仕様
| 属性 | 値 |
| Supplier | DComponents |
| Package | Strip |
| ProductStatus | Active |
| TransistorType | PNP |
| Current-Collector(Ic)(Max) | 100 mA |
| Voltage-CollectorEmitterBreakdown(Max) | 30 V |
| VceSaturation(Max)@IbIc | 650mV @ 5mA, 100mA |
| Current-CollectorCutoff(Max) | 15nA (ICBO) |
| DCCurrentGain(hFE)(Min)@IcVce | 220 @ 2mA, 5V |
| Power-Max | 250 mW |
| Frequency-Transition | 100MHz |
| OperatingTemperature | -55°C ~ 150°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | TO-236-3, SC-59, SOT-23-3 |
概要
Description
BC859B is a small-signal NPN transistor from the BC859 family (low-noise, general purpose). The “B” denotes the mid-gain group. It’s used for amplification and switching in analog circuits, especially where low noise matters. Typical ratings (vendor dependent): Ic up to about 100 mA, Vceo around 45 V. Available in both through-hole TO-92 and surface-mount SOT-23 packages. Complement is BC860 (PNP). Common applications: audio preamps, signal amplifiers, and fast switching. For exact hFE range, breakdown voltages, and package options, consult the supplier’s datasheet.
Equivalent
Equivalent parts for BC859B (NPN small-signal, low-noise):
- Same family: BC859A/B/C (TO-92)
- SMD variants: MMBT859B / MMBT859; BC846S / BC847S / BC849S
- Through-hole substitutes: 2N3904, BC547 (pinout/hFE vary; verify datasheet)
Note: check pinout and hFE range for a valid swap.
- Same family: BC859A/B/C (TO-92)
- SMD variants: MMBT859B / MMBT859; BC846S / BC847S / BC849S
- Through-hole substitutes: 2N3904, BC547 (pinout/hFE vary; verify datasheet)
Note: check pinout and hFE range for a valid swap.
Features
BC859B features:
- PNP, general‑purpose, low‑noise small‑signal transistor
- Package: SOT‑23 (3 leads)
- Vceo: 80 V; Ic max: 50 mA
- Gain: hFE group B (medium to high) around 200–320 at Ic ≈ 2 mA
- Temperature range: −55 °C to +125 °C
- Low noise suitable for audio/RF front‑ends
- Complementary to BC849 (NPN)
- Pb‑free / RoHS compliant
Note: Check the exact hFE and maximum ratings in the datasheet for your operating conditions.
- PNP, general‑purpose, low‑noise small‑signal transistor
- Package: SOT‑23 (3 leads)
- Vceo: 80 V; Ic max: 50 mA
- Gain: hFE group B (medium to high) around 200–320 at Ic ≈ 2 mA
- Temperature range: −55 °C to +125 °C
- Low noise suitable for audio/RF front‑ends
- Complementary to BC849 (NPN)
- Pb‑free / RoHS compliant
Note: Check the exact hFE and maximum ratings in the datasheet for your operating conditions.
Pinout
- Pin count: 3 pins (SOT-23-3 package)
- Function: BC859B is a PNP general-purpose small-signal transistor (gain group B) used for amplification and switching in low-power circuits.
- Function: BC859B is a PNP general-purpose small-signal transistor (gain group B) used for amplification and switching in low-power circuits.
Manufacturer
Manufacturer: Nexperia.
What kind of company: Nexperia is a global semiconductor manufacturer (headquartered in the Netherlands) that designs and produces discrete semiconductors, logic ICs and MOSFETs — including small-signal transistors like the BC859B. (Note: the BC859B is a common PNP small-signal transistor also sold under the same part number by other semiconductor vendors such as ON Semiconductor and STMicroelectronics.)
What kind of company: Nexperia is a global semiconductor manufacturer (headquartered in the Netherlands) that designs and produces discrete semiconductors, logic ICs and MOSFETs — including small-signal transistors like the BC859B. (Note: the BC859B is a common PNP small-signal transistor also sold under the same part number by other semiconductor vendors such as ON Semiconductor and STMicroelectronics.)
Application
- General-purpose low-noise PNP transistor for small-signal amplification
- Emitter-follower buffers and input/driver stages in audio and instrumentation
- Microphone preamps and other low-noise signal paths
- Small-signal switching and level-shift stages
- Sensor, detector, and general-purpose amplification in portable/consumer electronics (complementary to NPN BC847 family)
- Emitter-follower buffers and input/driver stages in audio and instrumentation
- Microphone preamps and other low-noise signal paths
- Small-signal switching and level-shift stages
- Sensor, detector, and general-purpose amplification in portable/consumer electronics (complementary to NPN BC847 family)
Package
The BC859B is a small-signal PNP transistor typically offered in 3‑pin packages: through‑hole TO‑92 and surface‑mount SOT‑23. The "B" denotes the hFE gain group—refer to the manufacturer's datasheet for exact dimensions and ordering codes.
