Cap alum poly 2200uf 20% 4v smd - Allicdata Electronics

Related Categories

< 9 10 11 12 13 >

Allicdata Part#	Mft.Part#	Company	Spec.	QTY.	Pricing(USD)
Z6437TR-ND	G3VM-61ER(TR)	Omron Electronics Inc-EMC Div	View more Series: G3VM Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.33VDC Voltage - Load: 0V ~ 60V Load Current: 2.5A On-State Resistance (Max): 100 mOhms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	1500+: $3.9064
AQY280EHAZ-ND	AQY280EHAZ	Panasonic Electric Works	View more Series: PhotoMOS AQY Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 350V Load Current: 130mA On-State Resistance (Max): 25 Ohms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	1000 Order	1000+: $0.5998
G3VM-61PR1(TR)- ND	G3VM-61PR1(TR)	Omron Electronics Inc-EMC Div	View more Series: G3VM Packaging: Tape & Reel (TR) Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.15VDC Voltage - Load: 0V ~ 60V Load Current: 120mA On-State Resistance (Max): 15 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.128", 3.25mm) Supplier Device Package: 4-USOP	1000 Order	1+: $0
306-1359-ND	CS147	Coto Technology	View more Series: COTOMOS Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.37VDC Voltage - Load: 0V ~ 80V Load Current: 2A On-State Resistance (Max): 160 mOhms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	467 Order	1+: $3.7107 10+: $3.4789 25+: $3.0925 50+: $2.9378 100+: $2.7832 250+: $2.4739 500+: $2.3193
255-6021-ND	AQV217A	Panasonic Electric Works	View more Series: PhotoMOS AQV Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 200V Load Current: 180mA On-State Resistance (Max): 15 Ohms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	50 Order	1+: $3.2634 10+: $3.0618 25+: $2.7216 50+: $2.5855 100+: $2.4494 250+: $2.1773 500+: $2.0412 1000+: $1.9051
CPC1943GSTR-ND	CPC1943GSTR	IXYS Integrated Circuits Division	View more Series: CPC Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, Zero Cross Voltage - Input: 1.2VDC Voltage - Load: 0V ~ 400V Load Current: 500mA Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	1000+: $1.039
HSR412SR2-ND	HSR412SR2	ON Semiconductor	View more Series: HSR412 Packaging: Tape & Reel (TR) Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.6VDC Voltage - Load: 0V ~ 400V Load Current: 140mA On-State Resistance (Max): 27 Ohms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	1+: $0
PS7801J-1A-F3-A TR-ND	PS7801J-1A-F3-A	CEL	View more Series: PS, OCMOS Packaging: Tape & Reel (TR) Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.1VDC Voltage - Load: 0V ~ 20V Load Current: 160mA On-State Resistance (Max): 3.2 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.165", 4.20mm) Supplier Device Package: 4-Ultra Small Flatlead	1000 Order	1+: $0
G3VM-21LR11(TR) -ND	G3VM-21LR11(TR)	Omron Electronics Inc-EMC Div	View more Series: G3VM Packaging: Tape & Reel (TR) Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.15VDC Voltage - Load: 0V ~ 20V Load Current: 900mA On-State Resistance (Max): 220 mOhms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.165", 4.20mm) Supplier Device Package: 4-SSOP	1000 Order	1+: $0
G3VM41PR5-ND	G3VM41PR5	Omron Electronics Inc-EMC Div	View more Series: G3VM Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.15VDC Voltage - Load: 0V ~ 40V Load Current: 300mA On-State Resistance (Max): 1.5 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.128", 3.25mm) Supplier Device Package: 4-USOP	1000 Order	1+: $0
CLA272TR-ND	CPC1510GSTR	IXYS Integrated Circuits Division	View more Series: CPC, OptoMOS Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.29VDC Voltage - Load: 0V ~ 250V Load Current: 200mA On-State Resistance (Max): 15 Ohms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	6000 Order	1000+: $0.7856 2000+: $0.7314 5000+: $0.7043
TLP3409S(TPETR- ND	TLP3409S(TP,E	Toshiba Semiconductor and Storage	View more Series: TLP3409S Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.27VDC Voltage - Load: 0V ~ 100V Load Current: 650mA On-State Resistance (Max): 600 mOhms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.079", 2.00mm) Supplier Device Package: S-VSON4	1000 Order	2500+: $1.5374
TLP240D(LF1F-ND	TLP240D(LF1,F	Toshiba Semiconductor and Storage	View more Series: TLP240D Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.27VDC Voltage - Load: 0V ~ 200V Load Current: 250mA On-State Resistance (Max): 8 Ohms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	1000 Order	100+: $0.7672
CLA245TR-ND	LCA100STR	IXYS Integrated Circuits Division	View more Series: LCA, OptoMOS Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.2VDC Voltage - Load: 0V ~ 350V Load Current: 120mA On-State Resistance (Max): 25 Ohms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	--
