Signal Conditioning – Mouser Singapore

.hide-partial { max-height: none; } .show-more { display: none; }

High-Frequency Products

TAIYO YUDEN High-Frequency Products include SAW/FBAR devices, chip antennas, and multilayer ceramic devices (filters, diplexers, baluns). These components optimize data transmission through high attenuation and low insertion loss for efficient frequency utilization. TAIYO YUDEN High-Frequency Products feature compact package sizes with high performance and low interference for the latest designs in BLUETOOTH®, Wireless LAN, Digital TV, GPS, and telecommunication applications.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 211

Applied Filters:

Product

Frequency

Frequency Range

Bandwidth

Impedance

Termination Style

Package/Case

Minimum Operating Temperature

Maximum Operating Temperature

Series

Qualification

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Signal Conditioning 1.5dB 50Ohms Ceramic Filters

TSH1N18D2G49LS0FBT
TAIYO YUDEN
1: $1.52
8,965In Stock

Mfr. Part No.
TSH1N18D2G49LS0FBT

Mouser Part No
963-TSH1N18D2G49LS0F

TAIYO YUDEN

Signal Conditioning 1.5dB 50Ohms Ceramic Filters

Learn More

Datasheet

8,965In Stock

Cut Tape

$1.52

$1.24

$1.08

$1.01

Reel

$0.718

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

High Pass Filters

2.3 GHz to 2.69 GHz

50 Ohms

SMD/SMT

1.6 mm x 0.8 mm

- 40 C

+ 85 C

TSH1

Reel, Cut Tape, MouseReel

Signal Conditioning 0.5dB 50Ohms Ceramic Filters

TSL1N18D1G86LC0EDT
TAIYO YUDEN
1: $1.40
7,242In Stock

Mfr. Part No.
TSL1N18D1G86LC0EDT

Mouser Part No
963-TSL1N18D1G86LC0E

TAIYO YUDEN

Signal Conditioning 0.5dB 50Ohms Ceramic Filters

Learn More

Datasheet

7,242In Stock

Cut Tape

$1.40

$1.14

$0.99

$0.93

Reel

$0.69

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Low Pass Filters

1.71 GHz to 2.025 GHz

50 Ohms

SMD/SMT

1.6 mm x 0.8 mm

- 40 C

+ 85 C

TSL1

Reel, Cut Tape, MouseReel

Signal Conditioning 1.5dB 50Ohms Ceramic Filters

TSB1N18D5G53LV0HBT
TAIYO YUDEN
1: $1.52
9,758In Stock

Mfr. Part No.
TSB1N18D5G53LV0HBT

Mouser Part No
963-TSB1N18D5G53LV0H

TAIYO YUDEN

Signal Conditioning 1.5dB 50Ohms Ceramic Filters

Learn More

Datasheet

9,758In Stock

Cut Tape

$1.52

$1.24

$1.08

$1.01

Reel

$0.76

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Bandpass Filters

5.15 GHz to 5.925 GHz

50 Ohms

SMD/SMT

1.6 mm x 0.8 mm

- 40 C

+ 85 C

TSB1

Reel, Cut Tape, MouseReel

Signal Conditioning 0.75dB 50Ohms Ceramic Filters

TSL1N15H1G72LV0FLT
TAIYO YUDEN
1: $0.884
19,995In Stock

Mfr. Part No.
TSL1N15H1G72LV0FLT

Mouser Part No
963-TSL1N15H1G72LV0F

TAIYO YUDEN

Signal Conditioning 0.75dB 50Ohms Ceramic Filters

Learn More

Datasheet

19,995In Stock

Cut Tape

$0.884

$0.703

$0.608

$0.53

View

Reel

$0.335

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

Signal Conditioning

Low Pass Filters

1.426 GHz to 2.2 GHz

50 Ohms

SMD/SMT

- 40 C

+ 85 C

TSL1

Reel, Cut Tape, MouseReel

Signal Conditioning 960MHz 1.9dB 50Ohms Bandpass Filters

TSB1N18D845MLV0D9T
TAIYO YUDEN
1: $1.44
3,977In Stock
5,000Expected 13/10/2026

Mfr. Part No.
TSB1N18D845MLV0D9T

Mouser Part No
963-TSB1N18D845MLV0D

TAIYO YUDEN

Signal Conditioning 960MHz 1.9dB 50Ohms Bandpass Filters

Learn More

Datasheet

3,977In Stock

5,000Expected 13/10/2026

Cut Tape

$1.44

$1.28

$0.911

$0.857

View

Reel

$0.514

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Bandpass Filters

960 MHz

50 Ohms

SMD/SMT

0603 (1608 metric)

