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Resistors by Fukushima Futaba Electric Co. / Japan
MPC

REV: 16.09.2014

Fukushima Futaba
MPC by Fukushima Futaba

Low Ohm Power Resistors

The special construction characteristics of the metalband resistors of Fukushima Futaba offer in comparison to the already known axial lopped wirewound resistors many advantages. The resistor element is punched like meander out of a special metalband (special alloy of Ni/Cr/Fe/Cu). On this element the lead wires are welded without caps.
This two-dimensional type therefore only has a very low inductive resistance. The negative effect of the enormous temperature decrease of the 'hotspot-zone' in the mid of the resistor to the both ends which is well-known from axial and lopped resistor will not occur when using MPC resistors as the lead wires have a much smaller surface as the element and they are not lopped. This construction results in an steady thermal distribution over the element. The metalband element is housed in and hermetically closed ceramic case supporting the optimal thermal characteristics. Idle zones in the case are filled before shutting with special cement with ceramic powder.
Because of the steady heat dissipation over the complete case, there is the possibility to increase the rating capacity many times, when slipping over a suitable cooling cap over the resistor case.

Technical Data

MPS70
MPC76
MPC70
MPC78
MPC708
MPC75
MPC71
MPC74
MPC722
MPC725
MPC722
MPC723
1W
2W
2W
2W
2W+2W
5W
5W
5W
5W+5W
5W+5W
10W
10W
 
0,010 Ω
0,10 Ω
0,10 Ω
0,1+0,1 Ω
0,01 Ω
0,10 Ω
0,10 Ω
0,1+0,1 Ω
0,10 + 0,10 Ω
  
0,12 Ω
0,012 Ω
0,12 Ω
0,12 Ω
  
0,12 Ω
0,12 Ω
    
0,15 Ω
0,015 Ω
0,15 Ω
0,15 Ω
  
0,15 Ω
0,15 Ω
    
0,18 Ω
0,020 Ω
0,18 Ω
0,18 Ω
 
0,02 Ω
0,18 Ω
0,18 Ω
    
0,22 Ω
**0,027 Ω
0,22 Ω
0,22 Ω
0,22+0,22 Ω
 
0,22 Ω
0,24 Ω
0,22+0,22 Ω
0,22+0,22 Ω
  
  
0,24 Ω
0,24 Ω
  
0,24 Ω
0,22 Ω
    
 
0,030 Ω
0,27 Ω
0,27 Ω
 
0,03 Ω
0,27 Ω
0,27 Ω
    
0,33 Ω
**0,033 Ω
0,33 Ω
0,33 Ω
0,33+0,33 Ω
 
0,33 Ω
0,33 Ω
0,33+0,33 Ω
0,33+0,33 Ω
  
 
0,050 Ω
0,39 Ω
  
0,05 Ω
0,39 Ω
     
  
0,47 Ω
0,47 Ω
  
0,47 Ω
0,47 Ω
0,47+0,47 Ω
 
0,47 Ω
 
  
0,56 Ω
   
0,56 Ω
0,56 Ω
    
  
0,68 Ω
0,68 Ω
  
0,68 Ω
     
  
0,82 Ω
  
0,08 Ω
0,82 Ω
     
  
1,00 Ω
1,00 Ω
  
1,00 Ω
1,00 Ω
  
*1,00 Ω
 
     
1,20 Ω
    
*1,20 Ω
 
     
1,50 Ω
    
*1,50 Ω
 
          
*1,80 Ω
 
     
2,20 Ω
    
*2,20 Ω
 
          
*3,30 Ω
 
           
6,8 Ω

MPC725 inaktive wire for tests

MPC74 / MPC78 : low distortion and because of non-magnetic characteristics
these resistors show an excellent noise free behaviour especially for Audio application!


** Customer specific values, Delivery on inquiry



Tolerance:
± 10% (± 5% - not available for all values) * ± 5% Standard Tolerance
Temperature coefficient:
± 350ppm/°C
Operating temperature:
-25 to +200°C
Insulation resistance:
10 M Ohm

Dimensions

Type:
A:
B:
C:
RM:
d:
MPS70
8 ±1,0
13 ±1,0
4 ±0,5
9 ±1,0
0,6
MPC70 / 78/ 76
8 ±1,0
13 ±1,0
4 ±0,5
9 ±1,0
0,6
MPC71 / 74/ 75
18 ±1,0
14 ±1,0
5 ±0,5
9 ±1,0
0,6
MPC708 2x2W
10 ±1,0
26,5 ±1,0
5 ±0,5
10,0+10,0 ±1,0
0,6
MPC722 2x5W
17 ±1,0
26 ±1,0
5 ±0,5
10,0+10,0 ±1,0
1
MPC722 / 723 10W
18 ±1,0
26 ±1,0
5 ±0,5
20 ±1,0
0,8
MPC725 2x5W
17 ±1,0
26 ±1,0
5 ±0,5
10,0+10,0 ±1,0
0,8
 




a) left
straight leads
standard version MPC76 / MPC70 (2W) + MPC75 / MPC71 (5W)
b) right
kinked leads
special version MPC76 / MPC70 (2W) + MPC75 / MPC71 (5W)




version MPC722 10W




version MPC708 (2x2W) / 702 / 725 (2x5W)




taped version for MPC76 / MPC70 (2W)
Taping / Dimensions (PDF)
 

Testdata and absolute max. rates (MIL-R-11804)

Tests :
Test condition:
max. allowed deviation:
Rated load (normal)
+70°C / 1000 h
±1 %
Rated load (Humidity)
+40°C/1000 h/90-95%RH
±2 %
Temporary Overload:
3000 Volt DC
± 1 %
Soldering:
+350°C for 3 sec
± 0,5 %
Terminal load
5 kp
± 1 %

Comparison table

Criteria:
MPC-Type:
Axial Case
Dimensions for 2W
13(L) x 4(B) x 8(H)
ca. 5 Ø x 16(L)
Dimensions for 5W
14(L) x 5(B) x 18(H)
ca. 6 Ø x 22(L)
Smallest Pitch (2W)
9 mm
15 mm
Smallest Pitch (5W)
9 mm
25 mm
Necessity of confectioning the leadwires
no
yes
Assembly direcly on the PCB:
yes
no
Inductive Resistance:
minimal
yes
Temperature dissipation:
Steady on surface
Unsteady, Hotspot-Zone
Hermetical cap:
yes
no
Increase of power dissipation:
yes, by slipping over of a cooling case
no