SEVENTEAM ST-402HLP Atx Server Power Supply 400W

( Brand: Seventeam ), ( Manufacturer Part Number: ST-402HLP ), ( Part Type: Server Supply ), ( Unit Type: Unit )

Review SEVENTEAM Atx Server Power Supply

The **Seventeam ST-402HLP 400W ATX Server Power Supply** is a robust, high-performance power solution engineered to deliver reliable and efficient energy distribution for mid-range server, workstation, and IT infrastructure applications. Designed with enterprise-grade durability in mind, this fully modular power supply unit combines cutting-edge technology with meticulous engineering to ensure seamless operation in demanding environments. Operating at a nominal wattage of 400W, it provides a balanced power output of 12V, 5V, and 3.3V rails, making it ideal for systems requiring consistent and stable voltage regulation, such as gaming PCs, NAS setups, and small-scale server clusters. The fully modular design allows users to connect only the necessary cables, reducing cable clutter, improving airflow, and simplifying system maintenance critical factors in optimizing thermal efficiency and extending hardware longevity.

Under the hood, the ST-402HLP incorporates advanced **80 PLUS Bronze certification**, ensuring energy efficiency with an operating efficiency of up least 82% across a wide range of load conditions. This not only translates to lower electricity costs but also minimizes heat generation, allowing for quieter operation and reduced strain on cooling systems. The power supply is equipped with a **high-quality Japanese-made capacitor bank**, which enhances reliability by reducing the risk of capacitor failure a common point of failure in lower-quality units. Additionally, it features a **fully active PFC (Power Factor Correction)** circuit, which optimizes power draw from the wall outlet, further improving efficiency and reducing harmonic distortion.

Safety and stability are prioritized with the inclusion of **overvoltage, overcurrent, and short-circuit protection**, along with **over-temperature shutdown** mechanisms to prevent catastrophic failures. The robust construction includes a **fully shielded design**, which minimizes electromagnetic interference (EMI) and ensures compliance with international safety standards such as **CE, CB, and FCC**. The unit s **fanless or low-noise operation** (depending on the model variant) is achieved through a **high-efficiency cooling system**, with a single 80mm PWM-controlled fan that activates only under heavy loads, maintaining near-silent performance during light to moderate usage. This makes it particularly well-suited for noise-sensitive environments like home offices, server rooms, or data centers where operational tranquility is essential.

The ST-402HLP is built with **durability in mind**, featuring a **high-quality metal chassis** that provides structural integrity and protection against physical stress. Its **modular cable design** allows for easy customization, enabling users to detach and organize cables as needed, which is particularly advantageous for systems with limited space or those requiring frequent upgrades. The power supply is also **compatible with a wide range of ATX motherboards and server-grade components**, making it a versatile choice for both enthusiasts and professionals. Whether deployed in a high-performance gaming rig, a small business server, or a home automation hub, the ST-402HLP delivers a harmonious blend of power efficiency, reliability, and adaptability, ensuring that your system operates at peak performance with minimal downtime.

The **SevenTeam ST-402HLP 400W ATX Server Power Supply** is a budget-friendly option designed for entry-level servers, home labs, or basic IT infrastructure. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Affordability** The ST-402HLP is priced significantly lower than many branded server PSUs (e.g., Corsair, Supermicro, or APC), making it an attractive choice for users on a tight budget.

2. **Modular Design** It features a semi-modular design, allowing you to detach the main GPU cable while keeping essential cables (CPU, SATA, etc.) permanently connected. This can improve cable management in tight builds.

3. **Server-Grade Features** It includes a **PFC (Power Factor Correction)** circuit, which improves efficiency and reduces power draw from the grid. This is beneficial for 24/7 operation, though not as robust as full server-grade units.

4. **Fanless Operation (Passive Cooling)** The ST-402HLP has a **passive cooling** option (fanless) up to **300W load**, which reduces noise and eliminates fan failure risks. This is useful for quiet environments or low-power setups.

5. **Reliability for Basic Use** While not as high-end as enterprise PSUs, it is built to handle continuous operation, making it suitable for small servers, NAS devices, or home labs with modest power demands.

6. **ATX Form Factor Compatibility** It fits standard ATX cases, offering flexibility for users who may repurpose consumer-grade cases for server builds.

7. **Decent Efficiency Ratings** It meets **80 Bronze efficiency standards**, which is acceptable for non-critical applications. However, it does not achieve higher tiers (Silver/Gold), meaning slightly higher energy costs over time.

8. **Warranty & Support** SevenTeam typically offers a **3-year warranty**, which is reasonable for this price point, though customer support may not be as responsive as major brands.

---

### **Cons**

1. **Lack of Full Server-Grade Build Quality** Unlike units from **Supermicro, APC, or Corsair**, the ST-402HLP is not designed for high-end server reliability. It lacks features like **full redundancy, advanced monitoring, or extended MTBF (Mean Time Between Failures)**.

2. **Lower MTBF Rating** The MTBF (a measure of reliability) is not as high as enterprise-grade PSUs. While it may last years under normal conditions, it is not built for mission-critical environments where uptime is paramount.

