This heating element control with up to 3 kW was obtained from an old American documentation. SCRs must be load-compliant, and transistors can be current equivalents.
We found this circuit in a 1968 Electronics World. The transistors are from the era and...
In the figure we have the way to implement a monostable with an operational amplifier LM393. The...
Suggested by Motorola documentation from the 1980s, this circuit makes use of MOSFETs of the time....