SCR Characteristics Apparatus
Product Code : SCL-EAE-11323
Quick answer: The SCR Characteristics Apparatus is a power-electronics practical set for studying a silicon controlled rectifier: its forward-blocking, gate-triggered conduction and reverse-blocking regions, plus latching and holding current. Students record anode voltage, anode current and gate observations to plot V-I curves. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Device studied | Silicon controlled rectifier (SCR) |
| Device terminals | Anode, cathode and gate |
| Apparatus type | Semiconductor and power-electronics laboratory apparatus |
| Primary experiments | V-I characteristics, gate triggering, latching current and holding current |
| Readings taken | Anode voltage, anode current and gate-control observations |
| Brand | Lab Exports |
How the SCR characteristics experiment is done
A silicon controlled rectifier is a four-layer PNPN device with three terminals: anode, cathode and gate. With the anode positive, the SCR blocks current until the forward voltage reaches its breakover value or a suitable gate current is applied. Once it switches on, it stays on without gate drive as long as the anode current remains above the holding current, which is why it is used as a controlled rectifier and electronic switch.
The apparatus gives students a fixed circuit in which the anode supply and the gate signal are varied separately, so the effect of gate current on the switching point is seen directly.
- Identify the anode, cathode and gate connections and set all supplies to zero.
- Apply a fixed gate current, raise the anode voltage in steps and record anode voltage and current until the SCR switches on.
- Repeat for other gate current values to see the switching point move.
- After conduction starts, remove the gate signal and note that the SCR stays on (latching).
- Reduce the anode supply slowly and record the current at which the SCR turns off (holding current).
Plotting anode current against anode voltage shows the forward-blocking region, the sudden fall in voltage at turn-on and the low-voltage conducting region, while reverse-bias readings show blocking in the opposite direction.
Key features
- Shows the blocking and conducting regions of the SCR on one V-I characteristic
- Gate-triggering study: a gate signal switches a forward-biased SCR into conduction
- Latching-current investigation: the minimum anode current needed to stay on after triggering
- Holding-current study: turn-off as the anode current falls below the holding level
- Readings tabulate and graph easily; suited to instructor demonstrations and repeated student practicals
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the SCR Characteristics Apparatus at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
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The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What experiments can be done with the SCR characteristics apparatus?
Forward V-I characteristics, gate-triggered switching, and determination of the approximate latching and holding current of a silicon controlled rectifier.
What is the difference between latching current and holding current?
Latching current is the minimum anode current needed to keep the SCR on just after the gate signal is removed; holding current is the lower current below which a conducting SCR turns off. Latching current is normally higher than holding current.
What is the price of the SCR Characteristics Apparatus?
Prices are not published on the website. Add the SCR Characteristics Apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11323 and the quantity, to receive a quotation.
Does Lab Exports manufacture the SCR Characteristics Apparatus?
Yes. Lab Exports manufactures the SCR Characteristics Apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11323.
Request a quote
Email [email protected] with the house code SCL-EAE-11323 and the quantity, or add the SCR Characteristics Apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