3. **No Full Modularity** While semi-modular, it does not allow for full cable customization (e.g., detaching all cables), which can be a minor inconvenience in tight builds.

4. **Limited Overvoltage/Undervoltage Protection** Server-grade PSUs often include **tighter voltage regulation** and **overvoltage protection (OVP) for critical components**. The ST-402HLP may not offer the same level of protection against power fluctuations.

5. **No Redundancy or Hot-Swappable Options** For true server reliability, redundancy (e.g., dual PSUs) is essential. This unit does not support hot-swapping or redundant configurations.

6. **Potential for Higher Noise at Full Load** While it has a passive mode, the fan kicks in at higher loads, and some users report that it can be **loud under sustained heavy loads** (e.g., running multiple GPUs or high-end CPUs).

7. **Limited Documentation & Community Support** Unlike well-documented brands, SevenTeam lacks extensive community forums or detailed troubleshooting guides, which can be frustrating if issues arise.

8. **Not Ideal for High-Power Components** At **400W**, it is only suitable for **low-end CPUs, no GPUs, or minimal expansion**. Attempting to run a high-end CPU (e.g., Intel Xeon or AMD Threadripper) or even a mid-range GPU will likely exceed its capacity.

9. **Brand Reputation Concerns** SevenTeam is a lesser-known brand compared to **Corsair, Seasonic, or Supermicro**. While their products are functional, they may not have the same level of long-term reliability testing or brand trust.

10. **No LCD/LED Status Display** Server-grade PSUs often include **status LEDs or LCD displays** for monitoring. The ST-402HLP lacks this, making it harder to diagnose issues without opening the case.

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### **Conclusion**

The **SevenTeam ST-402HLP 400W ATX Server Power Supply** is a **cost-effective choice for basic server, NAS, or home lab use**, particularly if you prioritize **affordability, passive cooling, and semi-modular cables**. It is well-suited for:

- **Low-power servers** (e.g., running a single CPU with minimal RAM/SSDs).

- **Home NAS setups** (Synology, QNAP, or DIY NAS).

- **Budget home labs** (e.g., homelabs with low-end CPUs like Intel Celeron or AMD Ryzen 3).

- **Users who prefer quiet operation** (thanks to passive cooling up to 300W).

- **High-reliability environments** (e.g., production servers, databases, or critical infrastructure).

- **High-power builds** (e.g., multi-GPU setups, high-end CPUs, or future-proofing).

- **Users who need enterprise-grade support or redundancy**.

- **Applications requiring strict voltage regulation or advanced monitoring**.

If you are running a **low-demand server or NAS** and need a **budget-friendly, quiet option**, the ST-402HLP is a **decent choice**. However, if **reliability, redundancy, or future scalability** is a concern, investing in a **higher-end server PSU (e.g., Supermicro, APC, or Corsair)** would be a safer long-term decision.

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### **Recommendation**

- You need a **cheap, quiet, and semi-modular** PSU for a **low-power server/NAS**.

- You are running **Intel Celeron, AMD Ryzen 3/5, or similar low-end CPUs** with minimal peripherals.

- You prioritize **cost over brand reputation** and accept the trade-offs in reliability.

- You require **24/7 uptime for critical applications** (e.g., VPS hosting, databases).

- You plan to **upgrade components** (e.g., adding GPUs, high-end CPUs, or more storage).

- You need **redundancy, hot-swapping, or advanced monitoring**.

- You are running **high-power components** (e.g., Intel Xeon, AMD EPYC, or multiple GPUs).

- **Budget Server PSU:** *Supermicro SLP-400-1* ( $80) More reliable, better build quality, but still not enterprise-grade.

- **Mid-Range Server PSU:** *Corsair RM450x* ( $100) 80 Gold efficiency, modular, better for consumer-grade servers.

- **Enterprise-Grade PSU:** *APC Smart-UPS or Supermicro SLP-800-1* ( $150 ) For mission-critical setups with redundancy.

For most **home lab or NAS users**, the ST-402HLP is **fine for the price**, but if you can stretch your budget slightly, a **Supermicro or APC unit** will offer better long-term reliability.

Details:

The item has been used previously. Inventory 3/26. Model: St-402hlp, condition: Used - working condition.

part #: st402hlp prices

• $43.99-$110.00

specifications serverpowe:

• brand: Seventeam
• mpn: St-402hlp
• part type: Server Supply
• unit type: Unit

returns serverpowe:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days
• method: Money back

seller serverpowe:

• city: Longwood, Florida
• rating: 100.0%
• # reviews: 189

payments serverpowe:

• wallet: Apple-pay
• other
• credit card: Diners-club

general serverpowe:

• Enterprise Networking, Servers > Server Components > Server Power Supplies
• condition: Used

offer serverpowe:

• quantity: 1
• options: Ship-to-home
• best offers: True
• sold: 0
• availability: In Stock
• started: March 19, 2026

shipping serverpowe:

• class: Standard
• service: UPS Ground
• carrier: UPS
• cost: $48.79
• type: Calculated
• transit: 4-8 Days

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