Thyristors, SCRs and Triacs

General Electric - 2N4988 - Silicon Unilateral Switch, SUS, Use as a SCR Trigger.

The General Electric SUS is a silicon, planar monolithic integrated circuit having thyristor electrical characteristics closely approximating those of an "ideal" four-layer diode. The device is designed to switch at 8 volts with a typical temperature coefficient of 0.02%/°C. A gate lead is provided to eliminate rate effect, obtain triggering at lower voltages, and to obtain transient-free waveforms. The SBS is a bilateral version of the forward characteristics of the SUS. It provides excellently matched characteristics in both direc tions with the same low temperature coefficient.

Status: Discontinued

200mA 30V.

Dissipation: 350mW.

Package: TO-98 plastic.

Note: Silicon Unilateral Switch.

Operating temperature: 150 Deg C.

Genuine Vintage GE SUS - New Old Stock - Difficult to Find Unilateral Switch 

NSN: 5961-01-114-3389

Applications: Dual Usage Commercial and Military.  

General Electric - C106A4 SCR, Silicon Controlled Rectifier.

 4Amp 100V (DRM)

Package: TO-220 Flat Design - Axial -F. (TO-202)

Suggested Alternate: Teccor T106B4

New Old Stock

General Electric - C141MR96

Military SCR NAVAL SURFACE WARFARE CENTER Aerospace No 2500730

SILICON SCR

Current: 35A

Voltage: 400V

STUD 2 TAB

SOLDER LUG AND 1 THREADED STUD

Genuine General Electric 

NSN 5961-01-155-5605

General Electric - C126D5X - SCR, Silicon Controlled Rectifier.

Voltage: 400V.

Current: 12Amp.

Package: TO-220 (230.2).

Genuine General Electric - New Old Stock

Alternates: ECG5554, SK6654

Eaton Powerware / Powerex TRX /Mitubishi - 143-330-012 Phase Control Thyrister - SCR

TO200 Package T72 Case

Approx. 2.3” Diameter by 1.05” Thick (Details in Attached Diagram)

58.05mm  diameter 26.64mm thickness

Powerex Silicon Controlled Rectifiers (SCR) are designed for phase control applications. These are all-diffused. Press-Pak (Pow-R-Disc) devices employing the field proven amplifying (di/namic) gate.

Storage Temperature -40 to 150C

Operating Temperature -40 to 125C

Mounting force 2000-2500 lbs

Mounting Force 8.9 to 11.1 kN

Applications are Power supplies, Battery chargers, & Motor Control.

NSN 5961-01-329-5002 

Alternates/Substitutes/Replacement/Similar P/Ns NTE5596, C390PA, 143-300-12, C390PAX85, 5961-01-329-5002, 01-329-5002, 5961013295002, 143330012, 013295002

A bistable semiconductor device comprising three or more junctions which is normally a nonconductor until the application of a signal to a gate terminal, at which time the device switches to the conductive state. Includes devices capable of being switched back to the nonconductive state upon application of a different signal to the same or another gate terminal.