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| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
2,000 pcs
|
2000 pcs | On Request | 1 | On Request | On Request | 20+ | On Request | On Request |
| Category | |
| Manufacturer Name | |
| AEC Qualified | |
| Automotive Grade | |
| Base Current | |
| Collector-Base Breakdown Voltage | |
| Current | |
| DC Current Gain (hFE) (Min) @ Ic, Vce | |
| Emitter-Base Breakdown Voltage | |
| Frequency | |
| Halogen Free | |
| Mounting Type | |
| Operating Temperature | |
| PD (Maximum @ TA=+25 °C, device mounted on FR 4 PCB with 1 oz copper, min pad layout) | |
| Peak Pulse Current | |
| Power | |
| Quantity Per Reel | |
| Reel Size | |
| SVHC Present | |
| Storage Temperature | |
| Supplier Device Package | |
| Tape & Reel | |
| Tape Width | |
| Termination Finish | |
| Thermal Resistance Junction to Ambient (@ Note 6) | |
| Thermal Resistance, Junction to Lead | |
| Transistor Type | |
| Vce Saturation (Max) @ Ib, Ic | |
| Voltage |
The FZT491ATA is an NPN medium power transistor manufactured by Diodes Incorporated. It is designed for general purpose switching and amplification applications requiring up to 40V and 1A.
Key electrical characteristics include a minimum DC current gain (hFE) of 300 at 500mA collector current and 5V VCE, and a maximum collector-emitter saturation voltage of 500mV at 1A collector current. The transistor offers a transition frequency of 150 MHz, making it suitable for moderate speed switching. It can handle peak pulse currents up to 2A.
The device is housed in a surface-mount SOT-223 package (also known as TO-261-4 or TO-261AA) with matte tin plated leads. It is rated for a junction temperature range of -55°C to 150°C. Power dissipation depends on PCB mounting conditions: up to 3.0W on a standard FR4 board with minimum pad layout, and 2.0W with a 1 inch² copper pad. Thermal resistance from junction to ambient is typically 41.7°C/W under minimum pad conditions.
The FZT491ATA is RoHS3 compliant, halogen and antimony free, and qualified to AEC-Q101 standards for automotive applications. It is suitable for power MOSFET gate driving and low loss power switching. The complementary PNP type is FZT591A.
| Qty | Low | High |
|---|---|---|
| 1+ | $1.32 | $1.32 |
| 10+ | $0.62 | $0.62 |
| 100+ | $0.54 | $0.54 |
| 500+ | $0.47 | $0.47 |
| 1,000+ | $0.38 | $0.38 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
Minimum 40V.
SOT-223 (TO-261-4, TO-261AA).
-55°C to 150°C.
Yes, it is RoHS3 compliant with lead-free finish.
Minimum 300 at 500mA collector current and 5V VCE.
150 MHz typical.
1A continuous, 2A peak pulse.