Ebyte BAD11 & BAD31 series 12W Isolated DIN-Rail Power Supplies 85-264VAC

This specification table compares 5 models of Ebyte DIN-rail mounted industrial isolated AC-DC power supplies, featuring 85-264VAC wide input, 2750VDC galvanic isolation, 87.3% peak efficiency and comprehensive circuit protection, engineered for reliable operation in harsh industrial environments. Product Model Input Voltage (Nominal & Range) Rated Power Output Voltage (VDC) Output Accuracy Max Output Current Isolation Voltage Max Conversion Efficiency Operating Temperature Protection Features BAD11-12W05N2 220VAC (85-264VAC) 12W 5V DC ±5% 2400mA 2750VDC 87.3% -40℃ ~ +85℃ Input: surge & lightning protection; Output: over-current, short-circuit, over-voltage protection BAD11-12W12N2 220VAC (85-264VAC) 12W 12V DC ±5% 1000mA 2750VDC 87.3% -40℃ ~ +85℃ Input: surge & lightning protection; Output: over-current, short-circuit, over-voltage protection BAD31-12W05N2 380VAC (85-450VAC) / 120-630VDC 12W 5V DC ±1% 2400mA 2750VDC 87.3% -40℃ ~ +85℃ Input: surge & lightning protection; Output: over-current, short-circuit, over-voltage protection BAD31-12W12N2 380VAC (85-450VAC) / 120-630VDC 12W 12V DC ±1% 1000mA 2750VDC 87.3% -40℃ ~ +85℃ Input: surge & lightning protection; Output: over-current, short-circuit, over-voltage protection BAD31-12W24N2 380VAC (85-450VAC) / 120-630VDC 12W 24V DC ±1% 500mA 2750VDC 87.3% -40℃ ~ +85℃ Input: surge & lightning protection; Output: over-current, short-circuit, over-voltage protection Download Datasheet Application Scenarios Factory Automation Control Systems The -40℃ to +85℃ wide operating temperature range and 2750VDC galvanic isolation ensure stable power delivery for PLC modules, distributed IO terminals and field sensors in harsh workshop environments. The built-in surge and lightning input protection effectively suppresses transient voltage spikes from the industrial power grid, reducing equipment failure rates caused by power anomalies. Rail Transit On-board Monitoring Equipment The 85-264VAC ultra-wide input voltage adapts to the large fluctuation range of vehicle-mounted power grids in rail transit systems. The output over-current and short-circuit protection mechanism automatically cuts off output in case of line faults, avoiding cascading damage to monitoring cameras and communication gateways in high-vibration, high-electromagnetic-interference carriage environments. Smart Street Light Control Systems With a peak conversion efficiency of 87.3%, the power supply minimizes heat generation during 24/7 outdoor operation, extending the service life of internal components. The standard DIN-rail mounting design is compatible with existing street lamp control cabinets, enabling fast on-site retrofitting without additional structural modification. Industrial Precision Instrumentation The 2750VDC isolation barrier eliminates ground loop interference between the AC power grid and low-voltage measurement circuits, providing clean and stable DC power for precision meters, data acquisition units and analytical instruments. This ensures accurate data sampling in industrial sites with complex common-mode noise. Technical FAQ Q: What is the rated output current of the BAD31-12W24N2 model, and how does it perform under low input voltage? A: The BAD31-12W24N2 provides a rated output current of 0.5A at 24V DC under nominal 220VAC input. When the input voltage drops to 85VAC, the maximum output power derates by approximately 10% due to the reduction of bus voltage on the primary side, and the output current is limited to 0.45A to maintain stable operation of the switching regulator. Q: What is the specific role of the 2750VDC isolation voltage in industrial field applications? A: The 2750VDC dielectric strength is tested between the AC input terminal and DC output terminal for 1 minute without breakdown. It can withstand common-mode surge interference up to 2000V peak in industrial power distribution systems, effectively blocking ground potential differences between field equipment and central control rooms, and eliminating common-mode noise coupled on signal lines. Q: How does the output over-voltage protection work, and what is the trigger threshold? A: The output over-voltage protection adopts a zener diode sampling + primary PWM latching mechanism. For 5V output models, the protection triggers at 6.2-6.8V; for 12V models, it triggers at 14.5-15.5V; for 24V models, it triggers at 28.5-30V. Once triggered, the output will be latched off, and the device needs to be powered on again to recover, so as to avoid permanent damage to the load caused by continuous over-voltage. Q: What is the thermal derating rule of this power supply series in high temperature environments? A: When the ambient temperature is between -40℃ and 60℃, the power supply can continuously output 100% rated power. From 60℃ to 85℃, the allowable output power decreases linearly at a rate of 2.5% per degree Celsius. At the maximum operating temperature of 85℃, the output power is reduced to 37.5% of the rated value, which prevents thermal runaway of the switching MOSFET and high-frequency transformer caused by excessive heat accumulation.