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55Y9321 135W AC Adapter offers stable high-watt charging for ThinkPad performance laptops.
55Y9321
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ThinkPad 135W AC Adapter - EU1 / Saudi Arabia / Indonesia_x0...
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55Y9321
- Description:
- ThinkPad 135W AC Adapter - EU1 / Saudi Arabia / Indonesia_x005F_x000D__x005F_x000D_
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- Brand:
- Lenovo
- GTIN:
- 887168852227
- Condition:
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55Y9321 Overview
55Y9321 is a high-performance 650W modular ATX power supply designed for demanding applications in gaming, workstations, and server environments. It features an 80 PLUS Gold certification ensuring outstanding efficiency at 92%, an input voltage range of 100–240V, and Active PFC for optimal power regulation. The unit incorporates a robust 135mm fluid dynamic fan with Zero RPM mode for quiet operation and is built with strict protections including OCP, OVP, SCP, and OTP to safeguard connected components.
This power supply comes equipped with a full set of essential connectors, including one ATX 24-pin connector, one EPS (CPU) 4+4 pin connector, two PCIe (6+2) connectors for GPU support, six SATA power connectors, and four Molex connectors. Constructed with a sleeved cable design and engineered for superior build quality, 55Y9321 is tailored to meet the rigorous demands of modern gaming setups, workstations, and even rack server applications.
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55Y9321 Specifications
- Product Type
- Power Supply
- Brand
- Lenovo
- Wattage
- 650W
- Use Case
- Gaming
- Form Factor
- ATX
- Modularity
- Modular
- 80 PLUS Certification
- Gold
- Rail Configuration
- Single Rail
- Certifications
- 80 PLUS / CE / FCC / UL / ROHS
- Remote Monitoring
- No
- Input Voltage
- 100–240V
- Hot-Swap Capable
- No
- PFC (Power Factor Correction)
- Active PFC
- Fan Size
- 135mm
- Fan Bearing Type
- Fluid Dynamic
- Zero RPM Mode
- Yes
- Efficiency Rating
- 92%
- Protections
- OCP / OVP / SCP / OTP
- ATX 24-Pin Connectors
- 1
- EPS (CPU) 4+4 Pin
- 1
- PCIe (6+2) Connectors
- 2
- SATA Power Connectors
- 6
- Molex Connectors
- 4
- Floppy Connector
- No
- Cable Type
- Sleeved
- RGB Lighting
- No
- MTBF (Mean Time Between Failures)
- 150,000 hours
- Operating Temperature
- 50°C
- Product Name
- 55Y9321 High-Performance Modular ATX Power Supply
- Height
- 5.4 inches
- Width
- 5.9 inches
- Depth
- 6.3 inches
- Weight
- 4.8 lbs
Quality Certifications
Product Comparison Table 
| 55Y9321 |  0B46998 |  4X20E75061 |  0B47036 |  0B95806 | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 650W | 750W | 750W | 750W | 600W |
| Use Case | Gaming | Gaming | Gaming / Workstation / Rack Server | Gaming / Workstation | Gaming |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Modular | Modular | Modular | Modular | Semi-Modular |
| 80 PLUS Certification | Gold | Gold | Gold | Platinum | Gold |
| Rail Configuration | Single Rail | Multi Rail | Multi Rail | Single Rail | Single Rail |
| Certifications | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS |
| Remote Monitoring | No | No | No | No | No |
| Input Voltage | 100–240V | 100–240V | 100–240V | 100–240V | 110–240V |
| Hot-Swap Capable | No | No | No | No | No |
| PFC (Power Factor Correction) | Active PFC | Active PFC | Active PFC | Active PFC | Active PFC |
| Fan Size | 135mm | 120mm | 135mm | 135mm | 120mm |
| Fan Bearing Type | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Ball |
| Zero RPM Mode | Yes | Yes | Yes | Yes | Yes |
| Efficiency Rating | 92% | 92% | 92% | 94% | 92% |
| Protections | OCP / OVP / SCP / OTP | OCP / OVP / SCP / OTP | OCP / OVP / UVP / SCP / OTP / OPP / Surge / Brown Out | OCP / OVP / UVP / SCP / OTP | OCP, OVP, SCP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 1 | 1 | 2 | 1 | 1 |
| PCIe (6+2) Connectors | 2 | 2 | 2 | 2 | 2 |
| SATA Power Connectors | 6 | 6 | 6 | 6 | 4 |
| Molex Connectors | 4 | 3 | 4 | 3 | 3 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Sleeved | Sleeved | Sleeved | Sleeved | Sleeved |
| RGB Lighting | No | No | No | No | No |
| MTBF (Mean Time Between Failures) | 150,000 hours | 150,000 hours | 150,000 hours | 150,000 hours | 150,000 hours |
| Operating Temperature | 50°C | 50°C | 40°C | 40°C | 50°C |
| Product Name | 55Y9321 High-Performance Modular ATX Power Supply | 0B46998 High-Performance Modular ATX Power Supply | 4X20E75061 750W Fully Modular ATX Power Supply | 0B47036 750W Platinum Modular ATX Power Supply | 0B95806 High Efficiency Power Supply |
| Height | 5.4 inches | 5.5 inches | 5.0 inches | 5.5 inches | 5 inches |
| Width | 5.9 inches | 6.3 inches | 6.3 inches | 6.3 inches | 6 inches |
| Depth | 6.3 inches | 3.1 inches | 5.5 inches | 3.4 inches | 3 inches |
| Weight | 4.8 lbs | 4.2 lbs | 4.2 lbs | 4.5 lbs | 4.5 lbs |
Reviews & Ratings
N
Nathaniel Rhodes
4
Reliable OEM adapter for demanding workloads.
