The **JAPD2-BA-R** is a specific model of a **Miniature Push Button Switch**, commonly used in industrial control panels, medical equipment, and telecommunication devices. It is part of a series often manufactured by companies like **Sunmulon** or similar precision switch specialists. --- ## 1. Technical Specifications The following table highlights the core electrical and physical characteristics of the JAPD2-BA-R: | Parameter | Specification | | :--- | :--- | | **Switch Type** | Momentary Push Button | | **Circuit Configuration** | DPDT (Double Pole Double Throw) | | **Current Rating** | Typically 0.1A to 3A (depending on voltage) | | **Voltage Rating** | 125V AC / 30V DC | | **Mounting Type** | Panel Mount | | **Termination Style** | Solder Lug / PC Pin | | **Illumination** | Non-Illuminated (Standard "BA" series) | --- ## 2. Part Number Breakdown Understanding the suffix codes helps identify the exact electronic behavior: * **JAP**: Series designation (Compact, high-reliability switch series). * **D2**: Indicates the contact arrangement (DPDT - Double Pole, Double Throw). This allows the switch to control two separate circuits simultaneously. * **BA**: Refers to the button shape and style (usually a square or rectangular bezel with a specific actuator height). * **R**: Designates the color of the button cap (Red). --- ## 3. Key Electronic Components The internal construction of the JAPD2-BA-R involves several critical electronic and mechanical parts: ### A. Contact Mechanism It utilizes **Silver or Gold-plated contacts**. Gold-plating is used for "logic level" applications where low current and low voltage are present to prevent oxidation and ensure conductivity. ### B. Spring System A high-tension stainless steel spring provides the **Momentary Action**. This means the electronic circuit is only closed (or opened) while the button is physically depressed; it returns to its original state upon release. ### C. Housing Materials The body is typically made of **Polybutylene Terephthalate (PBT)** or **Diallyl Phthalate (DAP)**. These are high-performance plastics that offer: * High dielectric strength (insulation). * Heat resistance during soldering. * Mechanical durability. --- ## 4. Typical Applications * **Control Logic:** Signal switching in PLC (Programmable Logic Controller) inputs. * **Emergency/Reset:** Small-scale reset buttons for embedded systems. * **Audio/Visual:** Function selection in professional broadcasting equipment.