Transistors - Programmable Unijunction
Transistors - Programmable Unijunction: Classification Introduction
1. Definition of Programmable Unijunction Transistors (PUTs)
Programmable Unijunction Transistors (PUTs) are specialized discrete semiconductor devices that function as voltage-controlled switches or oscillators. Unlike conventional unijunction transistors (UJTs), PUTs offer adjustable parameters such as the intrinsic standoff ratio, enabling precise control over triggering thresholds. These components are widely used in timing circuits, pulse generation, and thyristor triggering applications due to their reliability and programmability.
2. Types of Programmable Unijunction Transistors
This category encompasses several variants of PUTs, including:
- Standard PUTs: Basic models with adjustable trigger voltages for general-purpose applications.
- High-Speed PUTs: Optimized for rapid switching in frequency-sensitive circuits.
- Low-Power PUTs: Designed for energy-efficient applications where minimal current consumption is critical.
- Surface-Mount (SMD) PUTs: Compact form factors for modern PCB designs.
3. Purchasing Recommendations
When selecting a Programmable Unijunction Transistor, consider the following factors:
- Voltage & Current Ratings: Ensure compatibility with your circuit s operational requirements.
- Trigger Adjustment Range: Choose a PUT with a suitable intrinsic standoff ratio for precise control.
- Package Type: Select through-hole or SMD based on assembly constraints.
- Reliability & Brand Reputation: Opt for trusted manufacturers to guarantee performance and longevity.
PUTs are essential for designers seeking flexible, high-performance switching solutions. Evaluate datasheets and application notes to match the right component to your project needs.
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2N6027G
TRANS PROG UNIJUNCT 40V TO92
2N6028RLRP
THYRISTOR PROG UNIJUNCT 40V TO92
2N6028RLRAG
THYRISTOR PROG UNIJUNCT 40V TO92
2N6027RL1
THYRISTOR PROG UNIJUNCT 40V TO92
2N4949
THROUGH-HOLE UJT
2N6028RLRPG
THYRISTOR PROG UNIJUNCT 40V TO92
2N6027RLRA
THYRISTOR PROG UNIJUNCT 40V TO92
2N6027RL1G
THYRISTOR PROG UNIJUNCT 40V TO92
2N4948
THROUGH-HOLE UJT
2N6027RLRAG
THYRISTOR PROG UNIJUNCT 40V TO92
CMPP6027R TR
PROGRAMMABLE UJT SOT-23
2N5431
THROUGH-HOLE UJT
2N4851
THROUGH-HOLE UJT
GES6028
PNP PROGRAMMABLE UNIJUNCTION TRA
CMPP6028R TR
PROGRAMMABLE UJT SOT-23
2N4852
THROUGH-HOLE UJT
CMPP6027R BK
PROGRAMMABLE UJT SOT-23
CMPP6028R BK
PROGRAMMABLE UJT SOT-23
2N4853
THROUGH-HOLE UJT