Triggering Circuits for SCR Manufacturer,Supplier and Exporter in India
Product Code : EL-PET-1430
Jlab Export is a leading Triggering Circuits for SCR Manufacturer,and suppliers in India
Triggering Circuits for SCR (code EL-PET-1430) is a power electronics training board for comparing three basic ways of firing an SCR and applying them in half-wave and full-wave controlled rectifiers. Separate potentiometers set the SCR firing angle and the UJT firing angle, and two more vary the load. Jain Laboratory Instruments Pvt Ltd (JLab) produces it in Ambala, India, as part of its power electronics range.
Specifications
| Parameter | Detail |
|---|---|
| Experiments | Resistor (R) triggering circuit; resistor–capacitor (R-C) triggering circuit; UJT triggering circuit (UJT relaxation oscillator); half-wave controlled rectifier; full-wave controlled rectifier |
| AC supply | 35 V AC at 100 mA |
| Rectifier | Bridge rectifier for making DC voltage |
| SCRs | Two silicon controlled rectifiers |
| UJT | Unijunction transistor |
| Pulse transformer | 1:1 |
| Load potentiometers | Two, for varying the load |
| Firing-angle potentiometers | Two: one for the SCR firing angle, one for the UJT firing angle |
| Other components | Adequate number of other electronic components |
| Mains controls | Mains ON/OFF switch, fuse and jewel light |
| Mains supply | 230 V ±10%, 50 Hz AC |
| Patch cords | Adequate number, stackable, 4 mm spring-loaded plugs, ½ metre long |
| Terminals | Terminals and sockets on the panel for connections and observation of waveforms |
| Operating instructions | Detailed: object, theory, design procedures, report suggestions and book references |
| Weight | 3 kg (approx.) |
| Dimensions | W 340 × H 110 × D 210 |
| Other apparatus required | Dual-trace cathode ray oscilloscope, 20 MHz (unearthed) |
| Quality check | Each board is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-PET-1430 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Triggering Circuits for SCR Board Used For?
An SCR on AC only conducts after its gate receives a signal, so the triggering circuit decides where in each half-cycle the power starts to flow. This board lets students build the classic triggering circuits on one panel, watch the gate and load waveforms on an oscilloscope, and then use the same circuits to control a half-wave and a full-wave rectifier. Triggering is usually taught early in power electronics courses for electrical and electronics engineering students, before phase control and converters.
What to Specify When Ordering
- The number of boards.
- Whether an oscilloscope should be quoted with them.
- Follow-on boards, for example SCR And AC Phase Control or the SCR Triggering Circuit, if your syllabus continues to phase control.
- The delivery destination, delivery terms and any tender reference.
Frequently Asked Questions
How do R, R-C and UJT triggering differ?
With simple resistor triggering the gate current follows the supply voltage, so firing can be delayed only up to the peak of the half-cycle. Adding a capacitor in R-C triggering shifts the gate voltage in phase, so firing can be delayed almost to the end of the half-cycle. A UJT relaxation oscillator delivers sharp, repeatable pulses, which give more consistent firing than a slowly rising gate voltage.
What is the pulse transformer for?
A pulse transformer passes a trigger pulse to an SCR gate while keeping the trigger circuit electrically isolated from the power circuit. The board has a 1:1 pulse transformer.
What supply does the board use?
It runs from 230 V ±10%, 50 Hz AC mains. A 35 V AC, 100 mA supply and a bridge rectifier for making DC voltage are built in.
What other apparatus is required?
A 20 MHz dual-trace cathode ray oscilloscope of the unearthed type. JLab’s own 20 MHz dual-trace oscilloscope is linked below as a separate item.
How does it differ from the SCR Triggering Circuit board?
The SCR Triggering Circuit board fires an SCR with controlled gate pulses from a signal conditioner and pulse generator IC and shows the firing angle moving with a reference voltage. This board covers the basic triggering circuits and their use in half-wave and full-wave controlled rectifiers.
What information is needed for an export quotation?
The quantity, the destination country and port or city, the delivery terms you want (for example FOB or CIF), packing or labelling requirements, and the tender reference if there is one.
Who manufactures Triggering Circuits for SCR?
Jain Laboratory Instruments Pvt Ltd, which trades as JLab, manufactures it at its works in Ambala, Haryana, India.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, an electronics and power electronics trainer manufacturer in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The triggering board is made at JLab’s own works instead of being bought from a trader, so engineering colleges, polytechnics, dealers and importers order it directly from the maker; boards are visually inspected before dispatch, and repeat orders are supplied by the manufacturer itself. JLab exports worldwide and ships to buyers in every region — for example Estonia in Northern Europe, Honduras in Central America and the Caribbean, Austria in Western Europe, Botswana in Southern Africa and Colombia in South America. For tender enquiries, see the JLab lab tenders page.
Related Triggering and Thyristor Boards
- SCR Triggering Circuit — controlled gate pulses from a signal conditioner and pulse generator IC.
- SCR And AC Phase Control — resistance, R-C and UJT trigger circuits used for half-wave and full-wave phase control.
- UJT Relaxation Oscillator — a board on the UJT relaxation oscillator and its use as an SCR trigger circuit.
- UJT Characteristics Apparatus — for plotting the V-I characteristics of a UJT and measuring its interbase resistance.
- SCR Characteristics Apparatus — for plotting the anode current against anode–cathode voltage of an SCR.
- Dual Trace Oscilloscope — a 20 MHz dual-channel oscilloscope.
See all Power Electronics Trainers or the full Electronics Lab Equipments range.
Request a Quote
Send an enquiry with the Add To Cart button on this page, or contact JLab through the contact page, with the number of boards, the delivery location and whether an oscilloscope should be added.
Last updated: 22 October 2026
