Model: 56-1978-2

Rotary Switch

Properties:

Thread Length
0.380 inches single mounting facility
Hazardous Locations/environmental Protection
Explosion proof
Overall Length
7.120 inches
First Flat Length
0.437 inches 2nd actuator
First Flat Length
0.470 inches 1st actuator
Flat Height
0.094 inches 2nd actuator
Flat Height
0.210 inches 1st actuator
Shaft Diameter
0.125 inches 2nd actuator
Shaft Diameter
0.250 inches 1st actuator
Shaft Length
0.870 inches 1st actuator
Shaft Length
1.500 inches 2nd actuator
Overall Diameter
2.000 inches
Individual Section Quantity
10
Nonturn Device Type
Slotted bushing at 3: 00 o'clock
Operating Tempurature Range
-65.0/+125.0 degrees celsius
Switch Contact Basic Design
Nonpile-up symmetrical
Mounting Method
Threaded bushing single mounting facility
Thready Qty Per Inch (tpi)
32 single mounting facility
Thread Size
0.469 inches single mounting facility
Contact Voltage Rating In Volts
115.0 ac at sea level
Contact Voltage Rating In Volts
28.0 dc at sea level
Shaft Flat/slot Angular Location
0.0 degrees from nonturn device 1st actuator
Shaft Flat/slot Angular Location
0.0 degrees from nonturn device 2nd actuator
Switch Actuator Indexing Position Quantity
12 2nd actuator
Switch Actuator Indexing Position Quantity
24 1st actuator
Shaft Type
Round, flatted 2nd actuator
Shaft Type
Round, hollowed, flatted 1st actuator
Terminal Type
Tab, solder lug
Contact Switching Action
Breaks before makes each section rear
Switch Actuator Positioning Increment
15.0 degrees 1st actuator
Switch Actuator Positioning Increment
15.0 degrees 2nd actuator
Contact Load Current Rating
3.0 amperes resistive load dc at sea level
Contact Load Current Rating
5.0 amperes resistive load ac at sea level
Style Designator
Tap, circular, bushing mount
Test Data Document
81349-mil-s-3786 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator
Uns single mounting facility
NSN
5930-01-023-6283
Part Number
56-1978-2
Description
Switch,rotary
CAGE
91812

A switch actuated by a definite angular rotation of the switch shaft about its axis. For items having rated actuation travel and pressure characteristics, see switch, sensitive. Excludes relay, rotary; switch, stepping; and switch, telephone (as modified).

Part 56-1978-2 NSN 5930-01-023-6283

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
02134
FIIG:
A052B0
Concept No.:
1
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061300
UFC:
34410
LTL:
77.5
LCL:
--
WCC:
658
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8536509020
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

Freight Class: Switches, rotary, rated at not over 5 a, for a voltage not exceeding 1,000 v

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