Search
Upload
Modify/Delete

flag more
language Engilsh
language 中文
language 한국어
language Deutsch
language 日本語
language Русский
language Español
language Français
language Italiano
language Português
language polski
language Tiếng Việt
menu
menu_close
Join

Search
Upload
Modify/Delete

menu_language Engilsh
menu_language 中文
menu_language 한국어
menu_language Deutsch
menu_language 日本語
menu_language Русский
menu_language Español
menu_language Français
menu_language Italiano
menu_language Português
menu_language polski
menu_language Tiếng Việt
S2021B Search results
Supplier
SANKEY SHARE CO.,LIMITED IC Trading Company 8STAR-IC MAINtron Electronics Limited. Excellent Electronics Components Inc Alison Enterprise Co., Ltd. ALL NEW SEMI Electronics Co., LIMITED Andy(International)Electroni ANDY ELECTRONICS CO. ANKEY ELECTRONICS CO.,LTD Renxim Electronic Limited. RENXIM Electronics Co.,Ltd. Asemicon Tech. Co.,Ltd. Asia Military Components Trading Co., Ltd. Shenzhen Augswan Electronics Co., LTD. MAINtron Electronics Co.,Ltd. BASUKI ELECTRONICS CO.,LTD. WLParts Electronics ltd SemiLex Electronics Inc. BOTE ELECTRONICS CO.,LTD NegoICCo. SANKEY SHARE CO.,LIMITED SANKEY SHARE CO.,LIMITED MicrotranikComponents,Inc CosmoTek Electronic Limited
Premium A
Element14
Part # Mfg Datasheet Description RoHS Q'ty Price Buy Now
S202S01F
S202S01F
SHARP S202S01F datasheet RELAY, SOLID STATE; Contact Configuration:-; Load Current:8A; Relay Mounting:PCB; Relay Terminals:Th ROHS COMPLIANT 1+ : $6.49
5+ : $6.1
10+ : $5.6
20+ : $5.41
50+ : $5.22
Buy Now
S202S01F buy now
S202S02F
S202S02F
SHARP S202S02F datasheet RELAY, SOLID STATE; Contact Configuration:-; Load Current:8A; Relay Mounting:PCB; Relay Terminals:Th ROHS COMPLIANT 1+ : $7.22
5+ : $6.78
10+ : $6.22
20+ : $6.02
50+ : $5.81
Buy Now
S202S02F buy now
Premium B
info
FEDERAL INDUSTRY CO.
Singapore
Tess@sunnlyic.com
Part # Mfg Datasheet Description Q'ty Datacode Location Reg Date RFQ
S2021B See all 3 items AMCC S2021B datasheet QFP 3689 20+PB Pb-Free 26-10-15
Inquiry
S2021B inquiry
info
IC Agent Electronics Ins
USA
Kevin@ic-agent.com
Part # Mfg Datasheet Description Q'ty Datacode Location Reg Date RFQ
S2021B See all 2 items AMCC S2021B datasheet QFP208 18000 2016+ Instock 26-10-15
Inquiry
S2021B inquiry
Basic
SupplierPart # Mfg Datasheet Description Q'ty Datacode Location Reg Date RFQ
SANKEY SHARE CO.,LIMITED S2021B Rapid deliverywelcome to inqu S2021B datasheet PB FREE/Sincerely for your service 10000 2013+ INSTOCK 2024-06-11
Inquiry
S2021B inquiry
IC Trading Company S2021B AMCC S2021B datasheet QFP 880 2008+ own stock 2025-07-25
Inquiry
S2021B inquiry
8STAR-IC S2021B RoHS S2021B datasheet original new 52470 11+ 2023-07-28
Inquiry
S2021B inquiry
MAINtron Electronics Limited. S2021B STOCK S2021B datasheet standard package with RoHS 46880 2016+ 1-2 days 2024-04-26
Inquiry
S2021B inquiry
Excellent Electronics Components Inc S2021B See all 2 items AMCCAPPLIEDMICROCIRCUITS S2021B datasheet 50000 15+ 2020-11-05
