MUR490E Datasheet, PDF (5/6 Pages) Motorola, Inc – ULTRAFAST RECTIFIERS 4.0 AMPERES 900-1000 VOLTS

NOTE 1 — AMBIENT MOUNTING DATA
MUR490E MUR4100E
Data shown for thermal resistance junction–to–ambient
(R_θJA) 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_θJA IN STILL AIR
Mounting
Method
1
2
R_θJA
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.
ÉÉÉÉÉÉÉÉ^L ÉÉÉÉÉÉÉÉ^L ÉÉÉÉÉÉ
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
ÉÉÉÉ _{L = 1/2″}
ÉÉÉÉÉÉÉÉÉÉÉÉ _{Board Ground Plane}
Rectifier Device Data
5