NPS-250KBB Specifications
Dell 250W Internal Power Supply Unit
Manufacturer: Dell
Manufacturer Model: NPS-250KBB
Product Line: Dell Desktop Replacement Parts
Product Series: Compatible with Dell Dimension / OptiPlex / PowerEdge and Precision legacy desktops
Product Type: Internal Power Supply Unit (PSU)
Product Name: Dell 250W Internal Power Supply Unit
KEY FEATURES:
Power Output: 250 Watts
Input Voltage: 100‑120 V AC @ ~9A / 200‑240 V AC @ ~4.5A, 50/60 Hz
Form Factor: Internal desktop PSU designed for legacy Dell systems
Connector Type: 20‑pin ATX main connector; 4‑pin +12 V power connector; multiple Molex/IDE/SATA/floppy power connectors
Features Supported: OEM Dell replacement unit for maintaining legacy systems
PERFORMANCE:
Maximum Power Output: 250 W
+5 V Rail: approx. 22 A
+3.3 V Rail: approx. 18 A
+12 V Rail: approx. 14 A
‑12 V Rail: approx. 1 A
+5 V Standby Rail (5VSB): approx. 2 A
Compatibility: Designed for Dell Dimension, OptiPlex, PowerEdge and Precision legacy desktop models
ENVIRONMENTAL & RELIABILITY:
Operating Temperature Range: Not explicitly specified
Storage Temperature Range: Not explicitly specified
Operating Humidity: Not explicitly specified
Shock Resistance: Not explicitly specified
Vibration Resistance: Not explicitly specified
PHYSICAL:
Dimensions (W × D × H): 150 mm × 85 mm × 140 mm
Weight: Not explicitly specified
Color: Black / OEM Dell standard

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