Inquiry
S2021B inquiry
Alison Enterprise Co., Ltd. S2021B N/A S2021B datasheet N/A 13000 NEW STOCK 2026-05-09
Inquiry
S2021B inquiry
ALL NEW SEMI Electronics Co., LIMITED S2021B AMCC S2021B datasheet QFP 100 9744+ 2026-09-30
Inquiry
S2021B inquiry
Andy(International)Electroni S2021B AMCC S2021B datasheet QFPBGA 885 2018+ 2026-10-06
Inquiry
S2021B inquiry
ANDY ELECTRONICS CO. S2021B AMCC S2021B datasheet QFP 980 07+ STOCK 2023-11-20
Inquiry
S2021B inquiry
ANKEY ELECTRONICS CO.,LTD S2021B S2021B datasheet 648945 13+ stock 2026-04-03
Inquiry
S2021B inquiry
Renxim Electronic Limited. [ sales@renxim.com ] S2021B NEW S2021B datasheet Original package well 89050 2016+ Globally & Immediately 2026-01-06
Inquiry
S2021B inquiry
RENXIM Electronics Co.,Ltd. S2021B NEW S2021B datasheet Original package well 89050 2018+ Globally & Immediately 2025-08-02
Inquiry
S2021B inquiry
Asemicon Tech. Co.,Ltd. S2021B N/A S2021B datasheet N/A 13919 NEW STOCK 2026-05-09
Inquiry
S2021B inquiry
Asia Military Components Trading Co., Ltd. S2021B N/A S2021B datasheet N/A 14840 NEW+ STOCK 2026-05-09
Inquiry
S2021B inquiry
Shenzhen Augswan Electronics Co., LTD. S2021B AMCC S2021B datasheet QFP 4296 21+ Stock 2023-07-25
Inquiry
S2021B inquiry
MAINtron Electronics Co.,Ltd. S2021B STOCK S2021B datasheet standard package with RoHS 46880 2016+ 1-2 days 2025-11-18
Inquiry
S2021B inquiry
BASUKI ELECTRONICS CO.,LTD. S2021B AMCC S2021B datasheet QFP 809 N/A STOCK 2022-08-08
Inquiry
S2021B inquiry
WLParts Electronics ltd S2021B AMCC S2021B datasheet QFP 500 06+ 2021-11-11
Inquiry
S2021B inquiry
SemiLex Electronics Inc. S2021B IC S2021B datasheet NEW RoHS and More QTY 59020 17+ STK,Prompt delivery 2026-09-29
Inquiry
S2021B inquiry
BOTE ELECTRONICS CO.,LTD S2021B See all 2 items AMC S2021B datasheet 12000 10+ stock 2023-02-07
Inquiry
S2021B inquiry
NegoICCo. S2021B See all 5 items AMCC S2021B datasheet QFP 16666 2022+ IN STOCK 2026-08-21
Inquiry
S2021B inquiry
SANKEY SHARE CO.,LIMITED S2021B S2021B datasheet 648945 13+ stock 2020-04-08
Inquiry
S2021B inquiry
SANKEY SHARE CO.,LIMITED S2021B S2021B datasheet 648945 13+ stock 2020-04-08
Inquiry
S2021B inquiry
MicrotranikComponents,Inc S2021B See all 2 items Distributor S2021B datasheet for more pls inquire us now 140410 17+RoHS New instock, best quality 2026-09-29
Inquiry
S2021B inquiry
CosmoTek Electronic Limited S2021B S2021B datasheet 64 2017-06-20
Inquiry
S2021B inquiry
Cubic Technology Co.,Ltd. S2021B AMCC S2021B datasheet QFP 1359 N/A STOCK 2026-05-09
Inquiry
S2021B inquiry
Data Biz Advance Int’l Co., Ltd. S2021B AMCC S2021B datasheet QFP 500 06+ STOCK 2026-05-09
Inquiry
S2021B inquiry
DBA Int’l PTE LTD. S2021B N/A S2021B datasheet N/A 13811 NEWD/C STOCK 2026-05-09
Inquiry
S2021B inquiry
RENXIM Electronics Inc S2021B Good price S2021B datasheet new and original package well 98670 15-16+ INSTOCK & GLOBAL 2025-11-17
