BC817-40

STMicroelectronics

1 NPN 100MHz 250mW 45V 500mA 5V 5uA 600 700mV NPN SOT-23 Bipolar (BJT) ROHS

Extended

Category: Bipolar (BJT)
Package: SOT-23
Pins: 3

Overview

The BC817-40 is a bipolar made by STMicroelectronics in a SOT-23 package with 3 pins. 1 NPN 100MHz 250mW 45V 500mA 5V 5uA 600 700mV NPN SOT-23 Bipolar (BJT) ROHS.

PCBKit's library has its KiCad symbol (Transistor_BJT:BC817, from KiCad's library) and its footprint (Package_TO_SOT_SMD:SOT-23, from KiCad's library), ready for a KiCad board. 13,933 are in stock at JLCPCB (part C85078).

Symbol

Transistor_BJT:BC817From KiCad's library

Footprint

Package_TO_SOT_SMD:SOT-23From KiCad's library

From the datasheet

Collector-emitter, most: 45 V · Collector-emitter voltage max, IB = 0 · p. 1
Collector current, most: 500 mA · Continuous collector current max · p. 1
Junction, hottest: 150 °C · Operating junction temperature max · p. 1
Current gain, least: 250 · DC current gain min, IC = 100 mA, VCE = 1 V · p. 2
Junction to air (SOT-23): 500 K/W · Junction-ambient thermal resistance max, PCB area 1 cm² · p. 2

What it is and has

Transistor type: Silicon epitaxial planar NPN · p. 1
Package: SOT-23 plastic · p. 1
Packing: Tape and reel · p. 1
Marking: 6C · p. 1

Specifications

Parameter	Conditions	As printed	Page
Collector-Base Voltage (I E = 0) V CBO		max 50 V	1
Collector-Emitter Voltage (I B = 0) V CEO		max 45 V	1
Collector Current IC		max 0.5 A	1
Collector Peak Current I CM		max 1 A	1
Total Dissipation at T C = 25 C P tot	TC = 25 °C	max 250 mW	1
Storage Temperature T stg		min -65 · max 150 °C	1
Max. Operating Junction Temperature Tj		max 150 °C	1
Thermal Resistance Junction-Ambient R thj-amb	SOT-23; device mounted on a PCB area of 1 cm²	max 500 °C/W	2
Collector Cut-off Current (I E = 0) I CBO	VCB = 20 V; Tcase = 25 °C	max 100 nA	2
Collector Cut-off Current (I E = 0) I CBO	VCB = 20 V; TC = 150 °C	max 5 uA	2
Emitter Cut-off Current (I E = 0) I EBO	VEB = 5 V; Tcase = 25 °C	max 100 nA	2
Collector-Emitter Breakdown Voltage (I B = 0) V (BR)CEO	IC = 10 mA; Tcase = 25 °C; pulsed	min 45 V	2
Collector-Emitter Saturation Voltage V CE(sat)	IC = 500 mA; IB = 50 mA; Tcase = 25 °C; pulsed	max 0.7 V	2
Base-Emitter On Voltage V BE(on)	IC = 500 mA; VCE = 1 V; Tcase = 25 °C; pulsed	max 1.2 V	2
DC Current Gain h FE	BC817-40; IC = 100 mA; VCE = 1 V; Tcase = 25 °C; pulsed	min 250	2
Transition Frequency fT	IC = 10 mA; VCE = 5 V; f = 100 MHz; Tcase = 25 °C	min 100 MHz	2

Parameters

Collector - Emitter Voltage VCEO: 45V
Configuration: Standalone
Current - Collector Cutoff: 5uA
Current - Collector(Ic): 500mA
DC Current Gain: 250
Emitter-Base Voltage(Vebo): 5V
Junction Temperature(Max): 150℃
Number: 1 NPN
Pd - Power Dissipation: 250mW
Thermal Resistance(Junction to Ambient): 500℃/W
Transition frequency(fT): 100MHz
Vce Saturation(VCE(sat)): 700mV
type: NPN

Order codes

BC817-40LCSC C85078

Pinout

The pins of the BC817-40
Pin	Name	Type
1	B	Input
2	E	Passive
3	C	Passive

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Questions

Is there a KiCad symbol and footprint for the BC817-40?

Yes. The symbol is Transistor_BJT:BC817 and the footprint Package_TO_SOT_SMD:SOT-23, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the BC817-40?

SOT-23, with 3 pins. Its footprint is drawn on this page.

Where is the BC817-40 datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the BC817-40?

JLCPCB lists it as part C85078, with 13,933 in stock; the sellers' links on this page open their listings.

What can replace the BC817-40?

Parts like it in the library: the S8050 by hongjiacheng, the SS8050 by hongjiacheng, the MMBT5551 by hongjiacheng and the MMBT5401 by hongjiacheng. Check their datasheets: a part that fits the footprint may still differ in its ratings.