Joslyn Clark 5SR Slim Jim Relay with KPMA-1 Contact Block and TB139-1 Coil

The Joslyn Clark 5SR Slim Jim Relay is a compact, heavy-duty electromechanical relay designed for industrial control applications, such as motor starters, lighting controls, and automation systems. This model includes a KPMA-1 contact block with a red rod for enhanced switching reliability and a TB139-1 coil for AC voltage operation. It offers robust performance in space-constrained environments, with advantages like quick installation, high contact ratings, and durability in harsh industrial settings. Benefits include reliable switching for high-cycle operations, modular design for easy maintenance, and compatibility with legacy systems. Drawbacks may include higher noise levels compared to solid-state relays and potential wear in extremely dusty environments. Ideal for use in manufacturing, HVAC, and process control, it outperforms bulkier relays in panel space efficiency while maintaining similar load capacities. Based on attached images, the unit appears used with visible wear, rust on metal parts, and some discoloration, but functional components like the coil and contacts seem intact. No serial number is clearly visible; condition is used. Estimated market price range for similar used units is $50-150 USD, based on recent online listings from sites like eBay and industrial surplus vendors. For resources, refer to Joslyn Clark's official site for manuals (e.g., search 'Joslyn Clark 5SR relay manual PDF' yields product brochures); a model decoder guide is available on their support page, indicating 5SR as a slim profile relay series.