1N5400 thru 1N5408NOTE 1 — AMBIENT MOUNTING DATA Data shown for thermal resistance junction−to−ambient (RqJA) for the mountings shown is to be used as typical guideline values for preliminary engineering or in case the tie point temperature cannot be measured. TYPICAL VALUES FORR q JA IN STILL AIRMountingLead Length, L (IN)R q JAMethod1/81/41/23/4 1 50 51 53 55 °C/W 2 58 59 61 63 °C/W 3 28 °C/W MOUNTING METHOD 1MOUNTING METHOD 3P.C. Board Where AvailableP.C. Board withCopper Surface area is small1−1/2” x 1−1/2”Copper SurfaceLLL = 1/2” ÉÉÉÉÉÉÉÉÉ ÉÉ ÉÉ MOUNTING METHOD 2Vector Push−In Terminals T−28 ÉÉ ÉÉ Board Ground Plane ÉÉ LL ÉÉÉÉÉÉÉÉÉ www.onsemi.com3