Based on the technical nomenclature provided, the code **KLS-A-B-R** typically refers to a specific naming convention used by manufacturers like **KLS Electronic** (a major Chinese manufacturer of connectors and electronic components). While "A-B-R" are placeholders for specific series variables, this format most commonly describes **D-Sub connectors** or **Modular Jacks**. Below is a breakdown of the electronic characteristics and structural parts based on standard KLS datasheets. --- ## 1. Component Identification In the KLS catalog, this sequence usually defines the following attributes: | Part Segment | Definition | Common Electronic Values | | :--- | :--- | :--- | | **KLS** | Manufacturer Prefix | KLS Electronic Co., Ltd. | | **A** | Product Category | e.g., 1 = D-Sub, 13 = USB, 12 = RJ45 | | **B** | Pin Count / Sub-type | 09, 15, 25 (Pins) or 4P4C, 8P8C (Modular) | | **R** | Orientation / Mounting | R = Right Angle (90°), S = Straight (180°) | --- ## 2. Key Electronic Specifications Most components under this numbering scheme share these electrical characteristics: ### A. Electrical Ratings * **Current Rating:** Typically 1.0A to 3.0A (depending on pin thickness). * **Voltage Rating:** 250V AC/DC. * **Contact Resistance:** $\le$ 20m$\Omega$ (Initial). * **Insulation Resistance:** $\ge$ 1000M$\Omega$ at 500V DC. * **Dielectric Strength:** 500V AC for 1 minute. ### B. Material Composition * **Contacts:** Phosphor Bronze or Brass (usually gold plated over nickel). * **Insulator:** PBT (Polybutylene Terephthalate) or UL94V-0 rated plastic. * **Shell:** Cold rolled steel with Tin or Nickel plating for EMI shielding. --- ## 3. Structural Design (Right Angle "R" Series) If the part ends in **"R"**, it is a **Right Angle PCB Mount** component. Its physical parts include: 1. **Boardlocks:** Metal clips used to secure the part to the PCB before soldering. 2. **Mounting Holes:** Usually threaded (UNC 4-40) for securing external cable hoods. 3. **Solder Tails:** Pins bent at 90 degrees for Through-Hole Technology (THT) assembly. 4. **D-Shape Shield:** Provides mechanical polarization (ensures correct orientation when plugging). --- ## 4. Common Application Scenarios * **KLS1-202-09-R:** A 9-pin Male D-Sub Right Angle connector (Serial Port). * **KLS12-188-8P8C-R:** A Right Angle RJ45 Network Jack. * **KLS1-208-15-R:** A High-Density VGA connector for monitor interfaces. ---