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Diodes Incorporated FCX495QTA
- Part No.:
- FCX495QTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
FCX495QTA.pdf
- Description:
- TRANS NPN 150V 1A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,463
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Product details
Overview
FCX495QTA from Diodes Incorporated is a 150V NPN medium-power bipolar junction transistor in SOT89 package, rated for 1A continuous collector current, VCE(sat) < 300 mV at 500 mA, and qualified to AEC-Q101 for automotive-grade reliability. It serves as a high-voltage, low-loss power switch in DC-DC converters and motor control stages.
For engineers reviewing the FCX495QTA datasheet, FCX495QTA pinout, FCX495QTA application, or FCX495QTA equivalent, key selection criteria include breakdown voltage (VCEO = 150 V), saturation performance under 500 mA load, thermal resistance (RθJL = 10.01 °C/W), and AEC-Q101 qualification status for automotive deployment.
Technical Context
This NPN BJT operates in linear or switching mode with guaranteed VCEO ≥ 150 V and VCBO ≥ 170 V, enabling use in 12 V–48 V automotive supply rails where transient overvoltage immunity is critical. Its hFE ranges from 100 to 300 across IC = 1 mA to 1 A, supporting both low-current biasing and high-current switching.
The device features an exposed collector pad thermally coupled to PCB copper, delivering RθJL = 10.01 °C/W - significantly lower than standard SOT89 thermal resistance - and supports pulsed operation up to ICM = 2 A with 2% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 150 V - Withstands 150 V collector-emitter blocking voltage, suitable for 48 V automotive systems with margin. |
| IC (continuous) | 1 A - Supports sustained switching of loads up to 1 A without derating at TA ≤ 25°C. |
| VCE(sat) | < 300 mV @ 500 mA / 50 mA - Enables low conduction loss in high-side or low-side switch configurations. |
| hFE | 100–300 - Provides stable current gain across operating range, easing base drive design for discrete switching circuits. |
| RθJL | 10.01 °C/W - Low junction-to-lead thermal resistance enables efficient heat transfer to PCB copper via exposed collector pad. |
| fT | 100 MHz - Supports switching frequencies up to several MHz in PWM-driven applications like LED drivers or SMPS pre-regulators. |
Pinout & Package
Package: SOT89 - surface-mount plastic package with exposed collector pad for enhanced thermal dissipation; UL 94V-0 rated molding compound; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | Main current-carrying terminal (exposed pad) | Electrically and thermally connected to PCB copper pour; primary heat path to board. |
| Emitter (E) | Current return path | Low-impedance emitter connection for grounding or load return; referenced in VCE(sat) measurement. |
| Base (B) | Control input | Receives current-limited drive signal; requires ~50 mA for full saturation at 500 mA collector load. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature range (−65°C to +150°C) and mechanical stress, enabling use in engine control and body electronics. |
| Lead-free & halogen-free "Green" construction | Complies with RoHS 3 (2015/863/EU); Br+Cl < 1500 ppm, Sb < 1000 ppm - meets Tier 1 automotive material declarations. |
| Low VCE(sat) at high current | VCE(sat) ≤ 300 mV @ IC = 500 mA ensures <150 mW conduction loss, reducing thermal load in compact layouts. |
| SOT89 thermal performance | RθJL = 10.01 °C/W enables >800 mW usable power dissipation on 15 mm × 15 mm 1 oz copper - double typical SOT89 capability. |
Applications
| Automotive Body Control Module | Industrial 24 V DC Power Switch |
|---|---|
Use Scenario: Driving solenoids, relays, and LED arrays in door modules and lighting controllers. IC Role / Device Role / Timing Role: NPN power switch controlling 12–24 V loads with fast turn-on/off and low dropout. Use Value: VCEO = 150 V provides 6× margin over 24 V rail transients; AEC-Q101 rating ensures field reliability. | Use Scenario: High-side switching of 24 V industrial actuators and sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Discrete NPN switch replacing integrated load switches where cost and thermal headroom are critical. Use Value: RθJL = 10.01 °C/W allows direct mounting to heatsink pads, eliminating need for external thermal vias. |
| Automotive HVAC Blower Control | DC-DC Converter Pre-regulator |
