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BC817-25QAZ

Name: BC817-25QAZ
Rating: 4.7 (12 reviews)

TRANS NPN 45V 0.5A DFN1010D-3

製造商
製造商。部分 #BC817-25QAZ
包 3-XDFN Exposed Pad
資料表 BC817-25QAZ DataSheet
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規格

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

概述

Description

BC817-25QAZ is a small-signal NPN transistor in a SOT-23 package. It’s used for general switching and amplification in low- to medium-current circuits.
Key points
- Type: NPN bipolar transistor
- Package: SOT-23, 3 leads
- Vceo: ~45 V
- Ic: up to about 500 mA
- Power: roughly 0.3–0.5 W total dissipation (depends on mounting and conditions)
- Gain: hFE in the hundreds (bin dependent; varies with Ic and temperature)
- Temperature: typically −55 °C to around +125–150 °C
- Marking: “-25QAZ” refers to a gain/lot/assembly code; “BC817-25” indicates the gain bin, while “QAZ” is the manufacturing code
Typical uses
- General-purpose amplification and switching
- LED driving, relay drivers, small-signal stages
Notes
- Check the exact datasheet from your supplier for the precise hFE range, packaging options, and recommended operating conditions
- Substitutions (e.g., BC847/2N3904) can be possible with attention to voltage/current gain requirements

Features

Key features of BC817-25QAZ (general-purpose NPN transistor, TO-92):
- NPN, general-purpose transistor in TO-92 package
- Maximum collector current Ic: 500 mA
- Collector-emitter voltage Vceo: 45 V
- Power dissipation Ptot: ≈ 0.625 W (at 25°C)
- High current gain (hFE) with a wide tolerance (typical 100–320+ depending on Ic and temp)
- Temperature range: -55°C to +150°C
- RoHS-compliant/lead-free variant (BC817-25QAZ)
- Complementary to BC807 (PNP)
- Suitable for switching and amplification in low-power circuits
Note: For exact hFE curves and pinout, refer to the specific datasheet.

Package

TO-92 through-hole package.

Pinout

- Pin count: 3 pins.
- Pin functions (TO‑92 pinout, flat face toward you, leads down):
1 = Collector, 2 = Base, 3 = Emitter.
- Device function: BC817‑25QAZ is an NPN bipolar junction transistor (BC817 family, “‑25” gain group) used as a general‑purpose low‑voltage amplifier/switch (typically up to several hundred mA collector current).

Manufacturer

The BC817-25QAZ is a variant of the BC817 NPN transistor sold by multiple vendors; one commonly listed manufacturer is Diodes Incorporated. Diodes Incorporated is a global semiconductor company that designs and manufactures discrete semiconductors and ICs (diodes, transistors, logic and power-management devices) for consumer, industrial, automotive and communications applications.

Application

BC817-25QAZ is a general‑purpose NPN transistor used for switching and amplification in low‑power circuits. Typical applications:
- Interfacing microcontrollers and logic (level shifting and buffering)
- Small‑signal amplification in sensors or audio paths
- Driving low‑current loads (LEDs, relay drivers)
- Signal conditioning and demodulation stages
- Compact surface‑mount designs in consumer electronics and automotive sensors

Equivalent

Direct equivalents: BC817-25 from other manufacturers (ST, Nexperia, Vishay) or marked variants (BC817-25W / BC817-25Q). Close substitutes (check specs/pinout before use): BC337-25, 2N2222A / PN2222A. Verify Vce, Ic, hFE and package differences before substituting.