The part number **325-020-520-108** typically refers to a specific series of **Card Edge Connectors** manufactured by **EDAC Inc.** These components are fundamental in electronics for connecting Printed Circuit Boards (PCBs) to a backplane or another motherboard. --- ### Technical Specifications Based on the standard EDAC 325 series nomenclature, here are the technical details for this component: | Feature | Specification | |:---|:---| | **Manufacturer** | EDAC Inc. | | **Series** | 325 Series | | **Connector Type** | Card Edge Connector | | **Gender** | Female (Receptacle) | | **Number of Positions** | 20 Positions | | **Contact Pitch** | 0.156" (3.96mm) | | **Mounting Type** | Through Hole / Chassis Mount | | **Contact Termination** | Wire Wrap / Solder Tail | | **Contact Material** | Copper Alloy | | **Plating** | Gold (Contact Area) / Tin (Tail Area) | --- ### Component Breakdown The part number follows a modular logic used by the manufacturer: 1. **325**: Indicates the specific series (0.156" pitch spacing). 2. **020**: Represents the total number of electrical contacts (20 pins). 3. **520**: Specifies the contact termination style (usually referring to the length and shape of the solder tails). 4. **108**: Defines the mounting hardware or flange style (e.g., threaded inserts or side mounting holes). --- ### Key Applications These connectors are robust and widely used in industrial and vintage computing environments: * **Industrial Controls:** Used in PLC systems and rack-mounted equipment. * **Legacy Computing:** Common in older bus architectures (like early IBM PC or specialized bus systems). * **Power Supplies:** Often used for modular power distribution units. * **Testing Equipment:** Used in interface jigs where boards need to be swapped frequently. --- ### Electrical Ratings While specific data sheets should be consulted for environmental extremes, the 325 series generally adheres to: * **Current Rating:** 3 to 5 Amperes. * **Contact Resistance:** 10 Milliohms maximum. * **Insulation Resistance:** 5000 Megohms minimum. * **Operating Temperature:** -65°C to +105°C.