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PR56 ✓ 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 COVER,TERMINAL BOARD is a the manufacturer industrial component. Key specifications include body_width: 2.620 INCHES NOMINAL IN, body_height: 4.100 INCHES MAXIMUM IN, body_length: 2.620 INCHES NOMINAL IN, inclosure_type: FULLY INCLOSED, overall_height: 6.300 INCHES NOMINAL IN, mounting_method: FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-758-0956, 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
PR56
NSN: 5950-00-758-0956
FSC: 5950
CAGE: 88869 — EATON CORP ELECTRONIC INSTRUMENTATION DIV LOS ANGELES PLANT (USA)
SPECIFICATIONS
body_width2.620 INCHES NOMINAL IN
body_height4.100 INCHES MAXIMUM IN
body_length2.620 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
overall_height6.300 INCHES NOMINAL IN
mounting_methodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
frequency_rating50.0 HERTZ MINIMUM AND 10.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
mounting_hole_diameter0.156 INCHES NOMINAL SINGLE GROUP IN
mounting_facility_quantity4 SINGLE GROUP
terminal_type_and_quantity5 TURRET
input-output_phase_relationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
center_to_center_distance_between_mounting_facilities_parallel_to_width2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
NSN5950-00-758-0956
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available COVER,TERMINAL BOARD TITLE COMPONENT PN PR56 MFR COVER,TERMINAL BOARD
KEY FEATURES
•
BODY LENGTH: 2.620 INCHES NOMINAL IN
•
BODY WIDTH: 2.620 INCHES NOMINAL IN
•
INCLOSURE TYPE: FULLY INCLOSED
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH: 2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
•
MOUNTING FACILITY QUANTITY: 4 SINGLE GROUP
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH: 2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
•
MOUNTING HOLE DIAMETER: 0.156 INCHES NOMINAL SINGLE GROUP IN
TECHNICAL CHARACTERISTICS (FLIS)
BODY LENGTH2.620 INCHES NOMINAL IN
BODY WIDTH2.620 INCHES NOMINAL IN
INCLOSURE TYPEFULLY INCLOSED
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
MOUNTING FACILITY QUANTITY4 SINGLE GROUP
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
OVERALL HEIGHT6.300 INCHES NOMINAL IN
MOUNTING HOLE DIAMETER0.156 INCHES NOMINAL SINGLE GROUP IN
INPUT-OUTPUT PHASE RELATIONSHIPSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
MOUNTING METHODFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
320AInterchangeable
interchangeable cross-reference
interchangeable
165-22-327EInterchangeable
interchangeable cross-reference
interchangeable
7705Interchangeable
interchangeable cross-reference
interchangeable
3-20A CInterchangeable
interchangeable cross-reference
interchangeable
077057Interchangeable
interchangeable cross-reference
interchangeable
7923205-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PR56?
PR56 is a COVER,TERMINAL BOARD.
What parts can replace PR56?
There are 21 known substitutes for PR56: 320A, 165-22-327E, 7705 and 18 more. Substitute compatibility should be verified for your specific system.
Is PR56 still available?
PR56 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026