The **SVB-A0-R** is an industrial-grade safety component manufactured by **IDEC** (specifically within the X6 series). It is primarily categorized as an **Emergency Stop (E-Stop) Switch Unit**. Below is a detailed breakdown of its electronic and mechanical specifications. ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Contact Configuration** | 2NC (Two Normally Closed contacts) | | **Action Type** | Pushlock Turn Reset (Maintained action) | | **Mounting Hole Size** | 16mm | | **Contact Material** | Gold-plated silver | | **Rated Insulation Voltage** | 250V | | **Thermal Current (Ith)** | 5A | | **Ingress Protection** | IP65 (Dust-tight and water-jet resistant) | --- ### 2. Electronic Characteristics The electronic functionality of the SVB-A0-R is centered around its safety-critical switching mechanism: * **Positive Action Structure:** The switch features a "Direct Opening Action" (IEC 60947-5-1). This ensures that even if the contacts are lightly welded together, the mechanical force of pushing the button will physically force the circuit open. * **Safe Break Action:** IDEC’s proprietary technology ensures that if the contact block becomes detached from the operator due to excessive vibration or damage, the NC contacts will automatically open, bringing the machine to a safe stop. * **Low-Level Switching:** Because the contacts are **gold-plated**, the SVB-A0-R is highly reliable for switching low-voltage/low-current logic signals (e.g., 5V DC at 1mA), which is common in PLC safety inputs. --- ### 3. Physical & Mechanical Design * **Reset Method:** This is a "Turn Reset" model. Once pressed, the button locks in the downward position and must be rotated clockwise to release and reset the circuit. * **Termination:** It typically uses **Solder/Tab terminals**, allowing for either direct soldering of wires or the use of quick-connect crimp connectors. * **Compact Form Factor:** The 16mm mounting diameter makes it ideal for small control panels, handheld pendants, or medical equipment where space is limited. --- ### 4. Typical Applications The SVB-A0-R is used in environments where user safety and circuit interruption are mandatory: 1. **Industrial Robotics:** Integrated into teach pendants. 2. **Medical Devices:** Used as a localized emergency cutoff. 3. **OEM Machinery:** Small-scale automation units requiring ISO 13849-1 compliance. ---