Model: 4A28-25

Power Transformer

Properties:

Reliability Indicator
Not established
Overall Length
1.750 inches
Center To Center Distance Between Mounting Facilities Parallel To Length
1.250 inches single mounting facility single center group
Center To Center Distance Between Mounting Facilities Parallel To Width
1.000 inches single mounting facility single center group
Overall Height
1.560 inches
Frequency Rating
400.0 hertz single component
Input-output Phase Relationship
Single phase to single phase single component
Maximum Transformer Power Rating
25.0 volt-ampere single component
Body Width
1.500 inches
Maximum Operating Temp
130.0 degrees celsius
Inclosure Type
Fully enclosed
Mounting Facility Quantity
2 single group
Mounting Method
Threaded hole single group
Winding Function And Quantity
1 primary single component and 2 secondary single component
Thread Size
0.138 inches single group
Winding Operating Current
890.0 milliamperes ac single component all secondary
Winding Operating Voltage
115.00 ac volts single component single primary
Winding Operating Voltage
28.00 ac volts single component all secondary
Thread Series Designator
Unc single group
Terminal Type And Quantity
6 turret
NSN
5950-01-099-3702
Part Number
4A28-25
Description
Transformer,power
CAGE
58910

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 4A28-25 NSN 5950-01-099-3702

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:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.5000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

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: 8504314035
  • SITC: 77119
  • End Use: Generators, accessories
  • NAICS: 334416
  • USDA: 1

Freight Class: Transformers, having a power handling capacity less than 40 va, nesoi

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