仕様
| 属性 | 値 |
| Supplier | Nexperia USA Inc. |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| Series | Automotive, AEC-Q101 |
| ProductStatus | Active |
| TransistorType | NPN |
| Current-Collector(Ic)(Max) | 200 mA |
| Voltage-CollectorEmitterBreakdown(Max) | 40 V |
| VceSaturation(Max)@IbIc | 300mV @ 5mA, 50mA |
| Current-CollectorCutoff(Max) | 50nA (ICBO) |
| DCCurrentGain(hFE)(Min)@IcVce | 100 @ 10mA, 1V |
| Power-Max | 250 mW |
| Frequency-Transition | 300MHz |
| OperatingTemperature | 150°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | TO-236-3, SC-59, SOT-23-3 |
概要
Description
MMBT3904 is the surface-mount version of the classic NPN transistor 2N3904. It’s a general‑purpose, low‑power switch/amplifier device in an SOT‑23 package.
Key specs (typical):
- Vceo: 40 V; Ic max: 200 mA
- Ptot: ~300 mW
- hFE: ~100–300 (depends on Ic and manufacturer)
- fT: ~300 MHz
- Temperature range: -55 to +150 °C
Pinout (SOT‑23, view from top): Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector (E–B–C).
Common uses: small-signal amplification, switching, level shifting, microcontroller interfacing in compact boards.
Notes:
- “215” in a part number or marking is typically a lot/date code variant; verify exact electrical specs in the datasheet for your device.
- For saturation when used as a switch, provide adequate base drive (roughly Ic/10 as a starting rule).
In short: a widely available, inexpensive NPN transistor suitable for many hobby and small‑signal applications.
Key specs (typical):
- Vceo: 40 V; Ic max: 200 mA
- Ptot: ~300 mW
- hFE: ~100–300 (depends on Ic and manufacturer)
- fT: ~300 MHz
- Temperature range: -55 to +150 °C
Pinout (SOT‑23, view from top): Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector (E–B–C).
Common uses: small-signal amplification, switching, level shifting, microcontroller interfacing in compact boards.
Notes:
- “215” in a part number or marking is typically a lot/date code variant; verify exact electrical specs in the datasheet for your device.
- For saturation when used as a switch, provide adequate base drive (roughly Ic/10 as a starting rule).
In short: a widely available, inexpensive NPN transistor suitable for many hobby and small‑signal applications.
Equivalent
MMBT3904 is the SMD equivalent of the popular 2N3904 NPN small‑signal transistor. Direct equivalents: 2N3904 (TO‑92), MMBT3904 (SOT‑23) from manufacturers like ON Semiconductor, Diodes Inc., Nexperia, etc. Close substitutes with similar specs (Vce ≈40 V, Ic ≈200 mA, hFE ≈100) include BC547/BC548 (pinout differs) and PN2222A/MMBT2222A (higher current). Check pinout and package before substituting.
Features
MMBT3904 is a general-purpose NPN transistor in an MMBT (SOT-23) package. Key features:
- Vceo: 40 V
- Ic: up to 200 mA
- hFE: roughly 100–300 (depends on Ic and temperature)
- Vce(sat): ~0.2–0.3 V at modest drive (e.g., Ic ≈ 10 mA, Ib ≈ 1 mA)
- fT: hundreds of MHz (typical)
- Temperature range: -55°C to +150°C
- Package: surface-mount, RoHS/Pb-free (vendor dependent)
- Applications: general switching and small-signal amplification (2N3904 equivalent)
Note: exact specs vary by manufacturer and lot.
- Vceo: 40 V
- Ic: up to 200 mA
- hFE: roughly 100–300 (depends on Ic and temperature)
- Vce(sat): ~0.2–0.3 V at modest drive (e.g., Ic ≈ 10 mA, Ib ≈ 1 mA)
- fT: hundreds of MHz (typical)
- Temperature range: -55°C to +150°C
- Package: surface-mount, RoHS/Pb-free (vendor dependent)
- Applications: general switching and small-signal amplification (2N3904 equivalent)
Note: exact specs vary by manufacturer and lot.
Pinout
MMBT3904 (MMBT3904,215) is a 3‑pin device (SOT‑23 package). Function: it is an NPN bipolar junction transistor for general‑purpose switching and amplification. The three pins are the Base (B), Collector (C) and Emitter (E); exact pin‑number ordering on the SOT‑23 package can vary by manufacturer, so consult the specific part datasheet for the device pin‑number mapping and package view.
Application
MMBT3904 is a general-purpose NPN transistor (SOT-23) suitable for low-power switching and amplification. Common applications include:
- Switching: drive relays, LEDs, small inductive loads.
- Digital/logic interfacing: microcontroller I/O, level shifting.
- Small-signal amplification: audio preamps, sensor signal conditioning.
- Analog circuits: oscillators, timers, simple amplifiers.
- Prototyping and education: breadboard/prototyping circuits and general-purpose small-signal tasks.
Note: typical ratings ~40 V Vce and up to ~200 mA Ic.
- Switching: drive relays, LEDs, small inductive loads.
- Digital/logic interfacing: microcontroller I/O, level shifting.
- Small-signal amplification: audio preamps, sensor signal conditioning.
- Analog circuits: oscillators, timers, simple amplifiers.
- Prototyping and education: breadboard/prototyping circuits and general-purpose small-signal tasks.
Note: typical ratings ~40 V Vce and up to ~200 mA Ic.
Package
SOT-23 (SOT-23-3) package—3-pin surface-mount version of the 2N3904.
