The part number **B-2JLN-R** refers to a high-quality **Subminiature Sealed Toggle Switch** manufactured by **NKK Switches**. This specific part is part of the **B Series** of process-sealed, logic-level toggles designed for PC board mounting. ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | NKK Switches | | **Series** | B Series (Antistatic) | | **Circuit Type** | DPDT (Double Pole, Double Throw) | | **Switch Function** | ON - ON | | **Current Rating** | 0.4VA Max @ 28V AC/DC Max (Logic Level) | | **Mounting Type** | Through Hole, Right Angle (Horizontal) | | **Actuator Style** | Standard Lever (Locking/Non-locking variants exist) | | **Sealing** | Process Sealed (Washable) | | **Termination** | PC Pins | --- ### Key Component Features #### 1. Logic Level Rating The "0.4VA" rating indicates this switch is designed for **Logic Level** applications. It uses gold-plated contacts to ensure high reliability when switching very low voltages and currents, preventing the oxidation that typically affects silver contacts in low-power circuits. #### 2. Process Sealed Construction The "Sealed" designation means the body is ultrasonically welded and the terminals are epoxy-sealed. This allows the PCB to be subjected to automated wave soldering and rigorous cleaning/washing processes without contaminants entering the switch mechanism. #### 3. Antistatic Design The B Series is known for its carbon-impregnated bushings and antistatic properties. This protects the sensitive logic-level components behind the switch from electrostatic discharge (ESD) that could occur when a user touches the toggle. #### 4. Right Angle Orientation (The "LN" Suffix) The "LN" configuration typically denotes a specific terminal spacing or orientation. In this case, it is designed for **Right Angle** mounting, meaning the toggle stick protrudes horizontally from the edge of the board when the pins are soldered vertically into the PCB. --- ### Common Applications * **Handheld Instruments:** Due to the small "subminiature" footprint. * **Medical Equipment:** Where reliability and cleaning (washability) are required. * **Telecommunications:** Signal routing in rack-mounted hardware. * **Industrial Controls:** Used as configuration switches on internal control boards.