- Home
- ITE Power Supply
- UES150-SPA4-OP | 12V 150W ITE Open Frame Power Supply
UES150-SPA4-OP | 12V 150W ITE Open Frame Power Supply
UES150-SPA4-OP Series
UES150-SPA4-OP is a 150W internal power module built for 1U networking gear and industrial PC integration. It outputs a high-current 12V rail at 12.5A. The main design advantage is the 33mm total height, which solves the clearance issues in slim 1U enclosures. It includes 6KV surge immunity to handle lightning and grid noise in outdoor telecom cabinets.
1U Space: 33.0mm height leaves an 11.45mm air gap in standard 1U chassis.
Surge: 6KV rating (IEC/EN 61000-4-5) protects against outdoor grid transients.
12V Rail: 12.5A continuous current for industrial mainboards and HDD arrays.
Winter Startup: Boots reliably at -25°C without needing internal heaters.
Efficiency: Meets Level VI standards. Standby draw is kept under 0.3W.
Models & Ratings
The UES150-120YYYSPA4-OP provides a dedicated 12V rail. It is built for hardware that draws heavy current during startup, such as multi-drive NAS systems or industrial controllers. The 12.5A capacity ensures the voltage won’t drop when the system spikes. The “YYY” part of the model name means we can factory-set the current anywhere from 0.01A to 12.5A to match your specific thermal load and current limits.
| Model Number | Power(W) | Input Voltage Range(VAC) | Output Voltage(VDC) | Output Current(A) | Operating Temperature Range(℃) | Safety Standards |
| UES150-120YYYSPA4-OP | 150 | 90-264 | 12 | 0.01-12.5 | -25~+50 | CQC |
Mechanical Details
PA standard 1U rack is 44.45mm tall. If you use a common 38mm power supply, you have almost no room left for airflow or insulation. UES150-SPA4-OP is only 33mm (1.30″) tall. You get an extra 11mm of vertical space between the board and the chassis lid. This air buffer stops heat pockets and helps the unit pass safety creepage tests without extra plastic shields.
Dimensions
Weight
141.6 (L) x 50.8 (W) x 33.0 (H) mm
About 200g
Input Specifications
The unit runs on any AC voltage from 90V up to 264V. There are no manual switches to set. Standby power is capped at 0.3W. This helps manufacturers pass Energy Star or ErP “Green Power” audits for their finished machines. The 4.0A max input current ensures the supply initializes safely even when the industrial site grid is fluctuating.
Input Voltage Range
Input Current
Average Efficiency
Standby Power
90-264VAC
4.0A Max
Energy Efficiency Level VI
0.3W
Environmental & General
Telecommunications gear in outdoor cabinets faces extreme cold. Most ITE power supplies fail to boot below 0°C. This unit is rated for -25°C. It means your hardware will actually restart in winter after a power failure. It’s also rated for 5,000m altitude and has a 100,000-hour MTBF, which lowers the cost of site visits for remote industrial deployments.
Operating Temperature
Storage Temperature
Operating Humidity
Operating Altitude
MTBF
-25°C to 50°C
-40°C to 85°C
5% to 95% RH, non-condensing
5,000m
100,000 hours at full load at 25℃ ambient, calculated per
Telcordia_SR-332
Protection
Temporary grid surges or load faults shouldn’t kill the power permanently. This supply uses “Hiccup Mode” for short circuits. It trips and then tries to restart on its own every few seconds. Once the fault is cleared, the 12V power restores automatically. You don’t have to send a technician to a remote site just to flip a switch or reset the power.
Short Circuit
Over Current
Over Voltage
Trip and restart (hiccup mode)
Auto-recovery upon removal of fault
Built-in protection to prevent high-voltage output
Safety Approvals
Certified to GB4943.1 (CQC) for Information Technology Equipment. This is a pre-certified module. Integrating it into your design saves weeks of testing and cuts your certification costs. It ensures the hardware meets standard fire, shock, and insulation rules for professional networking and industrial markets.
GB4943.1
EMC
Industrial sites are electrically noisy. EMI can cause packet loss in fast data lines. This supply meets Class A emission rules to keep interference with nearby circuits low. The 6KV surge rating (IEC/EN 61000-4-5) stops lightning and grid switching spikes from killing the board. It is much more durable than the 1KV or 2KV bricks used in consumer electronics.
| Item | Standard | Level |
|---|---|---|
| EMI (Conduction/Radiation) | EN55032 / CISPR32 | Class A |
| Surge Immunity | IEC/EN 61000-4-5 | 6KV Ready |
| ESD Immunity | IEC/EN 61000-4-2 | 15KV Air / 8KV Contact |
Download File
Common Applications
Vertical clearance is the ultimate enemy when you’re integrating 150W of power into a professional chassis. Standard 1.75-inch (44.45mm) 1U racks are notoriously tight. Most 150W modules on the market are 38mm or taller, which basically chokes the airflow once the metal lid is screwed down. At 33mm tall, the UES150-SPA4-OP was built to fix this specific headache—providing a critical 11.45mm vertical gap. This isn’t just about “fitting”; it’s about creating a safe air buffer to keep components from cooking in high-density, enclosed environments. By integrating the power core directly onto the internal mounting plate, engineers can utilize the host’s chassis for thermal management while benefiting from a heavy 12.5A rail that can handle the specific startup loads of the following hardware:
Frequently Asked Questions
When choosing a 150W power supply, the wattage is usually the first thing people look at. It is not always the last thing that needs checking, though. Questions about power margin, start-up load, heat, efficiency, and installation space often come up once the power supply is being integrated into the actual equipment. Here are some of the questions worth checking before choosing a 12V 150W power supply for ITE equipment.
