FSP500M-80PA – 500W Medical 1U ATX Power Supplies
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The FSP500M-80PA is a 500 W AC/DC switching power supply housed in a compact 1U ATX enclosure. It is intended for integration into medical electrical equipment and other systems requiring a multi-output ATX power architecture. The design addresses IEC 60601-1 and IEC 62368-1 requirements and incorporates BF class insulation. Input-to-output isolation is rated at 4,000 VAC with two means of patient protection. Dedicated DC/DC conversion is used for the +3.3 V and +5 V rails to improve load regulation. The power supply accepts a 90–264 VAC input and provides +3.3 V, +5 V, three +12 V rails, −12 V and +5 V standby outputs, with an optional −5 V output available by request. Its 5,000 m operating-altitude rating, protection functions and integrated cable set support installation in low-profile equipment where electrical isolation, thermal management and connector compatibility must be considered together.
The FSP500M-80PA is designed for medical and other safety-critical systems that require a compact 1U ATX power platform with multiple regulated outputs. It combines 500 W continuous output, BF class insulation, 2 MOPP input-to-output isolation, and a 90–264 VAC universal input range in a low-profile format.
With dedicated DC/DC conversion for the +3.3 V and +5 V rails, three +12 V outputs, integrated protection functions, and support for operation up to 5,000 m altitude, it is suited to system designs where electrical safety, thermal performance, and connector compatibility must be balanced carefully.
Range features
A high level overview of what this range offers
- 500 W continuous output – Supplies multi-rail power for 1U ATX system architectures.
- 220 × 100 × 40.5 mm enclosure – Supports integration into low-profile equipment.
- 90–264 VAC input range – Covers common 115 VAC and 230 VAC supply systems.
- IEC 60601-1 and IEC 62368-1 design basis – Supports medical and IT equipment compliance work.
- BF class insulation and 2 MOPP isolation – Supports patient-related electrical safety requirements.
- 80 PLUS Gold efficiency rating – Can help limit conversion losses and internal heat generation.
- DC/DC conversion on +3.3 V and +5 V – Improves regulation of the lower-voltage output rails.
- Three +12 V rails – Distributes power across processor, expansion and system loads.
- 5,000 m operating-altitude rating – Supports use at elevated installation sites within stated operating conditions.
- OVP, OCP, short-circuit and overtemperature protection – Provides controlled protection against specified electrical and thermal faults.
- ATX power and peripheral cable set – Includes motherboard, CPU, PCIe, SATA, PATA and floppy connections.
Downloads
for FSP500M-80PA - 500W Medical 1U ATX Power Supplies
What’s in this range?
All the variants in the range and a comparison of what they offer
| Specification | FSP500M-80PA |
|---|---|
Power conversion | AC/DC switching power supply |
Form factor | 1U ATX |
Continuous output power | 500 W |
Input voltage | 90–264 VAC |
Input frequency | 47–63 Hz |
Input current at 115 VAC, 60 Hz | 6 A RMS |
Input current at 230 VAC, 50 Hz | 3 A RMS |
Earth leakage current | 300 µA maximum at 264 VAC, 63 Hz |
Power factor | 0.9 minimum |
Efficiency | 80 PLUS Gold; 87%, 90%, 87% |
Hold-up time at 115 VAC | 12 ms minimum |
Hold-up time at 230 VAC | 17 ms minimum |
Line regulation | ±1% maximum at full load |
Inrush current at 115 VAC | 50 A at 25°C cold start |
Inrush current at 230 VAC | 100 A at 25°C cold start |
Input-to-output withstand voltage | 4,000 VAC, 2 MOPP |
Input-to-ground withstand voltage | 1,500 VAC, 1 MOPP |
Output-to-ground withstand voltage | 1,500 VAC |
Insulation classification | BF class |
MTBF | 100,000 hours at full load and 25°C ambient, calculated using MIL-HDBK-217 |
Operating temperature | 0°C to +50°C |
Storage temperature | −20°C to +80°C |
Relative humidity | 10% to 95%, non-condensing |
Output derating | Linear reduction from 100% at +50°C to 50% at +70°C |
