PTC Thermistor Over-Current Protectors ADVANCED THERMAL PRODUCTS, Inc. Positive Temperature Coefficient thermistors are used in a wide variety of applications to protect sensitive components against Over-Current conditions. The PTC is unique in its ability to limit excess current during fault conditions, and then automatically reset to a normal operating mode when the fault is removed. Select a part from our Standard Over-Current Protectors or contact ATP engineering to design a PTC to meet your specific application requirements. Features * Fast Switching * No Electrical Noise * Virtually Unlimited Life * Self Resetting * No Contacts * Automatic Operation * Efficient Typical Applications * Telephone Line Fault Protection * Transformer Protection * FHP Motor Protection * Transistor Protection * Speaker Protection Typical Over-Current Protectors ATP Standard Over-Current Protectors V max R25 Ins Ims Maximum Voltage Resistance at 25C (20%) Maximum No Switch Current (volts) (Amps) (Amps) 15 0.8 1.0 1.5 2.0 0.89 0.77 0.56 0.46 50 5 10 20 H Minimum Heat Must Switch Capacity Current D max Wire Diameter ATP Part Number Dissipation Factor Maximum Diameter Watt-sec C mW/C (in.) (in.) AWG# 1.58 1.37 0.99 0.82 0.57 0.48 0.32 0.25 15 14 11 10 .650 .600 .500 .450 .032 .032 .020 .020 20 20 24 24 P6004A120X080F P5504A120X100F P4504A120X150F P4004A120X200F 0.36 0.21 0.13 0.63 0.37 0.13 0.85 0.38 0.21 15 10 8 .650 .450 .350 .032 .020 .020 20 20 24 P6006C120X500F P4006C120X101F P3006C120X201F 132 7 10 25 50 100 0.31 0.25 0.13 0.08 0.05 0.55 0.45 0.23 0.15 0.10 1.41 1.19 0.48 0.25 0.16 16 15 10 8 7 .650 .600 .400 .300 .250 .032 .032 .025 .020 .020 20 20 22 24 24 P6010D120X700F P5510D120X101F P3510D120X251F P2510D120X501F P2010D120X102F 265 25 50 100 0.14 0.09 0.06 0.25 0.16 0.10 0.94 0.53 0.24 12 9 8 .450 .350 .250 .025 .020 .020 22 24 24 P4015E120X251F P3015E120X501F P2015E120X102F 400 50 100 0.10 0.06 0.18 0.11 0.96 0.49 12 9 .400 .300 .025 .020 22 24 P3520F120X501F P2520F120X102F NOTES 1. Maximum Voltage listed as DC or 60 Hz. AC. 2. Maximum No Switch Current (Ins) is the maximum current that the PTC can pass without switching into its high resistance state. 3. Minimum Must Switch Current (Ims) is the minimum current that is necessary to switch the PTC into its high resistance state. 4. Ins is calculated at the maximum ambient temperature, while Ims is determined at the minimum ambient temperature. For ATP standard products, Tamin is 0C and Tamax is 50C. 34 Advanced Thermal Products, Inc. * P.O. Box 249 * 328 Ridgway Road * St. Marys, PA 15857 * Phone: 814-834-1541 Fax: 814-834-1556 * E-mail: sales@atpsensor.com * Web Site: www.atpsensor.com