G1251-0460WNA – 460W High-Density CRPS Redundant Power Supply with PMBus and Global Compliance
Built for today’s performance-intensive IT infrastructure, the G1251-0460WNA 460W CRPS power supply provides dependable power delivery for servers, enterprise storage, and networking hardware. Its ultra-compact CRPS-standard 1U footprint (185 x 73.5 x 40 mm) is optimized for rack-mounted systems where space efficiency is essential.
Capable of delivering 12V output at 38.3 amps and a 12V standby rail at 2.1 amps, this unit supports both 90–264Vac and 180–300Vdc input voltages—ensuring worldwide applicability. The integrated PMBus 1.2 digital interface offers precise monitoring and full remote control, enabling seamless system integration and proactive fault management.
Thanks to active PFC and intelligent thermal design, the G1251-0460WNA achieves high operational efficiency while maintaining low acoustic levels through smart fan speed regulation. A reverse airflow variant is available for designs requiring directional cooling customization.
Compliant with major safety and EMC certifications including UL, CE, FCC, CB, and CCC, this power supply ensures reliable performance and regulatory adherence across multiple markets.
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): |
460 |
|
Length (mm): |
185 |
|
Width (mm): |
73.5 |
|
Height (mm): |
40 |
|
Mounting Type: |
Hot pluggable |
|
Minimum Output Current (A): |
0 |
|
Maximum Output Current (A): |
38.3 |
|
Output Voltage (V): |
12 |
|
Minimum Output Power (W): |
0 |
|
Maximum Output Power (W): |
460 |
|
Minimum Input Voltage (V): |
90 |
|
Maximum Input Voltage (V): |
264 |
Model Selection Comparison Table
|
Model |
Power | Output Current | PMBus | Form Factor |
Recommended Use |
| 150W | Low-power 12V output | Yes | CRPS-185 | Embedded, micro-edge compute | |
| G1251-0250WNA | 250W | 12V with higher headroom | Yes | CRPS-185 |
Network appliances with more load |
| 350W | 12V mid-range output | Yes | CRPS-185 | SMB servers, storage nodes | |
| G1251-0460WNA | 460W | 12V sustained high output | Yes | CRPS-185 |
Compute+I/O mixed systems |
| 550W | 12V top segment output | Yes | CRPS-185 | Dense and multi-device rails |
Deployment Scenarios
The G1251-0460WNA targets compute + I/O mixed systems where a higher continuous 12V envelope is required for servers equipped with multiple NICs, cache-heavy storage, or lightweight accelerators. Positioned above the 350W class, it offers sustained delivery headroom for components that operate under frequent burst behavior, such as indexing engines, video analytics modules and edge inference gateways. Systems adopting this tier typically value consistent throughput over peak-only sizing, needing stable operation during long-running computational tasks.
|
Scenario |
What system demands | Why G1251-0460WNA fits |
| Mid-scale compute servers | CPU + RAM + I/O concurrency |
460W stable output supports heavier application load without voltage sag. |
|
Virtualization clusters |
VM density + switching overhead | Extra watt margin reduces failure risk during migration spikes. |
| Storage + compute hybrid nodes | Cache workloads + disk/SSD activity |
Sustains combined I/O + compute draw without throttling. |
|
AI inference at edge |
Bursty NPU/ASIC activity | Handles short ML acceleration peaks common in inference gateways. |
| SD-WAN / multi-NIC routers | Packet routing + acceleration |
Power buffer prevents instability when interfaces surge. |
|
Industrial analytics units |
24/7 processing & control | Good tolerance to sustained workload patterns; ideal for factories. |
| Small HPC test racks | Mixed logic boards + PCIe cards |
Allows experimentation without immediate watt ceiling. |
|
On-prem mini-data nodes |
Growth-ready deployment |
Suitable for incremental upgrades without PSU replacement. |
Power Architecture & Reliability Design
G1251-0460WNA scales the CRPS-185 architecture to support more demanding compute and I/O concurrency. The regulation stage is designed for load stability over long-cycle processes, making it suitable for analytics nodes, virtualization pools and moderate AI inference workloads. Efficiency is tuned for the mid-to-upper operating range, where real-world systems often reside when running continuous processing rather than idle-burst patterns.
The DC power path supports sustained current without excessive ripple, ensuring predictable operation for PCIe cards, multi-NIC configurations or storage controllers under queue pressure. Thermal design maintains reliability under elevated draw, avoiding derating issues when the platform expands over time. PMBus telemetry gives operators visibility into temperature, load fluctuations and event logs — enabling data-driven maintenance and lower risk in distributed site operation. Notable attributes:
- High continuous current provisioning reduces throttling in composite workloads.
- Strong balance for mixed compute/storage/networking architectures.
- Designed for stable 24/7 rack operation with protective circuitry.
- PWM control and component derating improve long-term lifespan.
- Well suited for expansion-ready servers without overshooting into 550W class.
- Clean integration into CRPS-185 shelves, ideal for scale-out units.
- Sustains heavier I/O bursts without voltage instability.
- Telemetry simplifies predictive maintenance & remote fleet management.
Power Operating Notes
|
Reference Condition |
Suggested Guidance |
| Typical operating window |
Best longevity when utilized around 50–85% sustained load. |
|
Airflow planning |
Ensure unobstructed cooling path — avoid recirculation in dense racks. |
| Storage surge |
Suitable for RAID-accelerated workloads with active read/write cycles. |
|
Redundancy use |
Verify remaining unit capacity meets peak requirements under failover. |
| Hot environment |
Consider fan curve tuning when inlet air exceeds typical spec. |
|
PMBus monitoring |
Use telemetry to track sequential load rise or thermal shift trends. |
| Servicing |
CRPS hot-swap behavior simplifies replacement without downtime. |
|
Scaling |
If GPUs or compute accelerators planned later, evaluate 550W upgrade. |
FAQ
Q1. Does this PSU support PMBus?
Yes — full monitoring/telemetry available for remote operation.
Q2. Can it run in N+1 configuration?
Yes — provided remaining capacity > peak system load after failover.
Q3. Is G1251-0460WNA mechanically compatible with other G1251 units?
Yes — same CRPS-185 format across the lineup.
Q4. What application tier is this model targeted for?
Compute + I/O blended workloads needing sustained watt budget.
Q5. How does it differ from 350W version?
Higher continuous load capability for heavier virtualization or storage tasks.
Q6. Can it support small accelerator cards?
Yes — suitable for NPUs/ASIC edge inference; heavy GPUs should use 550W.
Q7. Recommended deployment if planning node growth?
Position as mid-upper tier baseline — scalable without immediate PSU swap.
Q8. Where does 0460W fit for multi-NIC appliances?
Ideal choice — watt margin absorbs routing bursts and encryption overhead.