Specifications
| Attribute | Value |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Obsolete |
| Transistor Type | PNP |
| Current - Collector(Ic)(Max) | 100 mA |
| Voltage - Collector Emitter Breakdown(Max) | 45 V |
| Vce Saturation(Max) @ Ib Ic | 650mV @ 5mA, 100mA |
| Current - Collector Cutoff(Max) | 15nA (ICBO) |
| DC Current Gain(h FE)(Min) @ Ic Vce | 200 @ 2mA, 5V |
| Power - Max | 310 mW |
| Frequency - Transition | 150MHz |
| Operating Temperature | 150°C (TJ) |
| Mounting Type | Surface Mount |
Overview
Equivalent
Equivalent products to the BC857BMTF (PNP transistor, SOT-23) include:
- BC856BMTF (similar specs, lower current)
- 2N3906 (TO-92 package, widely available)
- MMBT3906 (SOT-23 equivalent of 2N3906)
- BC807-25 (PNP, SOT-23, comparable gain)
- KSA992FBU (higher voltage rating)
Check datasheets for exact parameter matching.
- BC856BMTF (similar specs, lower current)
- 2N3906 (TO-92 package, widely available)
- MMBT3906 (SOT-23 equivalent of 2N3906)
- BC807-25 (PNP, SOT-23, comparable gain)
- KSA992FBU (higher voltage rating)
Check datasheets for exact parameter matching.
Pinout
The BC857BMTF is a PNP general-purpose transistor in a SOT-23 package with 3 pins:
1. Emitter (E) – Connected to the ground or lower voltage.
2. Base (B) – Controls the transistor’s switching/amplification.
3. Collector (C) – Connects to the load or higher voltage.
Key Features:
- Low power (max 250mA collector current, 300mW power dissipation).
- High current gain (hFE) – Typically 200-450.
- Used in switching, amplification, and signal processing circuits.
Compact and widely used in SMD applications.
1. Emitter (E) – Connected to the ground or lower voltage.
2. Base (B) – Controls the transistor’s switching/amplification.
3. Collector (C) – Connects to the load or higher voltage.
Key Features:
- Low power (max 250mA collector current, 300mW power dissipation).
- High current gain (hFE) – Typically 200-450.
- Used in switching, amplification, and signal processing circuits.
Compact and widely used in SMD applications.
Manufacturer
The BC857BMTF is manufactured by ON Semiconductor (now known as onsemi after rebranding in 2021).
onsemi is a global semiconductor company specializing in power management, analog, and sensor technologies. It serves industries like automotive, industrial, and consumer electronics, focusing on energy-efficient solutions.
The BC857BMTF is a general-purpose PNP transistor in a small SOT-23 package, commonly used in amplification and switching applications.
onsemi is a global semiconductor company specializing in power management, analog, and sensor technologies. It serves industries like automotive, industrial, and consumer electronics, focusing on energy-efficient solutions.
The BC857BMTF is a general-purpose PNP transistor in a small SOT-23 package, commonly used in amplification and switching applications.
Application
The BC857BMTF is a general-purpose PNP transistor commonly used in:
- Amplification circuits (audio, RF, and small-signal)
- Switching applications (relays, LEDs, and digital logic)
- Signal processing (oscillators, modulators, and filters)
- Consumer electronics (TVs, radios, and mobile devices)
- Industrial control systems (sensors and automation)
Its low noise, high current gain (hFE), and compact SOT-23 package make it suitable for space-constrained designs.
- Amplification circuits (audio, RF, and small-signal)
- Switching applications (relays, LEDs, and digital logic)
- Signal processing (oscillators, modulators, and filters)
- Consumer electronics (TVs, radios, and mobile devices)
- Industrial control systems (sensors and automation)
Its low noise, high current gain (hFE), and compact SOT-23 package make it suitable for space-constrained designs.
Package
The BC857BMTF is a PNP transistor packaged in SOT-23, a small surface-mount type (SMT) package with 3 pins. It's compact, suitable for high-density PCB designs, and commonly used in amplification and switching applications. The "MTF" suffix typically denotes tape-and-reel packaging for automated assembly.
