The Gutor Electronics 0500129, also identified as the PCA PSU AUX (SILCON 21108-2), is a high-reliability auxiliary power supply board specifically designed for integration within industrial Uninterruptible Power Supply (UPS) systems and power conversion cabinets.
Product Parameters (Datasheet)
- Model Number: 0500129
- PCA Board ID: SILCON 21108-2
- Component Type: PCA PSU AUX (Auxiliary Power Supply Board)
- Input Voltage Range: Variable based on system DC bus or AC input configuration
- Output Voltages: Multi-rail auxiliary outputs for internal control logic and gate drive power
- Compatibility: Gutor PXP, PEW, and specialized SILCON UPS series
- Protection Features: Overvoltage protection, short-circuit current limiting, and thermal monitoring
- Mounting Type: Internal PCB mounting with standardized standoff positions
- Connection Type: Multi-pin header connectors for system integration

Country of Origin
This technical component is engineered by Gutor Electronics (Schneider Electric), with primary manufacturing and design origin in Switzerland.
Application Fields
The 0500129 PCA is utilized in critical infrastructure power systems, including:
- Oil & Gas: Powering control circuits in offshore platforms and refineries.
- Nuclear Power: Redundant auxiliary power for safety-critical monitoring systems.
- Chemical Plants: Maintaining control logic for hazardous process automation.
- Power Generation: Serving as a vital sub-component in large-scale industrial UPS units.
Product Usage Instructions
- Safety First: Ensure all AC and DC power sources are completely isolated and locked out before attempting installation or replacement.
- ESD Protection: Use an anti-static wrist strap when handling the 0500129 board to prevent damage to sensitive CMOS components.
- Mounting: Secure the board onto the internal chassis standoffs, ensuring no contact with the metal frame.
- Wiring: Carefully reconnect the ribbon cables and power headers according to the original Gutor system wiring diagram.
- Testing: Upon power-up, verify the diagnostic LEDs on the board (if present) to ensure all auxiliary voltage rails are within tolerance.
Product Technical Description
The SILCON 21108-2 is an auxiliary switching mode power supply (SMPS) board. It is responsible for converting the primary system voltage into stabilized, low-voltage DC rails required by the UPS control microprocessors, communication modules, and cooling fan assemblies. Its design focuses on high MTBF (Mean Time Between Failures) to ensure that the “brains” of the UPS remain operational even during heavy electrical transients.
Q&A (Common Questions)
Q: Can this board be repaired at the component level? A: While possible for expert technicians, Gutor recommends replacing the entire 0500129 assembly to ensure the certified reliability and safety standards of the UPS system are maintained.
Q: Is the SILCON 21108-2 compatible with all Gutor UPS models? A: No, it is specifically designed for the SILCON and certain PEW/PXP series. Always verify the part number against your system’s technical manual.
Q: What are the symptoms of a failing PCA PSU AUX? A: Common symptoms include intermittent control panel blackouts, communication errors, or “Auxiliary Power Failure” alarms on the main UPS display.
Q: Does the board require firmware programming? A: This specific part is a hardware voltage supply board and typically does not require independent firmware flashing; it provides the power necessary for other logic boards to function.
Similar Model Recommendations
- Gutor 0500130 (Primary Power Supply variant)
- Gutor 0574108 (Control Logic PCA)
- Gutor 21108-1 (Earlier revision of the PSU AUX)
- Gutor PCA-8001 (Auxiliary Monitoring Board)
- Gutor 0500551 (Gate Driver Interface Board)
For more information on the Gutor Electronics 0500129 and other industrial power components, please contact our technical sales team.