Inquiry
S2021B inquiry
DIGSAN SEMICONDUCTORS CORP. S2021B AMCC S2021B datasheet QFP 603 NEW+ STOCK 2026-05-09
Inquiry
S2021B inquiry
ANRIC Int'l Electronics Limited S2021B Semiconductor S2021B datasheet RoHS Compliant 42415 14+ Can Respond ASAP 2023-10-23
Inquiry
S2021B inquiry
ePartronics S2021B S2021B datasheet 4622 2025-07-25
Inquiry
S2021B inquiry
FAST IC ELECTRONICS CO.LTD S2021B AMC S2021B datasheet 428 09+ IN STOCK SUPPLY 2024-03-03
Inquiry
S2021B inquiry
Feng Sheng Electronics Co., Ltd. S2021B Rapid deliverywelcome to inqu S2021B datasheet PB FREE/Sincerely for your service 10000 2013+ INSTOCK 2013-09-21
Inquiry
S2021B inquiry
fenkey electronics co.,ltd S2021B S2021B datasheet 648945 13+ stock 2026-04-03
Inquiry
S2021B inquiry
fenyang electronics co.,ltd S2021B S2021B datasheet 648945 13+ stock 2026-04-03
Inquiry
S2021B inquiry
Forecast Electronics S2021B AMCC S2021B datasheet 201 2017-10-24
Inquiry
S2021B inquiry
Fengyangxin Technology ( HK ) Co.,Ltd S2021B S2021B datasheet 648945 13+ stock 2026-04-03
Inquiry
S2021B inquiry
Globalway components Sdn Bhd. S2021B N/A S2021B datasheet N/A 14388 NEW STOCK 2022-10-22
Inquiry
S2021B inquiry
Shenzhen Grand Power Trading Co.,Ltd S2021B N/A S2021B datasheet BGA 500 NEW STOCK 2017-07-04
Inquiry
S2021B inquiry
Semilex Electronics [ info@semi-lex.com ] S2021B IC S2021B datasheet NEW RoHS and More QTY 37150 16+ STK,Prompt delivery 2025-06-18
Inquiry
S2021B inquiry
Gusun Electronics Co.,LTD. S2021B N/A S2021B datasheet N/A 15623 NEWER+ STOCK 2026-05-09
Inquiry
S2021B inquiry
HAODE TECHNOLOGY CO.,LIMITED S2021B AMCC S2021B datasheet QFPBGA 1021 2022+ 2024-04-11
Inquiry
S2021B inquiry
Chaoxin Technology (HK) Limited S2021B See all 4 items AMCC S2021B datasheet 90 2017-05-15
Inquiry
S2021B inquiry
Timicomm Electronics Limited S2021B original S2021B datasheet RoHS Compliant 37854 17+/18+ New Stock,Always Ready 2023-10-23
Inquiry
S2021B inquiry
IC INTERNATIONAL TRADING CO. S2021B See all 3 items AMCC S2021B datasheet QFP 84210 12+ 2026-01-19
Inquiry
S2021B inquiry
HK SKY Electronics Co., Ltd S2021B AMCC S2021B datasheet QFP 980 07+ STOCK 2023-07-28
Inquiry
S2021B inquiry
Transcrui Microcircuit Corporation S2021B See all 2 items TI S2021B datasheet Original Parts&RoHS 63230 2019+ NEWSTOCK,HOT SALE!!! 2024-09-23
Inquiry
S2021B inquiry
Evatronix(HK) Electronics Trade Inc S2021B See all 2 items NS S2021B datasheet Original Parts, Quality excellent 50690 18+RoHS Instock,Rush delivery 2024-09-24
Inquiry
S2021B inquiry
IC Agent Electronics Ins S2021B See all 2 items AMCC S2021B datasheet QFP208 18000 2016+ Instock 2022-10-29
Inquiry
S2021B inquiry
ICHOME Industrial Co., Ltd. S2021B N/A S2021B datasheet N/A 14225 NEW+ INSTOCK 2026-05-09
Inquiry
S2021B inquiry
HONGKONG INDAXIM ELECTRONICS CO.,LTD S2021B S2021B datasheet TQFP 10000 10+ 2026-09-01
Inquiry
S2021B inquiry
Germany Electroince Distributor GmbH S2021B AMCC S2021B datasheet QFP208 25000 15-16+ Originalonstock 2020-05-29
