UE20-SPA-OP | 9V–15V 20W Medical Open Frame Power Supply

UE20-SPA-OP

An internal AC-DC supply for medical equipment, with three fixed-output versions to match different circuit requirements.

Compact format for space-constrained medical equipment
PCB pin connections for board-level integration
Medical isolation with low touch leakage current
Low standby consumption for mains-connected equipment
Operation at altitudes up to 5,000m

Models & Ratings

Choose the output voltage your circuit requires. The 9V version delivers 15.03W; the 12V and 15V versions deliver approximately 20W. Each module has one fixed output.

Model Number	Power(W)	Input Voltage Range(VAC)	Output Voltage(VDC)	Output Current(A)	Operating Temperature Range(°C)	Safety Standards
UE20-XXXYYYSPA-OP	15.03	90–264	9	1.67	−10 to +70*	IEC 60601-1, EN 60601-1
UE20-XXXYYYSPA-OP	20.04	90–264	12	1.67	−10 to +70*	IEC 60601-1, EN 60601-1
UE20-XXXYYYSPA-OP	20.01	90–264	15	1.34	−10 to +70*	IEC 60601-1, EN 60601-1

Derating applies above 50°C. See Environmental & General.

Mechanical Details

Check the pin layout before you finish the PCB. The AC pins are on one side of the UE20-SPA-OP, with the positive and negative output pins on the other. Their positions and spacing are shown below.

The board is 65 × 35mm and the tallest component reaches 24mm. That height is measured above the module’s PCB; leave room underneath for the pins and solder joints when checking the fit inside your equipment.

Input Specifications

The 90–264VAC input covers common nominal 100–240VAC mains supplies without a manual voltage selector. The module connects to the AC input through its L and N pins.

When selecting the equipment’s input switch and fuse, account for the brief cold-start inrush as well as the normal operating current.

Input Characteristic	Specification
Input voltage range	90–264VAC
Frequency range	47–63Hz
Input current	0.5A at 100VAC
Inrush current	60A maximum at 240VAC, cold start
Standby power	≤0.3W

Environmental & General

Check the temperature beside the module with the equipment closed and running. Nearby components can heat this space even when the room temperature is moderate.

The derating curve allows full rated load through 50°C, 90% load at 60°C and 80% at 70°C. Use the local operating temperature when deciding how much output your equipment can draw.

Characteristic	Specification
Operating temperature	−10°C to +70°C
Derating range	+50°C to +70°C
Storage temperature	−20°C to +70°C
Operating humidity	10–90% RH, non-condensing
Storage humidity	5–90% RH
Operating altitude	Up to 5,000m
Weight	54g
Energy efficiency	Level V
Average efficiency — 9V	79.16%
Average efficiency — 12V	80.97%
Average efficiency — 15V	80.98%
MTBF	>100,000 hours, Telcordia SR-332 at 25°C

Protection

A short circuit, an overloaded output and an overvoltage fault do not recover in the same way on the UE20-SPA-OP. The table below shows what to expect after each protection operates.

Protection Function	Specification	Recovery
Overload	105–210% of rated output power	Automatic recovery
Overvoltage	105–250% of rated output voltage	Input power reset required
Short circuit	Trip and restart, hiccup mode	Repeated restart attempts while the fault remains

If the equipment repeatedly starts and stops, check the load before continuing the test. The overload threshold is a protection setting, not extra power available for normal operation.

Safety Approvals

Which medical approvals does your project require? For the UE20-SPA-OP, the catalog lists CB to IEC 60601-1 and TÜV Mark to EN 60601-1.

If your lab needs the supporting documents, let us know the output version you plan to use. We can check the relevant certificate and report with you before you settle on the module for your equipment.

IEC60601-1

View Certificate

TÜV

EN60601-1

View Certificate

EMC

The power module, receiving PCB and wiring become one installation inside your equipment. Evaluate EMC with the intended board position, AC routing and output connections in place, particularly where measurement circuits sit nearby.

