PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

645-6105Relay Assembly

Northern Telecom Inc Telecom Distribution Div · NSN 5945-00-731-1712 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-731-1712 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-731-1712. Primary manufacturer part number: 645-6105.
Features
  • Relay Assembly — FSC 5945
  • Individual Relay Quantity: 2
  • Controlling Agency: NORTHROP CORPORATION
  • Mounting Configuration: THREADED HOLE MOUNTED
  • Relay Type: ELECTROMAGNETIC
  • Identifying Number: 21089-1 DRAWING NO.
  • Mounting Facility: BRACKET(S)
  • 3 verified cross-references
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay Assembly, cataloged under National Stock Number 5945-00-731-1712, is classified within Federal Supply Class 5945 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Northern Telecom Inc Telecom Distribution Div. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-731-1712
Primary Part Number645-6105
Item NameRelay Assembly
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerNorthern Telecom Inc Telecom Distribution Div
StatusACTIVE
Individual Relay Quantity2
Controlling AgencyNORTHROP CORPORATION
Mounting ConfigurationTHREADED HOLE MOUNTED
Relay TypeELECTROMAGNETIC
Identifying Number21089-1 DRAWING NO.
Mounting FacilityBRACKET(S)
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
1650-00-325-996921089-1 INTERCHANGEABLE
Valve,directional F
Hydro-Aire Aerospace Corp
5985-01-319-8304187802 INTERCHANGEABLE
Coupler,rotary,radio Frequency
Northrop Grumman Systems Corporation
Cross-Reference Index
Part NumberManufacturer
645-6105 Northern Telecom Inc Telecom Distribution Div (USA)
21089-1 Northrop Grumman Corp Precision Products Plant (USA)
R31877PC6 Northrop Grumman Corp Precision Products Plant (USA)
Related Parts
1650-00-325-9969INTERCHANGEABLE
VALVE,DIRECTIONAL F
21089-1
5985-01-319-8304INTERCHANGEABLE
COUPLER,ROTARY,RADIO FREQUENCY
187802

Frequently Asked Questions

What is NSN 5945-00-731-1712?

NSN 5945-00-731-1712 is a Relay Assembly, manufactured by Northern Telecom Inc Telecom Distribution Div, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-731-1712?

NSN 5945-00-731-1712 has 3 cross-referenced part numbers: 645-6105 (Northern Telecom Inc Telecom Distribution Div), 21089-1 (Northrop Grumman Corp Precision Products Plant), R31877PC6 (Northrop Grumman Corp Precision Products Plant).

What NSN replaces 5945-00-731-1712?

There are 2 known substitutes for 5945-00-731-1712: 1650-00-325-9969, 5985-01-319-8304. Verify interchangeability with system specifications before substitution.

What are the specifications of 645-6105?

Key specifications for 645-6105: Overall Length: 6.420 INCHES NOMINAL IN; Individual Relay Quantity: 2; Controlling Agency: NORTHROP CORPORATION; Overall Height: 1.359 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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