Inquiry
S2021B inquiry
Arrow Global Co.,Ltd S2021B AMCC S2021B datasheet QFP208 25000 15-16+ Originalonstock 2020-01-18
Inquiry
S2021B inquiry
ANRIC ELECTRONICS CO.,LTD. S2021B See all 2 items Semiconductor S2021B datasheet RoHS Compliant 21763 16/17+ new and original in hand 2023-11-28
Inquiry
S2021B inquiry
Ameyic Electronics Corp. S2021B AMCC S2021B datasheet QFP 19900 15+ Pb-Free,Timely Response 2020-12-03
Inquiry
S2021B inquiry
JAK ELECTRONICS LIMITED S2021B Original S2021B datasheet 527 Stock 2019-10-30
Inquiry
S2021B inquiry
KANKEY ELECTRONICS CO.,LTD S2021B S2021B datasheet 13+ 648945 13+ stock 2026-04-03
Inquiry
S2021B inquiry
KAWAIC COMPONENTS CORP. S2021B N/A S2021B datasheet N/A 14150 NEW STOCK 2019-03-05
Inquiry
S2021B inquiry
Shenzhen Kelongsheng Limited S2021B See all 3 items AMCC S2021B datasheet QFP 2873 11+ New and original 2023-01-25
Inquiry
S2021B inquiry
KELONGSHENG (HK) TECHNOLOGY CO., LIMITED S2021B AMCC S2021B datasheet 11+ 320000 11+ 320000 2013-03-07
Inquiry
S2021B inquiry
KE XING ELECTRONICS CO.,LTD S2021B See all 2 items AMC S2021B datasheet 5445 16+ New & Original 2016-06-25
Inquiry
S2021B inquiry
Leading(HK) IC Distributor Limited S2021B AMCC S2021B datasheet QFP 1500 2018+ HOT SALE 2018-08-30
Inquiry
S2021B inquiry
Leading(HK) IC Distributor Limited S2021B AMCC S2021B datasheet QFP 1500 2013+ IN STOCK 2024-05-06
Inquiry
S2021B inquiry
LiHeng Technology (H.K)Technology Co.,LTD. S2021B AMCC S2021B datasheet QFP 300 08+ Instock 2021-07-07
Inquiry
S2021B inquiry
europe ic Electronics co.,ltd. S2021B SN S2021B datasheet 07+ 500 07+ in stock 2019-04-10
Inquiry
S2021B inquiry
European Union IC Industry Co. S2021B AMCC S2021B datasheet QFP208 125000 2016 Email.To.Us 2020-07-13
Inquiry
S2021B inquiry
X-PARTS Co ,Ltd S2021B S2021B datasheet 100 2015-06-29
Inquiry
S2021B inquiry
InMeiLe Technology S2021B AMC S2021B datasheet 25578 15+ New & Original 2022-10-15
Inquiry
S2021B inquiry
MIL-GRADE SEMICONDUCTORS PTE. LTD S2021B N/A S2021B datasheet N/A 15140 NEWD/C OWNSTOCK 2026-05-09
Inquiry
S2021B inquiry
Mujistu Electronic Pte Ltd. S2021B N/A S2021B datasheet N/A 14269 NEW STOCK 2026-05-09
Inquiry
S2021B inquiry
Nagano Chip Land S2021B S2021B datasheet 2274 2020-07-03
Inquiry
S2021B inquiry
NewChip Enterprises Pte, Ltd. S2021B N/A S2021B datasheet N/A 15150 NEW STOCK 2026-05-09
Inquiry
S2021B inquiry
NOVOT Electronics Trading Co., LTD. S2021B N/A S2021B datasheet N/A 14590 NEW+ STOCK 2026-05-09
Inquiry
S2021B inquiry
Oweis electronics company Limited S2021B AMCC S2021B datasheet QFP 300 08+ 2012-12-13
Inquiry
S2021B inquiry
pulkey electronics ( HK ) co.,ltd S2021B S2021B datasheet 13+ 648945 13+ stock 2026-04-03
Inquiry
S2021B inquiry
SANKEY SHARE CO.,LIMITED S2021B S2021B datasheet 648945 13+ stock 2020-04-08
Inquiry
S2021B inquiry
Philchip Technology Limited S2021B AMCC S2021B datasheet QFP 8315 2013+ quality 100 ,inquiry now 2015-04-16
