CORPORATION G491SD ISSUED DATE :2003/01/28 REVISED DATE :2005/05/05B S U R F A C E M O U N T, S C H O T T K Y B A R R I E R D I O D E V O LT A G E 2 5 V, C U R R E N T 1 A Description The G491SD is low power rectification for switching power supply. Package Dimensions REF. A B C D E F Millimeter Min. Max. 2.70 3.10 2.40 2.80 1.40 1.60 0.35 0.50 0 0.10 0.45 0.55 Millimeter Min. Max. 1.90 REF. 1.00 1.30 0.10 0.20 0.40 0.85 1.15 0 10 REF. G H K J L M Absolute Maximum Ratings at Ta = 25 Parameter Symbol Ratings Unit Junction Temperature Tj +125 Storage Temperature Tstg -40 ~ +125 Maximum Recurrent Peak Reverse Voltage VRRM 25 V Maximum RMS Voltage VRMS 18 V Maximum DC Blocking Voltage VDC 20 V Peak Forward Surge Current at 8.3mSec single half sine-wave IFSM 3 A Typical Junction Capacitance between Terminal CJ 30 pF Maximum Average Forward Rectified Current Io 1.0 A Total Power Dissipation PD 225 mW Characteristics at Ta = 25 Characteristics Symbol Min. Max. Unit V(BR)R 25 - V IR = 100uA Maximum Instantaneous Forward Voltage VF - 0.45 V IF = 1A Maximum Average Reverse Current IR - 200 uA VR = 20V Reverse breakdown voltage Test Condition 1/2 CORPORATION ISSUED DATE :2003/01/28 REVISED DATE :2005/05/05B Characteristics Curve Important Notice: All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM. GTM reserves the right to make changes to its products without notice. GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems. GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office And Factory: Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C. TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785 China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165 2/2