unisonic technologies co., ltd ummsz52xxa preliminary diode www.unisonic.com.tw 1 of 3 copyright ? 2013 unisonic technologies co., ltd qw-r601-094. a surface mount silicon zener diode ? description the utc ummsz52xxa is a surface mount silicon zener diode, it uses utc?s advanced technology to provide customers with low reverse leakage current, etc. the utc ummsz52xxa is suitable for automated assembly processes. ? features * low reverse leakage current ? symbol 2 1 ak sod-123 2 1 ? ordering information ordering number package pin assignment packing lead free halogen free 1 2 ummsz52xxal-ca2-r ummsz52xxag-ca2-r sod-123 a k tape reel note: pin assignment: a: anode, k: cathode ? marking information package voltage code marking sod-123 5.1: 5.1v 6.2: 6 . 2 v 18: 18v 20: 20v
ummsz52xxa preliminary diode unisonic technologies co., ltd 2 of 3 www.unisonic.com.tw qw-r601-094. a ? absolute maximum ratings parameter symbol ratings unit zener current i zm 115 ma peak forward surge current, 8.3ms single half sine-wave superimposed on rated load (note 2) i fsm 4.0 a power dissipation at 75c (note 1) p d 500 mw operating junction temperature t j -50~+150 c note: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. mounted on 5.0mm 2 (.013mm thick) land areas. 3. measured on 8.3ms, single half sine-wave or equi valent square wave, duty cycle=4 pulses per minute maximum. ? electrical characteristics for ummsz5231a parameter symbol test conditions min typ max unit nominal zener volage v z i zt =20ma 5.0 5.1 5.2 v zener impedance z zt i zt =20ma 17 ? z zk i zk =0.25ma 1600 ? reverse leakage current i r v r =2v 5 a for ummsz5234a parameter symbol test conditions min typ max unit nominal zener volage v z i zt =20ma 6.08 6.2 6.32 v zener impedance z zt i zt =20ma 7 ? z zk i zk =0.25ma 1000 ? reverse leakage current i r v r =4v 5 a for ummsz5248a parameter symbol test conditions min typ max unit nominal zener volage v z i zt =7ma 17.64 18 18.36 v zener impedance z zt i zt =7ma 21 ? z zk i zk =0.25ma 600 ? reverse leakage current i r v r =14v 0.1 a for ummsz5250a parameter symbol test conditions min typ max unit nominal zener volage v z i zt =6.2ma 19.6 20 20.4 v zener impedance z zt i zt =6.2ma 25 ? z zk i zk =0.25ma 600 ? reverse leakage current i r v r =15v 0.1 a
ummsz52xxa preliminary diode unisonic technologies co., ltd 3 of 3 www.unisonic.com.tw qw-r601-094. a utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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