Model: ST28850

Power Transformer

Special Features:

One primary winding; seven secondary windings with the 2nd and 7th winding center tapped and the 6th winding multiple tapped w/o center tap

Properties:

Reliability Indicator
Not established
Center To Center Distance Between Mounting Facilities Parallel To Length
4.250 inches single mounting facility single center group
Center To Center Distance Between Mounting Facilities Parallel To Width
3.500 inches single mounting facility single center group
Frequency Rating
400.0 hertz single component
Input-output Phase Relationship
Single phase to single phase single component
Maximum Transformer Power Rating
284.4 volt-ampere single component
Winding Shielding Method
Internal shield grounded to core and brought out to terminal single component
Body Length
Between 4.870 inches and 5.000 inches
Body Width
Between 4.120 inches and 4.250 inches
Body Height
Between 4.620 inches and 4.750 inches
Maximum Operating Temp
130.0 degrees celsius
Inclosure Type
Hermetically sealed
Mounting Facility Quantity
4 single group
Mounting Method
Threaded hole single group
Winding Function And Quantity
1 primary single component and 7 secondary single component
Thread Size
0.250 inches single group
Winding Operating Current
110.0 milliamperes ac single component 4th secondary
Winding Operating Current
5.0 milliamperes ac single component 1st secondary
Winding Operating Current
5.0 milliamperes ac single component 3rd secondary
Winding Operating Current
300.0 milliamperes ac single component 2nd secondary
Winding Power Rating
13.0 volts-amperes single component 1st secondary
Winding Power Rating
13.0 volts-amperes single component 3rd secondary
Winding Power Rating
156.8 volts-amperes single component 4th secondary
Winding Power Rating
2.0 volts-amperes single component 2nd secondary
Winding Operating Voltage
110.00 ac volts single component single primary and 115.00 ac volts single component single primary and 120.00 ac volts single component single primary
Winding Operating Voltage
1.425 ac kilovolts single component 4th secondary
Winding Operating Voltage
2.60 ac kilovolts single component 1st secondary
Winding Operating Voltage
2.60 ac kilovolts single component 3rd secondary
Winding Operating Voltage
6.50 ac volts single component 2nd secondary
Thread Series Designator
Unc single group
Terminal Type And Quantity
23 solder stud
NSN
5950-00-932-6794
Part Number
ST28850
Description
Transformer,power
CAGE
97102

A transformer consisting of one or more primary winding(s) and one or more secondary winding(s). It may be designed for direct connection to an alternating current source for purposes of changing the secondary volts and amperes or designed to eliminate metallic interconnection between circuits in an overall one to one voltage ratio, with or without additional output windings, or items designed to automatically maintain a constant output voltage within specified limits under varying input or load conditions. Also includes items having a provision for mechanically changing the turns ratio or inductive coupling in progressive increments by means of voltage taps, ratio adjuster, or devices oe similar design. For transformers having winding(s) common to both input and output circuits, see transformer (1), power, autotransformer. Excludes transformer (1), pulse.

Part ST28850 NSN 5950-00-932-6794

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
32496
FIIG:
A058B0
Concept No.:
1
App. Key:
J
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
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:
M
SPI No.:
D149335002
SPI Rev.:
SPC Mkg:
ZZ
LVL_A:
Z
LVL_B:

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
063420
UFC:
35355
LTL:
RATING VARIABLE
LCL:
--
WCC:
595
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8504314065
  • SITC: 77119
  • End Use: Generators, accessories
  • NAICS: 334416
  • USDA: 1

Freight Class: Transformers, having a power handling capacity 40 va or greater but less than 1 kva, nesoi

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