- 40 C

+ 85 C

TSB1

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSJCSRYH782MP1H6-AZ

F5QA876M5M2QP-J
TAIYO YUDEN
1: $0.707
8,753In Stock

Mfr. Part No.
F5QA876M5M2QP-J

Mouser Part No
963-F5QA876M5M2QP-J

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSJCSRYH782MP1H6-AZ

Datasheet

8,753In Stock

Cut Tape

$0.707

$0.564

$0.498

$0.454

Reel

$0.33

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

SAW Filters

876.5 MHz

50 Ohms

SMD/SMT

1.1 mm x 0.9 mm x 0.5 mm

- 30 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSGCSQ5N2G01G2YA-AJ

F6FC1G197H4PF-J
TAIYO YUDEN
1: $1.29
4,827In Stock

Mfr. Part No.
F6FC1G197H4PF-J

Mouser Part No
963-F6FC1G197H4PF-J

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSGCSQ5N2G01G2YA-AJ

4,827In Stock

Cut Tape

$1.29

$1.05

$0.914

$0.86

Reel

$0.608

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

SAW Filters

1.197 GHz

50 Ohms

SMD/SMT

1.1 mm x 0.9 mm x 0.44 mm

- 30 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning 963-TSB1N15H2G45NS02 RPLCMT PN

FI105B245024-T
TAIYO YUDEN
1: $0.979
19,870In Stock

Mfr. Part No.
FI105B245024-T

Mouser Part No
963-FI105B245024-T

TAIYO YUDEN

Signal Conditioning 963-TSB1N15H2G45NS02 RPLCMT PN

Datasheet

19,870In Stock

Cut Tape

$0.979

$0.794

$0.69

$0.649

View

Reel

$0.423

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

Signal Conditioning

Bandpass Filters

2.45 GHz

100 MHz

50 Ohms

SMD/SMT

0402 (1005 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSSCSR1N2G44H4PE-AJ

FI168K1687AA-T
TAIYO YUDEN
1: $1.55
4,653In Stock

Mfr. Part No.
FI168K1687AA-T

Mouser Part No
963-FI168K1687AA-T

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSSCSR1N2G44H4PE-AJ

Datasheet

4,653In Stock

Cut Tape

$1.55

$1.23

$1.08

$0.996

Reel

$0.67

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Couplers

698 MHz to 2.69 GHz

50 Ohms

SMD/SMT

0603 (1608 metric)

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning 617MHz5GHzto2200MHz,2.5GHzto SAW Diplexers

TSD1N21A1G95LV0ENT
TAIYO YUDEN
1: $1.48
3,124In Stock

Mfr. Part No.
TSD1N21A1G95LV0ENT

Mouser Part No
963-TSD1N21A1G95LV0E

TAIYO YUDEN

Signal Conditioning 617MHz5GHzto2200MHz,2.5GHzto SAW Diplexers

Learn More

Datasheet

3,124In Stock

Cut Tape

$1.48

$1.20

$1.04

$0.981

Reel

$0.658

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Signal Conditioning

SAW Diplexers

2.2 GHz, 5 GHz

617 MHz to 2.2 GHz, 2.496 GHz to 5 GHz

50 Ohms

SMD/SMT

0805 (2012 metric)

