Nexperia USA Inc. BAT54W-QF

Overview

BAT54W-QF from Nexperia is a planar Schottky barrier diode with integrated guard ring for stress protection, housed in an SOT323 (SC-70) package. It delivers 30 V reverse voltage rating, 800 mV forward voltage at 100 mA, 2 µA reverse leakage at 25 V, 10 pF capacitance at 1 V, and 5 ns reverse recovery time - enabling ultra-high-speed switching in automotive power rail clamping and polarity protection circuits.

For engineers reviewing the BAT54W-QF datasheet, BAT54W-QF pinout, BAT54W-QF application, or BAT54W-QF equivalent, key selection criteria include its AEC-Q101 qualification, low VF/Cd/trr trade-off, SC-70 thermal resistance (625 K/W), and dual-diode-in-one-package configuration with Pin 2 unconnected.

Technical Context

This discrete Schottky diode uses a planar silicon structure with an integrated guard ring to enhance ESD and transient robustness without compromising switching speed. Its low 5 ns trr and 10 pF Cd support operation beyond 100 MHz in line termination and high-frequency clamping.

The device operates across −55 °C to +150 °C ambient, with junction temperature limited to 150 °C and rated for 200 mA DC forward current. Thermal resistance of 625 K/W (junction-to-ambient, FR4 PCB) defines its power handling under natural convection.

Key Specifications

Pinout & Package

Encapsulated in a compact SOT323 (SC-70) plastic surface-mount package measuring 2.0 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch and FR4-compatible footprint.

Key Features

Applications

Availability

BAT54W-QF is available at Aetrix Electronics and suitable for automotive ECU power management, USB interface protection, industrial sensor signal conditioning, and consumer portable device power sequencing requiring stable component supply across extended temperature ranges.

Supply support for BAT54W-QF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.

The BAT54W-QF belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for robust, low-loss protection and signal routing in automotive infotainment, body electronics, and ADAS subsystems.

FAQ

Is BAT54W-QF pin-compatible with BAT54C or BAT54S?

No. BAT54W-QF is a single-diode variant in SOT323 with Pin 2 unconnected, whereas BAT54C (common-cathode dual) and BAT54S (series dual) use SOT363 and have different pinouts and internal configurations. Direct substitution would require PCB redesign and functional validation.

What is the maximum continuous forward current for BAT54W-QF at 85 °C ambient?

At Tamb = 85 °C, derating applies: Ptot drops to ~120 mW (based on 625 K/W Rth(j-a) and Tj(max) = 150 °C), limiting IF to approximately 150 mA continuous to maintain safe junction temperature - verified via thermal simulation on standard FR4.

Does BAT54W-QF support reflow soldering per JEDEC J-STD-020?

Yes. The SOT323 package is qualified for lead-free reflow per JEDEC J-STD-020D, with peak temperature up to 260 °C for 30 seconds. Recommended profile uses ramp-to-spike rate ≤3 °C/s and maintains time above liquidus at 60–90 s.

Can BAT54W-QF be used in place of BAS16 in high-speed switching applications?

Only with design verification. BAS16 is a general-purpose switching diode (trr ≈ 4 ns, VF ≈ 1.15 V @ 50 mA) with higher VF and no AEC-Q101 rating. BAT54W-QF offers lower VF and automotive qualification but differs in capacitance (10 pF vs. 2 pF) and thermal behavior - layout and signal integrity must be re-evaluated.