Diodes Incorporated BAT54CT-7

Overview

BAT54CT-7 from Diodes Incorporated is a dual common-cathode Schottky barrier diode in SOT523 package, rated for 30 V peak reverse voltage, 200 mA continuous forward current, and 5.0 ns reverse recovery time. It delivers low forward voltage (240–1000 mV across 0.1–100 mA), low leakage (<2.0 µA at 25 V), and 10 pF junction capacitance at 10 V - optimized for high-speed switching and polarity protection in space-constrained DC-DC converter feedback paths.

For engineers reviewing the BAT54CT-7 datasheet, BAT54CT-7 pinout, BAT54CT-7 application, or BAT54CT-7 equivalent, key selection criteria include its dual common-cathode configuration, ultra-low VF at low IF, thermal resistance of 570 °C/W on FR-4, and compliance with automotive-grade variants (BAT54CTQ) for AEC-Q101 stress testing.

Technical Context

This device integrates two independent Schottky diodes sharing a single cathode terminal, enabling compact dual-path rectification or OR-ing functions without discrete pairing. Its guard-ringed PN junction suppresses ESD transients up to ±8 kV (HBM) while maintaining fast switching via low minority-carrier lifetime.

The SOT523 package imposes strict thermal limits: 220 mW power dissipation and 570 °C/W junction-to-ambient resistance require careful PCB copper area allocation. Operation remains stable from –65 °C to +150 °C, supporting industrial and under-hood automotive environments when paired with appropriate derating per Figure 4.

Key Specifications

Pinout & Package

SOT523 is a 3-terminal ultra-small surface-mount package (1.60 × 1.60 × 0.75 mm) with gull-wing leads, matte tin plating, and UL 94V-0 molded green compound. Moisture sensitivity level is J-STD-020 Level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SBAT54CT-7-F, BAT54CT-7 offers identical performance with standard qualification flow; versus BAT54CW-7-F, it enables simpler OR-ing layouts but cannot substitute in common-anode topologies without redesign.

Availability

BAT54CT-7 is available at Aetrix Electronics and suitable for USB power management, sensor interface protection, high-frequency DC-DC feedback, and automotive body control modules requiring stable component supply across extended temperature ranges and RoHS-compliant manufacturing.

Supply support for BAT54CT-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and Europe, serving industrial, computing, consumer, and automotive markets.

The BAT54 series belongs to Diodes' high-speed Schottky diode product line, engineered specifically for low-voltage, high-efficiency power management and signal integrity applications where fast switching and minimal forward loss are critical.

FAQ

What is the pin configuration of BAT54CT-7 in SOT523?

The BAT54CT-7 uses a 3-pin SOT523 package with Pin 1 as Anode A, Pin 2 as Common Cathode, and Pin 3 as Anode B. This dual common-cathode arrangement is confirmed in the DS30259 Rev. 17 datasheet Figure "SOT523 Top View" and verified by Diodes' official package outline document.

Does BAT54CT-7 meet AEC-Q101 requirements for automotive use?

No - BAT54CT-7 is not AEC-Q101 qualified. The automotive-compliant variant is BAT54CTQ-7-F, which undergoes additional stress testing per AEC-Q101 Rev. E and is documented in a separate datasheet (DS30259Q). Standard BAT54CT-7 is rated for industrial temperature range only.

How does the guard ring improve ESD robustness in BAT54CT-7?

The integrated PN junction guard ring surrounds each Schottky anode, providing a controlled lateral current path during ESD events. This structure diverts transient energy away from the sensitive Schottky metallurgical junction, achieving >8 kV HBM ESD rating without external components, as specified in Diodes' internal qualification reports.

Can BAT54CT-7 replace BAT54C in SOT23 packages?

No - BAT54CT-7 (SOT523) is not a direct replacement for BAT54C (SOT23) due to different package dimensions, thermal resistance (570 °C/W vs. ~300 °C/W), and solder pad layout. While electrical specs overlap, mechanical incompatibility requires PCB redesign and requalification of thermal performance.