Nexperia USA Inc. BAT854SWF

Overview

BAT854SWF from Nexperia is a 40 V, 200 mA dual Schottky barrier diode in SOT323 (SC-70) package, featuring integrated guard ring for stress protection. It delivers 550 mV forward voltage at 100 mA, 0.5 µA reverse current at 25 V, and 20 pF capacitance at 1 V - optimized for ultra-high-speed switching and low-power handheld protection circuits.

For engineers reviewing the BAT854SWF datasheet, BAT854SWF pinout, BAT854SWF application, or BAT854SWF equivalent, key selection criteria include dual-diode common-cathode/anode configuration, AEC-Q101 qualification, thermal resistance of 625 K/W on FR4, and pulsed reverse current rating under JEDEC conditions.

Technical Context

This dual Schottky diode integrates two independent junctions sharing a common terminal (Pin 3 = K1/A2), enabling compact clamping or steering functions without external interconnect. Its planar structure with guard ring ensures robustness against ESD and transient overstress in automotive and portable systems.

The device operates across −65 °C to +150 °C ambient, with junction temperature limited to 150 °C. Thermal resistance (R_th(j-a)) is specified at 625 K/W on single-sided FR4 PCB - critical for power dissipation planning in space-constrained layouts.

Key Specifications

Pinout & Package

Package: SOT323 (SC-70), 3-lead surface-mount plastic package, 2.0 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual Schottky diode applications.

Compared with NSS40201MR6T1G and SDM100S30, BAT854SWF uniquely combines AEC-Q101 qualification, 40 V/200 mA rating, and 550 mV V_F in SOT323 - making it the sole option for automotive-grade dual-clamp designs requiring full-spec performance in minimal area.

Availability

BAT854SWF is available at Aetrix Electronics and suitable for USB data line protection, automotive CAN bus clamping, and handheld device power OR-ing requiring stable component supply across production lifecycles.

Supply support for BAT854SWF 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 essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

BAT854SWF belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for high-reliability signal integrity and power path protection in space- and power-constrained electronic systems.

FAQ

What is the maximum pulsed forward current rating for BAT854SWF?

The non-repetitive peak forward current (I_FSM) is 1 A for 8.3 ms half-sine wave per JEDEC test method at T_j(init) = 25 °C. This rating applies to short-duration surge events such as ESD-induced current spikes or inductive kickback, not continuous operation.

Is BAT854SWF suitable for bidirectional signal clamping?

Yes - its dual-diode configuration with shared Pin 3 (K1/A2) allows implementation of symmetrical clamping between two rails, such as USB D+/D− to V_CC/GND. The 20 pF capacitance and 550 mV V_F preserve signal rise/fall times up to 120 MHz.

How does the guard ring affect layout requirements?

The integrated guard ring eliminates need for external guard traces or spacing margins around the die. Layout follows standard SOT323 footprint (Fig. 5 in datasheet); no additional keep-out zone beyond the 0.4 mm solder mask expansion is required for stress protection.

Can BAT854SWF replace BAT54 series in existing designs?

Yes - BAT854SWF shares identical SOT323 pinout and electrical specs with BAT54 series but adds AEC-Q101 qualification and tighter V_F distribution. No layout change is needed; verify thermal margin using R_th(j-a) = 625 K/W on your PCB stack-up.