AQY221R2MW-ND	AQY221R2MW	Panasonic Electric Works	View more Series: PhotoMOS AQY Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC (RF) Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 40V Load Current: 250mA On-State Resistance (Max): 1.25 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.116", 2.95mm) Supplier Device Package: 4-SON	1000 Order	3500+: $2.6767
255-5761-2-ND	AQV255G3AZ	Panasonic Electric Works	View more Series: PhotoMOS AQV Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.32VDC Voltage - Load: 0V ~ 100V Load Current: 2.4A On-State Resistance (Max): 120 mOhms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	1000+: $3.8279
TLP3231FTR-ND	TLP3231(TP15,F)	Toshiba Semiconductor and Storage	View more Series: TLP3231 Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.15VDC Voltage - Load: 0V ~ 20V Load Current: 450mA On-State Resistance (Max): 1.2 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.165", 4.20mm) Supplier Device Package: 4-SSOP	1000 Order	1500+: $0.8732 3000+: $0.8576
255-5858-2-ND	AQW212EHAZ	Panasonic Electric Works	View more Series: PhotoMOS AQW Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: DPST-NO (2 Form A) Output Type: AC, DC Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 60V Load Current: 500mA On-State Resistance (Max): 2.5 Ohms Termination Style: Gull Wing Package / Case: 8-SMD (0.300", 7.62mm) Supplier Device Package: 8-SMD	1000 Order	--
AQY216EHAX-ND	AQY216EHAX	Panasonic Electric Works	View more Series: PhotoMOS AQY Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 600V Load Current: 50mA On-State Resistance (Max): 120 Ohms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	1000 Order	--
TLP3555(TP1F)-N D	TLP3555(TP1,F)	Toshiba Semiconductor and Storage	View more Series: TLP3555 Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.33VDC Voltage - Load: 0V ~ 60V Load Current: 2A On-State Resistance (Max): 200 mOhms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	1000 Order	1500+: $1.1642
AQY221FR2VW-ND	AQY221FR2VW	Panasonic Electric Works	View more Series: PhotoMOS AQY Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC (RF) Voltage - Input: 1.3VDC Voltage - Load: 0V ~ 40V Load Current: 250mA On-State Resistance (Max): 1.25 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.175", 4.45mm) Supplier Device Package: 4-SSOP	1000 Order	3500+: $3.3004
HSR312SR2-ND	HSR312SR2	ON Semiconductor	View more Series: HSR312 Packaging: Tape & Reel (TR) Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.6VDC Voltage - Load: 0V ~ 250V Load Current: 190mA On-State Resistance (Max): 10 Ohms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	--
G3VM-81LR(TR)-N D	G3VM-81LR(TR)	Omron Electronics Inc-EMC Div	View more Series: G3VM Packaging: Tape & Reel (TR) Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.15VDC Voltage - Load: 0V ~ 80V Load Current: 120mA On-State Resistance (Max): 12 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.165", 4.20mm) Supplier Device Package: 4-SSOP	1000 Order	1+: $0
TLP240D(TP1FTR- ND	TLP240D(TP1,F	Toshiba Semiconductor and Storage	View more Series: TLP240D Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.27VDC Voltage - Load: 0V ~ 200V Load Current: 250mA On-State Resistance (Max): 8 Ohms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	3000 Order	1500+: $0.4773 3000+: $0.4535 7500+: $0.4432 10500+: $0.4262
TLP3543A(TP1FTR -ND	TLP3543A(TP1,F	Toshiba Semiconductor and Storage	View more Series: TLP3543A Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.64VDC Voltage - Load: 0V ~ 30V Load Current: 5A On-State Resistance (Max): 40 mOhms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	3000 Order	1500+: $1.3142 3000+: $1.2907
255-1566-5-ND	AQY277A	Panasonic Electric Works	View more Series: PhotoMOS AQY Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.16VDC Voltage - Load: 0V ~ 200V Load Current: 650mA On-State Resistance (Max): 1.1 Ohms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	578 Order	--
306-1416-2-ND	CS128TR	Coto Technology	View more Series: COTOMOS Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.37VDC Voltage - Load: 0V ~ 40V Load Current: 4.5A On-State Resistance (Max): 50 mOhms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	1000+: $2.4408
CPC1963GS-ND	CPC1963GS	IXYS Integrated Circuits Division	View more Series: CPC Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, Zero Cross Voltage - Input: 1.2VDC Voltage - Load: 0V ~ 600V Load Current: 500mA Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	250+: $1.4452
AQV259AX-ND	AQV259AX	Panasonic Electric Works	View more Series: PhotoMOS AQV Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 1000V Load Current: 30mA On-State Resistance (Max): 200 Ohms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	1000+: $2.3461
