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Product Detailed Parameters
- Description：TRANS NPN 45V 0.8A SOT23-3
- Series：-
- Mfr：Diotec Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：800 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：310 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)
- Grade：-
- Qualification：-
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Overview
The Diotec Semiconductor BC817-40 is a general-purpose NPN bipolar junction transistor (BJT) designed for surface-mount applications. It features a collector-emitter voltage (VCEO) of 45 V and a maximum DC collector current (IC) of 800 mA. The device operates within a junction temperature range of -55°C to +150°C with a power dissipation rating of 310 mW. It offers a minimum DC current gain (hFE) of 250 at IC = 100 mA and VCE = 1 V, alongside a transition frequency (fT) of 100 MHz.
Feature Summary
- General-purpose NPN transistor suitable for signal processing, switching, and amplification tasks
- Three distinct current gain groups available, including the -40 group with hFE min 250
- Compliant with RoHS directives without exemption and REACH regulations
Applications
- Signal processing circuits
- Electronic switching applications
- Amplification stages
Procurement Notes
Verify that the ordered component matches the specific manufacturer part number BC817-40 from Diotec Semiconductor. Confirm compliance requirements such as RoHS and REACH status directly against the official datasheet documentation provided by the manufacturer before finalizing procurement decisions.
Selection Notes
Select this component when an NPN BJT with a 45 V collector-emitter breakdown voltage and up to 800 mA continuous collector current is required. Ensure the design accommodates the specified 310 mW power dissipation limit and verify that the SOT-23 package dimensions fit the intended PCB layout constraints.
Part Context
This component belongs to the BC817 series of SMD general-purpose NPN transistors manufactured by Diotec Semiconductor. The series includes complementary PNP variants like the BC807 and other NPN models with varying gain groups (-16, -25). The BC817-40 specifically denotes the industrial grade version with a minimum hFE of 250.
Replacement Considerations
BC817-40R13
FAQ
What is the marking code for the BC817-40?
The marking code for the BC817-40 is 6C or 6CT.
Does the BC817-40 have an automotive qualification suffix?
No, the standard BC817-40 does not include an automotive suffix. Automotive versions are designated with suffixes such as -Q or -AQ.
What is the typical thermal resistance (RthA) for this device?
The typical thermal resistance from junction to ambient is 420 K/W, measured when mounted on a PCB with 3 mm² copper pads at each terminal.
