Model: 300WS278

Pre Wire Wound Variable Resistor

Special Features:

Sections 1, 4, and 5 each have a 5k ohm wiper load; sections 2, 6, and 7 each have a resistance element located across the tap

Properties:

Section Quantity
7
Body Style
Cylindrical servo mounted
Reliability Indicator
Not established
Pilot Diameter
2.8750 inches
Pilot Length
0.0620 inches
Overall Length
5.250 inches
Undercut Diameter
2.875 inches
Undercut Width
0.0730 inches
Body Diameter
3.031 inches
Shaft Diameter
Between 0.2494 inches and 0.2497 inches
Shaft Length
0.625 inches
Body Length
4.500 inches
Mounting Lip Diameter
3.0000 inches
Mounting Lip Depth
0.0930 inches
Shaft Style
Round, slotted
Shaft Bearing Type
Ball
Actuator Type
Double ended shaft
Effective Electrical Rotation In Deg Angular Rotation
358.0
Maximum Starting Torque
5.90 inch-ounces
Maximum Running Torque
3.60 inch-ounces
Shaft End Play
0.0025 inches
Shaft Runout
0.001 inches
Terminal Location
Radially positioned over less than half the circumference
Mounting Method
Clamp ring
Features Provided
Humidity proof
Electrical Resistance Per Section
5.0 kilohms all sections
Tap Location From Ccw Terminal Per Section In Deg Of Effective Electrical Rotation
0.0 7th section
Tap Location From Ccw Terminal Per Section In Deg Of Effective Electrical Rotation
345.0 2nd section
Tap Location From Ccw Terminal Per Section In Deg Of Effective Electrical Rotation
345.0 6th section
Rotary Actuator Travel In Angular Deg
360.0
Function Conformity Tolerance Per Section
-0.25/+0.25 6th section
Function Conformity Tolerance Per Section
-0.50/+0.50 2nd section
Function Conformity Tolerance Per Section
-0.50/+0.50 3rd section
Function Conformity Tolerance Per Section
-0.50/+0.50 7th section
Function Conformity Tolerance Per Section
-1.00/+1.00 1st section
Function Conformity Tolerance Per Section
-1.00/+1.00 4th section
Function Conformity Tolerance Per Section
-1.00/+1.00 5th section
Ambient Tempurature In Deg Celsius Per Section At Zero Percent Rated Power
125.0 all sections
Tempurature Coefficient Of Resistance Per Section In Ppm Per Deg Celsius
-150.0/+150.0 all sections
Power Dissipation Rating Per Section In Watts
2.0 free air all sections
Function Conformity Per Section
All sections absolute conformity
Fixed Tap Quantity Per Section
1 2nd section
Fixed Tap Quantity Per Section
1 6th section
Fixed Tap Quantity Per Section
1 7th section
Resistance Tolerance Per Section In Percent
-1.0/+1.0 3rd section
Resistance Tolerance Per Section In Percent
-5.0/+5.0 1st section
Resistance Tolerance Per Section In Percent
-5.0/+5.0 2nd section
Resistance Tolerance Per Section In Percent
-5.0/+5.0 4th section
Resistance Tolerance Per Section In Percent
-5.0/+5.0 5th section
Resistance Tolerance Per Section In Percent
-5.0/+5.0 6th section
Resistance Tolerance Per Section In Percent
-5.0/+5.0 7th section
Actuator Travel Control Feature
Continuous motion
Function Characteristic Per Section
10 oclock 12th primary
Function Characteristic Per Section
11 oclock 5th primary
Function Characteristic Per Section
12 oclock 12th primary
Function Characteristic Per Section
8 oclock all primaries
Function Characteristic Per Section
9 oclock 12th primary
Function Characteristic Per Section
Cold rolled 12th primary
Function Characteristic Per Section
Drawn and pickled 12th primary
Ambient Tempurature In Deg Celsius Per Section At Full Rated Power
40.0 all sections
Precious Material And Location
Terminal surfaces gold
Precious Material
Gold
Test Data Document
10001-2552844 drawing (this is the basic governing drawing, such as a contractor drawing, original equipment manufacturer drawing, etc.; excludes any specification, standard or other document that may be referenced in a basic governing drawing)
Terminal Type And Quantity
24 tab, solder lug
NSN
5905-00-231-3858
Part Number
300WS278
Description
Resistor,variable,wire Wound,pre
CAGE
08815

A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. The functional tolerance (linearity) of the output is equal to or less than plus or munus 1 percent on linear outputs. Specified outputs such as sine, cosine, tangent, etc., shall be considered to be precision. For items having manually positioned taps designed to be set and fixed prior to use, see resistor, adjustable, for items with step by step variation, see rheostat and resistor, step by step. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see attenuator, variable. Excludes resistor (1), variable, nonwire wound, nonprecision; resistor (1), variable, nonwire wound, precision; and resistor (1), variable, wire wound, nonprecision.

Part 300WS278 NSN 5905-00-231-3858

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
37408
FIIG:
A002A0
Concept No.:
1
App. Key:
D
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
G
ESD:
B
ESD:
B
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.4000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
ZZ
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
062960
UFC:
35140
LTL:
77.5
LCL:
--
WCC:
658
TCC:
3
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8533390080
  • SITC: 77233
  • End Use: Electric apparatus
  • NAICS: 334416
  • USDA: 1

Freight Class: Wirewound variable resistors, nesoi

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