*R oH V SC AV ER OM AI SIO PL LA N IA BL S NT E Features ■ ■ ■ ■ RoHS compliant* versions available Overvoltage/lightning protection to ITU-T K.20 Standard “off-the-shelf” design Typical application is secondary protection on telecom line cards 4A12P-506-500 - Surge Line Protection Module Matched Pair of Resistors plus Thermal Fuse Product Dimensions Electrical Characteristics 32.81 MAX. (1.292) Resistance Values (R1 = R2)........................................................50 Ω Resistance Tolerance..................................................................±1 % TCR ..................................................................................100 ppm/°C Ratio Tolerance ........................................................................±0.5 % Power Dissipation (per resistor) @ 25 % .......................................2 W Temperature Range...................................................-40 ºC to +85 ºC 12.70 14.59 (.500) (.575) 1 2 Physical Characteristics Body Style .............................................Dual in line SMD - twin pack Substrate Material ........................................................96 % Alumina Lead Frame Material .......................................Copper, solder coated Flammability .....................................................Conforms to UL94V-0 Processability................Unit is only suitable for no-clean processing Convection Reflow...................Unit will withstand 260 °, 20 seconds Packaging ..................16 “ diameter reels, 44mm tape, 250 pcs./reel 4 8 10 11 3.72 (.146) 2.54 ± .13 (.100 ± .005) 10.16 ± .13 (.400 ± .005) 5.08 ± .13 (.200 ± .005) 5.28 ± .013 (0.208 ± .005) Functional Characteristics Lightning Surge Test...........................................10 x 700 µSec, 1 KV Power Induction ...................................................................300 Vrms Power Contact .....................................................................220 Vrms 13.40 ± .25 (.527 ± .010) 2.54 ± .25 (.100 ± .010) How To Order 4A 12 P - 506 - 500 LF Model (4A = Surface Mount) 7.11 ± .25 (0.280 ± .010) Number of Pins DIMENSIONS: Physical Configuration Electrical Configuration 506 = Matched Pair of Resistors plus Thermal Fuse Resistance Code • 500 = 50 Ω RoHS Compliant Option Blank = Standard Product LF = RoHS Compliant Product Electrical Schematic 1 22 2 21 R1 www.bourns.com *RoHS Directive 2002/95/EC Jan 27, 2003 including Annex. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. R4 4 19 8 15 R2 Asia-Pacific: TEL +886- (0)2 25624117 • FAX +886- (0)2 25624116 Europe: TEL +41-41 7685555 • FAX +41-41 7685510 Americas: TEL +1-951 781-5500 • FAX +1-951 781-5700 MILLIMETERS (INCHES) R3 10 13 11 12 REV. 06/11