Over-Current Protectors 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 MS engineering to design a PTC to meet your specific application requirements. Features: Typical Applications: • Fast Switching • Telephone Line Fault • No Electrical Noise Protection • Virtually Unlimited Life • Transformer Protection • Self Resetting • FHP Motor Protection • No Contacts • Transistor Protection • Automatic Operation • Speaker Protection • Efficient Over-Current Protectors MS Standard Over-Current Protectors Vmax R25 Ins Ims H d Dmax Maximum Voltage Resistance at 25˚C (±20%) Maximum No Switch Current Minimum Must Switch Current Heat Capacity Dissipation Factor Maximum Diameter (volts) Ω (Amps) (Amps) Watt-sec ˚C mW/˚C (in.) (in.) AWG# 15 0.8 1.0 2.0 0.89 0.77 0.46 1.58 1.37 0.82 0.57 0.48 0.25 15 14 10 .650 .600 .450 .025 .025 .025 22 22 22 P6004A120X100F P5504A120X100F P4004A120X200F 50 5 10 20 0.36 0.21 0.13 0.63 0.37 0.23 0.85 0.38 0.21 15 10 8 .650 .450 .350 .025 .025 .025 22 22 22 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 .025 .025 .025 .020 .020 22 22 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 .025 .020 22 22 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 Wire Diameter MS Part Number 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 MS standard products, Tamin is 0˚C and Tamax is 50˚C. 42 Temperature Sensor Products precisionsensors.meas-spec.com 1711 139th Lane NW Andover, MN 55304 Ph: +1 800.899.9783 12-04-14 www.meas-spec.com