The PSB-351225 is a 13.8V/2.5A power supply with backup power function designed for uninterrupted device power. It supports a wide AC voltage range (176–264V), has high efficiency (74%), and features short-circuit, overload, and overvoltage protection. Integrated battery charging system (0.5A) with over-discharge protection. Optional MPSB12 automation module available with technical outputs.
The PSB-351225 power supply with backup power function is designed for continuous supply of stabilized 12V DC (+/-15%). It provides a 13.8V DC output voltage with 2A current and an additional 0.5A for battery charging. The unit automatically switches to battery power in case of AC power loss. Integrated protection systems include short-circuit (SCP), overload (OLP), overvoltage (OVP), and excessive battery discharge (UVP) protection.
Additional features: LED indicators for AC and DC voltage, optical signaling, and an optional MPSB12 module that enables monitoring of AC presence, PSU operation, and battery voltage levels. The device is intended for indoor installation, complies with environmental class II, and operates in temperatures ranging from -10°C to +40°C. Its compact dimensions (129 x 98 x 40.5 mm) and easy installation make it suitable for various applications.
| Specification | Value |
|---|---|
| Supply Voltage | 176÷264V AC |
| Current Consumption | 0.45A @ 230VAC max. |
| Supply Power | 35W max. |
| Efficiency | 74% |
| Output Voltage | 11V÷13.8V DC (buffer operation), 9.5V÷13.8V DC (battery operation) |
| Output Current | tAMB<30°C: 2A + 0.5A battery charging, tAMB=40°C: 1.4A + 0.5A battery charging |
| Voltage Adjustment Range | 12÷14V DC |
| Ripple Voltage | 120mV p-p max. |
| Battery Charging Current | 0.5A max. |
| Short-Circuit Protection (SCP) | Electronic, automatic recovery |
| Overload Protection (OLP) | 105-150% of power supply, automatic recovery |
| Overload Protection (Battery) | Polymer fuse (PTC) |
| Surge Protection | Varistors |
| Overvoltage Protection (OVP) | >16V (automatic recovery) |
| Excessive Discharge Protection (UVP) | U<9.5V (± 5%) – battery disconnection |
| Optical Signalization | Green LED – AC voltage presence, LED DC – DC voltage presence at output |
| Additional Accessories | Module MPSB12 |
| Operation Conditions | 2nd environmental class, -10°C÷40°C, relative humidity 20%-90% |
| Dimensions (LxWxH) | 129 x 98 x 40.5 mm |
| Weight (Net/Gross) | 0.39kg / 0.42kg |
| Protection Class | EN 60950-1:2007 I (first) – requires a protective conductor (PE) |
| Storage Temperature | -20ºC...+60ºC |
Data sheet
The PSB-351225 is a 13.8V/2.5A power supply with backup power function designed for uninterrupted device power. It supports a wide AC voltage range (176–264V), has high efficiency (74%), and features short-circuit, overload, and overvoltage protection. Integrated battery charging system (0.5A) with over-discharge protection. Optional MPSB12 automation module available with technical outputs.
