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BC817-40QAZ

Name: BC817-40QAZ
Rating: 4.7 (12 reviews)

TRANS NPN 45V 0.5A DFN1010D-3

제조업체
Mfr.부분 #BC817-40QAZ
패키지 3-XDFN Exposed Pad
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사양

Supplier	Nexperia USA Inc.
Package	Tape & Reel (TR),Cut Tape (CT)
Series	Automotive, AEC-Q101
ProductStatus	Active
TransistorType	NPN
Current-Collector(Ic)(Max)	500 mA
Voltage-CollectorEmitterBreakdown(Max)	45 V
VceSaturation(Max)@IbIc	700mV @ 50mA, 500mA
Current-CollectorCutoff(Max)	100nA (ICBO)
DCCurrentGain(hFE)(Min)@IcVce	40 @ 500mA, 1V
Power-Max	900 mW
Frequency-Transition	100MHz
OperatingTemperature	150°C (TJ)
MountingType	Surface Mount
Package/Case	3-XDFN Exposed Pad

개요

Description

BC817-40QAZ is a general‑purpose NPN transistor in the BC817 family. It is a small-signal device used for low‑power switching and amplification in hobbyist and commercial circuits. The suffix QAZ denotes a lead‑free, RoHS‑compliant variant (package/lot code with a TO‑92 style through‑hole form). The “-40” indicates the gain (hFE) group for this device, i.e., a relatively low‑to‑moderate gain range, with actual hFE depending on collector current and temperature.
Typical specs (datasheet values, vary by lot):
- Vceo ≈ 45 V
- Ic up to ≈ 500 mA
- Ptot on the order of a few hundred milliwatts when properly heat-sunk
Common uses include signal amplification, small‑signal switching, and biasing networks. For exact hFE at your operating current and the precise packaging details, consult the specific datasheet for BC817-40QAZ.

Features

BC817-40QAZ is a general‑purpose NPN transistor. Key features:
- Package: SMD (likely SOT‑23) with QAZ code
- Ic max: 500 mA
- Vceo: 45 V
- VeBo: 6 V
- Power dissipation: ≈ 250 mW (typical for SOT‑23)
- High DC current gain (hFE, group -40) suitable for amplification and switching
- Low Vce(sat) (good for switching applications)
- Temperature range: -55°C to +150°C
- RoHS compliant, Pb‑free
Use cases: general switching and signal amplification in low-power analog/digital circuits.

Package

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

Pinout

- Pin count: 3 (SOT-23 package)
- Function: General-purpose NPN transistor (used for switching and amplification)
- Pinout (flat face, leads down): Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector

Manufacturer

Manufacturer: Diodes Incorporated.
What kind of company: Diodes Incorporated is a global semiconductor company that designs and supplies discrete semiconductors, power-management devices, analog and logic ICs (for consumer, computing, communications and industrial markets).

Application

BC817-40QAZ is a general‑purpose NPN transistor. Common applications:
- Low‑power switching and small-signal amplification
- Relay/solenoid driver stages
- Microcontroller interfacing: level shifting and buffering
- LED indicator drivers and small LED applications
- Audio, sensing, and instrumentation signal conditioning
- Light automotive/industrial electronics within its voltage/current ratings
(Usual specs: Vceeo ~ 45 V, Ic up to ~500 mA; used as a BC547/2N3904 replacement in many circuits.)

Equivalent

BC817-40QAZ is a general‑purpose NPN transistor in SOT‑23. Common cross references (equivalents) include:
- BC847B (Nexperia)
- MMBT3904 / MMBT3904LT1G (ON Semiconductor / TI / Diodes Inc)
- MMUN3904 / MMDT3904 variants (Diodes Inc)
- 2N3904 in SMD form (MMBT3904)
Note: BC817-40 has higher Ic (~0.5 A) than many 3904 variants; verify Ic, Vce and hFE in your substitute.