BC817-40-Q

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BC817-40-Q

TRANS NPN 45V 0.8A SOT23-3

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  • Mfr. Parte #BC817-40-Q
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  • En stock14547

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Especificaciones

Part Status Discontinued at DigiKey
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 TO-236-3, SC-59, SOT-23-3
Supplier Device Package SOT-23-3 (TO-236)
Packaging Cut Tape (CT), Tape & Reel (TR)
Grade Automotive
Qualification AEC-Q101

Descripción general

Description

BC817-40-Q is a RoHS-compliant general‑purpose NPN transistor from the BC817 family. The “-40” denotes its gain (hFE) group—mid/low gain compared with other BC817 variants.
Key points:
- Vceo ~ 45 V; Ic max about 0.4–0.5 A (typical small-signal switch/amp currents)
- hFE depends on Ic and temperature; for Ic around a few mA it often ranges roughly from 40 to 160
- Packages: available in through‑hole (TO‑92) and SMD (SOT‑23) variants, depending on vendor
- Uses: switching and low-power signal amplification in audio, sensor, LED-drive, and general purpose circuits
- “Q” indicates RoHS compliance
Note: exact hFE and packaging vary by supplier and lot; consult the specific datasheet for your component.

Features

BC817-40-Q features (general-purpose NPN transistor)
- NPN silicon, general-purpose switching/amplification
- Vceo: 45 V
- Ic: up to 500 mA
- Gain group: part of the BC817 family (-40 denotes the gain variant; actual hFE varies with Ic)
- Low Vce(sat) for switching
- Temperature range: typically -55 °C to +150 °C
- Package: TO-92 (through-hole); Pb-free/RoHS-compliant indicator with the “-Q” suffix
- Suitable for small-signal amplification and switching in consumer electronics
- Complementary to BC807 series (pNP)
Note: For exact hFE and switching specs, refer to the specific datasheet value for the -40-Q variant.

Package

SOT-23 (3-pin) surface-mount package.

Pinout

BC817-40-Q is a 3-pin SOT-23 NPN bipolar transistor used for general-purpose switching and amplification. Pinout (top view, flat face): Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector.

Manufacturer

- Manufacturer: Nexperia.
- What kind of company: A global semiconductor company specializing in discrete components (transistors, diodes), logic devices, and MOSFETs; originated from Philips Semiconductors/NXP and now an independent supplier.

Application

BC817-40-Q is a general-purpose NPN transistor for switching and small-signal amplification. Typical applications: driving relays/LEDs and other loads from logic; buffering and level-shifting in signal paths; small-signal preamplifiers in audio or sensor circuits; automotive/industrial control circuits (Q-grade). Specs: Vce up to ~45 V and Ic up to ~0.5 A.

Equivalent

Equivalent SMD substitutes (NPN, 45V class, in SOT-23):
- MMBT3904
- MMBT2222A
- MMBT4401
From major vendors (NXP/Nexperia, On Semi, Fairchild, Diodes Inc). Check exact Vce, Ic and hFE in datasheets and confirm pinout (E-B-C) for your design.

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