The **PCC-OST-J-R** is a specialized electronic component manufactured by **Omega Engineering**. It belongs to the category of thermocouple connectors, specifically designed for circuit board mounting. --- ### 1. Part Number Breakdown To understand the electronic specifications, we can decompose the part number: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **PCC** | Component Type | Printed Circuit Board Connector | | **OST** | Series | Standard size thermocouple connector | | **J** | Calibration | Type J (Iron/Constantan) | | **R** | Feature | Features a "Reverse" or "Rear" mounting clip/bracket | --- ### 2. Key Technical Specifications These connectors are used to interface thermocouple probes directly with a PCB, ensuring that the cold junction compensation remains accurate. * **Calibration Type:** Type J (Black color-coded per ANSI standards). * **Material:** The pins are made of actual thermocouple alloys (Iron and Constantan) to prevent the introduction of parasitic EMFs (errors). * **Mounting Type:** Through-hole soldering for PCBs. * **Service Temperature:** Typically rated for up to **220°C (425°F)**. * **Orientation:** Vertical mounting, allowing for standard thermocouple plugs to be inserted from the top. --- ### 3. Electronic Design Features * **Cold Junction Compensation:** Because the pins are made of thermocouple-grade alloys, the electrical transition from the probe to the circuit board does not create a "new" junction that would skew temperature readings. * **Transistor Retaining Clip:** The "R" in the part number often signifies a design that includes a spring-loaded clip or a specific mounting bracket that secures the connector to the board, preventing mechanical stress on the solder joints. * **Polarization:** The pins are different sizes (one wide, one narrow) to ensure that the thermocouple is connected with the correct polarity, preventing inverted temperature readings. --- ### 4. Application Use Cases 1. **Industrial Controllers:** Used in PID controllers and PLCs where temperature data is processed. 2. **Data Loggers:** Integrating high-accuracy temperature sensing into portable or fixed logging devices. 3. **Lab Equipment:** Providing a standardized interface for external probes on scientific instruments.