Use Scenario: PWM-controlled blower motor driver in climate control units. IC Role / Device Role / Timing Role: Medium-power switching element in discrete H-bridge or single-ended topology. Use Value: fT = 100 MHz supports clean PWM edges up to 500 kHz, minimizing switching losses and EMI. | Use Scenario: Input stage switch in non-isolated buck pre-regulators for infotainment power supplies. IC Role / Device Role / Timing Role: High-voltage NPN switch handling 48 V input before synchronous rectification. Use Value: VCBO = 170 V withstands load-dump spikes per ISO 7637-2, avoiding secondary protection components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX653 | VCEO = 100 V, hFE = 100–300, SOT89 package, no AEC-Q101 qualification | Limited to 24 V systems; not approved for automotive production | Select only for cost-sensitive industrial prototypes without automotive compliance requirements. |
| MJD127 | VCEO = 100 V, IC = 2 A, TO-252 package, higher RθJA = 60 °C/W | Better current rating but larger footprint and inferior thermal coupling to PCB | Prefer when peak current >1 A is required and board space permits TO-252 layout. |
Compared with ZTX653 and MJD127, FCX495QTA uniquely combines 150 V rating, AEC-Q101 qualification, and optimized SOT89 thermal performance - making it the only choice for space-constrained, high-reliability 48 V automotive switching.
Availability
FCX495QTA is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24 V power switching, HVAC blower control, and DC-DC converter pre-regulators requiring stable component supply and long-term lifecycle support.
Supply support for FCX495QTA 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 FCX495QTA belongs to Diodes' automotive-qualified bipolar transistor product line, engineered specifically for high-voltage, high-reliability power switching in harsh-environment vehicle subsystems.
FAQ
What is the maximum safe operating voltage for FCX495QTA in continuous DC applications?
The FCX495QTA has a guaranteed VCEO of 150 V and VCBO of 170 V. For continuous DC operation, the recommended maximum collector-emitter voltage is 120 V to maintain safety margin against transients and temperature drift. This aligns with ISO 7637-2 load-dump immunity requirements in 48 V automotive systems.
Does FCX495QTA require a heatsink in typical SOT89 PCB layouts?
No external heatsink is required when mounted on a 15 mm × 15 mm single-sided 1 oz copper area. At 1 A continuous current and 25°C ambient, junction temperature rise is ~100°C (PD ≈ 0.3 W × 10.01 °C/W), staying within the −65°C to +150°C operating range. Thermal vias under the exposed collector pad further improve performance.
Can FCX495QTA be used in linear amplifier configurations?
Yes - its hFE stability (100–300) and fT = 100 MHz support Class-A or AB audio pre-amplifier stages up to ~10 MHz. However, power dissipation must be strictly limited: at VCE = 10 V and IC = 100 mA, PD = 1 W exceeds the 1 W absolute max rating unless derated per the datasheet curve - use only with active thermal management.
Is FCX495QTA PPAP-capable for automotive production programs?
Yes - Diodes Incorporated confirms PPAP capability for FCX495QTA per AIAG standards. Full PPAP documentation (including PSW, control plan, MSA, and process flow) is available upon request for qualified automotive customers, supporting Tier 1 supplier audits and OEM launch readiness.
FCX495QTA 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):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 150 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 250mA, 10V
- Power - Max:
- 1 W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
FCX495QTA FAQ
1.How can I place an order for FCX495QTA through Aetrix?
Please submit a Request for Quotation (RFQ) for FCX495QTA 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 FCX495QTA reliable?
The price and inventory of FCX495QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FCX495QTA is usually 5 days.
3.What payment methods are accepted for FCX495QTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FCX495QTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FCX495QTA?
FCX495QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FCX495QTA 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 FCX495QTA?
For technical support, including FCX495QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FCX495QTA requirements.
6.How does Aetrix verify that FCX495QTA is sourced from the original manufacturer or authorized distributors?
All FCX495QTA 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 FCX495QTA meets industry standards.
7.What is the process for return or replacement of FCX495QTA?
All FCX495QTA units undergo pre-shipment inspection (PSI). If there is an issue with FCX495QTA, 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 FCX495QTA part is unused and in its original packaging.
Return procedure for FCX495QTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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