Model: SD32

Stepping Switch

Properties:

Overall Length
6.500 inches
Overall Height
2.125 inches
Overall Width
4.500 inches
Current Type
Dc
Mounting Method
Base
Drive Type
Direct
Mounting Configuration
Two no. 8/0.190 in./-32 tapped mtg holes diagonally located on 0.193 in. By 5.187 in. Mtg centers
Voltage Rating
48.0 volts
Control Method
Self
Homing Method
Through off-normal springs
Bank Level Quantity
8
Contact Quantity Per Bank Level
20
Wiper Contact Quantity Per Bank Level
8
Contact Current Rating
3.0 amperes
Contact Type
Nonbridging
Nonbridging Level Quantity
8
Magnetic Coil Quantity
1
Coil Type
Drive
Operating Current Rating
440.0 milliamperes
Electrical Resistance
19.0 ohms
Auxiliary Off-normal Contact Arrangement
1c
Auxiliary Interrupter Contact Arrangement
1b
Stepping Direction
Unidirectional
Fsc Application Data
Telephone switch stepping
NSN
5930-00-505-1820
Part Number
SD32
Description
Switch,stepping
CAGE

An electromagnetically actuated switch having contact wipers which are successively rotated over fixed bank contacts. The contact wipers are progressively advanced over the fixed bank contacts through a repetitive series of stepping operations. The stepping operation may be a continuous forward rotation acting through 360 degrees to return to its normal unoperated position or it may be designed to include an electromagnetic and/or mechanical means for releasing and resetting the switch to its released position for a subsequent operation. The contact wipers may be mechanically held in contact with the fixed bank contacts after the armature of the actuating coil has released. The switch may be released at the end of its travel or at any intermediate position. It includes items designed with two electromagnetic actuators that enable the switch to operate in either direction. For items having the dual function of a switch and a relay assembled together on a common mounting, see relay-switch. For other than electromagnetically actuated switches whose contact wipers are manually rotated over fixed bank contacts, see switch, rotary. Excludes relay, rotary and switch, telephone (as modified).

Part SD32 NSN 5930-00-505-1820

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
26954
FIIG:
T142-A
Concept No.:
App. Key:
AA
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:
A
ESD:
ESD:
MMAC:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.9000lbs
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: 8536509065
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

Freight Class: Switches, for a voltage not exceeding 1000 volts, nesoi

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