Maximum operating altitude | 5,000 m |
Dimensions | 220 ±0.5 × 100 ±0.5 × 40.5 ±0.5 mm |
Weight | 1.57 kg |
Design standards | IEC 60601-1 and IEC 62368-1 |
Safety marks | cURus E211696, EN/IEC 60601-1 certification mark and CE |
| Function | Specification |
|---|---|
Overvoltage protection | +3.3 V, +5 V and +12 V; latch-off response |
Overcurrent and short-circuit protection | +3.3 V, +5 V, +12 V, −12 V and optional −5 V; latch-off response |
+5 V standby fault response | Automatic recovery |
Overtemperature protection | Latch-off response |
Output rise time, T1 | Less than 20 ms |
Power-good delay, T2 | 100–500 ms |
Power-fail delay, T3 | Greater than 1 ms |
| Output | FSP500M-80PA | Load regulation | Ripple and noise |
|---|---|---|---|
+3.3 V | 0–20 A | ±5% | 50 mV P-P |
+5 V | 0–20 A | ±5% | 50 mV P-P |
+12 V1 | 0–16 A | ±5% | 120 mV P-P |
+12 V2 | 0–16 A | ±5% | 120 mV P-P |
+12 V3 | 0.1–16 A | ±5% | 120 mV P-P |
−5 V, optional | 0–0.2 A | ±10% | 100 mV P-P |
−12 V | 0–0.5 A | ±10% | 120 mV P-P |
+5 V standby | 0–3 A | ±5% | 50 mV P-P |
Combined +3.3 V and +5 V output | 120 W maximum | — | — |
Combined +12 V capacity | 41 A maximum | — | — |
Total output power | 500 W | — | — |
| Standard | Performance |
|---|---|
IEC 60601-1-2 | Medical EMC framework |
EN 55011 | Class B conducted and Class B radiated emissions |
EN 61000-3-2 | Harmonic distortion, Class D |
EN 61000-3-3 | Line flicker |
EN 61000-4-2 | ESD immunity: ±15 kV air and ±8 kV contact |
EN 61000-4-3 | Radiated immunity: 9–28 V/m |
EN 61000-4-4 | Fast transient and burst immunity: ±2 kV |
EN 61000-4-5 | Surge immunity: ±1 kV differential and ±2 kV common mode |
EN 61000-4-6 | Conducted immunity: 3–6 V RMS |
EN 61000-4-8 | Magnetic-field immunity: 30 A/m |
EN 61000-4-11 | Voltage-dip immunity: 30% reduction for 500 ms and greater than 100% reduction for 10 ms |
| Reference | Connection | Cable length | Quantity | Equivalent connector part number(s) |
|---|---|---|---|---|
P1 | Motherboard, 24-pin | 500 mm | 1 | 39-01-2240 |
P2 | CPU, 8-pin | 500 mm | 2 | 39-01-2080 |
P3 | PCIe, 6+2-pin | 500 mm | 1 | P8-I42002K21B-B |
PD, PE, PF, PG | SATA | 500 + 150 mm | 2 + 2 | SD-67926-0011 + SD-67582-0011 |
PA, PB, PC | PATA and floppy | 500 + 150 + 150 mm | 1 + 1 + 1 | 1-480424-0 + 171822-4 |
FAQs
for FSP500M-80PA – 500W Medical 1U ATX Power Supplies
The power supply operates from 90–264 VAC at 47–63 Hz. Its rated input current is 6 A RMS at 115 VAC and 3 A RMS at 230 VAC.
The standard configuration provides +3.3 V, +5 V, three +12 V rails, −12 V and +5 V standby. A −5 V output can be supplied as an optional configuration rather than as part of the standard model.
Each +12 V rail is rated for up to 16 A continuously, while the three rails have a combined maximum capacity of 41 A. Each rail can also provide an 18 A peak current for at least 10 ms.
The +3.3 V and +5 V outputs may each deliver up to 20 A, subject to a combined output-power limit of 120 W.
The design uses BF class insulation and provides 4,000 VAC input-to-output isolation, rated as 2 MOPP. Input-to-ground isolation is rated at 1,500 VAC with 1 MOPP.
The power supply meets the 80 PLUS Gold efficiency level, with efficiency figures of 87%, 90% and 87% across the stated rating sequence. The minimum specified power factor is 0.9.
Full rated output is specified at +50°C. The available output should then be reduced linearly to 50% at +70°C, with final system operation confirmed through enclosure-level airflow and temperature testing.
The main rails include overvoltage, overcurrent and short-circuit protection with latch-off behaviour. Overtemperature protection also latches the unit off, while a +5 V standby fault uses automatic recovery.
The cable set includes a 24-pin motherboard connector, two 8-pin CPU connections, one 6+2-pin PCIe connection, four SATA connections and a combined PATA and floppy cable assembly.
Operation is rated at altitudes up to 5,000 m. Cooling, load derating, equipment insulation and the complete system environment should still be validated for the intended installation.
