Diodes Incorporated FMMT723TC

Overview

FMMT723 from Diodes Incorporated is a 100V PNP low-saturation bipolar junction transistor in SOT23 package, designed for high-side switching and load disconnect applications. It delivers -1A continuous collector current, -330mV V_CE(sat) at -1A, and 210mΩ equivalent on-resistance, with AEC-Q101 qualification for automotive reliability.

For engineers reviewing the FMMT723 datasheet, FMMT723 pinout, FMMT723 application, or FMMT723 equivalent, key selection criteria include breakdown voltage (BV_CEO = -100V), saturation performance under high current, thermal derating behavior, and compatibility with SOT23 footprint constraints in space-constrained power control circuits.

Technical Context

The FMMT723 operates as a PNP bipolar transistor with fixed-emitter biasing topology, optimized for linear and saturated switching modes. Its BV_CEO of -100V and VEBO of -7V define safe operating limits for high-side configurations where emitter sits at system rail potential.

Thermal design relies on R_θJA = 200°C/W (steady-state) and R_θJL = 194°C/W, enabling 625mW dissipation on standard FR4 PCBs. The device's h_FE remains ≥250 up to -1A, supporting robust base drive margin in motor drive and load switch implementations.

Key Specifications

Pinout & Package

Package: SOT23 - Surface-mount plastic case, 0.008 g weight, UL 94V-0 rated, 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 ZXTN25050DFH and MMBT3906, the FMMT723 uniquely balances -100V blocking, -1A current capability, SOT23 form factor, and AEC-Q101 compliance-making it optimal for production automotive high-side switches where size, reliability, and voltage margin are jointly constrained.

Availability

FMMT723 is available at Aetrix Electronics and suitable for automotive body control, industrial load switching, and motor drive applications requiring stable component supply and long-term lifecycle support.

Supply support for FMMT723 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 components for automotive, industrial, and computing markets.

The FMMT723 belongs to Diodes' FMMT series of high-voltage, high-current transistors engineered specifically for robust high-side switching and load management in harsh-environment applications.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum base current is -500 mA per datasheet Absolute Maximum Ratings. However, for reliable continuous operation at -1A collector current, base current should be limited to -150 mA to maintain V_BE(sat) ≤ -1.0 V and avoid thermal runaway. Derating is required above +25°C ambient per the thermal curves on page 3 of DS33240.

Can FMMT723 replace a MOSFET in high-side switching?

FMMT723 can replace low-power P-channel MOSFETs in applications where gate drive simplicity and cost outweigh efficiency needs. Unlike MOSFETs, it requires continuous base current (≈150 mA at -1A), resulting in higher drive power loss-but offers superior avalanche ruggedness and no gate charge delay. Not suitable where <100 µA quiescent current is mandatory.

Is the SOT23 footprint compatible with automated pick-and-place assembly?

Yes-the SOT23 package uses standardized JEDEC MO-178AC dimensions with 0.95 mm pitch and defined pad layout (AP02001). Its 0.008 g weight and matte tin-plated leads ensure reliable solder paste release and reflow wetting. Moisture sensitivity level 1 eliminates bake requirements prior to assembly.

How does AEC-Q101 qualification impact its use in non-automotive designs?

AEC-Q101 qualification certifies extended temperature operation (-55°C to +150°C), enhanced ESD robustness (4 kV HBM), and accelerated lifetime testing-benefiting any industrial or outdoor application exposed to thermal cycling or electrical noise. No derating is needed outside automotive; the same electrical specs apply, with added margin for reliability-critical systems.