G1251-0250WNA – 250W CRPS Power Supply for Compact Server & Network Systems

G1251-0250WNA CRPS power supply edge connector

G1251-0250WNA server power supply side view

G1251-0250WNA redundant server power module

G1251-0250WNA hot swap power supply with cooling fan

G1251-0250WNA server PSU specification label

G1251-0250WNA CRPS server power supply module

G1251-0250WNA – 250W CRPS Power Supply for Compact Server & Network Systems

Designed for advanced server, storage, and edge networking equipment, the G1251-0250WNA 250W power supply delivers reliable and efficient power in a space-saving CRPS 1U chassis (185 x 73.5 x 40 mm). Its universal input compatibility (90–264V AC / 180–300V DC) makes it ideal for global deployments. Output includes 12V main at 20.83 amps and a dedicated 12Vsb at 2.1 amps for standby operations. With digital regulation and PMBus 1.2 support, this PSU offers intelligent monitoring, remote diagnostics, and precision control. Built-in active PFC maximizes power conversion efficiency, while smart fan technology ensures quiet thermal management. The reverse airflow design option adds flexibility for airflow-sensitive deployments. Certified to meet major international safety and EMC standards (UL, CE, FCC, CB, CCC), the G1251-0250WNA is a dependable choice for OEMs and system integrators building scalable, energy-conscious platforms.

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

TuV-Mark

CCC/CQC

FCC

NOM

BIS

Specifications

Output Power (W):	250
Length (mm):	185
Width (mm):	73.5
Height (mm):	40
Mounting Type:	Hot pluggable
Minimum Output Current (A):	0
Maximum Output Current (A):	20.83
Output Voltage (V):	12
Minimum Output Power (W):	0
Maximum Output Power (W):	250
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
G1251-0250WNA	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
G1251-0460WNA	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 G1251-0250WNA is the second-tier power option within the G1251 CRPS-185 platform, delivering 250W continuous 12V output for systems requiring more headroom than 150W while still prioritizing compact form factor efficiency. It is well suited for network appliances, SMB server builds, micro-edge compute nodes and light virtualized platforms where moderate expansion capabilities and stable load handling determine long-term service reliability. The additional watt margin makes this model ideal for multi-NIC environments, storage-heavy workloads, sensor aggregation units, and compact AI inference devices with intermittent power bursts.

Scenario	What system demands	Why G1251-0250WNA fits
Network Appliances & Firewalls	Sustained traffic throughput, multiple NICs	250W provides enough 12V headroom for switching and packet bursts
SMB Servers	CPU + moderate storage + peripheral cards	Handles mixed load without voltage ripple during transitions
Edge Virtualization Nodes	Light VM workloads with peak spikes	More buffer than 150W for CPU/IO surge cycles
Micro NAS / Storage Clusters	Multi-drive spin-up and continuous activity	Stable 12V output prevents startup brownout
Distributed Gateway Units	Remote fleet deployment with hot-swap	CRPS-185 allows quick field replacement
IoT Aggregation Systems	Numerous peripherals and sensors on 12V	Efficient partial-load behavior improves uptime
Compact AI/Inference Platforms	Small accelerator cards/ASIC modules	Enough reserve without stepping up to 350W class
Lab / R&D Modular Builds	Frequently reconfigured test nodes	Maintains margin through incremental upgrades

Power Architecture & Reliability Design

G1251-0250WNA builds upon the same electrical and mechanical foundation as the lower-watt model but adds sufficient capacity for moderate compute and storage scaling. Its 12V rail is optimized for stable operation under mixed workloads, where current peaks are driven by network traffic, drive spin-up or light inference operations. Designed for persistent runtime, this model favors efficiency under partial load ranges, reducing thermal output and extending component lifespan in 24/7 deployment. Core design strengths:

Higher 12V power margin accommodates multi-NIC networking and SSD storage
CRPS-185 standard footprint enables chassis-level interchange across the series
Optimized switching stage improves transient handling under load spikes
Excellent partial-load efficiency for edge and embedded runtime profiles
Full PMBus monitoring for power telemetry and remote maintenance tracking
Thermal distribution engineered for restricted airflow environments
OCP/OVP/OTP/SCP protection maintains system integrity during fault events
Long-life component selection supports high-availability deployments

Power Operating Notes

Reference Condition	Suggested Guidance
Continuous load planning	Maintain 40–85% utilization for balanced efficiency and life expectancy
Inlet temperature	Keep below 35°C for optimal thermal stability
Redundancy design	Works in 1+1 / N+1 shelves when reserve capacity is maintained
Storage start-up surge	Supports multi-drive spin-up without undervoltage drop
NIC / Expansion usage	Comfortable headroom for dual-NIC or moderate accelerator cards
Airflow layout	Ensure clear front-to-back ventilation path
PMBus telemetry	Track current trends for proactive failure avoidance
Serviceability	Treated as hot-swap FRU for rapid maintenance deployment

FAQ

Q1. Does G1251-0250WNA support redundant operation?
Yes. It can be used in 1+1 or N+1 configurations, provided total load is sized so redundancy is preserved after a single unit is removed or fails.

Q2. Can this PSU be customized for OEM platforms?
Yes. Connector mapping, labels and certain firmware parameters can be adapted for OEM integration, subject to project requirements.

Q3. What compliance and safety standards does it meet?
It is designed to comply with major global safety and EMC standards typically required for server and networking equipment (e.g., UL, CE, and related regional marks).

Q4. What is the recommended workload profile for this model?
It is recommended for low-to-medium power servers, network appliances and micro edge nodes where load rarely approaches the limit of higher-wattage units.

Q5. When should I choose G1251-0250WNA instead of G1251-0150WNA?
Choose the 250W model when the system includes additional NICs, more drives or higher-frequency CPUs that push total consumption beyond what a 150W unit can comfortably support.

Q6. Is G1251-0250WNA suitable for GPU-heavy workloads?
It is not intended for high-power GPU compute. For systems with discrete GPUs or large accelerators, a higher-wattage PSU from the same or another series is recommended.

Q7. How does this model affect thermal design in compact chassis?
The extra wattage still sits in a relatively modest power class, so it typically allows simple, front-to-back airflow designs without requiring aggressive fan speeds.

Q8. Can it be used as a drop-in upgrade in existing CRPS-185 designs?
Yes. As long as the design already supports the G1251 mechanical and electrical interface, G1251-0250WNA can replace a lower-watt model to provide more power headroom.