MT Series

Lo-Ohm Power Resistors
Ideal for Current Sensing Applications
Low Inductance: Typically 7 nH
Resistance from 0.003 to 0.3 Ohms
D8
Standard Resistance Tolerance to ±1%
Superior Thermal Shock and Moisture Resistance
MIL-R-49465
Riedon’s Lo-Ohm resistors are ideal for current sensing applications in test instruments, power
amplifiers, and switching and linear power supplies. These resistors are transfer-molded in a high
temperature resin, providing a high power dissipation to size characteristic. This construction also
provides superior thermal shock and moisture resistance. The encapsulation will not peel, flake or
deteriorate with commonly used cleaning solvents including Freon, and aqueous cleaning. Custom
designs are available for special applications.
Wattage
Rating
A
±.020"
D
±.020"
C
±.020"
D
AWG*
MT-1A
1
0.430
0.120
0.590
22
MT-2B
3
0.580
0.200
0.665
20
MT-2C
3
0.500
0.250
0.625
20
MT-3
4
0.600
0.250
0.675
20
MT-4
4.5
0.750
0.250
0.750
18
MT-5
5
0.890
0.335
0.820
18
MT-6
6
1.055
0.395
0.903
18
10
1.925
0.475
1.338
18
MT-10
1.50” MIN.
TINNED
COPPER
LEADS
A
D
d
C
C
Terminal Strength: 10 lb. pull test
Solderability: Per MIL-STD-202, Method 208
* Lead Diameter: 18 AWG = 0.040"; 20 AWG = 0.032"; 22 AWG = 0.25"
Resistance Range: 0.003 to 0.3 ohms. Consult factory for extended resistance values
Standard Resistance Tolerances: ±1%, ±2, ±3%, ±5%. Tighter tolerances are available.
Temperature Coefficient of Resistance: (See chart)
Dielectric Strength: 1000 VAC (except 500 VAC for MT-1A)
Insulation Resistance: 10,000 Megohms (dry)
Short Term Overload: 5 seconds at 5 times rated power
Inductance: 7 nH (typical for resistances of 0.055 to 0.1 ohms)
Temperature Coefficient of Resistance
500
Power Derating
% OF RATED POWER
7
Type
TEMPERATURE COEFFICIENT
(PPM/°C)
Power
SPECIFICATIONS
400
300
200
120
100
80
60
40
20
0
100
.01 .03 .05 .07 .09 .11 .13 .15 .20
RESISTANCE IN OHMS
25
75
125
175
225
275
AMBIENT TEMPERATURE °C
350