Rheostats


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Wire Wound Rheostats - Open Type

Code: ETMRH0001

A Rheostat is used to raise or lower the resistance of a circuit and correspondingly to decrease or increase the current following. Our Rheostat are manufactured in a very wide range. which are being used in electronic industries, schools, collages laboratories over decades. A wide range of Rheostat are available depending on current and resistance ratings which can be selected from the below table. Customized designing available on request like Double Tube, Hexagonal Tube, Closed Type etc. Higher wattage resistors for special applications can be made.



RHEOSTAT - 4.3CM DIA TUBE WOUND WITH HEAVILY OXIDIZED EUREKA WIRE

S.No. Tube Length ETMRH 0001 ETMRH 0004 ETMRH 0007 ETMRH 0010 ETMRH 0013 ETMRH 0016 ETMRH 0019 ETMRH 0022
Amps 15cm 20cm 25cm 30cm 35cm 40cm 45cm 50cm
a 6.9 3 4.4  6 7 9 10.5 12 13
b 5 4.5 6.5 9 11 13 15 18 20
c 4.2 8 12 16 20 24 28 32 36
d 3.3 10 16 22 28 34 40 46 52
e 2.8 15 22 29 36 43 50 58 65
f 2.3 23 34 45 56 68 80 92 104
g 1.8 37 55 73 91 110 128 146 164
h 1.6 50 75 100 125 150 175 200 225
i 1.4 64 96 128 160 190 220 250 290
j 1.2 89 135 180 225 270 315 355 395
k 1.0 116 175 235 290 350 405 460 515
l 0.8 160 240 320 400 480 560 640 720
m 0.6 270 400 540 670 800 930 1070 1200
n 0.5 400 600 800 1000 1200 1400 1600 1800
o 0.4 660 975 1300 1625 1950 2275 2640 2940
p 0.3 1150 1700 2250 2850 3400 3950 4550 5150
RHEOSTAT - 5.6CM DIA TUBE WOUND WITH HEAVILY OXIDIZED EUREKA WIRE

Order Code Tube Length ETMRH 0025 ETMRH 0028 ETMRH 0031 ETMRH 0034 ETMRH 0037 ETMRH 0040 ETMRH 0043 ETMRH 0046
S.No Amps 15cm 20cm 25cm 30cm 35cm 40cm 45cm 50cm
a 5.0 4.5 8 11 14 17 20 23 26
b 4.2 10 15 20 25 30 35 40 45
c 3.3 14 20 28 34 42 48 58 64
d 2.8 19 28 38 48 57 66 76 86
e 2.3 26 41 56 71 86 102 114 128
f 1.8 47 70 93 116 139 160 185 210
g 1.6 64 96 125 160 190 225 250 290
h 1.4 82 120 160 200 245 285 325 360
i 1.2 115 170 230 290 345 400 450 500
j 1.0 148 225 295 365 445 520 590 675
k 0.8 200 300 400 500 600 700 800 925
l 0.6 345 510 675 835 1000 1165 1335 1500
m 0.5 500 750 1000 1250 1500 1800 2050 2300
n 0.4 840 1200 1650 2070 2500 2900 3350 3750
o 0.3 1350 2100 2850 3600 4380 5100 6000 6750

Wire Wound Rheostats Close Type

Code: ETMRH0049

Layers of electrically oxidized Eureka wire are wound on an insulated heat resistant porcelain tube. The tube is mounted on cast Aluminium supports on each side with rod and nuts. A Brass guide rod is tightened with screws to the projection of the supports. The slider, which moves along the guide rod, has a double contact system and is fitted with a Phosphor-Bronze contact. Three terminals are provided, one connected to the sliding contact and the other two connected to the end windings. The resistance and current values are marked on the slider. The length of the tube varies according to the resistance required.
Order Code : Tube Length ETMRH 0049 ETMRH 0052 ETMRH 0055 ETMRH 0058 ETMRH 0061 ETMRH 0064 ETMRH 0067 ETMRH 0070
S.No. Amps 15cm 20cm 25cm 30cm 35cm 40cm 45cm 50cm
a 10.0 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5
b 9.0 2 3 4.5 5.5 7 8 9 10
c 8.0 3.5 5 7 8 9 10.5 12 13
d 7.5 3.7 5.7 7.7 9.7 11.5 13.5 15.5 17.5
e 6.0 5 7.5 10 12 14 16 18 20
f 5.5 6 8 11 14 17 20 23 26
g 5.0 7 11 15 19 23 27 31 35
h 4.2 10 15 20 25 30 35 40 45
i 3.3 14 20 28 34 42 48 57 66
j 2.8 19 28 38 48 57 66 76 86
k 2.3 26 42 56 70 86 100 114 128
l 2.0 40 60 80 100 120 140 160 180
m 1.8 64 96 125 160 190 225 250 290
n 1.6 85 130 150 210 225 300 340 380
o 1.4 115 170 230 290 340 400 450 500
p 1.2 150 225 295 365 445 520 590 670
q 1.0 200 300 400 500 600 700 800 900
r 0.8 340 510 675 835 1000 1165 1340 1500
s 0.6 500 750 1000 1250 1500 1750 2000 2250
t 0.5 650 1060 1340 1680 2000 2350 2730 3000
u 0.4 840 1250 1650 2050 2500 2900 3350 3750
v 0.3 1300 1950 2600 3260 3900 4600 5300 6000
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