The **970-TX..-DS/02** refers to a specific series of high-quality **PCB Terminal Blocks** manufactured by **WECO**. These components are essential in power electronics for bridging the gap between external wiring and a printed circuit board. --- ## 🟢 Technical Specifications The "970-TX" series is characterized by its **Metric (5.0 mm)** or **Imperial (5.08 mm)** pitch and its robust wire-guard protection system. | Feature | Specification | | :--- | :--- | | **Pitch** | 5.0 mm (0.197 in.) / 5.08 mm (0.20 in.) | | **Current Rating** | Up to 15A | | **Voltage Rating** | 300V (Standard) | | **Wire Range** | 22 - 12 AWG (Solid or Stranded) | | **Material** | Polyamide (PA) Housing, Tin-plated Brass Terminals | | **Mounting Type** | Through-Hole (THT) | | **Screw Type** | M3 Zinc-plated Steel | --- ## 🛠️ Component Breakdown ### 1. The "DS" Designation (Wire Protector) The **-DS** suffix is critical. It stands for **"Wire Protector"** (Drahtschutz). * Unlike cheaper models where the screw presses directly onto the copper wire (potentially shearing it), the DS version includes a stainless steel leaf spring. * The screw pushes the spring, which then distributes pressure evenly across the wire. This is mandatory for using stranded wires without ferrules. ### 2. The "/02" Suffix This denotes the **Number of Poles**. * **/02** indicates a **2-position** terminal block. * These are often "side-stackable," meaning you can slide multiple units together to create a longer strip (e.g., two 2-pole units to make a 4-pole connector). ### 3. Contact Geometry * **Terminal:** Tin-plated copper alloy for low contact resistance and high corrosion resistance. * **Solder Pins:** Designed with a specific length (usually 3.5mm) to ensure stable mechanical anchoring during wave soldering. --- ## 📐 Application Use Cases This component is commonly found in: 1. **Industrial Controls:** Connecting sensors and actuators to PLCs. 2. **Power Supplies:** Input/Output stages for AC/DC converters. 3. **HVAC Systems:** Wiring for thermostats and motor controllers. 4. **DIY/Prototyping:** Widely used in "Ardu-shield" type boards due to the standard 5.0mm pitch. --- ## ⚠️ Installation Notes * **Torque:** Do not exceed the recommended torque (typically **0.5 Nm**). Over-tightening can strip the plastic housing or the M3 screw threads. * **Stripping Length:** Ensure the wire is stripped to approximately **5-6 mm** to prevent the insulation from getting caught under the wire protector.