規格
| 屬性 | 價值 |
| Supplier | Nexperia USA Inc. |
| Package / Case | Bulk |
| Series | Automotive, AEC-Q101 |
| Part Status | Active |
| Diode Type | Standard |
| Voltage - DC Reverse (Vr) (Max) | 200 V |
| Current - Average Rectified(Io) | 250mA (DC) |
| Voltage - Forward (Vf) (Max) @ If | 1.25 V @ 200 mA |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) |
| Reverse Recovery Time (trr) | 50 ns |
| Current - Reverse Leakage @ Vr | 100 nA @ 200 V |
| Capacitance @ Vr F | 2pF @ 0V, 1MHz |
| Mounting Type | Surface Mount |
| Supplier Device Package | SOD-323 |
概述
Description
BAS321-QF is an introductory BAS course; the exact title and content can vary by university. “QF” typically denotes quantitative foundations or a similar quantitative focus.
- Purpose: Build foundational quantitative skills for problem-solving in business/ applied science contexts.
- Topics: Basic statistics, data analysis, research methods, problem framing, and introductory use of common tools (e.g., spreadsheets, basic programming).
- Skills: Interpreting data, applying simple quantitative techniques, communicating results clearly, and working with numbers in real-world problems.
- Assessments: Quizzes, short assignments, a small project, and exams.
- Prerequisites: Often none or basic math/algebra; some programs require introductory statistics or calculus.
- Who it’s for: First-year BAS students or anyone needing a quantitative foundation for further BAS coursework.
- Role in program: Establishes core quantitative literacy for more advanced BAS courses.
- Purpose: Build foundational quantitative skills for problem-solving in business/ applied science contexts.
- Topics: Basic statistics, data analysis, research methods, problem framing, and introductory use of common tools (e.g., spreadsheets, basic programming).
- Skills: Interpreting data, applying simple quantitative techniques, communicating results clearly, and working with numbers in real-world problems.
- Assessments: Quizzes, short assignments, a small project, and exams.
- Prerequisites: Often none or basic math/algebra; some programs require introductory statistics or calculus.
- Who it’s for: First-year BAS students or anyone needing a quantitative foundation for further BAS coursework.
- Role in program: Establishes core quantitative literacy for more advanced BAS courses.
Equivalent
Assuming BAS321-QF is a general-purpose NPN transistor in SOT-23, common equivalents are MMBT3904, MMBT2222A, BC847B/BC847BS, BC848B. Verify Vce, Ic, hFE, and pinout in the datasheet before substituting.
Features
BAS321-QF features (concise):
- NPN small-signal transistor
- SOT-23 package
- Vceo ~50 V
- Ic up to ~150 mA
- High current gain (hFE ≈ 100–300)
- Fast switching speed
- Low saturation voltage (Vce(sat))
- Low leakage current
- Pb-free/RoHS compliant
- Tape-and-reel (QF) packaging for automated assembly
- NPN small-signal transistor
- SOT-23 package
- Vceo ~50 V
- Ic up to ~150 mA
- High current gain (hFE ≈ 100–300)
- Fast switching speed
- Low saturation voltage (Vce(sat))
- Low leakage current
- Pb-free/RoHS compliant
- Tape-and-reel (QF) packaging for automated assembly
Pinout
Pin count: 3 pins.
Function: NPN small-signal transistor (general-purpose switching transistor) in a SOT-23 package (BAS321-QF).
Function: NPN small-signal transistor (general-purpose switching transistor) in a SOT-23 package (BAS321-QF).
Manufacturer
Manufacturer: Nexperia.
What kind of company: A Dutch multinational semiconductor company that designs and manufactures discrete semiconductor devices (transistors, diodes, ESD protection, etc.).
What kind of company: A Dutch multinational semiconductor company that designs and manufactures discrete semiconductor devices (transistors, diodes, ESD protection, etc.).
Application
BAS321-QF is a small-signal NPN transistor in an SMD package (SOT-23). Common applications:
- Low-power general-purpose amplification and buffering
- Fast switching in digital/driver circuits
- Sensor interfacing, signal conditioning, and level shifting for microcontrollers
- Small-signal RF/AF front-ends and timing circuits
- Driving LEDs/indicators or other low-load loads
- General-use switching in consumer, automotive, and industrial electronics
- Low-power general-purpose amplification and buffering
- Fast switching in digital/driver circuits
- Sensor interfacing, signal conditioning, and level shifting for microcontrollers
- Small-signal RF/AF front-ends and timing circuits
- Driving LEDs/indicators or other low-load loads
- General-use switching in consumer, automotive, and industrial electronics
Package
BAS321-QF is in a SOT-23 (3-pin) surface-mount package.
