Thyristor Time Delay Relay Manufacturer,Supplier and Exporter in India
Product Code : EL-PET-1421
Jlab Export is a leading Thyristor Time Delay Relay Manufacturer,and suppliers in India
Thyristor Time Delay Relay (code EL-PET-1421) is a power electronics training board for four timer experiments: delayed turn-on and automatic turn-off of a DC load, and the same two actions with a TRIAC working as an AC line switch. A 2N2646 UJT acts as the timer that fires the thyristors. JLab — Jain Laboratory Instruments Pvt Ltd — makes the board in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Experiments | Delayed turn-on of a DC load; auto turn-off of a DC load; delayed turn-on of a TRIAC as line switch; auto turn-off of a TRIAC as line switch |
| DC power supply | 12 V DC at 2 A, internally connected |
| Timer | UJT 2N2646 |
| Delay adjustment | Potentiometer for ramp control; set of 3 capacitors for time delay control |
| Thyristors | Two SCRs connected in parallel-coupled mode, with a commutation capacitor |
| Start control | Push-button switch for starting |
| AC line switch | TRIAC |
| AC load | Lamp holder with a 15 W, 230 V lamp |
| Other components | Adequate number of other electronic components |
| 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 | Digital multimeter, 3¾ digit; digital stop clock |
| 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-1421 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Thyristor Time Delay Relay Board Used For?
A time delay relay switches a load on, or off, a set time after it is started. In a UJT timer a capacitor charges through a resistance until its voltage reaches the UJT’s peak-point voltage; the UJT then fires and its pulse triggers the thyristor. On this board the ramp-control potentiometer and the choice of timing capacitor change that charging time, so students can relate the delay they measure to the resistance and capacitance in the circuit. Electronic delay timers of this kind are a common experiment in industrial and power electronics courses.
What to Specify When Ordering
- How many boards you need.
- Any measuring instruments to be quoted on the same enquiry.
- Companion boards, such as the Triac AC Line Switching or Forced Commutated Circuits trainers, if you are building a set of thyristor experiments.
- Destination, delivery terms and, where it applies, the tender reference.
Frequently Asked Questions
How is the DC load turned off automatically?
On DC an SCR stays on once it has been triggered, because its current does not fall to zero by itself, so switching it off needs forced commutation. For this the board has two SCRs connected in parallel-coupled mode and a commutation capacitor.
What load does the AC part of the board switch?
A 15 W, 230 V lamp in a lamp holder, switched by a TRIAC working as the line switch.
What power supply does the board use?
It connects to 230 V ±10%, 50 Hz AC mains, and its 12 V DC, 2 A supply is built in and internally connected.
Which other apparatus is required?
A 3¾-digit digital multimeter and a digital stop clock to time the delay. JLab lists both as separate items; they are linked below and can be added to the same enquiry.
How does it differ from the Triac AC Line Switching board?
This board’s experiments are about timing: delayed turn-on and automatic turn-off of a DC load and of a TRIAC line switch. The Triac AC Line Switching board’s five experiments compare ways of triggering a triac as an AC power switch — from the line, from DC, by self-latching and by a UJT.
What details help JLab prepare an export quotation?
The quantity, the destination country and port or city, your delivery terms (for example FOB or CIF), any packing or labelling requirements, and the tender reference if one applies.
Who manufactures this time delay relay board?
Jain Laboratory Instruments Pvt Ltd, known as JLab, manufactures it at its Ambala works in Haryana, India.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a manufacturer of electronics trainers and laboratory equipment in India, incorporated in 2017 and located on Hargolal Road, Ambala, Haryana. The time delay relay board is assembled at JLab’s own works instead of being sourced from a trader, which lets engineering colleges, training institutes, dealers and importers buy it direct; each board is checked by eye before it leaves, and repeat orders and replacement parts go through the maker. JLab exports worldwide and ships to buyers in every region — for example Taiwan in East Asia, Papua New Guinea in Oceania, Ivory Coast in West Africa, Nepal in South Asia and the Netherlands in Western Europe. Tender details are on the JLab lab tenders page.
Related Thyristor Boards and Instruments
- Triac AC Line Switching — a board for five experiments on the triac as an AC mains power switch.
- Forced Commutated Circuits — a training board for studying Class A to Class E commutation of SCRs.
- SCR DC Circuit Breaker — a board for SCR turn-off action and DC over-voltage and over-current trips.
- UJT Relaxation Oscillator — a board for the UJT relaxation oscillator and its use as an SCR trigger circuit.
- Digital Stop Clock — a quartz-controlled bench stop clock with a seven-segment display.
- Digital Multimeter — a hand-held meter for AC and DC voltage, DC current and resistance.
See the full Power Electronics Trainers range or all Electronics Lab Equipments.
Request a Quote
Press the Add To Cart enquiry button on this page, or contact JLab through the contact page, and give the number of boards, where they are to be delivered and whether the stop clock and multimeter should be included in the quote.
Last updated: 22 October 2026
