Build with BAT54 — Datasheet Specs & AI Design Help

00 — Overview

What the BAT54 does

The BAT54HT1x family comprises Schottky barrier diodes designed for high speed switching, circuit protection, and voltage clamping. These devices feature a 30 V reverse voltage rating, 5.0 ns reverse recovery time, and a typical forward voltage of 0.35 V at 10 mA. The series includes the BAT54HT1 and BAT54HT1G variants, available in SOD-323 surface mount packages. Their extremely low forward voltage reduces conduction loss, making them ideal for handheld and portable applications where space is limited. The parts operate across a junction temperature range of -55°C to 150°C and support a total device dissipation of 200 mW on FR-5 boards.

Next step

Start building with BAT54 → 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 BAT54
Parameter	Min	Typ	Max	Conditions	Source
forward voltage	—	290 mV	320 mV	ORDERING INFORMATION	onsemi datasheet, p. 2 — ORDERING INFORMATION
operating temperature	-55 °C	—	150 °C	Junction and Storage Temperature	onsemi datasheet, p. 1 — THERMAL CHARACTERISTICS
reverse voltage	—	—	30 V	vr; Features	onsemi datasheet, p. 1 — Features
forward current	—	—	200 mA	(dc); ORDERING INFORMATION	onsemi datasheet, p. 2 — ORDERING INFORMATION
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. 2 — ORDERING INFORMATION
junction capacitance	—	7.6 pF	—	VR = 1.0 V, f = 1.0 MHz, typical	onsemi datasheet, p. 2 — ORDERING INFORMATION
zener voltage	—	30 V	—	Reverse Breakdown Voltage, IR = 10 μA	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 BAT54

BAT54SLT1G 1.5× lower forward current, similar forward voltage, similar junction capacitance

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

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, 2.0× lower forward 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 DC forward current for the BAT54HT1?

The forward current is 200 mA (dc).

What is the forward voltage of the BAT54HT1?

The forward voltage is 290 mV under ORDERING INFORMATION conditions.

What is the typical junction capacitance of the BAT54HT1 at VR = 1.0 V and f = 1.0 MHz?

The typical junction capacitance is 7.6 pF at VR = 1.0 V and f = 1.0 MHz.

What is the maximum operating temperature for the BAT54HT1 under Junction and Storage Temperature conditions?

The maximum operating temperature is 150 °C.

What is the maximum forward current (DC) for the BAT54HT1?

The rectified current is 200 mA.

What is the reverse leakage current of the BAT54HT1?

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

What is the reverse recovery time of the BAT54HT1?

The reverse recovery time is 5 ns (rec); ORDERING INFORMATION.

What is the reverse voltage (vr) specification for the BAT54HT1?

The reverse voltage (vr) is 30 V.

What is the zener voltage of the BAT54HT1 at a reverse current of 10 μA?

The zener voltage is 30 V at a reverse current of 10 μA.