Diodes Incorporated BSP75GQTC

Overview

BSP75GQTC from Diodes Incorporated is a self-protected low-side IntelliFET® MOSFET switch rated for 60V drain-source voltage, 550 mΩ R_DS(ON) at V_IN = 5V, and 1.4A nominal load current. It integrates monolithic overtemperature, overcurrent, active overvoltage clamping (V_DS(AZ) = 60–75V), ESD (4 kV HBM), and load dump (80V) protection. Designed for automotive-grade DC power switching, it replaces electromechanical relays in 12V/24V lamp and motor control.

For engineers reviewing the BSP75GQTC datasheet, BSP75GQTC pinout, BSP75GQTC application, or BSP75GQTC equivalent, key selection criteria include its AEC-Q101 qualification, thermal shutdown with auto-restart, linear-mode current limiting (ID(LIM) = 0.7–1.75A at VIN = 5V), SOT223 package thermal resistance (R_θJA = 24°C/W with copper), and logic-level input compatibility down to 1V threshold.

Technical Context

The BSP75GQTC operates as a protected low-side switch with integrated fault management: overcurrent protection activates when V_DS > 5V and limits I_D to 1.1A (typ.) at 5V input; active clamp triggers at V_DS(AZ) = 60–75V to suppress inductive kickback. Its thermal shutdown trips at T_J = +150°C with +10°C hysteresis and auto-restarts after cooldown.

It supports μC-compatible drive with V_IN(TH) = 1–2.1V and I_IN = 0.7–7mA across 5–10V input range. The device sustains unclamped inductive energy up to 550 mJ at 25°C and 200 mJ at 150°C, enabling robust operation in motor and solenoid loads where flyback transients occur.

Key Specifications

Pinout & Package

Package: SOT223 (Type DN), surface-mount, lead-free, RoHS-compliant. Tab is internally connected to Drain and must be electrically isolated from Source; large copper pour on tab improves thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side protected MOSFET switch applications.

Compared with BTS716G and NCV8460A, the BSP75GQTC delivers superior inductive energy handling (550 mJ), integrated 80V load dump protection, and linear-mode operation - making it optimal for automotive lamp/motor control where transient resilience and analog current control are essential.

Availability

BSP75GQTC is available at Aetrix Electronics and suitable for automotive lamp control, DC motor starter circuits, industrial solenoid valve drivers, and smart relay replacement modules requiring stable component supply, AEC-Q101 compliance, and long-term lifecycle support.

Supply support for BSP75GQTC 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, manufacturing, and sales operations across Asia, Europe, and North America.

The BSP75GQTC belongs to Diodes' IntelliFET® family of protected power switches, engineered specifically for automotive and industrial DC load control where reliability, fault resilience, and simplified system design are critical.

FAQ

What is the maximum continuous current the BSP75GQTC can deliver in a typical automotive PCB layout?

The BSP75GQTC delivers 1.4A continuous current when mounted on a 37 mm × 37 mm × 1.6 mm FR-4 board with 2 oz copper on one side. This rating assumes ambient temperature ≤85°C and relies on the tab's thermal connection to the copper pour. Without adequate copper area, current must be reduced to maintain T_J ≤150°C based on R_θJA = 208°C/W (minimum copper case).

Does the BSP75GQTC require an external freewheeling diode when driving inductive loads?

No external freewheeling diode is required. The BSP75GQTC integrates a body diode with V_SD ≤ 1V at −I_D = 1.4A and provides active overvoltage clamping (V_DS(AZ) = 60–75V) to safely dissipate inductive energy. Its 550 mJ E_AS rating confirms robustness against single-pulse flyback events without external components.

How does the thermal shutdown and auto-restart behavior function during sustained overload?

When junction temperature reaches +150°C, the device shuts off and remains latched off until T_J drops by ≥10°C (hysteresis). It then automatically restarts. During repetitive short-circuits, this cycling limits average power dissipation and prevents permanent damage - but continuous operation in this mode is not recommended; thermal design must ensure steady-state T_J stays below trip point.

Can the BSP75GQTC be used with 3.3V microcontroller GPIOs without level shifting?

Yes. With V_IN(TH) = 1–2.1V (min/max), the BSP75GQTC reliably turns on using 3.3V logic. Input current is only 0.7–1.2 mA at 5V, so standard MCU GPIOs can drive it directly. No series resistor or level shifter is needed, though layout should minimize gate trace inductance to avoid oscillation during fast switching.