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Diodes Incorporated FCX619TA
- Part No.:
- FCX619TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
FCX619TA.pdf
- Description:
- TRANS NPN 50V 3A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:26,397
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Product details
Overview
FCX619TA from Diodes Incorporated is a 50V NPN low-saturation power transistor in SOT89 package, rated for 3A continuous collector current and 6A peak pulse current, with VCE(sat) < 220mV at 1A and RCE(sat) = 87mΩ at 2.75A, used in motor control and DC-DC converter load switching.
For engineers reviewing the FCX619TA datasheet, FCX619TA pinout, FCX619TA application, or FCX619TA equivalent, key selection criteria include saturation voltage under high-current drive, thermal resistance to ambient (62.5°C/W on 40mm×40mm copper), AEC-Q101 qualification, and SOT89 mechanical compatibility with thermal pad layout.
Technical Context
This NPN bipolar junction transistor operates as a high-current, low-VCE(sat) switch in linear and saturated modes, supporting pulsed operation up to 6A with duty cycle ≤2% and pulse width ≤300μs. Its hFE is characterized from 10mA to 6A, ensuring stable gain across wide load ranges.
Thermal performance depends critically on PCB copper area: RθJA improves from 178°C/W (1oz, minimal pad) to 62.5°C/W (1oz, 40mm×40mm), while RθJL = 6°C/W confirms efficient heat transfer via the exposed collector pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50V - maximum blocking voltage between collector and emitter in common-emitter configuration |
| IC (continuous) | 3A - steady-state current handling capacity without thermal runaway on recommended PCB layout |
| VCE(sat) @ 1A | <220mV - ensures <0.22W conduction loss at 1A, critical for efficiency in battery-powered loads |
| RCE(sat) @ 2.75A | 87mΩ - enables precise on-resistance modeling for thermal design and current-sense accuracy |
| hFE @ 6A | ≥30 - verified current gain at full-rated pulse current, supporting robust base drive design |
| PD (max, 40mm×40mm) | 2.0W - achievable dissipation with large copper area, defining upper bound for continuous power handling |
| fT | 100MHz (min) - supports switching above audio frequencies, suitable for PWM-based converters |
Pinout & Package
Package: SOT89 - surface-mount plastic package with exposed collector pad for enhanced thermal conduction; dimensions per Diodes DS33067 Rev. 9-2 (D = 4.50mm, E = 2.50mm, H = 4.10mm, pad layout critical for RθJA performance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | Main current path output terminal | Exposed metal pad - must be soldered to ≥40mm² copper for rated 2.0W dissipation |
| Emitter (E) | Current return path to ground/reference | Low-inductance connection point; ties directly to system GND plane for stability |
| Base (B) | Control input for transistor turn-on/turn-off | Requires 100mA drive at 2.75A IC; VBE(sat) = 0.97V typical defines driver voltage headroom |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM 4kV) |
| Low RCE(sat) | 87mΩ at 2.75A enables <0.6W conduction loss, reducing heatsink requirements in space-constrained designs |
| High ICM | 6A peak pulse rating supports short-duration inrush current handling in motor startup and solenoid drive |
| Green compound | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets automotive environmental compliance |
| Thermally optimized pad | Exposed collector pad with RθJL = 6°C/W allows direct thermal coupling to PCB copper, bypassing epoxy thermal resistance |
Applications
| Automotive Body Control Module | Industrial DC Motor Driver |
|---|---|
Use Scenario: Switching 12V/24V window lift or seat actuator loads in passenger vehicles. IC Role / Device Role / Timing Role: NPN power switch controlling motor direction and stall current via PWM-driven base. Use Value: AEC-Q101 qualification and 50V VCEO ensure robustness against load dump transients up to ISO 7637-2 Pulse 5a. | Use Scenario: Driving brushed DC motors in factory automation conveyors and robotic joints. IC Role / Device Role / Timing Role: High-current saturated switch enabling bidirectional control with external H-bridge diodes. Use Value: 87mΩ RCE(sat) limits conduction loss to <0.6W at 2.75A, minimizing thermal derating in enclosed enclosures. |
| DC-DC Buck Converter Sync FET | Smart Load Switch for PoE PD |