Item	Medical Specification
Conducted emissions	IEC/EN 60601-1-2, CISPR 11
Radiated emissions	IEC/EN 60601-1-2, CISPR 11
Harmonic currents	EN 61000-3-2, Class A
Voltage flicker	EN 61000-3-3
Immunity	IEC/EN 60601-1-2

Immunity Test	Standard	Test Level
ESD	IEC 61000-4-2	±15kV air, ±8kV contact
Radiated immunity	IEC 61000-4-3	10V/m, 3V/m; 80MHz–2.7GHz
EFT/Burst	IEC 61000-4-4	±2kV AC port, ±1kV signal ports
Surge	IEC 61000-4-5	±1kV line-to-line
Conducted immunity	IEC 61000-4-6	3Vrms, 6Vrms; 0.15–80MHz
Magnetic field	IEC 61000-4-8	30A/m
Dips and interruptions	IEC 61000-4-11	0%, 70%, 0% of UT

Refer to the applicable report for the test configuration, durations and conditions.

Common Applications

The UE20-SPA-OP can be considered for the medical equipment below where the selected output meets the load requirement and the equipment provides space for an internal AC power assembly.

Frequently Asked Questions

We need a small internal medical supply. Is this model worth trying?

If your circuit needs 9V, 12V or 15V, it is worth checking the UE20-SPA-OP against your layout. The next question is the load. Include everything the supply will power, even accessories that are only used occasionally.

For the first enquiry, your power requirement and a drawing of the available space are enough to start. Tell us the medical approvals you need as well, so we don’t get as far as sampling with an unsuitable configuration.

Our old supply is rated at 12V 2A. Can we use this one?

We wouldn’t recommend it as a direct replacement from that label alone. This model’s 12V output is rated at 1.67A.

Your equipment might draw less than the old adapter’s capacity, but that needs establishing from the equipment specification or testing. If it really needs 2A, we should select a larger supply rather than try to run this one beyond its rating.

Does the board size tell us how much installation space we need?

Only part of it. The drawing gives you the outline, component height and pin positions. Your assembly also needs room below the board and separation from nearby parts.

This matters when replacing a module in an existing enclosure. A supply can fit into the opening and still be unsuitable for the mounting arrangement. If your enclosure is already made, include the mounting details with the enquiry. We need to compare the installed position, not just the board outline.

Can we test the samples for several weeks before deciding?

Yes. Your team needs time to check the supply with the equipment, including long periods of operation.

Does anything change as the test goes on? Note any unexpected shutdowns, rising temperatures or changes in the equipment’s performance. If a sample develops a fault, keep it and the test records. We’ll need to find out what happened before discussing the production order.

Our PCB needs different pin positions. Is that possible?

We’d have to look at the drawing before saying yes. Which pins need moving, and by how much?

If the PCB is still in the design phase, please provide the proposed footprint. If the PCB design is already complete, please let us know whether modifications to the board are possible. This will help us determine whether to evaluate localized adjustments to the module or to pursue a redesign.

What do you need for a quotation?

How many units, and what output voltage and current? Which medical approvals do you need?

Please include any requirements for the pins, wiring and connectors. If you want your own logo or label, mention that too; the artwork can follow later. For a replacement, the old supply’s part number and drawing are useful, particularly if the new one has to fit the same PCB.

Related Models

Still choosing a power supply for your medical equipment? The models below give you other options if the UE20-SPA-OP does not fit your board layout or leave enough capacity for the load.

Compare the output ratings and mechanical drawings alongside your equipment design. A higher wattage may give you more capacity, but it can also mean a larger footprint or different connections. If you’re replacing an existing module, check the pin layout before ordering a sample.

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Related Resources

Before your PCB and enclosure designs are released, there are a few installation decisions worth reviewing. These articles cover mounting, temperature-related output limits and patient-protection isolation.

What Does 2 x MOPP Mean for a Medical Power Supply?

Understand the isolation term before comparing approval documents. This introduction provides background for discussing patient protection with your certification engineer.

How to Install Open Frame AC-DC Power Supplies

Review the mounting and wiring questions that need resolving around an exposed power assembly. Use this as a discussion guide for your mechanical and hardware teams, then follow the selected module’s installation requirements.

Power Supply Derating: How to Calculate Output Limits for Temperature, Altitude, and Cooling

Working close to the supply’s rated output? This article explains how installation conditions affect the power available, helping you decide whether the design needs more output margin or a different cooling arrangement.

Request Technical Support & Pricing

Our engineering team provides comprehensive support for this power supply series. Whether you need standard models, custom DC output specifications, or specific medical compliance assistance, we ensure your requirements are met with precision and speed.

✔ 2 MOPP & IEC 60601-1 Certification Support

✔ Custom DC Connectors & Cable Options

✔ Free Engineering Samples for Evaluation

✔ Detailed Technical Response within 24h

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