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

Diodes Incorporated FMMT589TC

Name: FMMT589TC
Brand: Diodes Incorporated
SKU: FMMT589TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FMMT589TC

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: FMMT589TC.pdf

Description:: TRANS PNP 30V 1A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:7,677

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Product details

Overview

FMMT589 from Diodes Incorporated is a 30V PNP medium-power high-performance transistor in SOT23 package, rated for -1A continuous collector current and -30V V_CEO, with V_CE(sat) < -350mV at -1A and R_SAT = 250mΩ; used in compact DC-DC converter output stages and industrial load switching.

For engineers reviewing the FMMT589 datasheet, FMMT589 pinout, FMMT589 application, or FMMT589 equivalent, key selection criteria include guaranteed -30V V_CEO, low saturation resistance under -1A load, AEC-Q101 qualification, thermal derating on FR4 PCB, and complementary pairing with FMMT489.

Technical Context

This PNP bipolar junction transistor operates in linear and saturated switching modes, with h_FE = 100–300 across -1mA to -1A collector currents and f_T = 100MHz at -100mA, enabling fast switching in power control circuits. Its safe operating area (SOA) is defined up to -2A/100µs pulses and supports DC operation up to 500mW with 250°C/W R_θJA on 15mm × 15mm 1oz copper FR4.

Designed for high-reliability industrial and automotive applications, it meets AEC-Q101 stress testing requirements and features halogen/antimony-free "Green" packaging with UL 94V-0 flammability rating and J-STD-020 Level 1 moisture sensitivity.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-30V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration.
I_C (cont.)	-1A - Continuous DC collector current capability without thermal runaway on standard PCB layout.
V_CE(sat)	< -350mV @ -1A/ -100mA - Ensures low conduction loss and minimal self-heating in saturated switch mode.
R_SAT	250mΩ - Equivalent on-resistance derived from V_CE(sat)/I_C, critical for power efficiency in high-current switches.
f_T	100MHz - Current gain-bandwidth product confirming usable switching speed up to ~10MHz square-wave operation.
h_FE	100–300 - DC current gain range supporting stable biasing across production lots and temperature.
R_θJA	250°C/W - Thermal resistance defining maximum junction temperature rise per watt dissipated on specified PCB copper area.

Pinout & Package

Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, 0.008g weight, UL 94V-0 rated molding compound, and J-STD-020 Level 1 moisture sensitivity.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current source terminal in PNP configuration; connects to higher potential rail in high-side switch topology.
2 (Base)	B	Control input requiring ~-100mA drive for full saturation at -1A collector current.
3 (Collector)	C	Current sink terminal; electrically connected to PCB copper pour for thermal management per R_θJL = 197°C/W.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness (HBM 4kV/MM 400V).
Low V_CE(sat)	< -350mV at -1A ensures ≤350mW conduction loss, reducing thermal design margin requirements.
Complementary NPN pair	FMMT489 shares identical SOT23 footprint and matching gain/speed specs for push-pull driver designs.
"Green" construction	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb), fully RoHS-compliant with no intentionally added lead.

Applications

Industrial Motor Control

Automotive Body Electronics

Use Scenario: Driving 12V solenoid valves in PLC I/O modules with PWM duty cycles up to 50%.

IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow from 12V rail to inductive load.

Use Value: Low R_SAT minimizes power loss during sustained ON periods; AEC-Q101 rating ensures field longevity in harsh environments.

Use Scenario: Controlling LED tail-light arrays in vehicle rear lamp assemblies.

IC Role / Device Role / Timing Role: Constant-current sink switch regulating brightness via base-drive modulation.

Use Value: Tight h_FE distribution enables consistent LED current matching across production batches.

DC-DC Converter Output Stage

Power Supply Sequencing

Use Scenario: Synchronous rectification in non-isolated buck converters delivering 3.3V/2A to FPGA core rails.

IC Role / Device Role / Timing Role: Low-side PNP switch (with external driver) replacing Schottky diode in freewheeling path.

