Diodes Incorporated FZT753QTC

Overview

FZT753QTC from Diodes Incorporated is a 100V PNP high-performance bipolar junction transistor in SOT223 package, rated for -2A continuous collector current and -6A peak pulse current, with V_CE(sat) < -300mV at -1A, designed for high-reliability automotive power switching applications including load control and motor drive stages.

For engineers reviewing the FZT753QTC datasheet, FZT753QTC pinout, FZT753QTC application, or FZT753QTC equivalent, key selection criteria include breakdown voltage (BV_CEO = -100V), thermal resistance (R_θJA = 41.7°C/W on 50mm × 50mm 2oz copper), AEC-Q101 qualification, and complementary pairing with FZT653 for push-pull designs.

Technical Context

This PNP transistor operates in linear and saturated switching modes, supporting DC and pulsed loads up to -2A with guaranteed h_FE ≥ 55 at -1A and ≥ 25 at -2A. Its -100V V_CEO rating enables use in 48V industrial and 12V/24V automotive systems where reverse-biased collector-base junction integrity is critical.

Thermal performance is defined across multiple PCB layouts: R_θJA ranges from 41.7°C/W (50mm × 50mm 2oz Cu) to 104°C/W (minimum pad layout), and R_θJL = 12.9°C/W confirms efficient heat conduction through the collector lead-essential for sustained high-current operation without external heatsinking.

Key Specifications

Pinout & Package

Package: SOT223 - surface-mount plastic package with exposed collector tab for thermal and electrical connection; 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 high-voltage switching applications.

Compared with ZXTN25050DFHTA and MJD2955T4G, FZT753QTC uniquely balances 100V ruggedness, SOT223 mountability, and -2A capability-making it optimal for automotive-grade, medium-power discrete switching where board space, thermal management, and transient immunity are co-constrained.

Availability

FZT753QTC is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, and DC motor speed control circuits requiring stable component supply with AEC-Q101 traceability and long-term lifecycle assurance.

Supply support for FZT753QTC 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.

FZT753QTC belongs to Diodes' high-reliability discrete transistor product line, engineered specifically for automotive and industrial power switching applications demanding AEC-Q101 qualification, high-voltage tolerance, and thermally efficient SOT223 packaging.

FAQ

What is the difference between FZT753QTC and FZT753TA?

FZT753QTC is the automotive-grade variant with AEC-Q101 qualification and PPAP capability, supplied in 13-inch reels of 4,000 units; FZT753TA is the commercial-grade version in 7-inch reels of 1,000 units. Electrically and thermally identical, but only FZT753QTC carries automotive compliance documentation and lot-level traceability required for Tier 1 automotive programs.

Can FZT753QTC be used in high-frequency switching above 100kHz?

No-its f_T of 100–140MHz and 600ns turn-off time limit practical PWM operation to ≤10kHz. At higher frequencies, switching losses increase significantly due to minority-carrier storage delay; MOSFETs like DMTH4007LPSF are recommended for >50kHz applications.

Is the collector tab electrically isolated from other pins?

No-the collector (C) is internally connected to the exposed metal tab in the SOT223 package. This tab must be electrically tied to the collector net and thermally connected to a PCB copper pour; isolation requires insulating hardware or dielectric coating if mounting to a heatsink.

Does FZT753QTC require a base resistor, and how is its value calculated?

Yes-a series base resistor is mandatory to limit I_B. For -1A I_C and h_FE = 100 (min), I_B ≥ -10mA is needed. With V_BE(sat) ≈ -1.0V and 3.3V GPIO drive, R_B = (3.3V − 1.0V)/10mA = 230Ω; 220Ω is standard. Derate for temperature and ensure resistor power rating exceeds I_B²R at worst-case duty cycle.