Key Takeaways
- The FSP500-50FDB is a compact 500 W switching power supply with an active PFC circuit and a full-range 90–264 Vac input, designed for industrial PCs, 1U servers, communication systems, and automation platforms.
- It achieves an 80 PLUS Gold efficiency level, with typical efficiency values of 87 % / 90 % / 87 % at 20 %, 50 %, and 100 % load, contributing to reduced heat generation and improved thermal management.
- The PSU provides multiple DC output rails (+3.3 V, +5 V, +12 V, −12 V, and +5 Vsb) with tight regulation, low ripple and noise, and integrated protection features to help safeguard connected equipment.
- A monitored power-good signal, internal 40 mm fan cooling, and an operating temperature range from 0 °C to +50 °C support continuous operation in dense 1U chassis.
- With a specified MTBF of 100,000 hours and EMI performance compliant with FCC and CISPR 22 Class B limits, the FSP500-50FDB is suitable for globally deployed industrial and server systems.
The FSP500-50FDB is an industrial-grade AC-line power supply that delivers 500 W of continuous output power in a compact 1U form factor. It is designed for server, communication, and automation applications where efficiency, protection features, and EMC performance are important design considerations.
Compact industrial PC power supply for 1U chassis
On the TPS Elektronik shop, the FSP500-50FDB is positioned as a 500 W ATX / IPC power supply designed for integration into standard 1U server chassis and compact enclosures. It is intended for server, communication, and automation applications that require high power density and reliable electrical performance. The unit is supplied with relevant safety documentation and mechanical drawings to support system integration.
Its rugged steel enclosure and front-to-rear airflow design make the power supply suitable for dense rack environments and small industrial cabinets where space and cooling capacity may be limited.
Electrical performance and efficiency
The FSP500-50FDB is an AC-line powered PSU equipped with an active power factor correction (PFC) circuit designed to meet EN 61000-3-2 harmonic current limits. It accepts a wide input voltage range of 90–264 Vac at 47–63 Hz, allowing a single model to be used across different regions without manual input selection.
According to the datasheet, efficiency measurements show approximately 87 % efficiency at full load, 90 % at half load, and 87 % at 20 % load for both 115 Vac and 230 Vac operation, corresponding to an 80 PLUS Gold efficiency level. Higher efficiency helps reduce thermal losses, supports compact system design, and can contribute to lower energy consumption in continuously operating systems.
Multi-output rails with low ripple and protection features
The FSP500-50FDB provides multiple DC output rails, including +3.3 V, +5 V, +12 V, −12 V, and +5 Vsb. The main outputs are rated up to 14 A on +3.3 V, 16 A on +5 V, and 41 A on +12 V, with a combined +3.3 V and +5 V power limit of 90 W and a total output power of 500 W.
Ripple and noise are specified at up to 50 mVpp on the +3.3 V, +5 V, and +5 Vsb rails, and up to 120 mVpp on the +12 V and −12 V rails, supporting stable operation of sensitive electronic components.
Integrated protection functions include over-voltage protection on the main rails, short-circuit protection on all outputs, and over-power protection. In the event of an overload exceeding approximately 150 % of the rated power, the PSU latches off and can be restarted after the fault is cleared and the AC input is recycled.
The integrated power-good (P.G.) signal is a TTL-compatible output that asserts once all main output voltages are within specification. Typical power-good timing is 100–500 ms, with a minimum warning time of 1 ms before loss of regulation, supporting controlled system start-up and shutdown behavior.
Cooling, temperature range, and reliability
Thermal management is provided by an internal 40 mm, 12 V fan that draws air through the perforated front panel and across internal heat-dissipating components. The specified operating temperature range is 0 °C to +50 °C, with a storage temperature range from −40 °C to +80 °C. Humidity ratings extend up to 85–95 % non-condensing, and the unit is designed to meet vibration and shock requirements typical for industrial environments.
Reliability calculations based on MIL-HDBK-217 indicate a mean time between failures (MTBF) of 100,000 hours at 25 °C, full load, and nominal input conditions, supporting long-term operation in 24/7 server and automation systems.
EMI, safety, and global compliance
The FSP500-50FDB is designed to meet common EMI and safety requirements for international deployment. Datasheet information indicates compliance with FCC Part 15 and CISPR 22 Class B limits at both 115 Vac and 230 Vac input conditions. The power supply also meets dielectric strength requirements of 1800 Vac between primary and secondary circuits or chassis and complies with specified leakage current limits at 264 Vac, supporting use in industrial and professional installations.
Typical applications
- 1U rack-mount servers and storage systems requiring a compact, high-efficiency 500 W switching power supply
- Industrial PCs and edge gateways installed in space-constrained cabinets or wall-mounted enclosures
- Communication and networking equipment that benefits from low ripple and noise output
- Automation controllers, PLCs, and motion control systems designed for continuous operation and controlled power-up sequencing
Conclusion
The FSP500-50FDB combines a compact 1U form factor, active PFC, and an 80 PLUS Gold efficiency level with a comprehensive set of electrical protections and global EMI compliance. With its wide input voltage range, multiple regulated output rails, and design focused on continuous operation, this 500 W switching power supply is well suited for engineers developing industrial PCs, communication equipment, and automation systems that require reliable power delivery in demanding environments.
