FCX491ATA Diodes Inc. Transistor BJT NPN (Other) In Stock
Diodes Inc. FCX491ATA is a single NPN bipolar junction transistor rated at 1 A collector current and 40 V collector-emitter voltage in a compact 4-pin SOT-89 package. With a minimum DC current gain (hFE) of 35, it delivers efficient switching and amplification in power management circuits. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Diodes Inc.
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- FCX491ATA Datasheet PDF
- Category
- Transistor BJT NPN
- Price
- From $0.1651(MOQ 10)
- Temp Range
- ?°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- NPN BJT rated at 1 A collector current and 40 V VCE(max) for medium-power switching and amplification
- Minimum DC current gain (hFE) of 35 enables reliable base-drive calculations in switching and linear circuit designs
- Compact 4-pin SOT-89 package with collector tab provides efficient thermal dissipation for power-conscious PCB layouts
Applications
The FCX491ATA is commonly used in DC motor driver stages, relay driver circuits, and low-side switching applications where a 1 A NPN transistor in a compact SMT package is required. Its 40 V voltage rating makes it suitable for 12 V to 24 V automotive and industrial control circuits needing dependable signal amplification. The SOT-89 package with collector connection to the tab allows improved heat dissipation in space-constrained designs.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 12Weeks |
| YTEOL | 7 |
| Case Connection | COLLECTOR |
| Collector Current-Max (IC) | 1A |
| Collector-Emitter Voltage-Max | 40V |
| Configuration | SINGLE |
| DC Current Gain-Min (hFE) | 35 |
| JESD-30 Code | R-PSSO-F3 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity/Channel Type | NPN |
| Power Dissipation-Max (Abs) | 1W |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Terminal Finish | MATTE TIN |
| Terminal Form | FLAT |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transistor Application | SWITCHING |
| Transistor Element Material | SILICON |
| Transition Frequency-Nom (fT) | 150MHz |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the maximum collector current and voltage ratings of the FCX491ATA?
The FCX491ATA has a maximum collector current (IC) of 1 A and a maximum collector-emitter voltage (VCE) of 40 V. These ratings make it suitable for switching loads up to 1 A in circuits operating from 5 V to 24 V supply rails, covering a wide range of low to medium power applications in industrial and consumer electronics.
How does the 4-pin SOT-89 package of the FCX491ATA aid thermal management?
The 4-pin SOT-89 package of the FCX491ATA connects the collector terminal to the exposed tab on the package underside, which improves heat transfer to the PCB copper pour by providing a direct thermal path. This collector-tab configuration allows the transistor to handle up to 1 A of continuous collector current with better junction temperature control compared to smaller 3-pin SOT-23 packages.
Which application circuits benefit most from the FCX491ATA's hFE characteristics?
The FCX491ATA offers a minimum DC current gain (hFE) of 35, which simplifies base resistor calculations in relay coil driver circuits, solenoid actuators, and LED array switches operating at up to 1 A load current. The well-defined minimum hFE allows engineers to confidently design base drive networks with predictable saturation performance in 5 V to 24 V logic-controlled switching stages.
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About Diodes Inc.
Diodes Inc. is a leading electronic component manufacturer. FindMyChip sources Diodes Inc. ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
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Diode
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $0.5880 | $5.88 |
| 100+ | $0.3250 | $32.50 |
| 250+ | $0.2880 | $72.00 |
| 500+ | $0.2500 | $125.00 |
| 3000+ | $0.2450 | $735.00 |
| 4000+ | $0.1651 | $660.20 |
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