- 40 C

+ 85 C

TSD1

Reel, Cut Tape, MouseReel

Signal Conditioning 960MHz 0.9dB 50Ohms Low Pass Filters - LPF

TSL1N15H829MLS0GZT
TAIYO YUDEN
1: $0.979
8,219In Stock

Mfr. Part No.
TSL1N15H829MLS0GZT

Mouser Part No
963-TSL1N15H829MLS0G

TAIYO YUDEN

Signal Conditioning 960MHz 0.9dB 50Ohms Low Pass Filters - LPF

Learn More

Datasheet

8,219In Stock

Cut Tape

$0.979

$0.794

$0.69

$0.649

View

Reel

$0.431

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

Signal Conditioning

Low Pass Filters

617 MHz to 960 MHz

50 Ohms

SMD/SMT

0402 (1005 metric)

- 40 C

+ 85 C

TSL1

Reel, Cut Tape, MouseReel

Signal Conditioning 5.925GHz 1.2dB 50Ohms Bandpass Filters - BPF

TSB1N18D5G53LV0FWT
TAIYO YUDEN
1: $1.44
4,643In Stock

Mfr. Part No.
TSB1N18D5G53LV0FWT

Mouser Part No
963-TSB1N18D5G53LV0F

TAIYO YUDEN

Signal Conditioning 5.925GHz 1.2dB 50Ohms Bandpass Filters - BPF

Learn More

Datasheet

4,643In Stock

Cut Tape

$1.44

$1.28

$0.911

$0.857

View

Reel

$0.507

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Bandpass Filters

5.925 GHz

50 Ohms

SMD/SMT

0603 (1608 metric)

- 40 C

+ 85 C

TSB1

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSSCSP1N2G59H4PD-AJ

F6FC2G017H4PC-J
TAIYO YUDEN
1: $1.29
4,077In Stock

Mfr. Part No.
F6FC2G017H4PC-J

Mouser Part No
963-F6FC2G017H4PC-J

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSSCSP1N2G59H4PD-AJ

Datasheet

4,077In Stock

Cut Tape

$1.29

$1.05

$0.914

$0.86

Reel

$0.608

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

SAW Filters

2.017 GHz

50 Ohms

SMD/SMT

1.1 mm x 0.9 mm x 0.44 mm

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE TSB1N18D2G00LV0H7T

FI168B0845D9-T
TAIYO YUDEN
1: $1.14
19,672In Stock

Mfr. Part No.
FI168B0845D9-T

Mouser Part No
963-FI168B0845D9-T

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE TSB1N18D2G00LV0H7T

Datasheet

19,672In Stock

Cut Tape

$1.14

$0.934

$0.811

$0.763

Reel

$0.536

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Bandpass Filters

729 MHz to 960 MHz

50 Ohms

SMD/SMT

0603 (1608 metric)

- 40 C

+ 85 C

AEC-Q200

Reel, Cut Tape, MouseReel

Signal Conditioning 829MHz,1.4GHzto2.7GHz,3.3GHzto5.9GHz SAW Triplexers

TST1N22D829MLV0H2T
TAIYO YUDEN
1: $2.23
2,429In Stock

Mfr. Part No.
TST1N22D829MLV0H2T

Mouser Part No
963-TST1N22D829MLV0H

TAIYO YUDEN

Signal Conditioning 829MHz,1.4GHzto2.7GHz,3.3GHzto5.9GHz SAW Triplexers

Learn More

Datasheet

2,429In Stock

Cut Tape

$2.23

$1.74

$1.55

$1.37

Reel

$0.864

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Signal Conditioning

Triplexers

829 MHz, 1.4 GHz to 2.7 GHz, 3.3 GHz to 5.9 GHz

TST1

Reel, Cut Tape, MouseReel

Signal Conditioning 2.69GHz 0.5dB 50Ohms Low Pass Filters

TSL1N18D1G68LS0G6T
TAIYO YUDEN
1: $1.31
4,585In Stock

Mfr. Part No.
TSL1N18D1G68LS0G6T

Mouser Part No
963-TSL1N18D1G68LS0G

TAIYO YUDEN

Signal Conditioning 2.69GHz 0.5dB 50Ohms Low Pass Filters

Learn More

Datasheet

4,585In Stock

Cut Tape

$1.31

$1.17

$0.828

$0.778

View

Reel

$0.461

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Low Pass Filters

673 MHz to 2.69 GHz

50 Ohms

SMD/SMT

0603 (1608 metric)

