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Product Detailed Parameters
- Description：TRANS NPN 45V 0.5A SOT23-3
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Bulk
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：500 mA
- Voltage - Collector Emitter Breakdown (Max)：45 V
- Vce Saturation (Max) @ Ib, Ic：700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max)：100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce：250 @ 100mA, 1V
- Power - Max：300 mW
- Frequency - Transition：100MHz
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3 (TO-236)
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Overview
The BC817-40LT3 is a general-purpose NPN silicon transistor manufactured by onsemi, housed in an SOT-23 (TO-236) surface-mount package. It features a collector-emitter voltage of 45 V and a continuous collector current of 500 mA. The device provides a minimum DC current gain of 250 at 100 mA with a 1.0 V collector-emitter voltage. Its transition frequency is rated at 100 MHz, and it supports junction temperatures up to 150°C.
Feature Summary
- NPN silicon construction for general-purpose switching and amplification
- Low saturation voltage for efficient power handling
- Lead-free packaging compliant with environmental standards
Applications
- General-purpose switching circuits
- Amplifier stages
- Driver applications requiring moderate current
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm tape and reel specifications. Confirm that the component meets RoHS requirements if lead-free status is mandatory for the assembly process. Ensure the package dimensions align with the design footprint before finalizing procurement.
Selection Notes
Select this component when a standard NPN transistor with a 45 V rating and 500 mA capability is required. The BC817-40 variant offers higher current gain compared to lower-rated siblings. Consider thermal dissipation limits based on the PCB substrate material and ambient temperature conditions during operation.
Part Context
This part belongs to the BC817 series of general-purpose NPN transistors from onsemi. The series includes variants with different current gain ranges, such as BC817-16 and BC817-25. All share similar electrical ratings but differ in hFE classification to suit various circuit sensitivity requirements.
Replacement Considerations
BC817-40LT1G
FAQ
What is the maximum collector-emitter breakdown voltage?
The maximum collector-emitter breakdown voltage (V(BR)CEO) is 45 V.
What is the DC current gain range for the BC817-40?
The minimum DC current gain (hFE) is 250 when measured at IC = 100 mA and VCE = 1.0 V.
Is the BC817-40LT3 available in a lead-free package?
Yes, onsemi offers Pb-Free packages for the BC817 series, indicated by the 'G' suffix in ordering information.
