PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5509-2Relay,electromagnetic

Te Connectivity Corporation · NSN 5945-00-257-9128 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-257-9128 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-257-9128. Primary manufacturer part number: 5509-2.
Features
  • Relay,electromagnetic — FSC 5945
  • Unthreaded Mounting Hole Diameter: 0.136 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Mounting Facility Pattern: RECTANGULAR SINGLE MOUNTING FACILITY
  • Main Contact Load Current Rating at Maximum Rated Voltage: 3.0 AMPERES DC RESISTIVE LOAD
  • Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Pile-Up Main Contact Form Arrangement: 2C
  • Duty Type: CONTINUOUS
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 0.438 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-257-9128, 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 Te Connectivity Corporation. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-257-9128
Primary Part Number5509-2
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerTe Connectivity Corporation
StatusCANCELLED
Unthreaded Mounting Hole Diameter0.136 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Main Contact Load Current Rating at Maximum Rated Voltage3.0 AMPERES DC RESISTIVE LOAD
Mounting Facility Type and Quantity4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Pile-Up Main Contact Form Arrangement2C
Duty TypeCONTINUOUS
Center to Center Distance Between Mounting Facilities Parallel to Length0.438 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Operating Voltage Rating and Type at Specified Temp27.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Main Contact Maximum Voltage Rating in Volts30.0 DC
Winding DC Resistance Rating300.0 OHMS NOMINAL SINGLE WINDING
Winding Quantity1
Coil Quantity1
Terminal Type and Quantity8 PIN ALL FUNCTIONS
Center to Center Distance Between Mounting Facilities Parallel to Width0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5310-00-198-371155092 INTERCHANGEABLE
Washer,lock
Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling
6220-00-659-7955129-00-122 INTERCHANGEABLE
Directional Light,vehicular
Arrow Safety Device Co
2540-00-835-9039 INTERCHANGEABLE
Pintle Assembly,towing
5310-00-851-2864 INTERCHANGEABLE
Nut,plain,hexagon
5995-01-332-1753G284347-149 INTERCHANGEABLE
Cable Assembly,radio Frequency
Raytheon Company Dba Raytheon Co
6625-01-441-126855092 INTERCHANGEABLE
Lead,test
Rice Lake Weighing Systems, Inc.
2540-01-533-949155092 INTERCHANGEABLE
Tow Hook
Aerovironment, Inc. Dba Aerovironment Inc
Cross-Reference Index
Part NumberManufacturer
5509-2 PRIMARY Te Connectivity Corporation (USA)
L218681-2 Honeywell International Inc Dba Honeywell (USA)
5409-0022 Te Connectivity Corporation (USA)
5409-22 Airpax Corporation Llc Dba Airpax Corporation Llc (USA)
5509-2 Airpax Corporation Llc Dba Airpax Corporation Llc (USA)
5509-2 North American Philips Corp (USA)
5409-22 Te Connectivity Corporation (USA)
5409-22 North American Philips Corp (USA)
Related Parts
5310-00-198-3711INTERCHANGEABLE
WASHER,LOCK
55092
6220-00-659-7955INTERCHANGEABLE
DIRECTIONAL LIGHT,VEHICULAR
129-00-122
2540-00-835-9039INTERCHANGEABLE
PINTLE ASSEMBLY,TOWING
5310-00-851-2864INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5995-01-332-1753INTERCHANGEABLE
CABLE ASSEMBLY,RADIO FREQUENCY
G284347-149
6625-01-441-1268INTERCHANGEABLE
LEAD,TEST
55092
2540-01-533-9491INTERCHANGEABLE
TOW HOOK
55092

Frequently Asked Questions

What is NSN 5945-00-257-9128?

NSN 5945-00-257-9128 is a Relay,electromagnetic, manufactured by Te Connectivity Corporation, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-257-9128?

NSN 5945-00-257-9128 has 8 cross-referenced part numbers: 5509-2 (Te Connectivity Corporation), L218681-2 (Honeywell International Inc Dba Honeywell), 5409-0022 (Te Connectivity Corporation), 5409-22 (Airpax Corporation Llc Dba Airpax Corporation Llc), 5509-2 (Airpax Corporation Llc Dba Airpax Corporation Llc) and 3 more.

What NSN replaces 5945-00-257-9128?

There are 7 known substitutes for 5945-00-257-9128: 5310-00-198-3711, 6220-00-659-7955, 2540-00-835-9039 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5509-2?

Key specifications for 5509-2: Unthreaded Mounting Hole Diameter: 0.136 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Mounting Facility Pattern: RECTANGULAR SINGLE MOUNTING FACILITY; Main Contact Load Current Rating at Maximum Rated Voltage: 3.0 AMPERES DC RESISTIVE LOAD; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-257-9128 still in active supply?

NSN 5945-00-257-9128 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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