The **MA7HTAD-R** is a specific part number typically associated with **Tadiran Batteries**. It belongs to a specialized category of high-temperature Lithium Thionyl Chloride ($LiSOCl_2$) cells, often utilized in industrial, military, and aerospace applications. --- ## 1. Component Overview The MA7HTAD-R is an **HLC (Hybrid Layer Capacitor)** or a specialized battery assembly part designed to handle high pulse currents and extreme environments. Below are the core technical specifications generally associated with this series: ### Technical Specifications | Parameter | Typical Value | | :--- | :--- | | **Chemistry** | Lithium Thionyl Chloride ($LiSOCl_2$) | | **Voltage** | 3.6V (Nominal) | | **Operating Temp** | -55°C to +125°C (High Temp Rated) | | **Termination** | Radial Tabs / Leads (indicated by "-R") | | **Self-discharge** | <1% per year at room temperature | --- ## 2. Key Electronic Features ### A. High Pulse Capability The "HT" (High Temperature) and "AD" designations often refer to the internal construction optimized for high-drain pulses. Unlike standard batteries that voltage-drop significantly under load, this part maintains a stable voltage plateau. ### B. Thermal Stability The electrolyte and internal seals are engineered to prevent leakage or explosion even when subjected to temperatures exceeding 100°C. This makes it ideal for: * Downhole drilling equipment. * Automotive engine sensors. * Industrial ovens/monitoring. ### C. Low Self-Discharge Utilizing the passivation layer characteristic of $LiSOCl_2$ chemistry, the part can be stored for 10+ years without losing significant capacity, provided it is kept within storage temperature guidelines. --- ## 3. Application Use Cases Due to its robust construction, the MA7HTAD-R is found in specific electronic ecosystems: 1. **Memory Backup:** Providing power to CMOS/SRAM during power outages in high-heat industrial computers. 2. **Remote Telemetry:** Powering sensors in desert environments or near heat-generating machinery. 3. **Military Hardware:** Used in systems requiring long shelf life followed by immediate high-current bursts. --- ## 4. Safety and Handling When integrating this component into a PCB design, observe the following: ```markdown - **Polarity:** Ensure correct orientation; reversing polarity can cause cell rupture. - **Soldering:** Use the radial tabs (-R) for soldering. Avoid direct heat to the battery casing. - **Disposal:** Must be disposed of as hazardous waste due to lithium content. ```