{"title":"Muscle Wire - 0.005 Diameter (1 foot)","handle":"muscle-wire-0-005-diameter-1-foot","url":"/products/muscle-wire-0-005-diameter-1-foot","description":"Muscle Wire is a shape memory alloy (Nitinol — nickel-titanium) that contracts when heated or when an electrical current is applied, then returns to its original length when cooled. This property makes it useful as a lightweight, silent alternative to small motors or solenoids in robotic and interactive projects.\n\nWhen in its low-temperature martensitic form, the wire can be bent and shaped freely. Applying approximately 200 mA of current (or heating to around 100°C) causes it to transition to its stronger austenite form, recovering its trained shape with considerable force. The wire can be annealed at approximately 500°C to set a new memory shape.\n\nKey Features\n\n\nShape Memory Alloy – Contracts when heated or energised, returns to shape when cooled\n\nElectrically Actuated – Approximately 200 mA activates the transition\n\nHigh Pull Force – 2.2 N (0.49 lbs) for its small diameter\n\nRe-trainable – Anneal at ~500°C to set a new memory shape\n\nSilent Operation – No motors or gears required\n\n\nSpecifications\n\n\nMaterial – Nickel-titanium (Nitinol)\n\n\nLength – 305 mm (1 ft)\n\nDiameter – 0.127 mm (0.005″)\n\nActivation Current – ~200 mA\n\nActivation Temperature – ~100°C\n\nPull Force – 2.2 N (0.49 lbs)\n\nResistance – 74.8 Ω/m (1.9 Ω/inch)\n\n\nPackage Contents\n\n1× Muscle Wire, 0.127 mm diameter, 305 mm length\n\n\n\nNote: The datasheet linked below is for Flexinol actuator wire, which is similar but not identical to Muscle Wire. Flexinol wires are designed specifically for linear actuator applications.\n\n\nResources\n\nFlexinol Actuator Wire Datasheet (PDF)\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":10912,"title":"Default Title","sku":"SF-COM-11899","price":3.9,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":229,"option1":"Default Title"}]}