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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated FMMT593QTA

Name: FMMT593QTA
Brand: Diodes Incorporated
SKU: FMMT593QTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FMMT593QTA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: FMMT593QTA.pdf

Description:: TRANS PNP 100V 1A SOT-23

Quantity:: RFQ Add To RFQ list

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Inventory:14,409

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Product details

Overview

FMMT593QTA from Diodes Incorporated is a 100V PNP high-voltage transistor in SOT23 (Type DN) package, designed for high-side switching and load disconnect applications. It delivers -1A continuous collector current, -100V V_CEO, low -200mV V_CE(sat) at -250mA/-25mA drive, and robust h_FE ≥100 up to -1A - enabling reliable operation in motor drive power stages.

For engineers reviewing the FMMT593QTA datasheet, FMMT593QTA pinout, FMMT593QTA application, or FMMT593QTA equivalent, key selection criteria include verified high-voltage blocking (-100V V_CEO), pulsed current capability (-2A I_CM), thermal resistance (R_θJA = 250°C/W on 15×15mm FR4), and complementary pairing with FMMT493 for push-pull designs.

Technical Context

This PNP bipolar junction transistor operates in linear or saturated switching mode with guaranteed breakdown ratings: V_CBO = -120V, V_CEO = -100V, and V_EBO = -7V. Its f_T = 50MHz supports moderate-speed switching in DC-DC and gate-drive circuits.

Electrical behavior is characterized by tight h_FE consistency (100–300 across -1mA to -1A), low leakage (I_CBO, I_EBO, I_CES ≤ -100nA), and defined saturation voltages: V_CE(sat) = -300mV max at -500mA/-50mA, V_BE(sat) = -1.1V at same conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-100V - Enables safe operation in 48V+ industrial bus and automotive battery-disconnect circuits
I_C (cont.)	-1A - Supports sustained load currents in motor driver half-bridges and solenoid drivers
I_CM	-2A - Allows short-duration surge handling during motor startup or fault recovery
V_CE(sat)	-300mV max @ -500mA/-50mA - Minimizes conduction loss and self-heating in high-side switches
h_FE	100–300 @ -1mA to -1A - Ensures predictable base drive requirements across full operating range
f_T	50MHz - Supports PWM frequencies up to ~5MHz with acceptable gain margin
R_θJA	250°C/W - Requires thermal pad or copper pour for >300mW steady-state dissipation

Pinout & Package

Package: SOT23 (Type DN), surface-mount, lead-free, halogen-free, moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal	Connected to positive rail in high-side switch configuration; must handle full load current
2 (Base)	Control input	Receives negative drive current to turn on; requires current-limiting resistor for logic-level control
3 (Collector)	Output/switching node	Connected to load; voltage swings from near ground to -100V during off-state

Key Features

Feature	Design Value
High V_CEO rating	-100V enables use in 48V, 60V, and 72V industrial power systems without derating
Low V_CE(sat)	-200mV typical at -250mA ensures <50mW conduction loss in compact PCB layouts
Stable h_FE vs. I_C	h_FE ≥100 maintained up to -1A, simplifying base drive design for consistent saturation
Complementary NPN pair	FMMT493 shares identical SOT23 footprint and matching specs for push-pull output stages
AEC-Q101 readiness	Manufactured in IATF 16949-certified facilities; PPAP-capable for automotive-grade qualification paths

Applications

High-Side Drivers

Load Disconnect Switches

Use Scenario: Controlling power delivery to sensors or actuators in PLC I/O modules.

IC Role / Device Role / Timing Role: PNP high-side switch enabling rail-to-rail voltage control with logic-compatible base drive.

Use Value: -100V V_CEO prevents breakdown during 48V bus transients; -300mV V_CE(sat) limits heat rise in confined enclosures.

Use Scenario: Isolating backup battery or auxiliary supply during main system fault events.

IC Role / Device Role / Timing Role: Fast-turn-off load switch activated by microcontroller GPIO via base resistor.

Use Value: -2A I_CM handles inrush surges; -100nA I_CES ensures zero standby leakage in always-on safety circuits.

Motor Drives

Industrial Power Supplies

Use Scenario: Driving small DC motors or stepper coil phases in factory automation equipment.

IC Role / Device Role / Timing Role: Low-side or high-side current sink/source in H-bridge half-bridge sections.

