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| RESETTABLE PTCs SURFACE MOUNT PTC 2029L/3425L Series (R) (R) TUV PRODUCT SERVICE * The 2029L/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 2029L/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 2029L/3425L Series PTC cools down and resets to a low resistance value permitting the normal current flow to resume. * The 2029L/3425L Series are surface mountable. AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratory and the Component Acceptance Program of CSA. TUV approved. AGENCY FILE NUMBERS: UL E183209, CSA LR 108832 PHYSICAL SPECIFICATIONS: Materials: Terminal Material: Tin Plated Brass to MIL-T-10727B Lead Solderability: Meets EIA specification RS186-9E Device Labeling: Device is marked with the letter `L', amperage rating and date code. Packaging: Packaged in tape and reel carrier per EIA 481-2 standard Standard reel quantities: Part Number 2029L Series 3425L Series Reel Quantity 2000 1500 Packaging Suffix PR DR OBSOLETE PART Rerating Curve for 2029L /3425L Series 200 Percentage of Rated Current 150 100 50 0 -40 -30 -20 -10 0 10 20 30 40 Temperature (C) 50 60 ENVIRONMENTAL SPECIFICATIONS: Passive Aging: 85C, 1000 Hours. 5% typical resistance change. Humidity Aging: 85C, 85% R.H., 1000 hours. 5% typical resistance change. Thermal Shock: 85C / -40C, 20 times. 10% typical resistance change. Vibration: MIL-STD 202, Method 201. No resistance change. Mechanical Shock: MIL-STD-202, Method 213 test condition I (100 g's, 6 sec.). No resistance change. Max. Surface Temperature: 125C Operating/Storage Temperature: -40C to 85C 70 80 90 For NEW Designs use 1812L series PTC in place of the 2029L Series. 22 RESETTABLE PTCs SURFACE MOUNT PTC 2029L/3425L Series Dimensions (Inches) B D A Recommended Pad Layout (Inches) All dimensions are nominal. Average Time Current Curves .300A .500A .750A 1.00A 1.25A 1.50A 2.00A 2.50A 100 MARKING E F .120 .020-.035 .025* .025 C 10 *0.010 for 2029L050 Series 2029L 3425L RECOMMENDED REFLOW CONDITIONS: (IR, Forced Air Convection, Vapor Phase) Devices are not designed to be wave soldered. OBSOLETE PART A .214 max. .264 max. B .314 max. .374 max. C .090 .145 D .120 .180 E .090 .090 F .380 .420 1 0.1 0.01 0.1 1 10 CURRENT IN AMPERES TIME IN SECONDS 100 ORDERING INFORMATION: Maximum Time To Trip Catalog Number 2029L030 2029L050 2029L075 2029S100 2029L100 2029L125 3425L150 3425L200 3425L250 2029L260 Ihold Itrip Vmax I max Pd RIL RAT = = = = = = = Ihold (A) 0.30 0.50 0.75 1.10 1.10 1.25 1.50 2.00 2.50 2.60 Itrip (A) 0.6 1.0 1.5 2.2 2.2 2.5 3.0 4.0 5.0 5.2 Vmax (Vdc) 60 60 30 15 30 15 15 15 15 6.0 Imax (A) 10 10 40 40 40 40 40 40 40 40 Pd max. (W) 1.7 1.7 1.7 1.7 1.7 1.7 1.9 1.9 1.9 1.7 Current (A) 1.5 2.5 8.0 8.0 8.0 8.0 8.0 8.0 8.0 8.0 Time (Sec) 3.0 4.0 0.3 0.5 0.5 2.0 5.0 12.0 25.0 20.0 Resistance RIL () 1.200 0.350 0.350 0.120 0.120 0.070 0.060 0.050 0.035 0.025 RAT () 4.80 1.40 1.00 0.48 0.48 0.25 0.25 0.13 0.09 0.075 Hold Current: maximum current device will sustain for 4 hours without tripping in 20C still air. Trip Current: minimum current at which the device will trip in 20C still air. Maximum voltage device can withstand without damage at rated current (Imax) Maximum fault current device can withstand without damage at rated voltage (V ) max Power dissipated from device when in the tripped state at 20C still air. Minimum resistance of device in initial (un-soldered) state. Maximum resistance of device at 20C measured one hour after tripping or reflow soldering of 260C for 20 sec. CAUTION: Operation beyond the specified ratings may result in damage and possible arcing and flame. 23 This datasheet has been download from: www..com Datasheets for electronics components. |
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