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BC857ALT1G
+NomenclatureTRANS PNP 45V 0.1A SOT23-3
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FabricantSemi - conducteurs
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Pièce fabricant #BC857ALT1G
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En stock2774
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Spécifications
| Attribut | Valeur |
| Part Status | Active |
| Base Product Number | BC857 |
| 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 | 125 @ 2mA, 5V |
| Power - Max | 300 mW |
| Frequency - Transition | 100MHz |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Supplier Device Package | SOT-23-3 (TO-236) |
| Packaging | Cut Tape (CT), Tape & Reel (TR) |
Présentation
Description
BC857ALT1G is a PNP general-purpose transistor in the BC857 family, used for small-signal amplification and low-power switching. The ALT1G suffix denotes a specific RoHS-compliant variant from the vendor (lead-free, packaging option). It is the complementary device to BC847 (NPN). Typical specs (variant dependent): Vceo ≈ 45 V, Ic up to about 100 mA, with a wide current gain (hFE) range that varies with Ic and temperature. It’s valued for low noise and reasonable gain in signal paths, sensors, and drive stages. Pinout and exact ratings depend on the package (e.g., SOT-23 vs. TO-92); consult the datasheet for correct pin configuration, biasing, and maximum ratings.
Equivalent
Equivalent products (PNP general-purpose, similar to BC857ALT1G):
- BC857A (same family, different package)
- BC857S (SOT-23)
- MMBT3906 / MMBT3906LT1G (lead-free SMD)
- PMBT3906 / PMBT3906LT1G (SMD)
- 2N3906 (through-hole)
- BC857A (same family, different package)
- BC857S (SOT-23)
- MMBT3906 / MMBT3906LT1G (lead-free SMD)
- PMBT3906 / PMBT3906LT1G (SMD)
- 2N3906 (through-hole)
Features
Key features of BC857ALT1G (PNP general-purpose transistor):
- PNP, general-purpose switching/ amplifier transistor
- Maximum collector current (Ic): 100 mA
- Maximum collector-emitter voltage (Vceo): -45 V
- Low-noise, good gain performance
- Gain grades: BC857A/B/C (typical hFE varies by grade, roughly 110–800 overall)
- Complement to BC847 (NPN)
- Temperature range: approx. -55°C to +150°C
- ALT1G suffix indicates RoHS-compliant, lead-free, and standard packaging (often tape-and-reel) suitable for automated assembly
Note: exact hFE and package options depend on the specific supplier and variant.
- PNP, general-purpose switching/ amplifier transistor
- Maximum collector current (Ic): 100 mA
- Maximum collector-emitter voltage (Vceo): -45 V
- Low-noise, good gain performance
- Gain grades: BC857A/B/C (typical hFE varies by grade, roughly 110–800 overall)
- Complement to BC847 (NPN)
- Temperature range: approx. -55°C to +150°C
- ALT1G suffix indicates RoHS-compliant, lead-free, and standard packaging (often tape-and-reel) suitable for automated assembly
Note: exact hFE and package options depend on the specific supplier and variant.
Pinout
- Pin count: 3 pins
- Function: General‑purpose PNP transistor (BC857 family) for switching and low‑power amplification (in SOT‑23 package; typical Vceo ~45 V, Ic ~100 mA, hFE varies by grade A/B/C).
- Function: General‑purpose PNP transistor (BC857 family) for switching and low‑power amplification (in SOT‑23 package; typical Vceo ~45 V, Ic ~100 mA, hFE varies by grade A/B/C).
Manufacturer
Manufacturer: Nexperia (a global semiconductor company, formerly Philips/NXP Semiconductors).
What kind of company: A Dutch-based multinational that designs and manufactures discrete semiconductors (transistors, diodes), MOSFETs, and related components for electronics.
What kind of company: A Dutch-based multinational that designs and manufactures discrete semiconductors (transistors, diodes), MOSFETs, and related components for electronics.
Application
BC857ALT1G is a general‑purpose PNP transistor (SOT‑23). Suitable for low‑to‑medium current signal amplification and switching. Common applications include:
- High‑side switches and level‑shifting in analog/digital circuits
- Buffering/inverting stages in small signal paths
- Audio preamplifier and other low‑noise preamp sections
- Sensor interfaces and instrumentation in portable/consumer electronics
- Simple driver/switch circuits in compact electronics
Concise and versatile for general small‑signal PNP needs.
- High‑side switches and level‑shifting in analog/digital circuits
- Buffering/inverting stages in small signal paths
- Audio preamplifier and other low‑noise preamp sections
- Sensor interfaces and instrumentation in portable/consumer electronics
- Simple driver/switch circuits in compact electronics
Concise and versatile for general small‑signal PNP needs.
Package
BC857ALT1G comes in a SOT-23, three-pin surface-mount package.
