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Diodes Incorporated FMMT617TA
- Part No.:
- FMMT617TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
FMMT617TA.pdf
- Description:
- TRANS NPN 15V 3A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:11,275
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Product details
Overview
FMMT617TA from Diodes Incorporated is a 15V NPN low-saturation transistor in SOT23 package, rated for 3A continuous collector current and 12A peak pulse current, with RCE(sat) = 50 mΩ at IC = 3A/IB = 50mA, 625 mW power dissipation, and AEC-Q101 qualification for automotive-grade reliability-used in DC-DC converter switching stages.
For engineers reviewing the FMMT617TA datasheet, FMMT617TA pinout, FMMT617TA application, or FMMT617TA equivalent, key selection criteria include VCEO = 15V, IC = 3A, RCE(sat) ≤ 150 mΩ at 3A, hFE ≥ 150 at 3A, and SOT23 thermal performance under pulsed high-current loads.
Technical Context
This NPN bipolar junction transistor operates as a high-current, low-VCE(sat) switch in saturated mode, supporting fast switching (ton = 120 ns, toff = 160 ns) with fT = 80–120 MHz. It maintains hFE ≥ 150 up to IC = 3A and holds gain stability up to 12A pulsed.
Designed for thermally constrained PCB layouts, it delivers 625 mW continuous power dissipation on 25 mm × 25 mm FR4 with 1 oz copper, and its RθJA = 200 °C/W enables operation from –55°C to +150°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 15 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration |
| IC (continuous) | 3 A - Sustained collector current without derating at TA = 25°C on standard PCB |
| RCE(sat) | ≤150 mΩ at IC = 3A/IB = 50mA - Enables <0.45 W conduction loss per device in high-efficiency switching |
| hFE | ≥150 at IC = 3A/VCE = 2V - Ensures reliable base drive margin for 3A load control with modest IB |
| fT | 80–120 MHz - Supports switching frequencies up to ~10 MHz in optimized Class-A/B or PWM applications |
| ESD HBM | 4000 V - Robust handling tolerance for automated assembly and board-level integration |
Pinout & Package
SOT23 plastic surface-mount package (3-pin, 2.9 mm × 1.3 mm × 1.0 mm), matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Low-impedance return path; connected to ground or low-side reference in switching topologies |
| 2 (Base) | Control input | Receives current-limited drive (max 500 mA) to saturate or cut off the transistor |
| 3 (Collector) | High-current output node | Switches load between supply rail and emitter; thermally coupled to PCB copper via lead |
Key Features
| Feature | Design Value |
|---|---|
| Low saturation voltage | RCE(sat) ≤ 150 mΩ at 3A ensures <0.45 W conduction loss, reducing thermal stress in compact DC-DC modules |
| High current capability | 3A continuous / 12A pulsed rating supports high-power LED drivers and CCFL inverter primary-side switching |
| AEC-Q101 qualified | Validated for automotive temperature cycling, humidity, and mechanical shock-suitable for under-hood regulator modules |
| Green, RoHS-compliant construction | Halogen- and antimony-free molding compound (<900 ppm Br+Cl, <1000 ppm Sb) meets global environmental compliance mandates |
Applications
| DC-DC Converter Switching Stage | LED Driver Current Switch |
|---|---|
Use Scenario: High-efficiency synchronous buck converter operating at 500 kHz with 12V input and 3.3V/2A output. IC Role / Device Role / Timing Role: Low-side NPN switch controlling inductor current discharge path during PWM off-time. Use Value: RCE(sat) ≤ 150 mΩ limits conduction loss to <0.9 W at full load, enabling >92% efficiency without forced air cooling. | Use Scenario: Constant-current driver for high-brightness white LEDs in automotive interior lighting. IC Role / Device Role / Timing Role: Linear or PWM-controlled current sink regulating LED string current up to 3A. Use Value: Stable hFE ≥ 150 at 3A allows precise analog current setting with minimal base drive variation across temperature. |
| CCFL Backlight Inverter | Linear Voltage Regulator Pass Element |
Use Scenario: Resonant half-bridge inverter driving cold-cathode fluorescent lamp in industrial display backlighting. IC Role / Device Role / Timing Role: Primary-side switching transistor handling 12A pulsed collector current during resonant tank excitation. Use Value: 12A ICM rating and 160 ns toff support clean zero-voltage switching transitions at 50–100 kHz. | Use Scenario: Adjustable linear regulator delivering 5V/1.5A from 12V supply in embedded control module. IC Role / Device Role / Timing Role: Series pass element dissipating up to 10.5 W (7V × 1.5A) in worst-case dropout condition. Use Value: RθJA = 200 °C/W and 150°C max TJ allow safe operation with 25 mm² copper pour, avoiding external heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN low-saturation transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN2010Z | VCEO = 20V, RCE(sat) = 45 mΩ @ 3A, SOT23-3 but higher VCEO margin | Better suited for 18–20V rail systems where 15V headroom is insufficient | Select when system input exceeds 15V or lower RCE(sat) is critical for thermal budget |
