MURF550PFG Datasheet, PDF (3/8 Pages) ON Semiconductor – SWITCHMODE Power Rectifier

MUR550APFG, MURD550PFG, MUR550PFG, MURF550PFG, NRVUD550PFT4G
NOTE 2 — AMBIENT MOUNTING DATA
Data shown for thermal resistance junction−to−ambient
(R_qJA) 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 FOR R_qJA IN STILL AIR
Mounting
Method
1
2
R_qJA
3
Lead Length, L (IN)
1/8 1/4 1/2 3/4
50 51 53 55
58 59 61 63
28
Units
C/W
C/W
C/W
MOUNTING METHOD 1
P.C. Board Where Available Copper
Surface area is small.
L
L
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
MOUNTING METHOD 2
Vector Push−In Terminals T−28
L
L
ÉÉÉÉÉÉÉÉÉÉÉÉ
MOUNTING METHOD 3
P.C. Board with
1−1/2 x 1−1/2 Copper Surface
ÉÉ _{L = 1/2}
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉ _{Board Ground Plane}
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