Diodes Incorporated BSP75GTA

Overview

BSP75GTA from Diodes Incorporated is a self-protected low-side IntelliFET® MOSFET switch rated for 60V V_DS, 550 mΩ R_DS(ON) at V_IN = 5V, and 1.4A nominal load current. It integrates monolithic overtemperature, overcurrent, active overvoltage clamp, and ESD protection, and is designed for μC-compatible 12V/24V DC switching of lamps, motors, and other inductive/resistive loads in automotive and industrial systems.

For engineers reviewing the BSP75GTA datasheet, BSP75GTA pinout, BSP75GTA application, or BSP75GTA equivalent, this page delivers verified electrical parameters, thermal performance limits, protection behavior under fault conditions, and real-world use context for relay replacement and high in-rush load control.

Technical Context

The BSP75GTA operates as a logic-level–driven low-side power switch with integrated protection circuitry that activates only during fault events-such as short-circuit (V_DS(SC) = 36V), overvoltage (clamp up to 75V), or thermal overload (T_JT = +150°C to +175°C). Its current-limiting function deactivates at low V_DS to preserve normal-load conduction.

It features active load-dump protection (V_{LOAD_DUMP} = 80V), human-body-model ESD rating of 4000V, and linear-mode capability enabled by thermal derating rather than fixed current limiting. The device's R_θJA varies from 208°C/W (minimal copper) to 24°C/W (optimized 37mm × 37mm 2oz Cu), directly linking board layout to safe continuous current delivery.

Key Specifications

Pinout & Package

Package: SOT223 (Type DN), surface-mount, thermally enhanced with drain-connected tab requiring electrical isolation from source. Recommended copper pour on PCB improves thermal resistance from 50°C/W to 24°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTS3042SD and VNQ7050AJTR, the BSP75GTA offers superior integration of active overvoltage clamping and ESD protection in a cost-optimized SOT223 package, making it optimal for space-constrained, relay-replacement designs where full diagnostic capability is not required.

Availability

BSP75GTA is available at Aetrix Electronics and suitable for automotive lighting control, industrial motor starters, programmable power outlets, and smart building actuators requiring stable component supply across production lifecycles.

Supply support for BSP75GTA 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, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.

The BSP75GTA belongs to Diodes' IntelliFET® family of protected power switches, engineered specifically for replacing electromechanical relays and discrete MOSFET+protection circuits in 12V/24V DC systems with stringent AEC-Q101 and IATF 16949 compliance requirements.

FAQ

What is the maximum continuous current the BSP75GTA can deliver in a typical PCB layout?

The BSP75GTA delivers up to 1.4A continuously at V_IN = 5V when mounted on a 37mm × 37mm FR-4 board with 2oz copper, limited by its 2.5W power dissipation and 50°C/W thermal resistance. With optimized thermal pads and larger copper areas, current capacity scales with reduced R_θJA down to 24°C/W - enabling ~2.2A before thermal shutdown.

Does the BSP75GTA require an external flyback diode when driving inductive loads?

No external flyback diode is required for standard inductive switching because the BSP75GTA incorporates an integrated body diode with 1V forward voltage and is rated for 550mJ unclamped inductive energy at 25°C. However, for repetitive high-energy transients or elevated ambient temperatures, a parallel Schottky diode may extend reliability beyond datasheet EAS limits.

How does the active overvoltage clamp behave during load dump events?

During load dump (up to 80V per ISO 7637-2), the BSP75GTA's active clamp engages to hold V_DS ≤75V, dissipating excess energy internally. This prevents destructive breakdown and eliminates need for external TVS diodes. Clamp activation is instantaneous and does not rely on external components or timing circuits.

Can the BSP75GTA be used with 3.3V microcontrollers without level shifting?

Yes - the BSP75GTA has a logic-level input with V_IN(TH) of 1.0–2.1V and draws only 0.7–1.2mA at 5V, ensuring robust turn-on from 3.3V GPIOs. Its gate threshold is well below typical 3.3V logic high (≥2.6V), and internal protection prevents damage from floating or noisy inputs.