## Detailed Technical Analysis: PCC-SMP-E-5-R The **PCC-SMP-E-5-R** is a specialized electronic component primarily used in temperature sensing and industrial measurement applications. It is a **Surface Mount (SMD) Thermocouple Connector** manufactured by **Omega Engineering**. --- ### 1. Component Identification | Feature | Specification | | :--- | :--- | | **Manufacturer** | Omega Engineering | | **Series** | PCC Series (Circuit Board Connectors) | | **Part Number Breakdown** | **PCC**: Printed Circuit Connector
**SMP**: Subminiature Size
**E**: Type E Thermocouple (Chromel-Constantan)
**5**: Pack size/Quantity indicator (or specific pin length variant)
**R**: Reel Packaging (Tape and Reel) | | **Mounting Type** | Surface Mount Device (SMD/SMT) | --- ### 2. Electronic & Material Composition This part is not a passive component like a resistor; it is an **interconnect** designed to maintain the integrity of a thermocouple signal as it transitions to a Printed Circuit Board (PCB). * **Thermocouple Calibration (Type E):** The contacts are made of specific alloys to match Type E thermocouples (**Chromel** for the positive lead and **Constantan** for the negative lead). This prevents the "Cold Junction" error that occurs when using standard copper connectors. * **Contact Material:** * **Positive (+):** Chromel (Nickel-Chromium) * **Negative (-):** Constantan (Copper-Nickel) * **Body Material:** High-temperature Glass-filled Nylon (capable of withstanding SMT reflow soldering temperatures, typically up to **260°C**). --- ### 3. Key Specifications | Parameter | Value / Detail | | :--- | :--- | | **Connector Type** | Female (Socket) | | **Number of Pins** | 2 (Polarized to prevent reverse insertion) | | **Temperature Rating** | -29°C to 180°C (-20°F to 356°F) for the body | | **Voltage Rating** | Low voltage (Signal level) | | **Solder Compatibility** | Lead-free (RoHS compliant) and Leaded reflow profiles | --- ### 4. Typical Application Circuit The PCC-SMP-E-5-R is usually the first stage in a temperature measurement signal chain: ```mermaid graph LR A[Type E Thermocouple Probe] --> B(PCC-SMP-E-5-R Connector) B --> C[PCB Trace - Thermocouple Alloy or Copper] C --> D[Cold Junction Compensation IC] D --> E[Microcontroller/ADC] ``` --- ### 5. Mechanical Dimensions & Design * **Polarization:** The connector features one pin wider than the other to ensure the thermocouple plug is inserted with the correct polarity. * **Transistor Retainer Clip:** Often includes a small mounting clip or footprint for a TO-92 style thermistor or transistor to perform **Cold Junction Compensation (CJC)** directly at the point of connection. ---