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H.E.I. Adjustable Resistors are constructed with steatite ceramic cores and terminated with welded terminals and wound with the finest alloy resistance wires welded to the terminals. Our special formula of vitreous enamel (AVT) or silicone (AST) coatings are then used to insulate the resistors. A section of the windings are made bare for connecting to a band terminal that implements the adjustment function. This construction insures long life, durability, and reliability.
AVT AST
ADJUSTABLE WIREWOUND RESISTORS
12 WATTS THRU 225 WATTS
A wide variety of special resistor core sizes are available. Any tapped, combination fixed and adjustable can be made to custom specifications, including tolerance, brackets, and terminals. TYPE AVT-10 AVT-25 AVT-25A AVT-25B AVT-50 AVT-50A AVT-50B AVT-75 AVT-75A AVT-100 AVT-130 AVT-160 AVT-200 WATT 12 25 30 30 50 60 70 75 90 100 130 175 225 A
TYP
B
+/-.032(0.8)
C
+/-.032(0.8)
D
+/-.032(0.8)
E
TYP
F
TYP
G
TYP
H
TYP
K
TYP
M
TYP
N 6-32 8-32 10-32 8-32 8-32 10-32 10-32 8-32 10-32 10-32 10-32 10-32 10-32
.31 (7.9) .56 (14.2) .75 (19) .63 (16) .56 (14.2) .75 (19) .75 (19) .56 (14.2) .75 (19) .75 (19) 1.13 (28.7) 1.13 (28.7) 1.13 (28.7)
.19 (4.8) .31 (7.9) .50 (12.7) .45 (11.4) .31 (7.9) .50 (12.7) .55 (14) .31 (7.9) .50 (12.7) .50 (12.7) .75 (19) .75 (19) .75 (19)
1.75 (44.5) 2.00 (50.8) 2.00 (50.8) 2.00 (50.8) 4.00 (102) 4.00 (102) 4.50 (114) 6.00 (152) 6.00 (152) 6.50 (165) 6.50 (165) 8.50 (216) 10.50 (267)
.19 (4.8) .25 (6.4) .25 (6.4) .25 (6.4) .25 (6.4) .25 (6.4) .25 (6.4) .25 (6.4) .25 (6.4) .25 (6.4) .31 (7.9) .31 (7.9) .31 (7.9)
.44 (11.2) .56 (14.2) .56 (14.2) .56 (14.2) .56 (14.2) .56 (14.2) .56 (14.2) .56 (14.2) .56 (14.2) .56 (14.2) .63 (16) .63 (16) .63 (16)
.10 (2.5) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .20 (5.1) .20 (5.1)
.50 (12.7) .69 (17.5) .69 (17.5) .69 (17.5) .69 (17.5) .69 (17.5) .69 (17.5) .69 (17.5) .69 (17.5) .69 (17.5) .88 (22.4) .88 (22.4) .88 (22.4)
.10 (2.5) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3) .17 (4.3)
.94 (23.9) 1.69 (42.9) 2.31 (58.7) 1.69 (42.9) 1.69 (42.9) 2.31 (58.7) 2.31 (58.7) 1.69 (42.9) 2.31 (58.7) 2.31 (58.7) 2.81 (71.4) 2.81 (71.4) 2.81 (71.4)
2.19 (55.6) 2.75 (69.8) 2.88 (73.2) 2.63 (66.8) 4.75 (121) 4.88 (124) 5.38 (137) 6.75 (171) 6.88 (175) 7.38 (187) 7.38 (187) 9.38 (238) 11.38 (289)
AVT - VITREOUS
AST - SILICONE
inches (mm)
ORDER INFORMATION
RESISTANCE VALUE CHART
.10 .13 .15 .20 .25 .30 .33 .50 .75 1.0 1.5 2.0 3.0 4.0 5.0 7.5 10 12 15 18 20 22 25 27 30 33 35 39 40 47 50 56 68 75 82 100 120 125 150 180 125 150 180 200 220 225 250 270 300 330 350 390 400 470 500 560 600 680 700 750 800 820 900 1.0K 1.1K 1.2K 1.5K 1.8K 2.0K 2.2K 2.5K 2.7K 3.0K 3.5K 3.9K 4.0K 4.7K 5.0K 5.6K 6.0K 6.8K 7.5K 8.0K 8.2K 10.0K 12.5K 15.0K 20.0K
AVTK - 10 - 250 - QC - BKTS
POWER TYPE RESISTANCE ADD FOR V=VITREOUS INCLUDE FOR QUICK S=SILICON TOLERANCE(K=10%) CONNECT ADD FOR STANDARD BRACKETS
OPTIONAL FEATURES AVAILABLE
RESISTANCE TOLERANCE: Standard tolerance is 10%. Available Tolerances: F = 1%, J = 5%, K = 10% MOUNTING BRACKETS: Push-in friction grip mounting brackets are available as shown above. When required, add "BKTS" to the part number. QUICK CONNECT TERMINALS: Resistors with a core O.D. of 9/16 or 3/4 inch can be supplied with Quick Connect Terminals except the adjustable band. As "QC" to the part number as shown.
100
WATTAGE DERATING CHART FOR HIGHER AMBIENT TEMPERATURES % RATED LOAD
0 25 50
25
50
75
100
150
200
250
300
350
AMBIENT TEMP. CL
HUNTINGTON ELECTRIC, INC. 1 P.O. BOX 366 1 HUNTINGTON, IN 46750 1 (260) 356-0756 1 www.heiresistors.com

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