Use Scenario: Low-side synchronous rectifier in 5–24V input buck regulators for industrial sensors. IC Role / Device Role / Timing Role: Fast-switching NPN replacing Schottky diode to improve efficiency at >1A output. Use Value: ton/toff of 170ns/750ns and fT ≥100MHz support 500kHz+ switching with controlled rise/fall times. | Use Scenario: Inrush-limited 48V load switch for IEEE 802.3af/at powered devices. IC Role / Device Role / Timing Role: Controlled turn-on switch with soft-start via base resistor network. Use Value: Verified hFE ≥30 at 6A ensures reliable gate drive for external MOSFETs during hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25050DFHTA | Higher VCEO (60V), lower RCE(sat) (50mΩ @ 2A), SOT23-3 package (no thermal pad) | Limited to ≤1.5A continuous due to smaller package; unsuitable for 3A sustained loads | Select when board space is constrained and peak current ≤1.5A; avoid where thermal pad anchoring is required |
| MJD122T4G | Same SOT89 package, higher IC (8A), but VCE(sat) = 500mV @ 3A and no AEC-Q101 qualification | Not automotive-qualified; higher saturation loss increases thermal load by >1.1W at 3A | Prefer for cost-sensitive industrial use where AEC-Q101 is unnecessary and thermal margin exists |
Compared with ZXTN25050DFHTA and MJD122T4G, FCX619TA uniquely balances AEC-Q101 compliance, 3A continuous rating, and 87mΩ RCE(sat) in thermally optimized SOT89 - making it optimal for automotive and industrial 2–3A switched loads requiring long-term reliability and thermal predictability.
Availability
FCX619TA is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drivers, DC-DC converter synchronous rectification, and PoE-powered device load management requiring stable component supply and AEC-Q101 traceability.
Supply support for FCX619TA 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 consumer markets.
The FCX619TA belongs to Diodes' AEC-Q101-qualified power transistor product line, designed specifically for robust, thermally efficient switching in automotive body electronics and industrial motion control systems.
FAQ
What is the maximum allowable PCB copper area for FCX619TA to achieve 2.0W power dissipation?
The 2.0W rating requires the exposed collector pad to be soldered to a 40mm × 40mm (1600 mm²) area of 1oz copper on a single-sided FR-4 PCB, per Note 9 in DS33067. Smaller copper areas reduce power capability: 25mm × 25mm yields 1.5W, and minimum recommended pad layout gives only 0.7W.
Does FCX619TA support base-driven linear regulation, or is it intended only for switching?
FCX619TA is optimized for saturated switching, not linear regulation. Its hFE characterization extends to 6A, and VCE(sat) is specified only under pulsed conditions (≤300μs, ≤2% duty). Continuous linear operation risks thermal instability due to secondary breakdown limits not published in the datasheet.
How does the SOT89 pinout orientation affect PCB layout for thermal performance?
The SOT89 pinout places the collector on the large exposed pad (center), emitter on left, base on right in top view. Correct orientation ensures the collector pad connects directly to internal copper planes; reversed placement isolates the pad, increasing RθJA by >100°C/W and risking thermal failure at rated current.
Is FCX619TA compatible with lead-free reflow profiles, and what is its moisture sensitivity level?
Yes - FCX619TA has matte tin-plated leads and is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH without baking. It supports standard IPC/JEDEC J-STD-020D lead-free reflow profiles with peak temperature up to 260°C.
FCX619TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Vce Saturation (Max) @ Ib, Ic:
- 320mV @ 100mA, 2.75A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 2A, 2V
- Power - Max:
- 2 W
- Frequency - Transition:
- 165MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
FCX619TA FAQ
1.How can I place an order for FCX619TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FCX619TA 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 FCX619TA reliable?
The price and inventory of FCX619TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FCX619TA is usually 5 days.
3.What payment methods are accepted for FCX619TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FCX619TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FCX619TA?
FCX619TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FCX619TA 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 FCX619TA?
For technical support, including FCX619TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FCX619TA requirements.
6.How does Aetrix verify that FCX619TA is sourced from the original manufacturer or authorized distributors?
All FCX619TA 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 FCX619TA meets industry standards.
7.What is the process for return or replacement of FCX619TA?
All FCX619TA units undergo pre-shipment inspection (PSI). If there is an issue with FCX619TA, 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 FCX619TA part is unused and in its original packaging.
Return procedure for FCX619TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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