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P8391 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The TRANSFORMER,POWER is a the manufacturer industrial component. Key specifications include body_width: 1.375 INCHES NOMINAL IN, body_height: 1.375 INCHES NOMINAL IN, body_length: 2.375 INCHES NOMINAL IN, inclosure_type: OPEN, mounting_method: FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP, frequency_rating: 50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM SINGLE COMPONENT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-345-7474, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
P8391
NSN: 5950-00-345-7474
FSC: 5950
CAGE: 80089 — EMERSON ELECTRIC CO WHITE-RODGERS DIV (USA)
SPECIFICATIONS
body_width1.375 INCHES NOMINAL IN
body_height1.375 INCHES NOMINAL IN
body_length2.375 INCHES NOMINAL IN
inclosure_typeOPEN
mounting_methodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
frequency_rating50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM SINGLE COMPONENT
winding_power_rating4.2 VOLTS-AMPERES SINGLE COMPONENT SINGLE SECONDARY
reliability_indicatorNOT ESTABLISHED
mounting_hole_diameter0.188 INCHES NOMINAL SINGLE GROUP IN
winding_operating_current350.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
winding_operating_voltage117.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
mounting_facility_quantity2 SINGLE GROUP
NSN5950-00-345-7474
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,POWER TITLE COMPONENT PN P8391 MFR TRANSFORMER,POWER
KEY FEATURES
•
MOUNTING HOLE DIAMETER: 0.188 INCHES NOMINAL SINGLE GROUP IN
•
INCLOSURE TYPE: OPEN
•
BODY WIDTH: 1.375 INCHES NOMINAL IN
•
WINDING OPERATING CURRENT: 350.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
•
WINDING FUNCTION AND QUANTITY: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
•
MOUNTING METHOD: FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
•
MOUNTING FACILITY QUANTITY: 2 SINGLE GROUP
•
WINDING OPERATING VOLTAGE: 12.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING HOLE DIAMETER0.188 INCHES NOMINAL SINGLE GROUP IN
INCLOSURE TYPEOPEN
BODY WIDTH1.375 INCHES NOMINAL IN
WINDING OPERATING CURRENT350.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
WINDING FUNCTION AND QUANTITY1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
MOUNTING METHODFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
MOUNTING FACILITY QUANTITY2 SINGLE GROUP
WINDING OPERATING VOLTAGE12.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
TERMINAL TYPE AND QUANTITY4 WIRE LEAD
DISTANCE BETWEEN MOUNTING FACILITY CENTERS2.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
28737Interchangeable
interchangeable cross-reference
interchangeable
QD572Interchangeable
interchangeable cross-reference
interchangeable
C8421Interchangeable
interchangeable cross-reference
interchangeable
T304Interchangeable
interchangeable cross-reference
interchangeable
FFS85TYPE1STYLE10SInterchangeable
interchangeable cross-reference
interchangeable
280451PC46Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is P8391?
P8391 is a TRANSFORMER,POWER.
What parts can replace P8391?
There are 25 known substitutes for P8391: 28737, QD572, C8421 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for P8391?
P8391 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-345-7474. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026