BIS QCO 2025: Low-Voltage Switchgear & Controlgear (IS/IEC 60947-4-3)
The​​‌​‌​​‌​‌ Low-Voltage Switchgear and Controlgear – Part 4: Contactors and Motor-Starters – Section 3: Semiconductor Controllers and Semiconductor Contactors for Non-Motor Loads (3rd Revision) is a landmark in terms of

