product guide
Ultra Low Ohm Metal Alloy Current Sensing Resistor
1W, 2W, 2.5W & 3W Type MA12
±1% to ±5%
Features:
Ultra low ohmic values. 0.5m ohm to 22m ohm
TCR from ±50ppm to ±100ppm
High current capacity to 77.5 amps
1, 2, 2.5 & 3W in 2512 package
Resistance tolerances: 1%~ 5%
Low inductance
Applications:
Automobile engine controls, battery pack chargers, switching power supplies, AC/DC conversion
Dimensions (mm) Tol ±.30
Case Size L W T
1w & 2w		 T
3w		 D
2512 6.50 3.2 .05 1.0 1.5
Electrical Specifications:
Wattage
80°C		 Resistance
Range mΩ		 Operating
Temp. 		Max.
Operating Voltage		 Max. Overload
Voltage		 Resistance
Tolerance 		Temp. Coefficient Resistance mΩ
1W 0.5 ~22 -55 ~+170°C. 200V 400V ±1% ~ 5%
mΩ
ppm/ ºC
.5~2.0
100
2.5~10.0
50
See factory for
special TCR
2W
0.7 ~10.0
2.5W
0.4 ~0.6
3W
0.5 ~3.0
Operating Current I = √(P/R), Operating Voltage V = (PxR)

Environmental Characteristics:
Item Specification
Test Method
1
Temperature Coefficient of Resistance
 As Spec MIL-STD-202 Method 304
+25/-30/+25/+125/+25°C.
2
Thermal Shock
 ±0.5% + 0.5m MIL-STD-202 Method 107G
-55°C~150°C, 100 cycles
3
Short Time Overload
 ±0.5% + 0.5m JIS-C-5202-5.5
RCWV 2.5or Max Overload Voltage
5seconda
4
Resistance to Dry Heat
 ±1% + 0.5m JIS-C-5202-7.2
96 hours @ +125°C without load
5
Load Life
 ±1% + 0.5m) MIL-STD-202F Method 108
RCWV 70°C 1.5 hours on, 0.5 hours off
1000~1048 hours
6
Resistance to Solderimng Heat
 ±0.5% + 0.5m MIL-STD-202F Method 210E
260±5°C, 10 ±1second
7
Solderability
 95% min. coverage MIL-STD-202F Method 208H
235°C ±5°C, 2±0.5 second

Emboss Plastic Tape Specifications
Symbol Ao Bo Ko Po P1 P2 T
Spec. 3.40±0.1 6.75±0.1 0.80±0.1 4.0±0.1 4.0±0.1 2.0±0.05 6.75±0.1
Symbol E F
Do
D1
W
10Po
Spec. 1.75±0.1 5.5±0.05 1.55±0.05 1.5 (min)
12.0±0.3
40.0±0.2

Packaging Quantity
How To Order:
Example: 1W .002 5% 100ppm T/R
TO ORDER PRODUCT
E mail: microohm@mail.com
Call Toll Free: 1-800-845-5167

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