Inquiry
S2021B inquiry
RANTLE EAST ELECTRONIC >>> www.IC2world.com S2021B See all 2 items AMCC S2021B datasheet QFP 577 ICsupplierinChina 2023-11-27
Inquiry
S2021B inquiry
Unitronix Electronics Limited S2021B AMCC S2021B datasheet QFP 26340 1512+ HOT SALE !!! 2023-10-23
Inquiry
S2021B inquiry
RightOne Electronics Trading Co., Ltd. S2021B AMCC S2021B datasheet QFP 1819 NEWD/C STOCK 2026-05-09
Inquiry
S2021B inquiry
MEGA IC ELECTRONICS.CO.LTD S2021B AMC S2021B datasheet 23445 14+ New & Original 2022-12-10
Inquiry
S2021B inquiry
SANKEY SHARE CO.,LTD S2021B AMCC S2021B datasheet 3927 10+ stock 2026-04-03
Inquiry
S2021B inquiry
sanyinic electronics ( h k ) co.,ltd S2021B S2021B datasheet 648945 13+ stock 2026-03-15
Inquiry
S2021B inquiry
SEMILOOK TECH. CO., LTD. S2021B N/A S2021B datasheet N/A 14225 NEW+ STOCK 2026-05-09
Inquiry
S2021B inquiry
SEMITONE CO.,LTD. S2021B N/A S2021B datasheet N/A 15640 NEW+ STOCK 2021-12-27
Inquiry
S2021B inquiry
SINLIN Electronics S2021B AMCC S2021B datasheet ic2ic@sinlin-e.com 1000 call Request For Quote Now 2022-09-09
Inquiry
S2021B inquiry
SINLIN ELECTRONICS LIMITED Authorized Distributor S2021B See all 2 items AMCC S2021B datasheet 12+ 10000 12+ call,60mins feedback 2018-09-07
Inquiry
S2021B inquiry
Starkey Technology (H.K) Co.,Ltd S2021B S2021B datasheet 648945 13+ stock 2026-03-15
Inquiry
S2021B inquiry
SUNGYUM SHARE CO.,LTD S2021B S2021B datasheet TQFP 8000 10+ 2017-01-16
Inquiry
S2021B inquiry
SUNMOON MICRO-ELECTRONICS CO., LTD. S2021B N/A S2021B datasheet N/A 17829 NEW+ STOCK 2026-05-09
Inquiry
S2021B inquiry
Sunway Components Co., Ltd. S2021B AMCC S2021B datasheet QFP 1198 NEWD/C STOCK 2026-05-09
Inquiry
S2021B inquiry
Excellence IC S2021B S2021B datasheet 25000 09+ 2023-07-28
Inquiry
S2021B inquiry
Kairong Electronics Ltd. S2021B s/n S2021B datasheet sop 500 2014+ 2026-09-11
Inquiry
S2021B inquiry
TAIKE Compoents Enterprise S2021B N/A S2021B datasheet N/A 14899 NEW+ STOCK 2026-05-09
Inquiry
S2021B inquiry
abc株式会社 S2021B S2021B datasheet 1577 2025-12-18
Inquiry
S2021B inquiry
Microtranik_Components.,Inc S2021B Distributor S2021B datasheet for more pls inquire us now 234490 17+ original instock,best quality 2026-09-29
Inquiry
S2021B inquiry
TIMICOMM ELECTRONICS LIMITED [sales@timicomm.com] S2021B S2021B datasheet RoHS Compliant 37854 14+ Good,Always Ready 2025-11-02
Inquiry
S2021B inquiry
UnitronixElectronics S2021B ELECTRONIC S2021B datasheet Pb-Free 25609 2014+ HOT SALE !!! 2025-08-12
Inquiry
S2021B inquiry
TRIPLE TECHNOLOGY COMPONENTS LIMITED S2021B S2021B datasheet 3200 2013-12-05
Inquiry
S2021B inquiry
UT TRADING CORPORATION S2021B AMCC S2021B datasheet QFP 529 03+ 2015-01-27
Inquiry
S2021B inquiry
UWIN COMPONENTS TRADING (HK) CO., LTD. S2021B AMCC S2021B datasheet QFP 5809 NEW+ STOCK 2026-05-09
Inquiry
S2021B inquiry
LEOSNA IC TRADING CO. S2021B Texas S2021B datasheet NEW & Original Parts 83740 19+RoHS Stock On Hand, best quality 2023-08-14
