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PP1957-1 ✓ 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 BACKSHELL,ELECTRICAL CONNECTOR is a the manufacturer industrial component. Key specifications include relay_type: ELECTROMAGNETIC, overall_width: 1.938 INCHES MAXIMUM IN, overall_height: 3.375 INCHES MAXIMUM IN, overall_length: 3.000 INCHES MAXIMUM IN, mounting_configuration: FOUR NO. 8-32 THD MTG STUDS SPACED ON 2.125 IN.

BY 0.875 IN. MTG CENTERS IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-521-0536, 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
PP1957-1
NSN: 5945-00-521-0536
FSC: 5945
CAGE: 04773 — GTE COMMUNICATION SYSTEMS CORP (USA)
SPECIFICATIONS
relay_typeELECTROMAGNETIC
overall_width1.938 INCHES MAXIMUM IN
overall_height3.375 INCHES MAXIMUM IN
overall_length3.000 INCHES MAXIMUM IN
mounting_configurationFOUR NO. 8-32 THD MTG STUDS SPACED ON 2.125 IN. BY 0.875 IN. MTG CENTERS IN
individual_relay_quantity3
NSN5945-00-521-0536
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BACKSHELL,ELECTRICAL CONNECTOR TITLE COMPONENT PN PP1957-1 MFR BACKSHELL,ELECTRICAL C
KEY FEATURES
•
INDIVIDUAL RELAY QUANTITY: 3
•
RELAY TYPE: ELECTROMAGNETIC
•
MOUNTING CONFIGURATION: FOUR NO. 8-32 THD MTG STUDS SPACED ON 2.125 IN. BY 0.875 IN. MTG CENTERS IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH1.938 INCHES MAXIMUM IN
INDIVIDUAL RELAY QUANTITY3
RELAY TYPEELECTROMAGNETIC
OVERALL HEIGHT3.375 INCHES MAXIMUM IN
MOUNTING CONFIGURATIONFOUR NO. 8-32 THD MTG STUDS SPACED ON 2.125 IN. BY 0.875 IN. MTG CENTERS IN
OVERALL LENGTH3.000 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
20277Interchangeable
interchangeable cross-reference
interchangeable
150M25AInterchangeable
interchangeable cross-reference
interchangeable
23162Interchangeable
interchangeable cross-reference
interchangeable
811AD0078Interchangeable
interchangeable cross-reference
interchangeable
922180-105Interchangeable
interchangeable cross-reference
interchangeable
DD24661Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PP1957-1?
PP1957-1 is a BACKSHELL,ELECTRICAL CONNECTOR.
What parts can replace PP1957-1?
There are 8 known substitutes for PP1957-1: 20277, 150M25A, 23162 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PP1957-1?
PP1957-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-521-0536. 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