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Diodes Incorporated FMMT720QTA
- Part No.:
- FMMT720QTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
FMMT720QTA.pdf
- Description:
- TRANS PNP 40V 1.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,374
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Product details
Overview
FMMT720QTA from Diodes Incorporated is a 40V PNP silicon low-saturation transistor in SOT23 package, rated for -1.5A continuous collector current, -40V VCEO, and VCE(sat) < -220mV at -1A. It serves as a high-current switching element in gate drive and DC-DC converter power stages, with AEC-Q101 qualification for automotive under-hood applications.
For engineers reviewing the FMMT720QTA datasheet, FMMT720QTA pinout, FMMT720QTA application, or FMMT720QTA equivalent, key selection criteria include guaranteed low RCE(SAT) (163 mΩ), hFE ≥ 180 at -1A, thermal resistance of 155°C/W (note 7), and automotive-grade reliability per AEC-Q101.
Technical Context
This PNP bipolar junction transistor operates in saturation-switching mode with tightly specified VCE(sat) down to -26mV at low current and -245mV at -1.5A/−100mA drive. Its fT of 150–180 MHz supports fast switching in synchronous rectification and active clamping circuits.
Designed for thermally constrained SOT23 layouts, it delivers 625 mW steady-state and 806 mW short-pulse power dissipation on standard FR4 PCBs, with JEDEC Class 3A HBM ESD rating (4 kV) and moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40 V - Maximum blocking voltage between collector and emitter in open-base configuration |
| IC (continuous) | -1.5 A - Sustained collector current without thermal derating at TA = 25°C |
| VCE(sat) | < -220 mV @ -1A/-50mA - Ensures minimal conduction loss in high-side switch configurations |
| RCE(SAT) | 163 mΩ - Equivalent on-resistance enabling precise power loss calculation in linear-region modeling |
| hFE | 180–290 @ -1A - Confirmed current gain retention at full rated load, critical for base drive sizing |
| fT | 150–180 MHz - Supports switching frequencies up to ~30 MHz in optimized gate-drive applications |
| ESD HBM | 4,000 V - Robust handling during board assembly and automated test without additional protection |
Pinout & Package
SOT23 plastic surface-mount package with matte tin-plated leads, UL 94V-0 flammability rating, and 0.008 g mass. Pin assignment verified per Diodes DS33238 Rev. 4-2 top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current source terminal; connects to higher potential rail in high-side switch topology |
| 2 (Base) | B | Control input requiring negative current injection to saturate PNP device |
| 3 (Collector) | C | Current sink terminal; ties to load or switching node, referenced to ground or lower potential |
Key Features
| Feature | Design Value |
|---|---|
| Low saturation voltage | VCE(sat) ≤ -245 mV at -1.5A ensures < 370 mW conduction loss in worst-case load condition |
| AEC-Q101 qualification | Validated for automotive under-hood operation (-40°C to +150°C) with PPAP capability |
| High current gain at full load | hFE ≥ 180 @ -1A enables compact base drive circuitry with reduced gate driver loading |
| Green, lead-free construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meets automotive environmental mandates |
Applications
| Gate Drive for Power MOSFETs | DC-DC Converter Switching Stage |
|---|---|
Use Scenario: Driving the gate of N-channel MOSFETs in half-bridge or synchronous buck converters. IC Role / Device Role / Timing Role: PNP switch providing fast, low-loss turn-off path for MOSFET gate discharge. Use Value: VCE(sat) < -220 mV at -1A minimizes gate discharge energy loss and improves switching efficiency. | Use Scenario: Active clamp or high-side switch in isolated flyback or forward converters. IC Role / Device Role / Timing Role: Saturated PNP switch controlling primary-side current flow during PWM on-time. Use Value: 163 mΩ RCE(SAT) and 150+ MHz fT support stable operation at 500 kHz–1 MHz switching frequencies. |
| Automotive Charging Circuit | Industrial Power Switch |
Use Scenario: Regulated battery charging control in 12V/24V vehicle systems with reverse polarity protection. IC Role / Device Role / Timing Role: High-reliability PNP pass transistor in series with charging path, controlled by microcontroller. Use Value: AEC-Q101 qualification and -55°C to +150°C operating range ensure functional safety in engine bay environments. | Use Scenario: Solid-state relay replacement in PLC output modules and motor control logic. IC Role / Device Role / Timing Role: Discrete power switch interfacing microcontroller GPIO to 24V industrial loads. Use Value: 4 kV HBM ESD rating and 625 mW power dissipation enable direct GPIO interface without external protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP low-saturation transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25050DFH | VCEO = -50V, IC = -2A, VCE(sat) = -220mV @ -1.5A, SOT23-3L package | Higher voltage rating and slightly higher current; same footprint but different pinout (C-B-E vs E-B-C) | Requires PCB layout revision due to reversed collector/emitter pin assignment |
