G1251-0350WNA – 350W CRPS Power Supply with Smart Thermal Management & Global Input Support
The G1251-0350WNA is a 350-watt CRPS-format power solution tailored for mission-critical servers, network appliances, and storage systems. Its 1U low-profile housing (185 x 73.5 x 40 mm) makes it an excellent choice for compact, high-density deployments. Designed with global compatibility in mind, it operates across a broad voltage spectrum: 90–264V AC or 180–300V DC.
Delivering a stable 12V output at 29.16A and 12Vsb at 2.1A, this power module integrates digital power management and supports PMBus 1.2 protocol for remote monitoring and smart system control. Active Power Factor Correction enhances energy conversion efficiency and maintains power stability under varying loads.
Its intelligent cooling system automatically adjusts fan speed to reduce noise while maintaining optimal temperatures. For integration flexibility, a reverse airflow version is available. Certified by UL, CE, FCC, CB, and CCC, the G1251-0350WNA meets rigorous international safety and EMC standards—ensuring peace of mind for system designers and integrators.
Features
CRPS-185: 185×73.5x40mm(LxWxH)
Input: 90 to 264Vac,180-300VdC
Hot-plug
Full Digital control
Active Power Factor Correction
Intelligent-thermal Fan Control
N+N N+1 Redundant
Reverse Airflow Option
Applications
Server
Storage
Networking
HPC
AI Data Centers
Cloud Computing
Enterprise IT Systems
Medical Imaging Equipment
Approvals
UL/cUL
CB
TuV-Mark
CCC/CQC
FCC
CE
NOM
BIS
Specifications
|
Output Power (W): |
350 |
|
Length (mm): |
185 |
|
Width (mm): |
73.5 |
|
Height (mm): |
40 |
|
Mounting Type: |
Hot pluggable |
|
Minimum Output Current (A): |
0 |
|
Maximum Output Current (A): |
29.16 |
|
Output Voltage (V): |
12 |
|
Minimum Output Power (W): |
0 |
|
Maximum Output Power (W): |
350 |
|
Minimum Input Voltage (V): |
90 |
|
Maximum Input Voltage (V): |
264 |
Model Selection Comparison Table
|
Model |
Power | Output Current | PMBus | Form Factor | Recommended Use |
| G1251-0150WNA | 150W | Low-power 12V output | Yes | CRPS-185 |
Embedded, micro-edge compute |
| 250W | 12V with higher headroom | Yes | CRPS-185 | Network appliances with more load | |
| G1251-0350WNA | 350W | 12V mid-range output | Yes | CRPS-185 |
SMB servers, storage nodes |
| 460W | 12V sustained high output | Yes | CRPS-185 | Compute+I/O mixed systems | |
| G1251-0550WNA | 550W | 12V top segment output | Yes | CRPS-185 |
Dense and multi-device rails |
Deployment Scenarios
The G1251-0350WNA targets mid-power server nodes, storage-leaning platforms and network appliances where 12V power demand rises beyond the 250W class. It offers a balanced output range for mixed compute + I/O workloads, supporting moderate virtualization stacks, RAID storage, and multi-interface gateways. This power tier fits environments expecting sustained processing activity without entering high-density power territory where thermal handling becomes more complex.
|
Scenario |
What system demands | Why G1251-0350WNA fits |
| SMB servers | Moderate compute + storage balance |
350W rating supports dual-CPU small nodes and mixed PCIe traffic without instability. |
|
NAS with multiple drives |
Spin-up current + sustained I/O | Comfortable headroom for HDD/SSD arrays and caching workloads. |
| Virtualized micro-servers | VM orchestration + continuous uptime |
Holds stable under mixed CPU/network peaks common in virtualization. |
|
Edge compute clusters |
Multi-node data processing | Mid-range output avoids oversizing while adding growth headroom. |
| Security & camera NVR | Storage + encoder load |
Handles decoder/encoder power along with disk access cycles. |
|
5G MEC micro-units |
Low-latency compute with networking | Power margin absorbs radio/packet bursts without ripple. |
| Industrial automation | Real-time logic + moderate expansion |
Suitable for I/O boards, PLC units and small AI modules. |
|
Test lab R&D platforms |
Frequent re-configuration |
Flexible middle tier when swapping accelerators or NIC cards. |
Power Architecture & Reliability Design
G1251-0350WNA builds on the 250W tier with increased current capability for storage-assisted computing, multi-NIC networking, and longer duty cycle workloads. Positioned as the mid-range anchor of the G1251 family, it manages both CPU draw and peripheral surges without the thermal overhead associated with 460W+ units. The electrical stage is tuned for steady efficiency around common real-world usage — partial load during baseline activity and elevated peaks when I/O or VM workloads ramp.
Voltage regulation is maintained under burst conditions such as RAID access, multi-stream encoding or transient inference tasks. The PMBus telemetry interface enables monitoring of temperature, load behavior and protective thresholds, simplifying preventive maintenance in distributed environments. This model is particularly suited to cluster nodes and departmental servers where reliability matters more than extreme watt density. Key architectural notes:
- Stable 12V rail designed for sustained moderate workloads.
- Optimized for NAS, edge compute, small virtualization pools.
- Lower footprint than high-power units — easier chassis thermal design.
- PMBus monitoring reduces downtime risk in remote facilities.
- Supports redundant shelf operation when paired in N+1.
- Extended component derating for 24/7 deployment conditions.
- Soft-start and protection logic against over-current and short fault events.
- Good balance of efficiency vs. capacity without overspec waste.
Power Operating Notes
|
Reference Condition |
Suggested Guidance |
| Recommended load window |
Operate between ~45–85% for optimal lifetime and efficiency. |
|
Thermal flow requirement |
Maintain clean airflow; avoid warm recirculation in compact cases. |
| Redundancy planning |
Ensure remaining modules sustain full load during N+1 events. |
|
Storage surge events |
Suitable for mid-size RAID sets with predictable spin-up demand. |
|
Fan curve tuning |
Coordinate with PSU thermal response to prevent rapid cycling. |
| Remote monitoring |
Use PMBus logs to identify early signs of voltage drift or thermal stress. |
|
Field service practice |
Treat as CRPS FRU — rapid replacement reduces outage time. |
| Scaling consideration |
If future PCIe or GPU upgrades are expected, evaluate 460W tier. |
FAQ
Q1. Does G1251-0350WNA support redundant operation?
Yes — suitable for N+1 or 1+1 designs when capacity margin is reserved.
Q2. Can this PSU be customized for OEM integration?
Yes — interface, labeling and control parameters can be adjusted per project.
Q3. What compliance & safety coverage does it carry?
Designed to meet safety/EMC requirements common to server & networking markets.
Q4. Which workload profile suits this model most?
Mid-range nodes handling mixed CPU, storage and moderate networking traffic.
Q5. Where does G1251-0350WNA best fit in sizing hierarchy?
It sits between 250W and 460W — ideal for SMB servers and moderate RAID loads.
Q6. Is it suitable for multi-drive NAS units?
Yes — sufficient current headroom for array spin-up and continuous I/O duty.
Q7. Can it run small inference accelerators?
Yes for light cards/NPU add-ons; high-power GPU use should move to larger watt class.
Q8. Recommended upgrade direction when scaling further?
Move to G1251-0460WNA or G1251-0550WNA when adding GPUs or dense storage trays.