The **BS-163-R** is a specific electronic component primarily identified as a **Coin Cell Battery Holder**. It is designed to house a CR2032 or similar 20mm lithium coin cell battery on a Printed Circuit Board (PCB). Below is a detailed breakdown of its specifications and electronic characteristics. --- ### 1. Key Technical Specifications | Feature | Description | | :--- | :--- | | **Component Type** | Coin Cell Retainer / Holder | | **Battery Size** | CR2032 (most common), CR2025, CR2016 | | **Mounting Type** | Through-Hole (THY) or Surface Mount (SMD)* | | **Contact Material** | Phosphor Bronze (usually Gold or Nickel plated) | | **Insulator Material** | Liquid Crystal Polymer (LCP) or PBT Plastic | | **Flammability Rating** | UL 94V-0 | *\*Note: The "-R" suffix often denotes "Tape & Reel" packaging for automated SMT assembly, though it can vary by manufacturer.* --- ### 2. Physical Design & Dimensions The BS-163-R is engineered for low-profile applications. Its design focuses on three main aspects: 1. **Pressure Contacts:** It utilizes the spring tension of the metal arm to ensure a constant electrical connection with the positive (+) side of the battery. 2. **Polarity Protection:** The plastic housing is shaped to prevent the battery from being inserted backwards, protecting the circuit from reverse polarity. 3. **Solder Tabs:** These are the "legs" that connect the battery power to the PCB traces. --- ### 3. Electrical Characteristics Despite being a mechanical holder, it has specific electrical parameters to consider for circuit stability: * **Contact Resistance:** Typically $< 30 m\Omega$. This ensures minimal voltage drop between the battery and the load. * **Current Rating:** Usually rated for low-current applications (up to 0.5A or 1A), which is standard for coin cell usage (RTCs, memory backup). * **Insulation Resistance:** $> 1000 M\Omega$ at 500V DC to prevent leakage between the positive and negative terminals. --- ### 4. Common Applications The BS-163-R is found in devices where space is at a premium and a reliable backup power source is needed: * **Motherboards:** For maintaining the BIOS/CMOS settings. * **Remote Controls:** For car key fobs or small home appliances. * **Medical Devices:** Handheld monitors and glucose meters. * **IoT Sensors:** Low-power wireless nodes. ---