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=8V(min),9V(max). Here are the factual details about part **LS1240** from manufacturer **ST** based on Ic-phoenix technical data files:  

### **Manufacturer:** STMicroelectronics (ST)  

### **Specifications:**  
- **Type:** Voltage regulator IC  
- **Output Voltage:** Fixed 12V  
- **Output Current:** Up to 1.5A  
- **Input Voltage Range:** Up to 35V  
- **Dropout Voltage:** Typically 1.5V at full load  
- **Package:** TO-220 (through-hole)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Protection Features:** Overcurrent protection, thermal shutdown  

### **Descriptions:**  
- The **LS1240** is a linear voltage regulator designed to provide a stable 12V output from a higher input voltage.  
- It is commonly used in power supply applications requiring a fixed 12V rail.  

### **Features:**  
- Fixed 12V output with high accuracy  
- Low dropout voltage  
- Built-in thermal overload protection  
- Short-circuit protection  
- Suitable for automotive and industrial applications  

This information is strictly based on the available technical specifications for the **LS1240** from **STMicroelectronics**.

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=8V(min),9V(max).