Data Sheet

POWER – NIKKOHM
45W SMD POWER CHIP RESISTOR, TCP45
Applications
Tape Packaging, 1000pcs / 254mm reel, Z01
1.75
24.0+/-0.3
8.70
2.00
4.00
3.75
11.50
13.90
0.30+/-0.05
Dia. 1.50+0.1-0
Dia.1.50+0.1-0
RoH
S
Metal insulated circuit board improves thermal
absorption performance from resistor to
heat-sink.
Metal base
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Max 12W power application to TCP45 on
47mm x 73mm aluminum insulated circuit
board in free air (without heat sink).
25W DPAK and 45W TCP45 on metal insulated circuit board
Max 25W power application to TCP45 on 47mm
x 73mm aluminum insulated circuit board and
heat-sink.
For your reference
Thermal resistance between resistor area to base metal of
TCP45 is 3.0 °C/W.
Vertical thermal resistance of FR4 both side copper
printed circuit board with 1.5 mm thickness and 1.0 inch
square is approximately 10 °C/W.
Thermal resistance of the single thermal via with
dimension of 0.5mm diameter and 1.5mm length is around
100 °C/W, when 16 pieces of thermal via under base
metal portion of resistor realize 6.25 °C/W.
Thermal via improves thermal absorption
performance from resistor to heat-sink.
Please be careful to relax the differences o
f
coefficient of expansion between printed
circuit board and alumina.
Thermal via
Copper insertion improves thermal
absorption performance from resistor to
heat-sink.
Please be careful to relax the differences o
f
coefficient of expansion between printed
circuit board and alumina.
Copper insertion
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