| MMBT6427 | IC = 2A (lower), RCE(sat) = 180 mΩ @ 2A, same SOT23 footprint | Lower current/power capability; suitable only for sub-2A LED or regulator loads | Choose for cost-sensitive, lower-power designs where 3A rating is unnecessary |
Compared with ZXTN2010Z and MMBT6427, FMMT617TA uniquely balances 15V VCEO, 3A continuous rating, and 150 mΩ RCE(sat) in AEC-Q101-qualified SOT23-making it optimal for automotive DC-DC and industrial LED drivers requiring reliability and thermal efficiency within strict voltage constraints.
Availability
FMMT617TA is available at Aetrix Electronics and suitable for DC-DC converter modules, LED driver circuits, and CCFL backlight inverters requiring stable component supply, AEC-Q101 compliance, and SOT23 thermal performance.
Supply support for FMMT617TA 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 power management, signal integrity, and protection solutions.
The FMMT617TA belongs to Diodes' AEC-Q101-qualified low-saturation transistor product line, engineered for automotive and industrial switching applications demanding robust pulsed current handling and thermal stability in miniature SOT23 packages.
FAQ
What is the maximum allowable base current for FMMT617TA?
The absolute maximum base current is 500 mA, as specified in the Absolute Maximum Ratings table. For reliable 3A switching, the recommended base drive is 50 mA (IB = IC / hFE ≈ 3A / 60), ensuring deep saturation while staying well below the 500 mA limit and minimizing base power dissipation.
Can FMMT617TA be used in linear regulator applications?
Yes-it is rated for 625 mW continuous power dissipation at 25°C ambient on standard PCB, and its RθJA = 200 °C/W allows safe operation up to ~150°C junction temperature. With proper copper area and thermal design, it supports linear regulation up to ~1.5A at 7V dropout, provided transient thermal limits are observed.
Is FMMT617TA pin-compatible with its complementary PNP type?
Yes-FMMT717 (the complementary PNP) uses identical SOT23 package and pinout (Emitter-Base-Collector), enabling direct pairing in push-pull or H-bridge configurations without layout changes. Both share matching thermal and switching specifications per the Diodes datasheet family documentation.
Does FMMT617TA require special ESD handling during assembly?
While rated for 4 kV HBM ESD, FMMT617TA must still be handled per J-STD-020 Level 1 guidelines: no special dry-pack required, but standard ESD-safe workstations, grounded tools, and ionized air are recommended-especially given its 7V VEBO rating, which makes base-emitter junction sensitive to overvoltage transients during reflow or probing.
FMMT617TA 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:
- NPN
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 15 V
- Vce Saturation (Max) @ Ib, Ic:
- 200mV @ 50mA, 3A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 200mA, 2V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 120MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
FMMT617TA FAQ
1.How can I place an order for FMMT617TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FMMT617TA 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 FMMT617TA reliable?
The price and inventory of FMMT617TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMT617TA is usually 5 days.
3.What payment methods are accepted for FMMT617TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMT617TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FMMT617TA?
FMMT617TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FMMT617TA 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 FMMT617TA?
For technical support, including FMMT617TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMT617TA requirements.
6.How does Aetrix verify that FMMT617TA is sourced from the original manufacturer or authorized distributors?
All FMMT617TA 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 FMMT617TA meets industry standards.
7.What is the process for return or replacement of FMMT617TA?
All FMMT617TA units undergo pre-shipment inspection (PSI). If there is an issue with FMMT617TA, 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 FMMT617TA part is unused and in its original packaging.
Return procedure for FMMT617TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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