RT21B8

RT21B8 Electromagnetic Relay
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Datasheet. RT21B8 specification

Thread Class
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.

2b single mounting facility

Overall Length
The dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.

4.000in. ⁓4-1/64"

Center To Center Distance Between Mounting Facilities Parallel To Length
The distance between the center of one mounting facility and the center of the adjacent mounting facility parallel to the length.

0.750in. single mounting facility

Overall Height
The distance measured in a straight line from the bottom to the top of an item.

1.210in.

Overall Width
An overall measurement taken at right angles to the length of an item,in distinction from thickness.

1.750in.

Winding Quantity
The number of individual /not electrically connected/ windings.

2

Coil Quantity
The number of coils included on the item.

1

Winding Dc Resistance Rating
The measured opposition to the flow of direct current offered by the item winding.

1.0 kilohms second winding

Winding Dc Resistance Rating
The measured opposition to the flow of direct current offered by the item winding.

300.0 ohms first winding

Duty Type
Indicates the type of duty provided.

continuous

Mounting Facility Type And Quantity
Indicates the type and number of facilities by which the item is mounted.

2 threaded hole single mounting facility

Pile-up Main Contact Form Arrangement
The number and combination(s) of the basic contact forms,in the order of assemblage,which make up the switching structure of the pile-up main contacts.

2a

Nominal Thread Size
A designation that is used for the purpose of general identification of the thread.

0.164in. single mounting facility ⁓11/64"

Mounting Facility Pattern
The general configuration and relative position of the facilities provided for mounting the item.

IN-Line single mounting facility

Nominal Operating Current Rating And Type
The required current value,applied to the energizing element,at which the switching mechanism or actuator element must have assumed a fully operated position.

33.0 milliamperes dc all windings

Operating Voltage Rating And Type At Specified Temp
The amount and type of voltage required at designated temperature to be applied to the input or energizing element of the item to ensure normal operation of the switching elements.

48.0 volts dc 25 deg celsius all windings

Main Contact Load Current Rating At Maximum Rated Voltage
The amount of current the main contacts are rated to make or break at maximum rated voltage,with a specified load.

3.0 amperes dc resistive load

Main Contact Maximum Voltage Rating In Volts
The highest voltage at which the main contacts are rated for normal operation,expressed in volts.

50.0 dc

Special Features
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.

slow release due to copper sleeve about coil core

Thread Series Designator
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

unc single mounting facility

Terminal Type And Quantity
Indicates the type and number of terminals for providing electrical connection.

8 pin all functions

Fsc Application Data (non-core)
The justification for the assignment of a federal supply class /fsc/ to an item based on the classification of the next higher classifiable assembly.

panel, telephone switchboard

Answers.

What quantity is this sold in?

1EA

What class is the thread series?

Unc single mounting facility

What is the overall width?

1.750 inches

What is the thread class?

2b single mounting facility

What is the NSN for RT21B8?

5945-00-332-9119

How is this classified for shipping?

Schedule B number: 8536410020
Relays, electromechanical, with contacts rated less than 10 a, for a voltage not exceeding 60 v

What's the federal classification of RT21B8?

FSC 5945 ⁓ Relays and solenoids

Excluding contractors.

NSN 5945-00-332-9119 RELAY,ELECTROMAGNETIC

unc single mounting facility thread series slow release due to copper sleeve about coil core 1.750" overall width 4.000" overall length 2b single mounting facility thread class

NIIN
003329119
NIIN Date
01/01/61
Schedule B
8536410020 
Name Code
32512
FIIG
A03300
Item Weight
0.000lbs
Item Dimensions
--
QUP
1 
Historical Price
$11.73 EA
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
Metal content unknown
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

Other Part Numbers Parts with same form, fit, and function by other manufacturers

1. MD81PCRT21B8 Cage 04773
2. MD814625PCRT21B8 Cage 04773

Major End Users Countries and entities

  • - Italy 

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Similar by Design Other relays with similar characteristics

Nothing similar to this part number was found in our inventory

RT21B8 / Relay,electromagneticWhat is the formal definition of this item?

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.