Within a silicon-controlled rectifier (SCR), which occurrence triggers a latch-up condition?

💡 Explanation

Excessive forward current activates parasitic bipolar transistors inherent in the SCR structure through a positive feedback loop via regenerative switching, leading to latch-up because the gate loses control; therefore current cannot be interrupted, rather than simply limiting current.

• Which mechanism degrades signal integrity in multimode fiber?
• Which risk increases when gain approaches maximum for a parabolic dish antenna?
• Which outcome occurs when a hydraulic directional control valve rapidly switches under high flow?
• Which risk increases when crankshaft torsional dampers degrade in a high-performance engine?
• Which consequence results when differential current within a load circuit protected by GFCI breaker abnormally increases?
• Which outcome occurs when an engine's Lambda sensor fails, misreporting lean condition during high RPM operation?