product guide
PRECISION WIREWOUND
PRINTED CIRCUIT LEAD SERIES
CONSTRUCTION:
Controlled stress windings are reverse pi wound (non-inductive) on special high temperature epoxy bobbins and terminated using controlled welds. An extensive accelerated aging program provides the ultimate in stabilization. A resilient inner coating and dry air chamber isolate exterior protective epoxy shell from windings to increase moisture protection and stability. Leads are firmly anchored inside bobbin with a high temperature epoxy that assures excellent structural strength. Standard marking includes Trademark, part number, resistance value and resistance tolerance.
FEATURES:
Resistance Tolerances: To ±.005% (25°C)  
Temperature Range: -65°C to 150°C
Temperature coefficients of resistance to 0 ±1PPM/°C
Exceptional resistance stability.
All terminations made of controlled welds.
Fast rise time and minimum phase shift available on selected styles.
Extremely low noise.
Temperature range: -65°C to 150°C
New micro-miniature sizes available.
Marking impervious to most cleaning agents
Exceed the applicable requirements of Mil-R-93.
STANDARD TOLERANCES:
1%, 0.5%, 0.25%, 0.1%, 0.05%, 0.01% and 0.005% of marked resistance value (calibrated at +25°C ±1°C) Special tolerances are available on request.
STANDARD LEAD MATERIAL:
Tinned Copper
Measurements are made with equipment calibrated to the absolute ohm standard. Since electrical limitations exist in terminating resistance wire, there are minimum tolerance limits applicable to vari.ous resistance ranges. These tolerances with corresponding resistance values as shown below

Tolerance (%) Resistance Value Tolerance (%) Resistance Value
0 ± .005 1000 and over 0 ± .01 50 and over
0 ± .05 5 and over 0 ± .10 1 and over
0 ± .25 .05 and over - - - - - -
Standard Temperature Coefficient of Resistance
PPM/° C Resistance   PPM/° C Resistance
0 ± 10 1000 and over 0 ± 15 10 to 100
0 ± 30 1 to 10 0 ± 90 less than 1
For resistance values higher than shown please contact our engineering department.

Dimension Shown in Inches. Conversion to M.M. = Inch x 25.4
M-O PN Mil R-93 Equiv. Length
(L) ±.032		 Dia.
(D) ±.032		 Lead Awg
(d)		 Lead
Spacing
(S) ±.010		 Com'l Wattage Max.DC Voltage Max
Resistance
.0006 wire
440 -- .250 .125 24 .050 .10 100 120K
412 -- .375 .125 24 .050 .125 200 55K
413 -- .312 .160 24 .080 .15 150 300K
414 -- .312 .187 22 .100 .20 200 300K
435 -- .375 .187 22 .100 .25 300 300K
415 RB71 .312 .250 22 .200 .25 300 500K
416 -- .375 .250 22 .200 .25 300 800K
443 -- .500 .250 22 .125 .30 300 1M
437 -- .750 .250 22 .125 .50 300 1M
417 RB70 .500 .375 20 .200 .50 300 1.5M
436 -- .610 .375 20 .250 .50 450 3M
438 -- 1.00 .375 20 .250 1.00 750 5M
434 -- .500 .500 20 .300 .50 300 3M
405 -- .155 .075 30 .030 .04 50 11K
430 -- .312 .093 28 .040 .05 100 50K
401 -- .175 .105 28 .040 .05 75 30K
442 -- .185 .120 28 .050 .05 100 30K
441 -- .160 .125 28 .050 .05 100 30K
For resistance values higher than shown please contact our engineering department.
ORDERING INFORMATION
Example: .25W 100ohm 5ppm .1%
415
100R0
C7
B
Type
Resistance
5 digit <100 ohm use R for decimal. >100 ohm 5th digit is multiplier.
T.C.
C3 = 25
C6 = 10
C7 = 5
C8 = 1
Tolerance
F= 1%
D = .5%
C = .25%
B = .1%
A = .05%
Q = .02%
T = .01%
V = .005%
TO ORDER PRODUCTS
E mail: microohm@mail.com
Call Toll Free: 1-800-845-5167
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