The part number **R3-NC1-R** typically refers to a specific series of **industrial push-button switches** or **limit switches**, often associated with brands like **IDEC** or **Schneider Electric** (depending on the specific catalog context). In most industrial electrical systems, this part number decodes into specific technical characteristics. --- ### 1. Part Number Breakdown (Typical) | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | **R3** | Refers to the 30mm or specific compact mounting series. | | **Contact Type** | **NC** | **Normally Closed.** The circuit is closed by default and opens when actuated. | | **Quantity** | **1** | Indicates one contact block is included. | | **Color/Type** | **R** | **Red.** Usually signifies an Emergency Stop or Stop function. | --- ### 2. Key Specifications These parts are designed for heavy-duty industrial control panels. * **Mounting Diameter:** Usually 30mm (Standard for R3 series). * **Contact Rating:** Typically 10A at 600VAC (A600 rating). * **Operating Temperature:** -25°C to +50°C. * **Ingress Protection:** IP65 (Dust-tight and protected against water jets). * **Material:** High-impact polycarbonate or chrome-plated zinc. --- ### 3. Electronic Functionality The **NC (Normally Closed)** contact is the critical electronic component. * **Safety Logic:** In a circuit, an NC contact is used for "Fail-Safe" operations. If a wire breaks or the button is pushed, the circuit is broken, stopping the machinery. * **Mechanical Life:** Designed for 500,000 to 1,000,000 cycles. * **Terminal Type:** Screw terminals for secure industrial wiring. --- ### 4. Wiring Diagram Representation In a schematic, the R3-NC1-R is represented as follows: ```text [ Control Voltage ] | | +------|------+ | (NC) | <-- R3-NC1-R Switch +------|------+ | | [ Load / Relay ] ``` ---