Model: 7990

Nonwire Wound Variable Resistor

Properties:

Section Quantity
1
Body Style
Cylindrical bushing mounted
Reliability Indicator
Not established
Overall Length
1.590 inches
Body Diameter
0.500 inches
Shaft Diameter
Between 0.124 inches and 0.126 inches
Shaft Length
0.870 inches
Mounting Bushing Length
0.250 inches
Body Length
0.470 inches
Overall Diameter
0.940 inches
Shaft Style
Round, slotted
Switch Type
Rotary
Switch Voltage Rating In Volts
125.0 and 28.0
Actuator Type
Single shaft
Effective Electrical Rotation In Deg Angular Rotation
275.0
Maximum Starting Torque
8.00 inch-ounces
Maximum Running Torque
0.50 inch-ounces
Maximum Stop Torque
64.00 inch-ounces
Nonturn Device Location
At 3 oclock
Nonturn Device Radius
0.245 inches
Mechanical Backlash In Deg Angular Rotation
3.0
Switch Operating Position
End of rotation
Switch Contact Arrangement
Single pole, single throw, normally closed
Screw Thread Diameter
0.250 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
2.5 kilohms single section
Rotary Actuator Travel In Angular Deg
295.0
Resistance Tempurature Characteristic Range Per Section In Percent
-0.0/+6.9 -55 degrees celsius single section and -0.0/+3.8 -25 degrees celsius single section and -0.0/+1.9 0 degrees celsius single section and -0.0/+0.0 25 degrees celsius single section and -2.5/+2.5 85 degrees celsius single section and -0.0/+5.6 120 degrees celsius single section
Resistance Tempurature Characteristic Range Per Section In Percent
-0.0 to 6.9 -55 degrees celsius single section and -0.0 to 3.8 -25 degrees celsius single section and -0.0 to 1.9 0 degrees celsius single section and -0.0 to 0.0 25 degrees celsius single section and -2.5 to 2.5 85 degrees celsius single section and -0.0 to 5.6 120 degrees celsius single section
Ambient Tempurature In Deg Celsius Per Section At Zero Percent Rated Power
120.0 single section
Power Dissipation Rating Per Section In Watts
0.25 free air single section
Resistance Tolerance Per Section In Percent
-20.0/+20.0 single section
Resistance Tolerance Per Section In Percent
-20.0 to 20.0 single section
Actuator Travel Control Feature
Stops
Ambient Tempurature In Deg Celsius Per Section At Full Rated Power
70.0 single section
Switch Current Type And Rating In Amps
1.500 ac
Standard Taper Curve Per Section
A single section
Terminal Type And Quantity
2 tab, solder lug
NSN
5905-00-434-1686
Part Number
7990
Description
Resistor,variable,nonwire Wound,
CAGE
01121

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 or 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, wire wound, nonprecision; resistor (1), variable, nonwire wound precision; and resistor (1), variable, wire wound, precision.

Part 7990 NSN 5905-00-434-1686

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
37405
FIIG:
A002A0
Concept No.:
1
App. Key:
B
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:
0.1000lbs
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: 8533400080
  • SITC: 77235
  • End Use: Electric apparatus
  • NAICS: 334416
  • USDA: 1

Freight Class: Variable resistors, including potentiometers, nesoi

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