3425L

Resettable PTCs Surface Mount PTC 3425L Series ® ® The 3425L Series Resettable devices utilize a unique polymer-based, Positive Temperature Coefficient (PTC) material to protect electrical circuits against overcurrent conditions. In normal operation, the 3425L Series PTC has many conductive paths and a very low resistance. In an overcurrent condition, the temperature of the polymer material rises. This dramatically reduces the conductive paths resulting in an immediate rise in resistance. In this condition, the device provides circuit protection by significantly limiting the flow of current. However, once the cause of the initial overcurrent condition is eliminated, the 3425L Series PTC cools down and resets to a low resistance value permitting the normal current flow to resume. The 3425L Series are surface mountable. ENVIRONMENTAL SPECIFICATIONS: Passive Aging: 85°C, 1000 Hours. Humidity Aging: 85°C, 85% R.H., 100 hours. Thermal Shock: 85°C / –40°C, 20 times. 125°C / –55°C, 10 times. Vibration: MIL-STD 202, Method 201. No resistance change. Mechanical Shock: MIL-STD-202, Method 213 test condition I (100 g’s, 6 sec.). Operating/Storage Temperature: –40°C to 85°C Devices should remain in sealed bags prior to use. AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratory and the Component Acceptance Program of CSA. TUV approved. Rerating Curve for 3425L Series 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 -40 -30 -20 -10 0 10...