- 40 C

+ 90 C

TSL1

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE TSD1N18D2G45NS030T

FI168L2200G9-T
TAIYO YUDEN
1: $1.18
4,395In Stock

Mfr. Part No.
FI168L2200G9-T

Mouser Part No
963-FI168L2200G9-T

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE TSD1N18D2G45NS030T

Datasheet

4,395In Stock

Cut Tape

$1.18

$1.01

$0.787

$0.74

Reel

$0.488

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Low Pass Filters

1.7 GHz to 2.17 GHz, 2.17 GHz to 2.5 GHz, 2.5 GHz to 2.7 GHz

50 Ohms

SMD/SMT

0603 (1608 metric)

- 30 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning 3.75GHz Bandpass Filters

TSB1N21D3G75LV0EQT
TAIYO YUDEN
1: $1.36
4,331In Stock

Mfr. Part No.
TSB1N21D3G75LV0EQT

Mouser Part No
963-TSB1N21D3G75LV0E

TAIYO YUDEN

Signal Conditioning 3.75GHz Bandpass Filters

Learn More

Datasheet

4,331In Stock

Cut Tape

$1.36

$1.11

$0.963

$0.906

Reel

$0.641

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Bandpass Filters

3.75 GHz

TSB1

Reel, Cut Tape, MouseReel

Signal Conditioning 2.69GHz 0.15dB 50Ohms Low Pass Filters

TSL1N18D1G68LV0DTT
TAIYO YUDEN
1: $1.31
4,864In Stock

Mfr. Part No.
TSL1N18D1G68LV0DTT

Mouser Part No
963-TSL1N18D1G68LV0D

TAIYO YUDEN

Signal Conditioning 2.69GHz 0.15dB 50Ohms Low Pass Filters

Learn More

Datasheet

4,864In Stock

Cut Tape

$1.31

$1.17

$0.828

$0.778

View

Reel

$0.461

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Signal Conditioning

Low Pass Filters

617 MHz to 2.69 GHz

50 Ohms

SMD/SMT

0603 (1608 metric)

