{"product_id":"55mm-solderless-alligator-clips-screw-terminals-binding-posts-red-black-40pcs","title":"55mm Solderless Alligator Clips with Screw Terminals \u0026 Binding Posts – Red\/Black Test Clips for Power Electronics, 40pcs","description":"\u003ch2\u003e55mm Solderless Alligator Clips with Screw Terminals \u0026amp; Binding Posts – Red\/Black, 40pcs\u003c\/h2\u003e\n\n\u003cp\u003eLarge 55mm alligator clips with integrated screw terminals and binding posts for tool-free wire connection — no soldering required. The screw terminal clamps the wire directly to the clip body; the binding post accepts 4mm banana plugs for connection to bench power supplies, multimeters, and test equipment. The 55mm jaw length provides a secure grip on large terminals, bus bars, battery posts, and power electronics components. Supplied in matched red (positive) and black (negative) pairs for polarity identification.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJaw Length:\u003c\/strong\u003e 55mm (large, for power electronics and battery terminals)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Screw terminal (wire) + 4mm binding post (banana plug)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 15–20A (depending on wire gauge and contact quality)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJaw Material:\u003c\/strong\u003e Copper alloy, nickel-plated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulation:\u003c\/strong\u003e PVC sleeve\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColors:\u003c\/strong\u003e Red and black (20 pairs)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 40 pieces (20 red + 20 black)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eScrew Terminal vs Solder-Type Alligator Clips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolder-type:\u003c\/strong\u003e Wire is soldered to the clip body. Provides the lowest resistance connection. Permanent — wire cannot be changed without desoldering. Best for permanent test leads and production test fixtures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScrew terminal (this product):\u003c\/strong\u003e Wire is clamped by a screw. Tool-free wire change — loosen screw, insert wire, tighten. Slightly higher resistance than solder type due to the screw clamp interface. Best for lab bench use, temporary connections, and applications where the wire gauge or length needs to change frequently.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBinding post (this product):\u003c\/strong\u003e Accepts 4mm banana plugs from bench power supplies and multimeters. Allows rapid connection to standard test equipment without stripping or clamping wires.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eWhat wire gauge can the screw terminal accept?\u003c\/h4\u003e\n\u003cp\u003eThe screw terminal accepts wire from approximately 20AWG (0.5mm²) to 12AWG (4mm²). For stranded wire, use wire ferrules (end sleeves) to prevent individual strands from escaping the clamp area. Solid wire can be inserted directly. Do not exceed the screw terminal’s wire capacity — forcing oversized wire damages the terminal and reduces contact reliability.\u003c\/p\u003e\n\n\u003ch4\u003eWhat is the maximum current for these alligator clips?\u003c\/h4\u003e\n\u003cp\u003eThe jaw-to-terminal contact is rated for 15–20A depending on contact pressure and jaw condition. For sustained high-current applications (battery charging, load testing), ensure the jaw is fully closed on a clean, oxide-free terminal surface. Corroded or partially-open jaws significantly increase contact resistance, causing heating at the clip. For currents above 20A, use dedicated high-current clamps (Kelvin clips or heavy-duty battery clamps).\u003c\/p\u003e\n\n\u003ch4\u003eCan I use these clips for automotive battery testing?\u003c\/h4\u003e\n\u003cp\u003eYes. The 55mm jaw length accommodates standard automotive battery post sizes (top-post and side-post). Ensure the jaw makes full contact with the battery post — partial contact on a corroded post causes high resistance and inaccurate voltage readings. Clean the battery post with a wire brush before attaching the clip for accurate measurements.\u003c\/p\u003e\n\n\u003ch4\u003eAre the binding posts compatible with standard banana plugs?\u003c\/h4\u003e\n\u003cp\u003eYes. The binding posts accept standard 4mm banana plugs used by Fluke, Keysight, Rigol, and other test equipment manufacturers. The binding post also accepts bare wire wrapped around the post shaft and secured by the knurled nut.\u003c\/p\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLab bench testing:\u003c\/strong\u003e Connecting bench power supplies to circuits under test\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery testing:\u003c\/strong\u003e Voltage and capacity testing of automotive, lithium, and lead-acid batteries\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower electronics:\u003c\/strong\u003e Temporary connections to capacitor banks, motor controllers, and inverters during development\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEducational:\u003c\/strong\u003e Physics and electronics lab experiments requiring temporary circuit connections\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomotive diagnostics:\u003c\/strong\u003e Battery load testing, alternator output testing, voltage drop testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cp\u003e40 pieces — 20× red alligator clips + 20× black alligator clips, each with screw terminal and 4mm binding post.\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"Red \/ 40 PCS","offer_id":47850650435829,"sku":"14:200004890#Red;200001249:202408830#40 PCS","price":21.98,"currency_code":"USD","in_stock":true},{"title":"Red combination \/ 40 PCS","offer_id":47850650370293,"sku":"14:200003699#Red combination;200001249:202408830#40 PCS","price":38.47,"currency_code":"USD","in_stock":true},{"title":"Black \/ 40 PCS","offer_id":47850650403061,"sku":"14:200004889#Black;200001249:202408830#40 PCS","price":21.98,"currency_code":"USD","in_stock":true},{"title":"Black combination \/ 40 PCS","offer_id":47850650468597,"sku":"14:200004891#Black combination;200001249:202408830#40 PCS","price":38.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/S94967ef38ab64be0a21c96026b47ce02p.webp?v=1773899411","url":"https:\/\/www.csldmcml.com\/products\/55mm-solderless-alligator-clips-screw-terminals-binding-posts-red-black-40pcs","provider":"Cable Parts Online","version":"1.0","type":"link"}