United StatesPower Supplies Reliable Energy Solutions
Explore high-performance power supplies engineered for reliability, efficiency, and durability. Our cutting-edge solutions deliver optimal energy management for industrial, commercial, and residential applications while meeting stringent quality standards.
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Cisco Power Supplies (151)
Cisco power supplies serve campus access closets, WAN aggregation routers, and firewall edges using AC, DC, PoE, or redundant bays
Dell Power Supplies (17)
Dell power supplies fit rack servers, storage shelves, and campus compute rooms using hot-plug AC or Titanium-efficiency modules
Juniper Power Supplies (11)
Juniper power supplies serve branch SRX firewalls, EX access switches, and MX edge routers with AC or DC input options
D-Link Power Supplies (4)
D-Link power supplies support edge access switches, surveillance closets, and SMB wireless nodes using AC adapters or internal modules
Huawei Power Supplies (2)
Huawei power supplies serve campus access switches, routing shelves, and telecom rooms using AC, DC, or rectifier-backed feeds
Hpe Power Supplies (96)
HPE power supplies fit ProLiant server racks, Aruba access switches, and storage enclosures with hot-plug AC supply modules
Lenovo Power Supplies (4)
Lenovo power supplies support ThinkSystem servers, storage trays, and workstation racks using hot-swap AC modules or redundant bays
Intel Power Supplies (8)
Intel power supplies serve white-box server platforms and compute appliances using CRPS form factors, PMBus telemetry, and redundant inputs
Fujitsu Power Supplies (6)
Fujitsu power supplies fit PRIMERGY rack servers and storage shelves with hot-plug AC modules for data-center compute rows
299 Matching results
- BEST SELLING
865414-B21 (HPE 800W FS PLAT HT PLG LH PWR SPLY KIT PL-SI)
5 (5)- Power Supply
- 750W
- Gaming
- ATX
- Modular
- Gold
- Single Rail
Est Value
$480.54$110.53
77% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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C3KX-PWR-350WAC= (Catalyst 3K-X 350W AC Power Supply )
4.8 (5)- Power Supply
- 350W
- Gaming / Workstation / General Use
- ATX
- Non-Modular
- 80 PLUS
- Single Rail
Est Value $581.70$215.23
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C3KX-PWR-715WAC= (Catalyst 3K-X 715W AC Power Supply )
4.8 (5)- Power Supply
- 715W
- Enterprise Server / Workstation / Gaming
- ATX
- Semi-Modular
- Bronze
- Single Rail
Est Value $1,163.39$221.04
81% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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865438-B21 (800W FS TI HT PLG LH PWR SPLY KIT PL SI)
5 (5)- Power Supply
- 750W
- Enterprise Server / Workstation / Gaming
- ATX
- Modular
- Gold
- Single Rail
Est Value $625.00$240.00
61.6% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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PWR-C2-250WAC= (250W AC Config 2 Power Supply Spare)
4.6 (5)- Power Supply
- 250W
- Gaming / Workstation / Server
- ATX
- Non-Modular
- 80 PLUS
- Single Rail
Est Value $724.00$257.00
64.5% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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PWR-C2-640WAC= (640W AC Config 2 Power Supply Spare )
4.6 (5)- Power Supply
- 640W
- Gaming / Workstation / General Use
- ATX
- Non-Modular
- Bronze
- Single Rail
Est Value $1,551.00$406.00
73.8% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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C3KX-PWR-1100WAC= (Catalyst 3K-X 1100W AC Power Supply)
4.4 (5)- Power Supply
- 1100W
- Gaming / Workstation / Server
- ATX
- Modular
- Platinum
- Multi Rail
Est Value $1,745.10$418.83
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PWR-C49M-1000AC/2 (Cisco 4900M Switch PWR-C49M-1000AC/2)
4.4 (5)- Power Supply
- 1000W
- Gaming
- ATX
- Modular
- Platinum
- Single Rail
Est Value $1,000.00$440.00
56% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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PWR-C1-1100WAC (1100W AC Config 1 Power Supply)
4.6 (5)- Power Supply
- 1100W
- Workstation / Gaming
- ATX
- Modular
- Gold
- Single Rail
Est Value $2,330.00$457.00
80.4% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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PWR-C49M-1000AC (4900M AC POWER SUPPLY 1000WATTS)
4.8 (5)- Power Supply
- 1000W
- Gaming / Workstation
- ATX
- Modular
- Gold
- Multi Rail
Est Value $1,150.00$500.00
56.5% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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PWR-C2-1025WAC= (1025W AC Config 2 Power Supply Spare)
4.6 (5)- Power Supply
- 1000W
- Gaming / Workstation / Enterprise Server
- ATX
- Modular
- Gold
- Multi Rail
Est Value $2,335.00$531.00
77.3% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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PWR-C45-1400AC (CATALYST 4500 1400W AC POWER SUPPLY DATA ONLY)
4.4 (5)- Power Supply
- 1400W
- Gaming / Workstation / Server
- ATX
- Modular
- Platinum
- Single Rail
Est Value $1,495.00$656.00
56.1% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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PWR-C49M-1000DC/2 (Cisco 4900M Switch PWR-C49M-1000DC/2)
