NSN 5945-01-493-4161 C21AA, C-21AA, 01-493-4161

Product Details | ELECTROMAGNETIC RELAY

5945-01-493-4161 A relay which is actuated by the effect of a magnetic field developed by the current in its energizing coil(s). Includes solenoid and armature types. Excludes CONTACTOR, MAGNETIC; RELAY, METER MOVEMENT; RELAY, MOTOR DRIVEN; RELAY, REED; RELAY, RESONANT REED; RELAY, ROTARY; and SWITCH, STEPPING.

Part Alternates: C21AA, C-21AA, 5945-01-493-4161, 01-493-4161, 5945014934161, 014934161

Electrical and Electronic Equipment Components | Relays and Solenoids

Supply Group (FSG)	NSN Assign.	NIIN	Item Name Code (INC)
59	04 JAN 2002	01-493-4161	32512 ( RELAY, ELECTROMAGNETIC )

Part Number	Request Date	QTY	Origin
C-21AA	2025-11-328	5	DIBBS
C-21AA	2025-11-321	5	DIBBS
C-21AA	2025-11-313	5	DIBBS
C-21AA	2025-11-310	5	DIBBS
C-21AA	2025-10-279	2	DIBBS
C-21AA	2025-09-268	2	DIBBS
C-21AA	2023-11-325	8	DIBBS
C-21AA	2023-09-256	3	DIBBS
C-21AA	2023-07-208	2	DIBBS
C-21AA	2023-03-72	2	DIBBS
C-21AA	2023-03-61	2	DIBBS
C-21AA	2023-02-33	2	DIBBS
C-21AA	2019-09-269	3	DIBBS
C-21AA	2019-08-234	2	DIBBS
C-21AA	2019-01-29	2	DIBBS
C-21AA	2019-01-17	2	DIBBS

Cross Reference | NSN 5945-01-493-4161

Part Number	Cage Code	Manufacturer
C-21AA	74063	TYCO ELECTRONICS CORPORATION DBA CII TECHNOLOGIES HARTMAN

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Related Products | NSN 5945-01-493-4161

5945-01-493-4356, 5945-01-493-4969, 5945-01-493-5251, 5945-01-493-5562, 5945-01-493-5668

Technical Data | NSN 5945-01-493-4161

Characteristic	Specifications
NONPILE-UP MAIN CONTACT ARRANGEMENT	3 POLE, SINGLE THROW, NORMALLY OPEN, DOUBLE MAKE, MOMENTARY ACTION
MAIN CONTACT MAXIMUM VOLTAGE RATING IN VOLTS	208.0 AC
AUXILIARY CONTACT MAXIMUM VOLTAGE RATING IN VOLTS	115.0 AC AND 28.0 DC
MAIN CONTACT LOAD CURRENT RATING AT MAXIMUM RATED VOLTAGE	25.0 AMPERES AC RESISTIVE LOAD 5.0 AMPERES AC LAMP LOAD 25.0 AMPERES AC MOTOR LOAD
AUXILIARY CONTACT LOAD CURRENT RATING AT MAXIMUM RATED VOLTAGE	3.0 AMPERES AC RESISTIVE LOAD 3.0 AMPERES AC INDUCTIVE LOAD 1.0 AMPERES AC LAMP LOAD
COIL QUANTITY	1
WINDING QUANTITY	1
OPERATING VOLTAGE RATING AND TYPE AT SPECIFIED TEMP	18.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
FREQUENCY IN HERTZ	400.0 NOMINAL
TERMINAL TYPE AND QUANTITY	8 THREADED STUD ENERGIZING ELEMENT AND CONTACTS
OVERALL LENGTH	3.210 INCHES MAXIMUM
OVERALL WIDTH	3.210 INCHES MAXIMUM
OVERALL HEIGHT	3.000 INCHES MAXIMUM
MOUNTING FACILITY TYPE AND QUANTITY	4 UNTHREADED HOLE SINGLE MOUNTING FACILITY
MOUNTING FACILITY PATTERN	RECTANGULAR SINGLE MOUNTING FACILITY
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH	1.875 INCHES NOMINAL SINGLE MOUNTING FACILITY
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH	1.875 INCHES NOMINAL SINGLE MOUNTING FACILITY
UNTHREADED MOUNTING HOLE DIAMETER	0.176 INCHES MINIMUM AND 0.182 INCHES MAXIMUM SINGLE MOUNTING FACILITY
III END ITEM IDENTIFICATION	C-5AIRCRAFT

Restrictions/Controls & Freight Information | NSN 5945-01-493-4161

Restrictions
Freight

Category	Code	Description
Shelf-Life Code:	0	Nondeteriorative
Hazardous Material Indicator Code	N	There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:	A	Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:	U	UNCLASSIFIED
Electro-static Discharge Susceptible:	B	ESD sensitivity
Precious Metals Indicator Code:	A	Item does not contain precious metal
Criticality Code:	X	The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Automatic Data Processing Equipment:	0	Represents items with no ADP components. NOTE: Codes 1 through 6 are only to be used when the item is Automatic Data Processing Equipment (ADPE) in its entirety and is limited to the type meeting only one of the definitions for codes 1 through 6. (See code 9)

Category	Code	Description
NMF Description	061300	CIRCUIT BREAKER/SWITCH NOI
Less than car load rating	P	77.5
Less than truck load rating	P	77.5
Water commodity Code	72D	unknown
Originating Activity Code	TK	HQ AFMC/GLSC 401 SCM/GUMB Wright-Patterson AFB, OH 45433-5000
Air Dimension Code	A	Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity	H	Signal Corps supplies and equipment, including radio equipment and supplies, communications equipment and supplies, electrical equipment and supplies, etc.
Air Special Handling	Z	No special handling required.
Special Handling Code	9	unknonwn
HAZMAT
Type of Cargo	Z	No special type of cargo code applicable

Management | NSN 5945-01-493-4161

Air Force

Category	Code	Description
Budget Code	9	General Support DIV57X4921.070:Air Force decentrally managed expense items (ERRC XB3, XF-3) with a unit cost of less than $250,000 that are requisitioned/procured at base (retail) level from DLA, GSA, Army, Navy, Depot Maintenance Service, Air Force Industrial Fund (AFMC), local manufacture and commercial vendors.
Price Validation	E	The current standard price is an estimated price. Estimated Price challenges are allowed, but follow procedures in para 60.b. (3) of section L of this manual. This code will be changed to a P code upon notification of a contract price or this code will be changed to an updated code upon determination of a valid price.
Fund Code	SF	Stock fund applicable to items managed for the Air Force by the respective Inventory Control Point.
Materiel Management Aggregation Code	UC	TG:C-5A GALAXY
Source of Supply	SMS	Defense Logistics Agency Enterprise Business Systems
Agency	DF	Department of the Air Force
Service Organization	F	U.S. Air Force
Reparability	N	Stock Fund (except Munitions)
Acquisition Advice Codes	Z	INSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	1 EA : Each