Use Value: V_CE(sat) < -350mV cuts conduction loss by >40% vs. 0.45V Schottky, improving efficiency at 2A load.

Use Scenario: Enabling/disabling auxiliary 5V rail after main 12V supply stabilizes in multi-rail embedded systems.

IC Role / Device Role / Timing Role: Power OR-ing transistor controlled by supervisor IC's reset signal.

Use Value: Fast turn-off (t_off < 100ns typical) prevents backfeed during rail sequencing transitions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTN25050DFH	Higher V_CEO (-50V), lower V_CE(sat) (-200mV @ -1A), but h_FE min = 50 and no AEC-Q101 rating.	Preferred in industrial 24V systems needing extra voltage margin; unsuitable for automotive use.	Select when higher voltage headroom and lower saturation loss outweigh qualification requirements.
MMBT589	Same die in SOT23, but not AEC-Q101 qualified and lacks "Green" compliance documentation.	Acceptable for cost-sensitive consumer electronics where automotive reliability is not required.	Choose only for non-automotive, non-automotive-adjacent applications with relaxed environmental compliance needs.

Compared with ZXTN25050DFH and MMBT589, FMMT589 uniquely delivers AEC-Q101 qualification, documented halogen-free status, and guaranteed -30V V_CEO with tight h_FE distribution-making it the sole choice for safety-critical automotive body control modules requiring traceable green sourcing.

Availability

FMMT589 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, DC-DC converter output stages, and power supply sequencing requiring stable component supply and long-term lifecycle support.

Supply support for FMMT589 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 medium-power switching applications, emphasizing AEC-Q101 qualification, low saturation loss, and environmentally compliant packaging for automotive and industrial end equipment.

FAQ

What is the maximum continuous collector current for FMMT589?

The FMMT589 is rated for -1A continuous collector current at T_A = +25°C on a 15mm × 15mm 1oz copper FR4 PCB. Derating applies above +25°C ambient: power dissipation drops linearly to zero at +150°C case temperature, per the published derating curve.

Is FMMT589 pin-compatible with its NPN counterpart?

Yes - FMMT589 and FMMT489 share identical SOT23 pinout (Emitter-Base-Collector), allowing direct PCB layout reuse in complementary push-pull or H-bridge driver circuits without footprint modification.

Does FMMT589 require external base current limiting in switching applications?

Yes - base current must be limited to ≤ -200mA peak (per absolute max rating) and sized to ensure full saturation. For -1A I_C, a -100mA base drive yields guaranteed V_CE(sat) < -350mV; typical designs use 1–2kΩ base resistors from 3.3V/5V logic sources.

Can FMMT589 be used in linear amplifier configurations?

It can operate in the active region with h_FE = 100–300 at I_C = -1mA to -1A, but its primary design intent is switching. Linear use is limited by thermal constraints (500mW max PD) and SOA boundaries - not recommended for sustained Class-A audio or precision analog amplification.

FMMT589TC 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:: Obsolete

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 650mV @ 200mA, 2A

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 500mA, 2V

Power - Max:: 500 mW

Frequency - Transition:: 100MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

FMMT589TC FAQ

1.How can I place an order for FMMT589TC through Aetrix?

Please submit a Request for Quotation (RFQ) for FMMT589TC 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 FMMT589TC reliable?

The price and inventory of FMMT589TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMT589TC is usually 5 days.

3.What payment methods are accepted for FMMT589TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMT589TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FMMT589TC?

FMMT589TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FMMT589TC 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 FMMT589TC?

For technical support, including FMMT589TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMT589TC requirements.

6.How does Aetrix verify that FMMT589TC is sourced from the original manufacturer or authorized distributors?

All FMMT589TC 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 FMMT589TC meets industry standards.

7.What is the process for return or replacement of FMMT589TC?

All FMMT589TC units undergo pre-shipment inspection (PSI). If there is an issue with FMMT589TC, 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 FMMT589TC part is unused and in its original packaging.

Return procedure for FMMT589TC:

1.Submit a request within 90 days.

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

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