high speed switching, circuit protection, and voltage clamping. These devices feature a 30 V reverse breakdown voltage, 7.6 pF total capacitance, and a typical forward voltage of 0.35 V at 10 mA. They handle up to 200 mA of continuous forward current and switch in under 5 ns. The parts operate across a junction temperature range of -55 to 150 °C. Their extremely low forward voltage reduces conduction loss, making them ideal for portable applications with limited space. The dual package supports automotive and industrial requirements while remaining RoHS compliant.

Next step

Start building with BAT54S → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for BAT54S
Parameter	Min	Typ	Max	Conditions	Source
forward voltage	—	220 mV	240 mV	ORDERING INFORMATION	onsemi datasheet, p. 2 — ORDERING INFORMATION
operating temperature	-55 °C	—	150 °C	Junction Temperature	onsemi datasheet, p. 1 — Features
reverse voltage	—	—	30 V	vr; Features	onsemi datasheet, p. 1 — Features
forward current	—	200 mA	—		onsemi datasheet, p. 1 — Features
reverse leakage current	—	500 nA	2 µA	ORDERING INFORMATION	onsemi datasheet, p. 2 — ORDERING INFORMATION
rectified current	—	200 mA	—	Forward Current (DC), Max	onsemi datasheet, p. 1 — Features
clamping voltage	—	800 mV	—	Forward Voltage, IF = 100 mAdc, Max	onsemi datasheet, p. 2 — ORDERING INFORMATION
peak pulse current	—	1 A	—	Non-Repetitive Peak Forward Current, square pulse = 1 sec	onsemi datasheet, p. 1 — Features
junction capacitance	—	7.6 pF	—	Total Capacitance, VR = 1.0 V, f = 1.0 MHz, Typ	onsemi datasheet, p. 2 — ORDERING INFORMATION
reverse recovery time	—	—	5 ns	(rec); ORDERING INFORMATION	onsemi datasheet, p. 2 — ORDERING INFORMATION

02 — Alternatives

Closest matches to BAT54S

BAT54HT1 1.5× higher forward current, similar forward voltage, similar junction capacitance

BAT54T1G 1.5× higher forward current, 1.4× lower operating temperature, similar forward voltage

BAS40X 2.6× higher operating temperature, 2.5× lower reverse leakage current, 1.9× lower junction capacitance

BAT54SW 4.0× higher reverse leakage current, 3.6× higher forward voltage, 1.3× higher junction capacitance

BAT54WS 4.5× higher forward voltage, 4.0× higher reverse leakage current, 2.0× lower rectified current

BAT46X 3.3× higher reverse voltage, 2.6× higher junction capacitance, 1.7× lower reverse leakage current

1N4148W 5.7× higher forward voltage, 3.8× lower junction capacitance, 3.3× higher reverse voltage

1N4148WS 3.8× lower junction capacitance, 3.3× higher peak pulse current, 3.3× higher reverse voltage

03 — FAQ

Frequently asked questions

What is the maximum clamping voltage when the forward current is 100 mAdc?

The maximum clamping voltage is 800 mV.

What is the forward current rating?

The forward current is 200 mA.

What is the forward voltage?

The forward voltage is 220 mV under the ORDERING INFORMATION condition.

What is the typical total capacitance of the BAT54SLT1G at VR = 1.0 V and f = 1.0 MHz?

The typical total capacitance is 7.6 pF.

What is the maximum operating temperature specified for the BAT54SLT1G?

The maximum operating temperature is 150 °C at the Junction Temperature.

What is the Non-Repetitive Peak Forward Current for a square pulse of 1 sec?

The peak pulse current is 1 A.

What is the maximum forward current (DC) for the BAT54SLT1G?

The rectified current is 200 mA.

What is the reverse leakage current of the BAT54SLT1G?

The reverse leakage current is 500 nA under ORDERING INFORMATION conditions.

What is the reverse recovery time (rec) listed in the ordering information?

The reverse recovery time (rec) is 5 ns.

What is the reverse voltage (vr) of the BAT54SLT1G?

The reverse voltage (vr) is 30 V.