4.6 (5)- Power Supply
- 1000W
- Gaming / Workstation / Server
- ATX
- Modular
- Gold
- Single Rail
Est Value $1,500.00$661.00
55.9% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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PWR-C49M-1000DC (Cisco 4900M Switch PWR-C49M-1000DC)
4.6 (5)- Power Supply
- 1000W
- Gaming / Workstation / Server / Enterprise Server / Data Center
- ATX
- Modular
- Gold
- Single Rail
Est Value $1,700.00$752.00
55.8% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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WS-CAC-3000W (CATALYST 6500 3000W AC PWR SUPP)
4.8 (5)- Power Supply
- 1600W
- Workstation
- ATX
- Modular
- Platinum
- Multi Rail
Est Value $3,034.94$758.73
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CP-DSKCH-7925G-BUN (Cisco 7925G Desk Top Charger, Power Supply, AC Power Cord)
4.7 (6)- Power Supply
- 850W
- Gaming / Workstation / General Use
- ATX
- Modular
- Gold
- Single Rail
Est Value $195.00$101.00
48.2% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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865408-B21 (HPE 500W FS PLAT HT PLG LH PWR SPLY KIT PL-SI)
4.6 (5)- Power Supply
- 850W
- Gaming / Workstation
- ATX
- Modular
- Gold
- Multi Rail
Est Value $351.04$105.32
70% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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JPSU-350-AC-AFO (350W AC PWR SUP FRONT TO BACK AIRFLOW FOR EX4300)
4.4 (5)- Power Supply
- 400W
- Gaming / Workstation / General Use
- ATX
- Non-Modular
- Bronze
- Single Rail
Est Value $500.76$125.20
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828735-B21 (HPE 900W AC 240VDC Pwr Backplane FIO Kit)
4.6 (5)- Power Supply
- 850W
- Gaming
- ATX
- Modular
- Gold
- Multi Rail
Est Value $237.73$133.13
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JPSU-150-AC-AFO (EX3400 150W AC POWER SUPPLY FRONT-TO-BACK AIRFLOW POWER CORD)
4.4 (5)- Power Supply
- 150W
- General Use
- ATX
- Non-Modular
- 80 PLUS
- Single Rail
Est Value $500.76$155.24
69% offFirst-Time Buyer Discount – Get up to 2% additional off on your first order
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LEARNFilters (299) 
Questions & Answers
What is a power supply unit (PSU)?
A PSU converts AC mains power to regulated DC voltages, distributes stable current to all PC components, and protects against voltage spikes.
How do I determine the right PSU wattage for my computer?
Sum the maximum power draw of CPU, GPU, drives, and peripherals, then add 20–30% headroom to select a reliable PSU wattage.
What does 80 PLUS certification mean?
An 80 PLUS rating guarantees at least 80% conversion efficiency at 20%, 50% and 100% loads, reducing energy waste and heat output.
What is the difference between modular, semi-modular, and non-modular PSUs?
Modular PSUs detach all cables, semi-modular has fixed essential cables, and non-modular has permanently attached cables, affecting build flexibility and cable management.
Why is PSU efficiency important?
Higher efficiency means less energy lost as heat, lower electricity costs, improved system stability, and reduced internal component stress.
How many +12V rails should my PSU have?
Modern PSUs typically use a single high-capacity +12V rail for simplicity and maximum power delivery; multi-rail units split output for added safety.
What standard power connections do PSUs include?
Standard PSUs provide a 24-pin ATX, 8-pin EPS for CPU, 6/8-pin PCIe for GPUs, SATA for drives, and Molex for legacy devices.
How long is the typical lifespan of a PSU?
Quality PSUs last 5–10 years under normal use; high temperatures, heavy loads, and low-quality capacitors can shorten their lifespan.
What are common signs of a failing PSU?
Frequent shutdowns, random reboots, voltage irregularities, burning smells, loud fan noise, and failure to power on indicate PSU issues.
How can I test a PSU for proper function?
Use a dedicated PSU tester or multimeter to measure voltage rails under load; ensure outputs stay within ±5% of rated values.
Can any PSU work with all motherboards?
A PSU must match the motherboard's ATX form factor, connector types, and power requirements; check compatibility before purchase.
Should I buy a higher-wattage PSU than I need?
Selecting a PSU with moderate headroom (20–30% above peak load) optimizes efficiency and future-proofs upgrades without excessive oversizing.
Do PSU cooling fans affect system noise?
Yes. Larger, low-RPM fans and hybrid/semi-passive modes run quieter under light loads, reducing overall system noise.
How should I maintain and clean my PSU?
Regularly remove dust with compressed air, ensure unobstructed airflow, and keep ambient temperatures below 35°C for optimal performance.
Can I upgrade my PSU in an existing PC build?
Yes. Ensure the new PSU fits your case, provides required connectors, meets wattage needs, and matches or exceeds efficiency certification.
What PSU specifications are ideal for gaming PCs?
For mid-range gaming, choose an 80 PLUS Gold 600W PSU. For high-end multi-GPU rigs, opt for 750W+ Gold or Platinum certified units.