Is 150W enough for my equipment?
If your equipment needs 150W continuously, a 150W power supply is already at its rated limit, so that is not a good point to run at continuously.
For equipment with a lower normal load, there is more room. But do not look only at the number on the nameplate. A device that normally uses 120W, for example, may have a higher demand when it starts up or when the load changes.
The useful numbers to have are the normal load and the highest load. Once those are known, it becomes much easier to judge whether a 150W unit gives you enough room.
Do I really need extra power headroom with a 150W power supply?
Yes, especially if the equipment does not draw a steady amount of power.
There is no sensible “one percentage fits all” answer here. A system that sits at a stable 80W load is very different from one that normally runs at 120W and occasionally goes higher. Start-up current, load changes and the temperature inside the equipment also need to be taken into account.
For this reason, using a 150W supply for a system that is already right at 150W leaves little room for anything unexpected.
What if my equipment normally uses less than 150W but has a higher start-up load?
That is something to check before selecting the power supply.
The normal operating power may look fine on paper, while the short-term demand at start-up is higher. If that peak pushes the supply beyond what it can provide, the fact that the equipment normally consumes less than 150W does not solve the problem.
For a system with a known start-up or peak load, use that figure together with the normal operating load when selecting the power supply.
Can I use a 150W power supply for a 60W or 100W device?
Yes. A 150W rating is the maximum output capacity of the power supply. It does not mean the connected device will receive 150W all the time.
A 12V device that needs 60W draws the current it needs from the supply. The same applies to a 100W load. The important point is that the equipment’s required voltage and other input requirements match the power supply.
Why does a power supply get hot even when it is not running at full load?
Because the input power is not converted into output power with 100% efficiency. The part that is lost during conversion ends up as heat.
The UES150-SPA4-OP has a 90.0% average efficiency. At higher loads, that lost energy becomes more noticeable from a thermal-design point of view. This is one reason a power supply should not be selected by wattage alone, particularly when it will be installed inside a small enclosure.
Does higher efficiency really make a difference in a 150W power supply?
It can make a noticeable difference when the power supply operates for long periods or has limited room for heat dissipation.
For example, a power supply that converts more of its input power into useful output has less power left over as heat. With compact ITE equipment, that can make the thermal design easier.
The UES150-SPA4-OP has a 90.0% average efficiency and 0.3W standby power. These figures are worth looking at alongside the actual load and the way the power supply will be installed.
Is a 150W power supply too large for compact ITE equipment?
Not necessarily. The answer depends on how much space is available inside the equipment and how the power supply is installed.
The UES150-SPA4-OP measures 141.6 × 50.8 × 33.0 mm. When checking whether it will fit, leave room for more than the power supply itself. Cable routing, surrounding components and heat dissipation all take up space in a real enclosure.
A few millimeters can make a difference in a compact design, so it is worth checking the mechanical layout before the enclosure is finalized.
Can the same UES150-SPA4-OP be used with different AC input voltages?
Yes. The input range is 90–264VAC, so the same model covers common AC input voltages used in ITE equipment, including 115VAC and 230VAC applications.
This is useful when the same equipment is intended for different markets because a separate power supply version is not needed simply because the AC mains voltage changes within this range.
Related Models
Finding the right balance between power overhead and thermal waste is a primary hurdle in ITE integration. If the 150W output or the 33mm low-profile open-frame format of the UES150-SPA4-OP isn’t the exact fit for your current chassis—perhaps you need a heavier 409W rail for high-port networking hubs or a much smaller 12W footprint for edge sensors—browse these alternative ITE-certified modules. Each model in this series shares the same industrial-grade 6KV surge resilience and 1U compatibility to ensure consistent reliability across your entire hardware lineup.
Related Resources
Engineering 150W of power into a 1U chassis or an unventilated kiosk enclosure requires more than just a 12V output. These resources address the specific challenges of mid-wattage ITE integration—focusing on thermal headroom, the impact of 0.3W standby consumption on operational costs, and how to maintain signal integrity in electrically noisy industrial environments.
2025 Power Supply Selection Guide for Engineers (ITE)
A technical breakdown of the trade-offs between open frame and external adapters for 100W-200W designs. This guide focuses on “right-sizing” your power core to avoid thermal throttling, specifically covering how 33mm low-profile modules like the UES150 solve the clearance issues in slim industrial hardware.
What is an ITE Power Supply Used For?
This article looks at the hardware reality of 12V-native systems. It explains why EN62368-1 certified modules are the required standard for hardware like NVR storage hubs, industrial IPC mainboards, and interactive terminals, detailing the surge and EMI requirements needed for field reliability in non-climate-controlled sites.
Energy Efficiency Rating of ITE Power Adapters
Beyond the headline efficiency percentage, this post analyzes why no-load standby power is critical for large-scale deployments. It explains how the ≤0.3W idle draw of the UES150 series helps finished products pass Energy Star audits and reduces the cumulative heat buildup in multi-device 19-inch rack installations.
Request Technical Support & Pricing
Our engineering team provides dedicated technical assistance for our entire I.T.E. and industrial power supply portfolio. Whether you are navigating IEC/EN 62368-1 safety compliance, require custom DC output tuning, or need mechanical integration advice for high-density enclosures, we ensure your project specifications are met with technical precision.
✔ IEC/EN 62368-1 & Global ITE Safety Compliance
✔ Custom DC Connectors, Cables & Voltage Tuning
✔ Engineering Samples Available for System Evaluation
✔ Direct Technical Response from Engineers within 24h