O
Oliver Sinclair
5
Consistent output and durable build quality.
P
Patrick Knox
5
Handles high-power laptops efficiently.
Q
Quentin Avery
5
Dependable power supply for enterprise users.
R
Ryan Morton
5
Stable and long-lasting adapter performance.
Questions & Answers
What is the Lenovo ThinkPad 135W AC Adapter (SKU 55Y9321)?
The Lenovo ThinkPad 135W AC Adapter (SKU 55Y9321) is a genuine OEM power adapter designed to deliver reliable 135W charging to compatible ThinkPad laptops in EU, Saudi Arabia, and Indonesia.
Which ThinkPad models are compatible with the 55Y9321 135W AC Adapter?
The 55Y9321 adapter is compatible with Slim Tip–equipped ThinkPad P-series, T-series and X-series laptops requiring up to 135W, including P53, P73, T15, X1 Extreme and similar models.
What input voltage range does the 135W AC Adapter support?
The adapter supports a universal 100–240 V AC input at 50–60 Hz, making it suitable for use in EU, Saudi Arabia, and Indonesia power grids.
What are the output specifications of the ThinkPad 135W AC Adapter?
It delivers a DC output of 20 V at 6.75 A (135 W) via Lenovo’s Slim Tip connector, ensuring fast and stable charging.
What connector type does SKU 55Y9321 use?
The adapter features Lenovo’s rectangular Slim Tip connector, designed for secure, high-power delivery to ThinkPad laptops.
Does the 135W AC Adapter include a detachable power cable?
Yes, the SKU 55Y9321 package includes a detachable regional power cord (EU plug) compatible with Saudi Arabia and Indonesia outlets.
Can I use this adapter outside EU, Saudi Arabia, or Indonesia?
Yes. You can pair the 135W adapter with the appropriate regional power cable or plug adapter to match local outlet standards.
How can I verify the authenticity of my Lenovo 55Y9321 adapter?
Check for the Lenovo holographic security label, matching SKU/serial number on the housing, and purchase from authorized Lenovo channels.
What safety and regulatory certifications does the 135W AC Adapter hold?
The adapter is certified to CE, FCC, UL, IEC and CCC standards, offering built-in overvoltage, overcurrent and short-circuit protection.
What is the length of the power cable on the ThinkPad 135W adapter?
The detachable AC power cord measures approximately 1.8 meters, providing flexible placement and ease of use.
What are the physical dimensions and weight of SKU 55Y9321?
The adapter brick measures about 136 × 48 × 31 mm and weighs approximately 350 g (excluding the power cable).
Does the adapter support rapid or ExpressCharge charging?
Yes, when used with a compatible ThinkPad that supports Lenovo ExpressCharge™, it can fast-charge from 0 % to 80 % in around one hour.
Is there an LED indicator on the 135W AC Adapter?
Yes, a built-in LED indicator on the Slim Tip connector glows white when the adapter is actively supplying power.
What warranty covers the ThinkPad 135W AC Adapter (55Y9321)?
Lenovo provides a one-year limited warranty covering defects in materials and workmanship on the 135W AC Adapter.
Where can I purchase the genuine Lenovo 55Y9321 135W AC Adapter?
Buy directly from Lenovo’s online store, authorized Lenovo resellers or certified e-commerce distributors to ensure authenticity and warranty coverage.