Model: 749-6255

Non Wire Wound Variable Resistor

Properties:

Section Quantity
1
Body Style
Cylindrical servo mounted
Reliability Indicator
Not established
Pilot Diameter
1.3250 inches
Pilot Length
0.0620 inches
First Flat Length
0.375 inches
Flat Height
Between 0.211 inches and 0.221 inches
Undercut Diameter
1.285 inches
Undercut Width
0.0730 inches
Body Diameter
1.969 inches
Shaft Diameter
Between 0.2495 inches and 0.2499 inches
Shaft Length
Between 0.938 inches and 1.000 inches
Body Length
1.930 inches
Mounting Lip Diameter
1.4370 inches
Mounting Lip Depth
0.0930 inches
Shaft Style
Round, flatted
Switch Type
Rotary
Switch Voltage Rating In Volts
28.0
Actuator Type
Single shaft
Effective Electrical Rotation In Deg Angular Rotation
165.0
Nonturn Device Location
At 9 oclock
Nonturn Device Radius
0.531 inches
Switch Operating Position
Start of rotation
Switch Contact Arrangement
Double pole, double throw
Fragility Factor
Moderately rugged
Screw Thread Diameter
0.375 inches
Screw Thread Series Designator
Unef
Screw Thready Qty Per Inch (tpi)
32.0
Terminal Location
Rear-bottom
Mounting Method
Standard bushing
Features Provided
Switch
Electrical Resistance Per Section
20.0 kilohms single section
Rotary Actuator Travel In Angular Deg
170.0
Ambient Tempurature In Deg Celsius Per Section At Zero Percent Rated Power
105.0 single section
Power Dissipation Rating Per Section In Watts
1.7 free air single section
Resistance Tolerance Per Section In Percent
-10.0/+10.0 single section
Actuator Travel Control Feature
Spring
Tempurature Coefficient Of Resistance Wire Per Section In Ppm Per Deg Celsius
-20.0/+20.0 single section
Ambient Tempurature In Deg Celsius Per Section At Full Rated Power
40.0 single section
Switch Current Type And Rating In Amps
2.000 dc
Standard Taper Curve Per Section
A single section
Test Data Document
49956-2889692 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
9 turret
NSN
5905-01-030-2864
Part Number
749-6255
Description
Resistor,variable,wire Wound,non
CAGE

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), if given, of the output is greater than plus of minus 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, precision.

Part 749-6255 NSN 5905-01-030-2864

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
37406
FIIG:
A002A0
Concept No.:
1
App. Key:
A
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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.3000lbs
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:
72D
TCC:
Z
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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