G1251-0550WNA – 550W CRPS Power Module for Enterprise Servers and Data Systems
The G1251-0550WNA delivers robust 550W performance in a space-efficient 1U CRPS enclosure (185 x 73.5 x 40 mm), purpose-built for high-performance servers, storage nodes, and communication infrastructure. Designed for redundant operation, it ensures continuous uptime in mission-critical environments.
This model supports global power standards with a wide AC/DC input range (90–264V AC / 180–300V DC), outputting 12V at 45.83 amps alongside a 12V standby at 2.1 amps. Enhanced with digital power control and PMBus 1.2 functionality, it allows real-time data reporting, remote power adjustments, and proactive system management.
The inclusion of active PFC boosts power efficiency while stabilizing voltage under varying load conditions. Adaptive fan regulation minimizes noise without compromising cooling performance. Additionally, a reverse airflow configuration is available to support non-standard system layouts.
Certified to key international safety and electromagnetic compatibility standards (UL, CE, FCC, CB, CCC), the G1251-0550WNA is a reliable choice for global deployments in next-generation IT architectures.
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): |
550 |
|
Length (mm): |
185 |
|
Width (mm): |
73.5 |
|
Height (mm): |
40 |
|
Mounting Type: |
Hot pluggable |
|
Minimum Output Current (A): |
0 |
|
Maximum Output Current (A): |
45.83 |
|
Output Voltage (V): |
12 |
|
Minimum Output Power (W): |
0 |
|
Maximum Output Power (W): |
550 |
|
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 G1251-0550WNA represents the top-power option in the G1251 CRPS-185 line, delivering a robust 550W 12V rail for dense compute layouts, multi-device backplanes, clustered NAS storage, and scalable inference appliances that demand sustained headroom under continuous load. It is typically adopted when a system requires multiple expansion cards, accelerated I/O fanout, or aggregated drives with little tolerance for voltage sag during burst peaks. This model enables long-term deployment in environments where high operating ceiling and reliability outweigh minimal power budgets, making it suitable for servers approaching upper utilization boundaries while remaining within a compact CRPS-185 envelope.
|
Scenario |
What system demands | Why G1251-0550WNA fits |
| Multi-device storage chassis | High spin-up demand from HDD/SSD arrays |
Large 12V margin prevents droop under simultaneous power draw |
|
Edge compute with accelerators |
Burst consumption from AI inference cards | Stable high-amp delivery ensures undisturbed accelerator operation |
| Enterprise NAS clusters | Sustained throughput across multi-bay racks |
Maintains regulated output even at elevated continuous duty |
|
Mixed compute+I/O servers |
Boards with NICs, HBAs, and add-on cards | Extra power covers incremental modules without redesign |
| Scale-out micro-datacenters | Space-restricted shelves with hot-swap PSU |
CRPS-185 form maintains serviceability without expanding chassis |
|
Multi-tenant hosting racks |
Long runtime at high utilization | Durable power design avoids thermal fatigue in dense racks |
| Telecom aggregation | Redundancy-aware edge nodes |
Stable rail supports low-latency switching equipment |
|
Lab expansion platforms |
Frequent hardware changes |
Headroom supports module swaps and firmware testing smoothly |
Power Architecture & Reliability Design
G1251-0550WNA builds on the same electrical foundation as lower-power variants but operates with a significantly larger power envelope to accommodate heavy I/O and compute density. The 12V supply rail is tuned for consistent output during top-range loading, while component selection and thermal layout improve margin against voltage collapse during peak concurrency. Systems that demand multi-lane storage bandwidth, PCIe adapters, or virtualization nodes benefit from improved transient recovery behavior and ripple control. The power module favors continuous duty operation with staged protection mechanisms and low-noise switching design, reducing long-term stress and extending operational longevity in always-on environments. Notable attributes:
- High reserve capacity for multi-device service without throttling overhead.
- Appropriate for mixed workloads blending compute, storage, networking.
- Long-run reliability supported by staged fault protection and current supervision.
- Good thermal balance considering output tier, suitable for 24/7 workloads.
- Sustains voltage under burst and spin-up draw without instability.
- Smooth CRPS-185 integration for scalable shelves and blade-style clusters.
- Ideal for racks approaching utilization ceilings where upgrade avoidance matters.
- Telemetry readiness allowing monitoring and predictive maintenance strategies.
Power Operating Notes
|
Reference Condition |
Suggested Guidance |
| Operating near continuous rating |
Ensure airflow direction aligns with chassis pressure layout |
|
High storage spin-up events |
Consider staggered spin-up where possible to reduce instantaneous load |
| Redundant PSU configuration |
Maintain headroom so single-unit failure remains within tolerance |
|
Persistent full-load racks |
Recommended monitoring via PMBus for temperature & rail telemetry |
| High-density blade arrays |
Check backplane copper trace limits to avoid rail bottleneck |
|
Multi-accelerator boards |
Verify PCIe card peak draw aligns with 12V surge envelope |
| Low-airflow enclosures |
Use with active duct or fan profile to maintain thermal stability |
|
Firmware development rigs |
Monitor current ripple when frequently flashing hardware |
FAQ
Q1. Does it support PMBus?
Yes, enabling remote telemetry, fan profile reading, and operational analysis.
Q2. Can it be used in redundant shelves?
Yes, when shared with identical CRPS-185 units maintaining fallback capacity.
Q3. Is it mechanically interchangeable with other G1251 variants?
Yes — identical CRPS-185 mechanical outline.
Q4. Typical deployment class?
Dense multi-module servers, storage racks, mid-edge computing, scalable appliances.
Q5. When should I choose 550W over 460W?
When future expansion or sustained full-duty runtime is expected beyond mid-range limits.
Q6. Is it suitable for high drive count NAS?
Yes, its upper-tier margin makes it well adapted to large array cold starts.
Q7. Can it power multi-accelerator inference nodes?
Applicable for small-to-mid accelerator loads where power spikes are expected.
Q8. Recommended upgrade path if power demand grows further?
Transition to higher series such as G1236 for multi-GPU or compute-dense designs.