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4X20E50578
ThinkPad 170W AC Adapter (slim tip) - EU1 Countries/Indonesi...
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4X20E50578 is a high-performance ATX power supply delivering 500W, engineered with a semi-modular design and certified with 80 PLUS Gold for superior energy efficiency. It operates on an input voltage range of 100–240V with Active PFC and incorporates multiple protections including OCP, OVP, and SCP, while its 120mm fan with Fluid Dynamic bearing ensures efficient cooling with low noise levels.
Built with robust quality, 4X20E50578 features a comprehensive set of connectors including 1 ATX 24-pin, 1 EPS (CPU) 4+4-pin, 1 PCIe (6+2)-pin, 6 SATA power connectors, and 4 Molex connectors, all paired with sleeved cables for improved durability and management. This power supply is ideally suited for demanding environments such as gaming setups, workstations, and light server applications.
4X20E50578 price for new stock is is available on request. Get immediate quote. 4X20E50578 refurb price is $224.92.
Request bulk order quote for 4X20E50578 for additional pricing. Browse the full Lenovo Laptop Power Adapters series or explore all Lenovo products.
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| 4X20E50578 |  4X20E75061 |  40Y7700 |  55Y9321 |  Lenovo 7N67A00883 750W | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 500W | 750W | 700W | 650W | 750W |
| Use Case | Gaming / Workstation | Gaming / Workstation / Rack Server | Gaming / Workstation | Gaming | Workstation |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Semi-Modular | Modular | Modular | Modular | Non-Modular |
| 80 PLUS Certification | Gold | Gold | Gold | Gold | Bronze |
| Certifications | 80 PLUS / CE / FCC / UL | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS |
| Input Voltage | 100–240V | 100–240V | 100–240V | 100–240V | 100–240V |
| Hot-Swap Capable | No | No | No | No | No |
| PFC (Power Factor Correction) | Active PFC | Active PFC | Active PFC | Active PFC | Active PFC |
| Fan Size | 120mm | 135mm | 120mm | 135mm | 120mm |
| Fan Bearing Type | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Sleeve |
| Zero RPM Mode | No | Yes | Yes | Yes | No |
| Efficiency Rating | 92% | 92% | 94% | 92% | 85% |
| Protections | OCP / OVP / SCP | OCP / OVP / UVP / SCP / OTP / OPP / Surge / Brown Out | OCP / OVP / SCP | OCP / OVP / SCP / OTP | OCP / OVP / UVP / SCP / OTP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 1 | 2 | 1 | 1 | 1 |
| PCIe (6+2) Connectors | 1 | 2 | 2 | 2 | 2 |
| SATA Power Connectors | 6 | 6 | 6 | 6 | 4 |
| Molex Connectors | 4 | 4 | 4 | 4 | 3 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Sleeved | Sleeved | Sleeved | Sleeved | Flat |
| RGB Lighting | No | No | No | No | No |
| MTBF (Mean Time Between Failures) | 120,000 hours | 150,000 hours | 150,000 hours | 150,000 hours | 150,000 hours |
| Operating Temperature | 40°C | 40°C | 50°C | 50°C | 50°C |
| Product Name | 4X20E50578 High-Performance ATX Power Supply | 4X20E75061 750W Fully Modular ATX Power Supply | 40Y7700 High-Performance Modular ATX Power Supply | 55Y9321 High-Performance Modular ATX Power Supply | Lenovo 7N67A00883 750W Power Supply |
| Height | 3.4 inches | 5.0 inches | 5.1 inches | 5.4 inches | 5.5 inches |
| Width | 5.9 inches | 6.3 inches | 8.6 inches | 5.9 inches | 5.0 inches |
| Depth | 5.5 inches | 5.5 inches | 6.3 inches | 6.3 inches | 7.0 inches |
| Weight | 4.2 lbs | 4.2 lbs | 4.5 lbs | 4.8 lbs | 8.5 lbs |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reviewed on the 17 April 2022
4X20E50578 170W Slim Tip Adapter delivers powerful and steady charging for ThinkPad workstations.
Reviewed on the 12 May 2025
Strong and reliable OEM power supply.
Reviewed on the 6 November 2019
Consistent high-watt output under heavy use.
Reviewed on the 13 January 2018
Dependable charging with solid build quality.
Reviewed on the 2 July 2017
Stable performance for demanding laptops.
Reviewed on the 7 April 2019
Reliable adapter for professional environments.
The 4X20E50578 ThinkPad 170W AC Adapter (slim tip) is compatible with ThinkPad P Series (P50, P51, P52), T Series (T470, T480), X1 Carbon Gen5/Gen6, and other Lenovo laptops that require a 170W slim-tip power input.
Yes. The 4X20E50578 AC Adapter is designed for EU1 region power standards (230V, 50Hz) and includes an EU plug for seamless use across EU1 countries.
Yes. This adapter supports 100–240V AC input and can be used in Indonesia and Vietnam with the appropriate plug adapter.
The adapter accepts 100–240V~50–60Hz input and delivers a DC output of 20V ⎓ 8.5A (170W) through the proprietary 7.9mm×5.5mm slim-tip connector.
Yes. The 170W slim-tip adapter delivers higher wattage than standard models, enabling faster charging and consistent power delivery under heavy workloads.
Check for Lenovo holographic labels, correct Lenovo part numbers (4X20E50578), and safety certifications. Purchase from authorized Lenovo resellers for guaranteed authenticity.
Yes. The adapter features built-in overvoltage, overcurrent, short-circuit, and overheating protection to safeguard your laptop and battery.
The adapter comes with a 1.2 m power cable and a 1.8 m DC output cable, providing ample length for flexible device placement.
Yes. It meets ErP Lot 6 and ENERGY STAR® standards, ensuring high efficiency and reduced power consumption in standby and active modes.
No. The slim-tip adapter is designed for direct laptop charging. For docking station power, use the specially designed Lenovo dock power supply.
The 4X20E50578 AC Adapter comes with a standard one-year limited warranty covering defects in materials and workmanship.
Unplug the adapter, wipe it with a dry cloth, avoid liquids or abrasive cleaners, and store in a cool, dry place to maintain performance.
Yes. The 4X20E50578 adapter auto-ranges from 100V to 240V AC input, making it suitable for global travel with the correct regional plug.
The adapter holds CE, UL, FCC, CCC, and RoHS certifications, ensuring compliance with international safety and environmental standards.
Charging time varies by model and battery state. On average, a 0–80% charge completes in under an hour; full charge in approximately 1.5–2 hours.
United States
