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INSEL Rectifiers India Thyristors may also be necessary to act in the opening switch mode as well. Such applications may contain those where voltage is reapplied to the pulse power switch shortly after closing and the switch needs to have improved blocking capability or the transfer energy needs to be controlled. In these applications, the switch needs to have turn-off capability to decrease the natural turn-off time (tq) of the device. The device is operated in GTO mode with the suitable commutating gate drive.

Thyristors may be used to bond a source of stored energy, such as a capacitor to a load, or to bypass and protect the load in the case of a crowbar circuit. In these pulsed power applications where the rate of rise of current is very fast, the pulse power switch is acting as a closing switch and ordinary phase control thyristors (SCRS) are probable to fail due to the high di/dt experienced?

Thyristors or SCRs (silicon controlled rectifiers). The Phase Control SCR provides phase-control of ac signals with a line frequency of 50-60 Hz. The Inverter SCR is used in pulsed power applications connecting higher frequencies. The main difference between the two families is the turn-off time (tq). Inverter SCRs typically have a tq of less than 30 microseconds (µs). Similar phase control SCRs has tq ratings of several hundred µs.

Thyristors or SCRs (silicon controlled rectifiers).

Applications:
  • UPS
  • Welding
  • Power Supplies
  • VAR Generators
  • Transportation
  • Traction Inverter
  • Medium Voltage Inverter
  • Flexible AC Transmission
  • Medical
  • Motor control
  • Battery Chargers
  • UPS Systems
  • Induction Heating
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(A) Thyristors
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(B) Thyristors
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(C) Thyristors
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(D) Thyristors
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(E) Thyristors
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(F) Thyristors
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(U) Thyristors
Introduction

We have combined the thermal, Electrical & Mechanical data of IRI range of medium and high power Silicon being manufactured by us…

Thyristor (SCR) Coding

T 10 A 80
T Average rating Housing VRRM / 10

1st letter indicates the product i.e. thyristor

2nd number indicates the current rating of thyristor.

3rd letter indicates the size of diode as A, B, C, D, E, F (refer figures)

4th number indicates the voltage group

Power Diodes (Stud / Flat Type)
Device Type VRRM IF(AV) TC VF
@
I Peak
IFSM I2t IRRM Rth(j-c) Mounting
Torque
Heat
Sink
Rec
Thread Package Out-line
(V) (A) (°C) (V) (A) A2Sx103 (mA) (°C/W) (Nm)
6NNRA 400-1600 6 160 1.10 159 0.127 2 2.5 2 61 M-6 DO-4 A
12NNRA 400-1600 12 160 1.30 265 0.351 2 2.0 2 K1 M-6 DO-4 A
16NA/RA 400-1600 16 160 1.20 350 0.612 4 1.6 2 K1 M-6 DO-4 A
25NA/RA/NB/RB 400-1600 25 140 1.35 400 0.80 4 1.5 2 Kl, K2 M-6,10/32″ DO-4, DO-5 A,B
40NB/RB 400-1600 40 140 1.35 500 1.25 10 1.0 4 K2, K3 M-6,M-8, 1/4″ DO-5 B
PA040A/PA040C 800-1000 40 140 1.35 500 1.25 10 1.0 4 RRA M-8 DO-5 B
7ONC/RC 400-1600 70 140 1.35 1200 7.1 10 0.45 4 K3, K4 M-6.M-8.1/4″ DO-5 C
100NE/RE/ND/RD 400-1600 100 130 1.50 2200 24.0 15 0.40 10 K4, K5 M-16, Flat DO-8 E.D
150NE/RE/ND/RD 400-1600 150 130 1.40 3570 64.0 22 0.25 10 K4, K5 M-16, Flat DO-8 E.D
200NE/RE/ND/RD 400-1600 200 130 1.35 3650 66.0 22 0.25 10 K4, K5 M-16, Flat DO-8 E,D
250NF/RF/NG/RG 400-1600 250 130 1.35 4500 92.5 40 0.18 30 K5 M-20, Flat DO-9 F,G
300NF/RF/NG/RG 400-1600 300 130 1.40 5000 125.0 50 0.12 30 K5 M-20, Flat DO-9 F,G
320NF/RF/NG/RG 400-1600 320 130 1.65 5500 151.0 50 0.12 30 K5 M-20, Flat DO-9 F,G
350NF/RF/NG/RG 400-1600 350 125 1.20 6000 180.0 50 0.12 30 K5 M-20, Flat DO-9 F,G
400NJ/RJ/NF/RF 400-1600 400 120 1.62 8250 340.0 50 0.12 50 K5 M-24, Flat DO-9 J,F
410NU/RU 1200-3600 410 120 1.15 7000 245.0 50 0.15 15 /Bolt ED, K5 Flat U U
570NU/RU 1200-4300 570 80 1.65 12000 725.0 50 0.065 15 /Bolt ED Flat U U
860NU/RU 1200-1800 860 80 1.65 16000 725.0 50 0.065 15 /Bolt ED Flat U U