Diodes Incorporated FZT1147ATC

Overview

FZT1147ATC from Diodes Incorporated is a 12V PNP medium-power high-gain transistor in SOT223 package, rated for -5A continuous collector current, -12V V_CEO, and 85mΩ R_CE(sat) at -2A. It delivers h_FE ≥ 200 at -2A and meets AEC-Q101 for automotive reliability, used in DC-DC converter output stages and motor driver high-side switches.

For engineers reviewing the FZT1147ATC datasheet, FZT1147ATC pinout, FZT1147ATC application, or FZT1147ATC equivalent, key selection criteria include verified PNP saturation voltage under -5A load, thermal resistance to ambient (41.7°C/W on 52mm×52mm 2oz Cu), safe operating area limits at 100μs–1s pulse widths, and RoHS/halogen-free compliance per J-STD-020 Level 1.

Technical Context

This PNP bipolar junction transistor operates with emitter-grounded configuration, supporting linear and switching modes up to 115MHz f_T. Its low R_CE(sat) of 85mΩ at -2A and V_BE(sat) of -950mV at -5A enable efficient high-current sinking in power management circuits.

The device features robust thermal performance: R_θJA = 41.7°C/W (52mm×52mm 2oz Cu), R_θJL = 10.9°C/W, and operates across -55°C to +150°C. ESD ratings are 4kV HBM and 400V MM, confirming suitability for industrial assembly environments.

Key Specifications

Pinout & Package

Package: SOT223 - Surface-mount plastic package with exposed collector tab for thermal dissipation; 0.112g weight; UL 94V-0 flammability rating; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power transistor applications.

Compared with ZXTN19020CFH and MJD122G, FZT1147ATC offers optimal balance of SOT223 surface-mount compatibility, -5A current rating, and 85mΩ on-resistance-making it preferred for space-constrained automotive and industrial boards requiring AEC-Q101 validation and efficient thermal transfer through PCB copper.

Availability

FZT1147ATC is available at Aetrix Electronics and suitable for automotive HVAC control, industrial DC-DC converter output stages, programmable LED drivers, and solenoid interface circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for FZT1147ATC 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.

The FZT1147ATC belongs to Diodes' AEC-Q101-qualified medium-power transistor family, designed specifically for automotive and industrial switching applications demanding robust thermal performance and consistent gain at high current.

FAQ

What is the maximum pulsed collector current rating for FZT1147ATC?

The FZT1147ATC supports a peak pulse current (I_CM) of -20A, specified under pulsed conditions with ≤2% duty cycle and 300μs pulse width. This rating enables reliable handling of motor startup surges and solenoid inrush currents without thermal runaway, provided PCB thermal design meets the 52mm×52mm 2oz copper reference layout.

Does FZT1147ATC require a heatsink in standard SOT223 mounting?

No external heatsink is required when mounted per the recommended 52mm×52mm 2oz copper pad layout, as its R_θJA is 41.7°C/W and maximum power dissipation is 3.0W. At 2.5W continuous dissipation, junction temperature rise remains within -55°C to +150°C operating range. Smaller copper areas increase thermal resistance and may necessitate derating.

How does the AEC-Q101 qualification impact FZT1147ATC's use in non-automotive applications?

AEC-Q101 qualification confirms extended stress testing-including temperature cycling, HTOL, and ESD-beyond standard industrial requirements. This translates to higher field reliability in harsh environments like factory floors or outdoor equipment, even when used outside automotive contexts, without requiring additional qualification effort by the end designer.

Can FZT1147ATC be used in linear regulator applications?

Yes-the FZT1147ATC supports linear operation with h_FE ≥ 200 at -2A and V_BE(on) = -905mV at -5A, enabling stable emitter-follower configurations. However, its 3.0W max power dissipation and R_θJA require careful thermal design; it is best suited for low-dropout, medium-current regulators where efficiency is secondary to simplicity and cost.