Use Value: 50MHz f_T supports 10–20kHz PWM without phase lag; h_FE stability ensures repeatable torque control.

Use Scenario: Regulating auxiliary bias rails in telecom rectifiers and server PSUs.

IC Role / Device Role / Timing Role: Linear pass element or switching transistor in discrete LDO or pre-regulator stage.

Use Value: R_θJL = 197°C/W allows direct solder-point thermal path to PCB copper, improving reliability over 100k-hour MTBF.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX951	V_CEO = -100V, I_C = -1A, but h_FE min = 60 @ -1A - lower current gain consistency	Less suitable for precision base-driven loads where h_FE variation impacts regulation accuracy	Prefer FMMT593QTA when stable h_FE across full I_C range is required
MMBT5401	V_CEO = -60V, I_C = -200mA - lower voltage and current ratings	Restricted to sub-24V systems; cannot replace in 48V+ high-side switch roles	Select only for cost-sensitive, low-power legacy designs with no voltage headroom requirement

Compared with ZTX951 and MMBT5401, FMMT593QTA uniquely combines -100V blocking, -1A continuous current, and h_FE ≥100 up to rated I_C, making it the only option qualified for thermally constrained 48V industrial high-side switching without gain degradation.

Availability

FMMT593QTA is available at Aetrix Electronics and suitable for high-side drivers, load disconnect switches, motor drives, and industrial power supplies requiring stable component supply, RoHS-compliant packaging, and AEC-Q101 qualification readiness.

Supply support for FMMT593QTA 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 FMMT series targets high-reliability discrete power switching, emphasizing high-voltage PNP/NPN pairs in miniature SOT23 packages for space-constrained industrial and automotive subsystems.

FAQ

What is the maximum safe operating voltage for FMMT593QTA in continuous DC applications?

The absolute maximum collector-emitter voltage (V_CEO) is -100V at T_A = +25°C. For reliable long-term operation, Diodes recommends limiting V_CE to ≤ -80V under continuous DC conditions to maintain margin against temperature-induced drift and transient spikes, especially when mounted on standard FR4 without thermal enhancement.

Can FMMT593QTA be used as a direct replacement for FMMT591 in existing designs?

No - FMMT591 has V_CEO = -60V and I_C = -500mA, while FMMT593QTA is rated for -100V and -1A. Substituting without circuit review risks overvoltage failure and excessive power dissipation; layout and base drive must be re-verified for higher current and voltage margins.

Does FMMT593QTA require a heatsink in typical SOT23 mounting configurations?

Not for ≤300mW steady-state dissipation. With R_θJA = 250°C/W on 15×15mm FR4, 300mW yields ~75°C junction rise above ambient. Heatsinking is unnecessary below this threshold, but thermal vias and copper pour are recommended for sustained >500mW operation or ambient temperatures exceeding +70°C.

Is the FMMT593QTA marking code "593" sufficient for full traceability and lot identification?

Yes - "593" is the product type code per Diodes' marking standard. Full traceability requires the full reel label or top-side date/lot code (e.g., "YYWWL" format). Diodes provides full lot documentation upon request, including wafer fab location, test data, and RoHS compliance certificates for each shipment.

FMMT593QTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 500mA, 5V

Power - Max:: 500 mW

Frequency - Transition:: 50MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23 (Type DN)

FMMT593QTA FAQ

1.How can I place an order for FMMT593QTA through Aetrix?

Please submit a Request for Quotation (RFQ) for FMMT593QTA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for FMMT593QTA reliable?

The price and inventory of FMMT593QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMT593QTA is usually 5 days.

3.What payment methods are accepted for FMMT593QTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMT593QTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FMMT593QTA?

FMMT593QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FMMT593QTA order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for FMMT593QTA?

For technical support, including FMMT593QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMT593QTA requirements.

6.How does Aetrix verify that FMMT593QTA is sourced from the original manufacturer or authorized distributors?

All FMMT593QTA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FMMT593QTA meets industry standards.

7.What is the process for return or replacement of FMMT593QTA?

All FMMT593QTA units undergo pre-shipment inspection (PSI). If there is an issue with FMMT593QTA, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The FMMT593QTA part is unused and in its original packaging.

Return procedure for FMMT593QTA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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