Inquiry
S2021B inquiry
WIGE(HK)ELECTRONICS CO.,LTD S2021B AMC S2021B datasheet 25578 15+ New & Original 2018-03-22
Inquiry
S2021B inquiry
FEDERAL INDUSTRY CO. S2021B See all 3 items AMCC S2021B datasheet QFP 3689 20+PB Pb-Free 2026-09-24
Inquiry
S2021B inquiry
XINXING(HK) ELECTRONICS CO.,LTD S2021B See all 2 items AMC S2021B datasheet 5445 16+ New & Original 2019-03-05
Inquiry
S2021B inquiry
Yiner(Shenzhen)Electronics Co., Ltd. S2021B AMCC S2021B datasheet 15+ 959500 15+ 959500 2017-06-10
Inquiry
S2021B inquiry
YUFO Electronics Limited S2021B AMCC S2021B datasheet QFP 527 9744/ china-stock 2023-11-08
Inquiry
S2021B inquiry
Philchip Electronics Co.,Ltd. S2021B AMCC S2021B datasheet QFP 9650 14+ instock,RoHS,original 2020-12-03
Inquiry
S2021B inquiry
1
S2021B Datasheet
Mfg Part # Datasheet Description
logo
C&K Components
S202 CK-COMPONENTS-S202 Datasheet
340Kb/5P
   Slide Switches
S202 CK-COMPONENTS-S202 Datasheet
340Kb/5P
   S Series Slide Switches
S202 CK-COMPONENTS-S202 Datasheet
679Kb/5P
   Slide Switches
logo
Microsemi Corporati...
S2020 MICROSEMI-S2020 Datasheet
112Kb/3P
   Silicon Power Rectifier
S2020 MICROSEMI-S2020 Datasheet
148Kb/2P
   SILICON POWER RECTIFIER
S2020 MICROSEMI-S2020 Datasheet
143Kb/2P
   Silicon Power Rectifier
logo
List of Unclassifed...
S20203101B ETC1-S20203101B Datasheet
386Kb/6P
   Slide Switches
S20203101BE ETC1-S20203101BE Datasheet
386Kb/6P
   Slide Switches
S20203101DB ETC1-S20203101DB Datasheet
386Kb/6P
   Slide Switches
S20203101DBE ETC1-S20203101DBE Datasheet
386Kb/6P
   Slide Switches
S20203101DQ ETC1-S20203101DQ Datasheet
386Kb/6P
   Slide Switches
S20203101DQE ETC1-S20203101DQE Datasheet
386Kb/6P
   Slide Switches
S20203101LB ETC1-S20203101LB Datasheet
386Kb/6P
   Slide Switches
S20203101LBE ETC1-S20203101LBE Datasheet
386Kb/6P
   Slide Switches
S20203101LQ ETC1-S20203101LQ Datasheet
386Kb/6P
   Slide Switches
S20203101LQE ETC1-S20203101LQE Datasheet
386Kb/6P
   Slide Switches
S20203101Q ETC1-S20203101Q Datasheet
386Kb/6P
   Slide Switches
S20203101QE ETC1-S20203101QE Datasheet
386Kb/6P
   Slide Switches
S20203103B ETC1-S20203103B Datasheet
386Kb/6P
   Slide Switches
S20203103BE ETC1-S20203103BE Datasheet
386Kb/6P
   Slide Switches
S20203103DB ETC1-S20203103DB Datasheet
386Kb/6P
   Slide Switches
S20203103DBE ETC1-S20203103DBE Datasheet
386Kb/6P
   Slide Switches
S20203103DQ ETC1-S20203103DQ Datasheet
386Kb/6P
   Slide Switches
S20203103DQE ETC1-S20203103DQE Datasheet
386Kb/6P
   Slide Switches
S20203103LB ETC1-S20203103LB Datasheet
386Kb/6P
   Slide Switches
S20203103LBE ETC1-S20203103LBE Datasheet
386Kb/6P
   Slide Switches
S20203103LQ ETC1-S20203103LQ Datasheet
386Kb/6P
   Slide Switches
S20203103LQE ETC1-S20203103LQE Datasheet
386Kb/6P
   Slide Switches
S20203103Q ETC1-S20203103Q Datasheet
386Kb/6P
   Slide Switches
S20203103QE ETC1-S20203103QE Datasheet
386Kb/6P
   Slide Switches