UJT Characteristics Apparatus
Product Code : SCL-PLE-11842
The StemAids UJT Characteristics Apparatus is a precision electronic workstation designed for the empirical study of the Uni-Junction Transistor (UJT). This apparatus allows students to explore the unique "Negative Resistance" region of the UJT, which makes it ideal for relaxation oscillators and timing circuits. Manufactured to ISO 9001:2015 standards, it provides a stable environment to quantify the relationship between Emitter current (IE) and Emitter voltage (VE), as well as determining the Intrinsic Standoff Ratio (η).
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Active Device |
High-reliability UJT (e.g., 2N2646 or equivalent) |
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Regulated Power Supplies |
Dual independent DC sources: VBB (0–15V) and VEE (0–10V) |
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Monitoring |
3 Integrated High-Precision Meters (Emitter Voltmeter, Emitter Ammeter, Base-to-Base Voltmeter) |
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Ammeter Range |
0–50mA (for Emitter current measurement) |
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Voltmeter Ranges |
0–10V (Emitter Voltage) and 0–15V (Inter-base Voltage) |
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Control Interface |
Variable potentiometers for adjusting Emitter bias and Inter-base voltage |
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Interface |
4mm safety-shrouded sockets with high-contrast mimic diagram |
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ISO Compliance Code |
Manufactured under ISO 9001:2015 Quality Management Systems |
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HS Code |
9023.00.00 (Demonstrational scientific apparatus) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Thyristor-Family Interface: Facilitates student understanding of the double-base diode structure, supporting the curriculum for Power Electronics and Pulse Waveform Generation.
- Characteristic Quantification: Enables the physical plotting of the VEIE curve; learners apply varying voltages to identify the "Peak Point" (VP,IP) and "Valley Point" (VV,IV).
- Negative Resistance Analysis: Supports the analysis of the region where voltage decreases as current increases; students evaluate this phenomenon to understand how UJTs trigger SCRs.
- Parameter Calculation: Allows students to calculate the Intrinsic Standoff Ratio (η) and evaluate the inter-base resistance (RBB) of the device.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant). The unit is protected by anti-static (ESD) shielding and shock-absorbent foam to ensure the safety of the analog/digital meters during transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a technical manual with standardized experimental procedures.
- Durability: Tropicalized design featuring moisture-proof PCB lacquer and UV-resistant panel labeling for long-term clarity in varying laboratory climates.
Direct OEM Sourcing Advantages
Procuring the StemAids UJT Characteristics Apparatus directly ensures vertical manufacturing control:
- Stable Inter-base Biasing: We utilize high-regulation internal supplies to ensure VBB remains constant while plotting emitter characteristics, ensuring accurate determination of η.
- Component Precision: Direct oversight ensures that the UJTs used are factory-screened for standard parameters, making it easier for students to correlate laboratory results with textbook theory.
- Direct Factory Spares Availability: Guaranteed availability of replacement UJTs, precision potentiometers, and display meters to maximize the long-term ROI.
- Manufacturing Control: Direct oversight of the internal safety limits prevents students from exceeding the maximum power dissipation of the UJT during high-current "Valley Point" measurements.
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