NANOSMD270LR-2

PolySwitch® PTC Devices Overcurrent Protection Device PRODUCT: nanoSMD270LR-2 DOCUMENT: SCD28284 REV LETTER: F REV DATE: AUGUST 13, 2014 PAGE NO.: 1 OF 2 Specification Status: Released Maximum Electrical Rating Voltage: 6.0VDC Short Circuit Current: 50A Notes: 1. Termination Finish: NiAu 2. Drawing not to scale 3. For battery application only Marking: L TABLE I. DIMENSIONS: mm: in: A B C D MIN MAX MIN MAX MIN MAX MIN MAX 3.00 3.43 0.50 1.00 1.37 1.85 0.25 0.75 (0.118) (0.135) (0.019) (0.039) (0.054) (0.073) (0.010) (0.030) TABLE II. PERFORMANCE RATINGS: CURRENT RATINGS** TIME TO TRIP** AMPERES AMPERES AMPERES SECONDS AT 0°C AT 20°C AT 60°C AT 20°C, 8.0A HOLD TRIP HOLD TRIP HOLD TRIP MAX 3.0 7.5 2.7 6.3 1.6 4.5 5.0 RESISTANCE VALUES OHMS AT 20°C MIN MAX* .005 .018 TRIPPED-STATE POWER DISSIPATION** WATTS AT 20°C, 6.0V MAX 1.0 *Maximum resistance is measured 24 hours after reflow. **Values specified were determined using PCB’s with 0.105” x 1.0 ounce copper traces. Agency Recognition: Reference Document: Precedence: Effectivity: CAUTION: UL, CSA, TÜV PS300 This specification takes precedence over documents referenced herein. Reference documents shall be the issue in effect on the date of invitation for bid. Operation beyond the rated voltage or current may result in rupture, electrical arcing or flame. Materials Information ROHS Compliant ELV Compliant Pb-Free Halogen Free* HF * Halogen Free refers to: Br≤900ppm, Cl≤900ppm, Br+Cl≤1500ppm. PolySwitch® PTC Devices Overcurrent Protection Device PRODUCT: nanoSMD270LR-2 DOCUMENT: SCD28284 REV LETTER: F REV DATE: AUGUST 13, 2014 PAGE NO.: 2 OF 2 Recommended pad layout (mm.) 2.00 1.75 1.10 1.10 Recommended reflow profile Profile Feature Average ramp up rate (Tsmax to Tp) Preheat • Temperature min. (Tsmin) • Temperature max. (Tsmax) • Time (tsmin to tsmax) Time maintained above: • Temperature (TL) • Time (tL) Peak/Classification temperature (Tp) Time within 5°C of actual peak temperature (tp) Ramp down rate Time 25°C to peak temperature Pb-Free Assembly 3°C/s max. 150°C 200°C 60-120s 217°C 60-150s 260°C 30s max. 2°C/s max. 8 mins max. Note: All temperatures refer to top side of the package, measured on the package body surface. Solder reflow recommendation        Recommended reflow methods: IR, hot air and Nitrogen Recommended maximum solder paste thickness: 0.25mm Recommended minimum stencil thickness: 0.1mm Devices can be cleaned using standard methods and aqueous solvents. TE believes the optimum conditions for forming acceptable solder fillets occur when a reasonable amount of solder paste is placed underneath each device's termination. As such, we request that customers comply with our recommended solder pad layouts. Customer should validate that the solder paste amount and reflow recommendations meet its application. TE requests that customer board layouts refrain from placing raised features (e.g. vias, nomenclature, traces, etc.) underneath PolySwitch devices. It is possible that raised features could negatively impact solderability performance of our devices. © 2012, 2014 Tyco Electronics Corporation, a TE Connectivity Ltd. company. All rights reserved.