Pc doesn't function at my home, it operates elsewhere, and then it works briefly at mine
Pc doesn't function at my home, it operates elsewhere, and then it works briefly at mine
If you review the charts on page 2 of this document, you'll notice the initial surge of the 550W power supply is 78.580A on 115V connections and rises to 93.990A on 230V ones.
This report was selected because the inrush currents for this 550W PSU are notably high. Premium power supplies generally exhibit lower inrush currents, particularly when connected to a 115V AC source.
The 850W model shows significantly reduced inrush current at 24.440A on 115V, while maintaining a normal 86.390A at 230V AC. This design makes it less likely to trigger a circuit breaker in the United States compared to the 550W unit.
The 850W power supply also features a Negative Temperature Coefficient thermistor that restricts input current, along with a bypass relay that cuts off the thermistor after a brief pause, enhancing efficiency.
Protection against surges comes from an MOV, and inrush protection is managed by an NTC thermistor combined with a bypass relay system.
Following the EMI/Transient filter, an NTC thermistor typically safeguards other components from intense inrush currents. A thermistor functions as a resistor whose value changes with temperature; at startup, it heats up and reduces resistance to about 0.5 to 1 Ohm.
Modern high-efficiency power supplies employ a relay that temporarily bypasses the thermistor after startup, allowing it to cool and operate normally during a PSU restart cycle (on/off). This also boosts efficiency by preventing unnecessary heating of the resistor.
As mentioned in all Tom's PSU evaluations, excessive inrush currents can lead to circuit breaker activation.
In summary, lower inrush current is key to preventing breaker trips with ATX power supplies.
Check reviews for models that include a thermistor and a bypass relay to ensure better protection and performance. Opting for higher-end units usually provides these features, while cheaper ones often skip them.
Thank you for your feedback! I understand you've explored various sources and am still uncertain about the situation. The new PSU you mentioned is a Gigabyte GP-P450B, 450W, 80 Plus Bronze, model number 28200-P450B-1BRR.