| DMT3005LKQ | VCEO = -30V, IC = -1.2A, VCE(sat) = -250mV @ -1A, SOT23 package | Lower voltage/current ratings and higher saturation voltage; RoHS-compliant but not AEC-Q101 qualified | Suitable only for non-automotive industrial use where qualification is not required |
Compared with ZXTN25050DFH and DMT3005LKQ, FMMT720QTA uniquely combines AEC-Q101 qualification, -40V rating, and sub-220mV VCE(sat) at -1A in standard E-B-C SOT23 orientation-making it optimal for automotive gate drive and high-reliability power switching where pin compatibility and qualification are mandatory.
Availability
FMMT720QTA is available at Aetrix Electronics and suitable for automotive gate driving, DC-DC converter switching stages, and industrial power switches requiring stable component supply across production lifecycles.
Supply support for FMMT720QTA 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-performance, high-reliability components for automotive, industrial, and computing markets.
The FMMT720QTA belongs to Diodes' AEC-Q101-qualified discrete transistor product line, engineered specifically for robust, low-loss switching in automotive power management and gate drive applications.
FAQ
What is the maximum continuous collector current for FMMT720QTA?
The FMMT720QTA is rated for -1.5 A continuous collector current at TA = +25°C with appropriate PCB copper area. Derating applies above 25°C ambient, reaching zero current at approximately +150°C case temperature per the published thermal curve.
Is FMMT720QTA pin-compatible with the standard FMMT720TA?
Yes-FMMT720QTA and FMMT720TA share identical SOT23 pinout (Emitter-Base-Collector), electrical specifications, and thermal performance. The "Q" suffix denotes automotive qualification (AEC-Q101 and PPAP capable), while "TA" is the commercial-grade version; both use the same E-B-C pin assignment.
Does FMMT720QTA require a heatsink in typical SOT23 applications?
No external heatsink is required. With RθJA = 155°C/W (short-pulse) and 625 mW steady-state dissipation on a 25 mm × 25 mm 1 oz Cu FR4 pad, junction temperature remains within -55°C to +150°C limits under typical 1.5A switching duty cycles at room ambient.
What is the complementary NPN transistor for FMMT720QTA?
The officially designated complementary NPN type is FMMT619, also in SOT23 package, with matched VCEO = +40V, IC = +1.5A, and VCE(sat) < +220mV @ +1A. Both devices share identical thermal and packaging characteristics, enabling balanced push-pull or H-bridge designs.
FMMT720QTA 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):
- 1.5 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 330mV @ 100mA, 1.5A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 180 @ 1A, 2V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
FMMT720QTA FAQ
1.How can I place an order for FMMT720QTA through Aetrix?
Please submit a Request for Quotation (RFQ) for FMMT720QTA 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 FMMT720QTA reliable?
The price and inventory of FMMT720QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMT720QTA is usually 5 days.
3.What payment methods are accepted for FMMT720QTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMT720QTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FMMT720QTA?
FMMT720QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FMMT720QTA 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 FMMT720QTA?
For technical support, including FMMT720QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMT720QTA requirements.
6.How does Aetrix verify that FMMT720QTA is sourced from the original manufacturer or authorized distributors?
All FMMT720QTA 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 FMMT720QTA meets industry standards.
7.What is the process for return or replacement of FMMT720QTA?
All FMMT720QTA units undergo pre-shipment inspection (PSI). If there is an issue with FMMT720QTA, 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 FMMT720QTA part is unused and in its original packaging.
Return procedure for FMMT720QTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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