SB221NC NKK Switches, SB221NC Datasheet
SB221NC
Manufacturer Part Number
SB221NC
Description
SW PUSHBUTTON SPST NC SLD LUG
Manufacturer
NKK Switches
Series
SBr
Type
Standardr
Datasheet
1.SB61A.pdf
(3 pages)
Specifications of SB221NC
Circuit
SPST-NC
Switch Function
On-Mom
Contact Rating @ Voltage
3A @ 125VAC
Actuator Type
Plunger for Cap
Mounting Type
Panel Mount
Termination Style
Solder Lug
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Illumination Type, Color
-
Illumination Voltage (nominal)
-
Other names
SB221NC-RO
SB221NC-RO
SB221NC-RO
C
Series SB
C128
Electrical Capacity (Resistive Load)
Other Ratings
Materials & Finishes
Installation
Standards & Certifications
Notes: Standard Hardware: AT504M Knurled Nut, AT508 Lockwasher, AT527M Hex Backup Nut. See Accessories & Hardware section.
* See General Specifications for approval marking.
*
Movable & Stationary Contacts:
Suffix T =
Screw Lug
SB221TNO
Wire harness & cable assemblies offered only in Americas.
SB221TNC
SB221NO
SB221NC
AT414 Black Cap
Model
Supplied with
All switches listed here are supplied
SB221NO
Operating Temp Range:
Soldering Time & Temp:
Insulation Resistance:
with AT414 black cap.
Contact Resistance:
Dielectric Strength:
Mechanical Life:
R
GENERAL SPECIFICATIONS FOR SB25, SB60s, SB221s, SB265
Electrical Life:
––
––
Throw &
Schematic:
Power Level:
*Approvals
Total Travel:
Terminals:
C
Bushing:
––
––
Dimension B Plunger Extension: .197” (5.0mm) for NO model & .161” (4.1mm) for NC model.
Case:
SINGLE POLE WITH SOLDER LUG
US
CSA:
Cap:
Keyway
UL:
(13.2)
.520
Dimension A: .185” (4.7mm) for NO model & .150” (3.8mm) for NC model.
Shown in the following tables
10 milliohms maximum
200 megohms minimum @ 500V DC for SB221s, SB25, & SB265;
1,000 megohms minimum @ 500V DC for SB60s.
1,500V AC minimum for SB265 & SB25 for 1 minute minimum;
2,000V AC minimum between contacts for SB221s & SB60s for 1 minute minimum;
1,500V AC minimum between contacts & case for SB221s & SB60s for 1 minute minimum
50,000 operations minimum for SB221s;
30,000 operations minimum for SB25, SB60s, SB265
10,000 operations minimum
SB221s .116” (2.95mm); SB60s .094” (2.4mm); SB265 .213” (5.4mm);
SB25 .195” (4.95mm)
–10°C through +70°C (+14°F through +158°F)
Polybutylene terephthalate (PBT) (AT414)
Brass with nickel plating
Phenolic resin or melamine phenolic resin
Copper with silver plating for SB221s; silver alloy with silver plating for SB25, SB60s, & SB265
Copper with tin plating for SB25 & SB60s; copper with silver plating for SB265
Manual Soldering (Solder Lug): See Profile A in Supplement section.
File No. E44145
Designated with UL & cULus recognized symbols beside part numbers on following pages.
See Supplement Index page Z2 to find rating details.
Add “/U” or “/CUL” to end of part number to order UL or cULus marks on switch.
File No. 023535_0_000
Designated with CSA certified symbol beside part numbers on following pages.
See Supplement section to find rating details.
Add “/C” to end of part number to order CSA mark on switch.
SPST
SB221NO
Pole &
Throw
SPST
SPST
SPST
SPST
(13.2) Dia
.520
Normal
OFF
ON
OFF
ON
www.nkk.com
1
Pushbutton Position/Connected Terminals
(11.0)
.433
M12 P1
B
A
4
(12.0)
.472
Keyway
1-4
1-4
–
–
( ) = Momentary
(15.7)
.618
SPST
SB221NC
Low/Medium Capacity Pushbuttons
Down
(ON)
(OFF)
(ON)
(OFF)
*
(2.4) Dia
.094
OR SCREW LUG
Case Cover:
Plunger:
1
4
1-4
1-4
—
—
1
4
.031
Polyacetal or brass with nickel plating
Steel with zinc plating
(0.8)
(25.5)
1.004
(8.0)
.315
Note: Terminal numbers are
Electrical Capacity (Resistive)
125V
3A
3A
3A
3A
AC
(7.0)
.276
actually on the switch.
(8.0)
.315
M3 x P0.5 x 4
Panel Thickness
.193” (4.9mm)
.060
250V
1.5A
1.5A
1.5A
1.5A
(1.5)
AC
(12.5) Dia
.492
(11.5)
.453
(0.8)
.031
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SB221NC Summary of contents
Page 1
... Throw SPST OFF – (ON) SPST ON 1-4 (OFF) SPST OFF – (ON) SPST ON 1-4 (OFF) SPST SPST SB221NO SB221NC 1 4 M12 P1 (13.2) Dia .520 (2.4) Dia B .094 (11.0) (12.0) (15.7) A .433 .472 .618 www.nkk.com Plunger: Polyacetal or brass with nickel plating Case Cover: Steel with zinc plating ...
Page 2
... DPDT (2.4) Dia Typ .094 3 6 (4.8) Typ (31.2) .189 1.228 5 2 COM 4 1 (5.7) .224 (25.7) (0.8) Typ 1.012 .031 Pushbutton Position/Connected Terminals ( ) = Momentary Normal Down Keyway ON 2-3 5 (COM) 5 DPDT (2.4) Dia .094 (4.8) Typ 6 3 .189 (31.2) COM 5 2 1.228 (8 ...
Page 3
... Wire harness & cable assemblies offered only in Americas. Keyway (13.2) .520 SB265 Supplied with Chrome Plated Brass Cap C130 Low/Medium Capacity Pushbuttons SINGLE POLE WITH SOLDER LUG Pushbutton Position/Connected Terminals ( ) = Momentary Normal Down Pole & Keyway Throw SPST ON 1-4 OFF SPST ...