GE QPJ-SBR-201

GE QPJ-SBR-201 is a solid-state circuit breaker module with high reliability and high precision, which belongs to the series of dedicated components designed by General Electric (GE) for critical power distribution and control systems. In electrical systems, this product acts as an “intelligent guardian”—it goes beyond the functions of traditional thermal-magnetic circuit breakers and integrates advanced solid-state switching technology, precise current sensing, and microprocessor control. The core function of GE QPJ-SBR-201 is to monitor line current; when fault conditions such as overload or short circuit are detected, it achieves millisecond-level circuit breaking at a microsecond-level speed (far faster than mechanical circuit breakers), thereby providing the highest level of protection for downstream precision equipment. Its core value lies in arc-free breaking, extremely long mechanical life, adjustable tripping characteristics, and excellent reliability. It is highly suitable for protecting sensitive electronic loads, scenarios requiring frequent switching, and mission-critical applications with extremely high requirements for power supply continuity, effectively preventing equipment damage and production interruptions caused by electrical faults.

Product Parameters

• Product Model: QPJ-SBR-201
• Manufacturer: General Electric (GE)
• Product Type: Solid-State Circuit Breaker Module
• Rated Operating Voltage: 480 VAC (or defined by model, e.g., 250 VAC)
• Rated Continuous Current: 20 A (or defined by model; “201” may represent 20 A)
• Breaking Capacity: Up to 100 kA (depends on the cooperation of external fuses)
• Tripping Characteristics: Programmable/Adjustable (usually supports instantaneous, short-time delay, and long-time delay)
• Control Power Supply: 24 VDC / 24 VAC (typical value)
• Operation Mode: Electronic, supporting remote control for opening/closing
• Status Indication: Built-in LED status indicators (power, trip, closed)
• Response Time: < 1 ms (for short-circuit faults)
• Communication Interface: May support hard-wired alarm signal output (auxiliary contacts)
• Installation Method: DIN rail mounting or panel mounting
• Operating Temperature: -40°C to +70°C

Structure and Composition

1. Solid-State Switching Device: Such as high-power Silicon Controlled Rectifiers (SCR) or Insulated Gate Bipolar Transistors (IGBT). As the core for contactless on-off operations, it achieves extremely high switching speed and long service life.
2. Precision Current Sensor: Monitors the load current in real time and transmits signals to the control unit.
3. Microprocessor Control Unit: The “brain” of the module, which continuously analyzes current signals, executes programmable protection algorithms (e.g., I²t characteristics), and issues breaking commands when faults occur.
4. Gate Drive Circuit: Receives commands from the control unit and drives the on-off of solid-state switching devices.
5. Control Power Conversion Circuit: Provides the required working power for internal electronic circuits.