Build with BAT54A — Datasheet Specs & AI Design Help

00 — Overview

What the BAT54A does

The BAT54A is a planar Schottky barrier diode featuring an integrated guard ring for stress protection, available in a small SOT23 surface-mounted plastic package. It offers a maximum reverse voltage of 30 V, a typical forward voltage of 800 mV at 100 mA, and a maximum reverse current of 2 µA under pulsed conditions. This component supports junction temperatures up to 150 °C and handles forward currents up to 200 mA. Engineers typically use the BAT54A for ultra high-speed switching, line termination, voltage clamping, and reverse polarity protection in various electronic circuits.

Next step

Start building with BAT54A → 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 BAT54A
Parameter	Min	Typ	Max	Conditions	Source
forward voltage	—	—	800 mV	IF = 100 mA; tp≤ 300 μs; δ ≤ 0.02; pulsed; Tamb = 25 °C; vf; Quick reference data	Nexperia datasheet, p. 1 — Table 1. Quick reference data
reverse voltage	—	—	30 V	vr; Quick reference data	Nexperia datasheet, p. 1 — Table 1. Quick reference data
forward current (abs max)	—	—	200 mA	Tamb = 25 °C; if; Limiting values	Nexperia datasheet, p. 3 — Table 5. Limiting values
reverse leakage current	—	—	2 µA	VR = 25 V; tp≤ 300 μs; δ ≤ 0.02; pulsed; Tamb = 25 °C; ir; Quick reference data	Nexperia datasheet, p. 1 — Table 1. Quick reference data
junction capacitance	—	—	10 pF	VR = 1 V; f = 1 MHz; Tamb = 25 °C; cd; Characteristics	Nexperia datasheet, p. 4 — Table 7. Characteristics
reverse recovery time	—	—	5 ns	IF = 10 mA; IR = 10 mA; IR(meas) = 1 mA; RL = 100 Ω; Tamb = 25 °C; trr; Characteristics	Nexperia datasheet, p. 4 — Table 7. Characteristics

02 — Alternatives

Closest matches to BAT54A

BAT54SW similar forward current, similar forward voltage, similar junction capacitance

BAT54WS 1.5× higher forward current, 1.2× higher forward voltage, similar junction capacitance

BAT54HT1 4.0× lower reverse leakage current, 3.6× lower forward voltage, 1.5× higher forward current

BAT54SLT1G 4.0× lower reverse leakage current, 3.6× lower forward voltage, 1.3× lower junction capacitance

BAT54T1G 4.0× lower reverse leakage current, 3.6× lower forward voltage, 1.5× higher forward current

1N4148W 5.0× lower junction capacitance, 3.3× higher reverse voltage, 1.6× higher forward voltage

1N4148WS 5.0× lower junction capacitance, 3.3× higher peak pulse current, 3.3× higher reverse voltage

1SS226 3.3× higher peak pulse current, 3.3× lower junction capacitance, 2.7× higher reverse voltage

03 — FAQ

Frequently asked questions

What is the maximum forward current for the BAT54A?

The forward current is 200 mA at Tamb = 25 °C; if; Limiting values.

What is the forward voltage of the BAT54A at IF = 100 mA; tp≤ 300 μs; δ ≤ 0.02; pulsed; Tamb = 25 °C?

The forward voltage is 800 mV.

What is the junction capacitance of the BAT54A?

The junction capacitance is 10 pF at VR = 1 V; f = 1 MHz; Tamb = 25 °C; cd; Characteristics.

What is the reverse leakage current of the BAT54A?

The reverse leakage current is 2 µA at VR = 25 V; tp≤ 300 μs; δ ≤ 0.02; pulsed; Tamb = 25 °C; ir; Quick reference data.

What is the reverse recovery time (trr) of the BAT54A under the conditions IF = 10 mA, IR = 10 mA, IR(meas) = 1 mA, RL = 100 Ω, and Tamb = 25 °C?

The reverse recovery time is 5 ns.

What is the reverse voltage (vr) specified in the Quick reference data for the BAT54A?

The reverse voltage (vr) is 30 V.