Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max). The part **LS1240A+** is manufactured by **UTC (Unisonic Technologies Co., Ltd.)**. Below are the specifications, descriptions, and features based on available information:  

### **Specifications:**  
- **Type:** Voltage Regulator (Positive Fixed)  
- **Output Voltage:** +5V  
- **Output Current:** Up to 1A  
- **Input Voltage Range:** Up to 35V  
- **Dropout Voltage:** Typically 2V at full load  
- **Package:** TO-220  
- **Operating Temperature Range:** 0°C to +125°C  
- **Line Regulation:** 0.2% (Typical)  
- **Load Regulation:** 0.4% (Typical)  
- **Internal Thermal Overload Protection:** Yes  
- **Short-Circuit Protection:** Yes  

### **Description:**  
The **LS1240A+** is a 3-terminal positive voltage regulator designed to provide a fixed +5V output with a maximum current of 1A. It is suitable for a wide range of applications, including power supplies, industrial controls, and consumer electronics.  

### **Features:**  
- Fixed +5V output  
- High ripple rejection  
- Low standby current consumption  
- Built-in thermal and short-circuit protection  
- TO-220 package for easy heat dissipation  

For exact performance characteristics, refer to the official **UTC datasheet**.

Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).