Co d e C o Co r p o r a t i o n o f Ve r m o n t

Series: WP Ultra-Precision Wirewound Resistors

VPR's ultra-precision resistors should be used wherever there is a requirement for extremely tight

tolerances, temperature coefcients or a combination of both. These resistors are wound on

bobbins of molded epoxy with a single strand of nickel-chromium wire. This wire has no soldered

or welded splices that will cause problems after the circuit is in the eld. All parts are wound on

reversed bi-segmented bobbins to eliminate any possible inductance.

Tension is controlled and kept to a minimum while the winding process takes place to keep out

any possible fatigue problems. The windings are then relieved of stresses by extensive aging

before calibration and termination operations. The resistors are then given a silicon buffer coat

before the nal epoxy molding occurs, resulting in a case size that is extremely consistant from

part to part. Marking is then done alpha-numerically with a type of epoxy ink that will withstand

any of the cleaning or degreasing solvents. All WP series parts are RoHS compliant.

Axial Lead Subminiature Series

Lead Lengths: 1.5" Minimum

Standard Tolerances: 1%, 0.5%, 0.25%, 0.1%, 0.05%, 0.025%, 0.01%, 0.005%

Temperature Coefcients: 100Ω and up: ±10PPM/°C

10Ω to 100Ω: ±20PPM/°C

Below 10Ω: ±30PPM/°C

Type Minimum Power Maximum Diameter Length Maximum Lead

Tolerance (Watts) Resistance ±.005" ±.025" Voltage (AWG)

SWP-2 0.1% .06 50K .100 .210 75 0.020

SWP-3 0.05% .08 150K .125 .260 100 .020/.025

SWP-4 0.05% .10 250K .125 .375 100 0.020

SWP-5 0.01% .12 400K .187 .250 150 0.025

SWP-6 0.01% .15 500K .187 .295 150 0.025

SWP-7 0.005% .25 1 Meg .210 .465 250 0.025

SWP-12 0.005% .20 750K .187 .450 200 0.025

SWP-13 0.05% .10 250K .156 .312 100 0.020

SWP-15 0.005% .175 750K .187 .375 200 0.025

Codeco Corporation of Vermont

West Hill Road, P.O. Box 1207

Stowe, Vermont 05672-1207

Toll Free: 866-255-8567

Telephone: 802-253-8567

Fax: 802-253-8019

Page 22

Co d e C o Co r p o r a t i o n o f Ve r m o n t

Axial Lead Series 100

Type Power Maximum Diameter Length Maximum Lead

(Watts) Resistance ±.005" ±.025" Voltage (AWG)

WP-100 0.20 800K .250 .375 200 #20 or #22

WP-101 0.25 1.2 Meg .250 .500 300 #20 or #22

WP-102 0.33 2.5 Meg .250 .750 400 #20 or #22

WP-103 0.50 7.5 Meg .375 .885 400 #20

WP-104 0.50 7.0 Meg .500 .500 400 #20

WP-105 0.60 7.0 Meg .500 .625 400 #20

WP-106 1.00 12.0 Meg .500 1.000 800 #20

WP-107 1.50 15.0 Meg .500 1.500 900 #20

WP-108 2.00 25.0 Meg .500 2.000 1000 #20

WP-120 0.40 3.8 Meg .375 .500 300 #20

WP-121 0.50 6.0 Meg .375 .750 400 #20

WP-129 0.75 10.0 Meg .375 1.000 600 #20

WP-139A 0.15 500K .250 .250 100 #22

WP-153 1.75 15.0 Meg .500 1.750 900 #20

Printed Circuit Board Series

(Radial Leads)

Type Power Maximum Diameter Height Maximum Lead Lead

(Watts) Resistance ±.005" ±.025" Voltage Spacing Size

PWP-100 .125 500K .250 .375 150 .150 .025

PWP-101 .25 600K .250 .500 150 .150 .025

PWP-104 .50 1 Meg .500 .500 400 .300 .032

PWP-120 .50 800K .375 .500 300 .200 .032

PWP-130 .125 500K .250 .312 150 .150 .025

PWP-131 .125 500K .250 .312 150 .200 .025

Lead Length: 1" Minimum

Tolerances and TCs are the same as those shown for the SWP series.

Lead Length: 1.5" Minimum