The Gutor Electronics 0400186 (SILCON 1-843) is a specialized Inverter Control and Static Switch (CU-SSW) Printed Circuit Assembly designed for high-power 3-Phase Uninterruptible Power Supply (UPS) systems, providing critical logic for seamless power transitions and inverter management.
Product Parameters (Datasheet)
- Model Number: 0400186
- PCA Board ID: SILCON 1-843
- System Application: 3-Phase Industrial UPS
- Module Type: CU-SSW (Control Unit – Static Switch) / Inverter Logic
- Operating Voltage: Logic levels derived from internal system power supplies
- Functionality: Inverter PWM control, synchronization logic, and static bypass switching
- Interface: Multi-pin ribbon connectors for gate drivers and system bus communication
- Monitoring: Real-time sensing for phase synchronization, overcurrent, and voltage regulation
- Compatibility: Gutor PXP, PEW, and legacy Silcon series UPS units

Country of Origin
This precision control module is designed and engineered by Gutor Electronics (Schneider Electric) in Switzerland, ensuring compliance with strict European industrial power standards.
Application Fields
The 0400186 board is a core component found in mission-critical power protection systems within:
- Nuclear Power Plants: Managing emergency power for reactor cooling and monitoring systems.
- Oil & Gas Infrastructure: Ensuring continuous operation of control rooms on offshore platforms.
- Data Centers: Controlling the static transfer switch for zero-millisecond power transitions.
- Chemical Processing: Protecting automated batch controllers from voltage sags and outages.
- Heavy Manufacturing: Synchronizing inverter output for large-scale industrial motor drives.
Product Usage Instructions
- System Isolation: Before installation or removal, the UPS must be transferred to manual bypass and all DC/AC breakers must be locked out to prevent high-voltage exposure.
- ESD Protection: Handle the board only in a static-safe environment using a grounded wrist strap to protect the sensitive microcontrollers.
- Mounting: Secure the board into the designated internal chassis standoffs, ensuring all nylon or metal spacers are correctly positioned.
- Cabling: Carefully connect the gate driver cables and the sensing loom. Ensure the “SSW” (Static Switch) control leads are securely seated to prevent accidental bypass opening.
- Commissioning: Following replacement, the UPS firmware may require a “Self-Test” or calibration sequence via the Gutor service terminal to synchronize the inverter phase with the bypass utility.
Product Technical Description
The SILCON 1-843 board acts as the “nerve center” for the inverter stage of a 3-phase UPS. It is responsible for generating the high-frequency Pulse Width Modulation (PWM) signals that drive the IGBT power modules. Additionally, it monitors the utility grid to ensure the inverter is perfectly synchronized in phase and frequency. This synchronization is what allows the “Static Switch” (SSW) to transfer the load between the inverter and the bypass source in less than 4 milliseconds without interrupting the power to sensitive industrial equipment. The board features hardware-level interlocking to prevent the inverter and bypass from being connected out-of-phase, which would cause catastrophic equipment failure.
Q&A (Common Questions)
Q: Does the 0400186 require software configuration upon replacement? A: While it is a hardware board, it often requires site-specific parameters (voltage setpoints/frequency) to be verified through the main UPS control interface after installation.
Q: What is the significance of the “CU-SSW” designation? A: It stands for Control Unit – Static Switch. This board manages both the creation of the AC waveform (Inverter) and the logic for the electronic bypass (Static Switch).
Q: Can this board be used in a single-phase Gutor UPS? A: No, the SILCON 1-843 is specifically architected for the 3-phase synchronization required by larger PXP and PEW industrial units.
Q: What are the indicators of a faulty inverter control board? A: Common indicators include “Inverter Desynchronized” alarms, failure to transfer to bypass, or inconsistent output voltage on one or more phases.
Similar Model Recommendations
- Gutor 0400185 (Complementary Logic Board)
- Gutor 0500129 (Auxiliary PSU Board)
- Gutor 21108-2 (System Power Supply PCA)
- Gutor 0574108 (Main Processor Module)
- Gutor SILCON 1-842 (Earlier revision/variant)
For technical datasheets or to purchase the Gutor Electronics 0400186, please visit our online industrial spare parts gallery.
