PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21052Relay,electromagnetic

Whittaker Corp Whittaker Electronic Systems Div · NSN 5945-00-542-0983 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-542-0983 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-542-0983. Primary manufacturer part number: 21052.
Features
  • Relay,electromagnetic — FSC 5945
  • Purpose for Which Designed: GENERAL
  • Time Delay: 0.0085 SECONDS MAXIMUM FIXED OPERATE AND RELEASE TIME
  • Nonpile-Up Main Contact Arrangement: 2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
  • Mounting Slot Width: 0.150 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Fragility Factor: MODERATELY RUGGED
  • Operating Voltage Rating and Type at Specified Temp: 26.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
  • Main Contact Load Current Rating at Maximum Rated Voltage: 5.0 AMPERES AC AND 5.0 AMPERES DC RESISTIVE LOAD
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-542-0983, 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 Whittaker Corp Whittaker Electronic Systems Div. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-542-0983
Primary Part Number21052
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerWhittaker Corp Whittaker Electronic Systems Div
StatusACTIVE
Purpose for Which DesignedGENERAL
Time Delay0.0085 SECONDS MAXIMUM FIXED OPERATE AND RELEASE TIME
Nonpile-Up Main Contact Arrangement2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Mounting Slot Width0.150 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Fragility FactorMODERATELY RUGGED
Operating Voltage Rating and Type at Specified Temp26.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Main Contact Load Current Rating at Maximum Rated Voltage5.0 AMPERES AC AND 5.0 AMPERES DC RESISTIVE LOAD
Center to Center Distance Between Mounting Facilities Parallel to Length1.406 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Terminal Type and Quantity8 PIN ALL FUNCTIONS
Storage TypeGENERAL PURPOSE WAREHOUSE
Environmental ProtectionHERMETIC
Winding Quantity1
Coil Quantity1
Cubic Measure1.372 CUBIC INCHES
Arc Quenching MethodAIR
Main Contact Maximum Voltage Rating in Volts115.0 AC AND 28.0 DC
Winding DC Resistance Rating900.0 OHMS NOMINAL SINGLE WINDING
Mounting Facility Type and Quantity2 SLOTTED HOLE SINGLE MOUNTING FACILITY
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
Duty TypeCONTINUOUS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
4730-00-134-422221052 INTERCHANGEABLE
Clamp,hose
Norma Pennsylvania Inc. Div Breeze Industrial Products
5310-00-261-734000103321 INTERCHANGEABLE
Washer,lock
Rolls-Royce Solutions America Inc
5950-00-295-7823044-2968-01 INTERCHANGEABLE
Reactor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
6625-00-855-595410548236 INTERCHANGEABLE
Indicator,radio Frequency
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5935-01-092-9293 INTERCHANGEABLE
Adapter,connector
5841-01-100-496221052 INTERCHANGEABLE
Plate,mounting,indicator
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
5975-01-291-03610021050230 INTERCHANGEABLE
Rack,post
Newton Instrument Company Dba Newton Instrument Co
5970-01-388-535321052 INTERCHANGEABLE
Insulator,spreader
Science Applications International Corporation
4820-01-513-974021052-001 INTERCHANGEABLE
Valve,restrictor Check
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
6525-01-592-9473EZCR/DR DIN INTERCHANGEABLE
Test Tool,reader,computed Radiog
Icrco, Inc.
Cross-Reference Index
Part NumberManufacturer
21052 Whittaker Corp Whittaker Electronic Systems Div (USA)
BR7Y900E8-1-4-14 Whittaker Corp Whittaker Electronic Systems Div (USA)
Related Parts
4730-00-134-4222INTERCHANGEABLE
CLAMP,HOSE
21052
5310-00-261-7340INTERCHANGEABLE
WASHER,LOCK
00103321
5950-00-295-7823INTERCHANGEABLE
REACTOR
044-2968-01
6625-00-855-5954INTERCHANGEABLE
INDICATOR,RADIO FREQUENCY
10548236
5935-01-092-9293INTERCHANGEABLE
ADAPTER,CONNECTOR
5841-01-100-4962INTERCHANGEABLE
PLATE,MOUNTING,INDICATOR
21052
5975-01-291-0361INTERCHANGEABLE
RACK,POST
0021050230
5970-01-388-5353INTERCHANGEABLE
INSULATOR,SPREADER
21052
4820-01-513-9740INTERCHANGEABLE
VALVE,RESTRICTOR CHECK
21052-001
6525-01-592-9473INTERCHANGEABLE
TEST TOOL,READER,COMPUTED RADIOG
EZCR/DR DIN

Frequently Asked Questions

What is NSN 5945-00-542-0983?

NSN 5945-00-542-0983 is a Relay,electromagnetic, manufactured by Whittaker Corp Whittaker Electronic Systems Div, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-542-0983?

NSN 5945-00-542-0983 has 2 cross-referenced part numbers: 21052 (Whittaker Corp Whittaker Electronic Systems Div), BR7Y900E8-1-4-14 (Whittaker Corp Whittaker Electronic Systems Div).

What NSN replaces 5945-00-542-0983?

There are 10 known substitutes for 5945-00-542-0983: 4730-00-134-4222, 5310-00-261-7340, 5950-00-295-7823 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21052?

Key specifications for 21052: Purpose for Which Designed: GENERAL; Time Delay: 0.0085 SECONDS MAXIMUM FIXED OPERATE AND RELEASE TIME; Overall Width: 0.525 INCHES MAXIMUM IN; Nonpile-Up Main Contact Arrangement: 2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY. 23 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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