- 40 C

+ 85 C

TSL1

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE MSASE042SCG221JWNA01

D6HQ2G655DP02-Z
TAIYO YUDEN
1: $6.13
1,057In Stock

Mfr. Part No.
D6HQ2G655DP02-Z

Mouser Part No
963-D6HQ2G655DP02-Z

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE MSASE042SCG221JWNA01

Datasheet

1,057In Stock

Cut Tape

$6.13

$5.02

$4.53

$4.11

View

Reel

$3.14

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Signal Conditioning

SAW Duplexers

1 GHz to 5 GHz

50 Ohms

SMD/SMT

1.8 mm x 1.4 mm x 0.54 mm

- 30 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSDCSR8T2G14K2A4-AZ

D6DA2G132K2D4-Z
TAIYO YUDEN
1: $2.62
2,408In Stock

Mfr. Part No.
D6DA2G132K2D4-Z

Mouser Part No
963-D6DA2G132K2D4-Z

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSDCSR8T2G14K2A4-AZ

Datasheet

2,408In Stock

Cut Tape

$2.62

$2.15

$1.90

$1.75

Reel

$1.24

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Signal Conditioning

SAW Duplexers

2.132 GHz

SMD/SMT

1.8 mm x 1.4 mm x 0.5 mm

- 25 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSDCSR8N2G15K2T2-AZ

D6DA1G842K2C7-Z
TAIYO YUDEN
1: $3.18
3,053In Stock

Mfr. Part No.
D6DA1G842K2C7-Z

Mouser Part No
963-D6DA1G842K2C7-Z

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSDCSR8N2G15K2T2-AZ

Datasheet

3,053In Stock

Cut Tape

$3.18

$2.76

$2.39

$2.26

Reel

$1.70

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Signal Conditioning

SAW Duplexers

1.842 GHz

50 Ohms

SMD/SMT

1.8 mm x 1.4 mm x 0.38 mm

- 30 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSGCSR5T2G01M2RF-AJ

F6HQ2G593AP31-Z
TAIYO YUDEN
1: $5.59
910In Stock

Mfr. Part No.
F6HQ2G593AP31-Z

Mouser Part No
963-F6HQ2G593AP31-Z

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSGCSR5T2G01M2RF-AJ

Datasheet

910In Stock

Cut Tape

$5.59

$4.56

$3.96

$3.73

View

Reel

$2.75

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Signal Conditioning

SAW Filters

1 GHz to 5 GHz

50 Ohms

SMD/SMT

1.8 mm x 1.4 mm x 0.57 mm

- 30 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSDCSRZT876MP3UZ-AZ

D5DA942M5K2G6-Z
TAIYO YUDEN
1: $2.37
2,898In Stock

Mfr. Part No.
D5DA942M5K2G6-Z

Mouser Part No
963-D5DA942M5K2G6-Z

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSDCSRZT876MP3UZ-AZ

Datasheet

2,898In Stock

Cut Tape

$2.37

$2.04

$1.78

$1.69

Reel

$1.24

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Signal Conditioning

SAW Duplexers

942.5 MHz

50 Ohms

SMD/SMT

1.8 mm x 1.4 mm x 0.6 mm

- 20 C

+ 85 C

Reel, Cut Tape, MouseReel

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSWCSR8H2G65BP11-AZ

D6DA1G960K2B1-Z
TAIYO YUDEN
1: $3.39
1,565In Stock

Mfr. Part No.
D6DA1G960K2B1-Z

Mouser Part No
963-D6DA1G960K2B1-Z

TAIYO YUDEN

Signal Conditioning PLEASE SEE SUGGESTED ALTERNATE FSWCSR8H2G65BP11-AZ

Datasheet

1,565In Stock

Cut Tape

$3.39

$2.98

$2.69

$2.45

View

Reel

$1.54

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Signal Conditioning

SAW Duplexers

1.96 GHz

50 Ohms

SMD/SMT

1.8 mm x 1.4 mm x 0.57 mm

- 30 C

+ 85 C

Reel, Cut Tape, MouseReel

High-Frequency Products

Customer Service Office

Company

Resources

Support

2.45 MHz
450 MHz to 960 MHz, 1.427 GHz to 2.69 GHz, 3.3 GHz to 5.95 GHz
617 MHz to 2.69 GHz
617 MHz to 960 MHz
620 MHz
628 MHz
673 MHz to 2.69 GHz
698 MHz to 2.69 GHz
698 MHz to 894 MHz, 880 MHz to 960 MHz
699 MHz to 2.69 GHz
699 MHz to 5 GHz
710 MHz
722.5 MHz
729 MHz to 960 MHz
737 MHz
737.5 MHz
740 MHz
748 MHz
751 MHz
763 MHz

0402 (1005 metric)
0603 (1608 metric)
0805 (2012 metric)
1.1 mm x 0.9 mm x 0.44 mm
1.1 mm x 0.9 mm x 0.5 mm
1.4 mm x 1 mm x 0.5 mm
1.5 mm x 1.1 mm x 0.5 mm
1.6 mm x 0.8 mm
1.6 mm x 0.8 mm x 0.5 mm
1.8 mm x 1.4 mm x 0.38 mm
1.8 mm x 1.4 mm x 0.44 mm
1.8 mm x 1.4 mm x 0.47 mm
1.8 mm x 1.4 mm x 0.54 mm
1.8 mm x 1.4 mm x 0.57 mm
1.8 mm x 1.4 mm x 0.5 mm
1.8 mm x 1.4 mm x 0.6 mm
1008 (2520 metric)
2 mm x 1.25 mm
2 mm x 1.6 mm x 0.5 mm
2 mm x 1.6 mm x 0.6 mm

D5
D6
F5
F6
FI
FSDC
FSFC
FSGC
FSHC
FSJC
FSKC
FSSC
FSWC
G6
TSB1
TSC1
TSC4
TSD1
TSH1
TSL1