AQY221N3T-ND	AQY221N3T	Panasonic Electric Works	View more Series: PhotoMOS AQY2 Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC (RF) Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 25V Load Current: 150mA On-State Resistance (Max): 7.5 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.071", 1.80mm) Supplier Device Package: 4-VSSOP	1000 Order	200+: $5.6549
255-1563-5-ND	AQY272A	Panasonic Electric Works	View more Series: PhotoMOS AQY Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.16VDC Voltage - Load: 0V ~ 60V Load Current: 2A On-State Resistance (Max): 180 mOhms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	1406 Order	--
Z2705-ND	G3VM-WFL	Omron Electronics Inc-EMC Div	View more Series: G3VM Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) x 2 Output Type: AC, DC Voltage - Input: 1.15VDC Voltage - Load: 0V ~ 350V Load Current: 120mA On-State Resistance (Max): 35 Ohms Termination Style: Gull Wing Package / Case: 8-SMD (0.300", 7.62mm) Supplier Device Package: 8-SMD	648 Order	1+: $3.1185 10+: $2.9245 25+: $2.5994 50+: $2.4694 100+: $2.3393 250+: $2.0794 500+: $1.9494 1000+: $1.8195
TLP3250TP15FTR- ND	TLP3250(TP15,F)	Toshiba Semiconductor and Storage	View more Series: TLP3250 Packaging: Tape & Reel (TR) Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.3VDC Voltage - Load: 0V ~ 20V Load Current: 200mA On-State Resistance (Max): 5 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.165", 4.20mm) Supplier Device Package: 4-SSOP	1000 Order	1500+: $1.323 3000+: $1.2994
TLP240GA(LF1F-N D	TLP240GA(LF1,F	Toshiba Semiconductor and Storage	View more Series: TLP240GA Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.27VDC Voltage - Load: 0V ~ 400V Load Current: 120mA On-State Resistance (Max): 35 Ohms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	1000 Order	100+: $0.7346
PLA190S-ND	PLA190S	IXYS Integrated Circuits Division	View more Series: PLA, OptoMOS Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.2VDC Voltage - Load: 0V ~ 400V Load Current: 150mA On-State Resistance (Max): 22 Ohms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	250+: $1.7016
Z2702-ND	G3VM-81LR	Omron Electronics Inc-EMC Div	View more Series: G3VM Packaging: Tube Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.15VDC Voltage - Load: 0V ~ 80V Load Current: 120mA On-State Resistance (Max): 12 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.165", 4.20mm) Supplier Device Package: 4-SSOP	1000 Order	--
PS7801P-1A-A-ND	PS7801P-1A-A	CEL	View more Series: PS, OCMOS Packaging: Tube Part Status: Obsolete Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.1VDC Voltage - Load: 0V ~ 40V Load Current: 150mA On-State Resistance (Max): 1.8 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.165", 4.20mm) Supplier Device Package: 4-Ultra Small Flatlead	1000 Order	1+: $0
255-4069-5-ND	AQY211EHA	Panasonic Electric Works	View more Series: PhotoMOS AQY Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 30V Load Current: 1A On-State Resistance (Max): 500 mOhms Termination Style: Gull Wing Package / Case: 4-SMD (0.300", 7.62mm) Supplier Device Package: 4-SMD	655 Order	--
255-2389-ND	AQY221N3M	Panasonic Electric Works	View more Series: PhotoMOS AQY Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC (RF) Voltage - Input: 1.14VDC Voltage - Load: 0V ~ 25V Load Current: 150mA On-State Resistance (Max): 7.5 Ohms Termination Style: SMD (SMT) Tab Package / Case: 4-SMD (0.116", 2.95mm) Supplier Device Package: 4-SON	4382 Order	1+: $5.2605 10+: $4.9329 25+: $4.3848 50+: $4.1656 100+: $3.9463 250+: $3.5078 500+: $3.2886 1000+: $3.0694
LCA715S-ND	LCA715S	IXYS Integrated Circuits Division	View more Series: LCA, OptoMOS Packaging: Tube Part Status: Active Mounting Type: Surface Mount Circuit: SPST-NO (1 Form A) Output Type: AC, DC Voltage - Input: 1.2VDC Voltage - Load: 0V ~ 60V Load Current: 2.2A On-State Resistance (Max): 150 mOhms Termination Style: Gull Wing Package / Case: 6-SMD (0.300", 7.62mm) Supplier Device Package: 6-SMD	1000 Order	250+: $2.3427

< 9 10 11 12 13 >

Hot Searches: cap alum poly 2200uf 20% 4v smd cap alum poly 2200uf 20% 4v cap alum poly 560uf 20% 4v smd cap alum poly 680uf 20% 4v smd cap alum poly 1500uf 20% 4v smd cap alum poly 470uf 20% 4v smd cap alum poly 330uf 20% 4v smd cap alum poly 1800uf 20% 4v smd cap alum poly 150uf 20% 4v smd cap alum poly 33uf 20% 4v smd cap alum poly 1200uf 20% 4v smd cap alum poly 39uf 20% 4v smd cap alum poly 390uf 20% 4v smd cap alum poly 56uf 20% 4v smd cap alum poly 120uf 20% 4v smd cap alum poly 100uf 20% 4v smd cap alum poly 180uf 20% 4v smd cap alum poly 270uf 20% 4v smd cap alum poly 68uf 20% 4v smd cap alum poly 3300uf 20% 4v smd

Search Result:cap alum poly 2200uf 20% 4v smd

Related Categories