Nº de pieza | SFH618A-3 |
---|---|
Fabricantes | Vishay Semiconductor Opto Division |
Descripción | OPTOISOLATOR 5.3KV TRANS 4-DIP |
Hoja de datos | |
Paquete | 4-DIP (0.300", 7.62mm) |
ECAD | |
En existencias | 312.888 piece(s) |
Precio unitario | Request a Quote |
Plazo de ejecución | Se puede enviar inmediatamente |
Tiempo estimado de entrega | dic 23 - dic 28 (Elija envío expedito) |
Pedir presupuesto |
|
Métodos de pago | |
Servicios de entrega |
Garantizamos el 100% de satisfacción del cliente.
Nuestro experimentado equipo de ventas y nuestro equipo de soporte técnico respaldan nuestros servicios para satisfacer a todos nuestros clientes.
Ofrecemos 90 días de garantía.
Si los artículos que recibió no tenían la calidad perfecta, seremos responsables de su reembolso o reemplazo, pero los artículos deben devolverse en su estado original.
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3SMT&R D# V72:2272_22608131 |
Isocom Components |
DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD T/R RoHS: Compliant
|
0 |
SFH618A-3 D# V99:2348_09172033 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP RoHS: Compliant
|
0 |
VO618A-3 D# V99:2348_09170769 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP RoHS: Compliant
|
0 |
SFH618A-3XSMT/R D# V72:2272_22605406 |
Isocom Components |
DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD T/R RoHS: Compliant
|
0 |
SFH618A-3SM D# V99:2348_22608730 |
Isocom Components |
DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD RoHS: Compliant
|
0 |
SFH618A-3X016 D# V36:1790_09172045 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP RoHS: Compliant
|
0 |
SFH618A-3X017 D# V36:1790_09172049 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD RoHS: Compliant
|
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X001 D# SFH618A-3X001 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP - Tape and Reel (Alt: SFH618A-3X001) |
0 |
SFH618A-3X006 D# SFH618A-3X006 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP - Tape and Reel (Alt: SFH618A-3X006) |
0 |
VO618A-3 D# VO618A-3 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP - Tape and Reel (Alt: VO618A-3) |
0 |
SFH618A-3 D# 58K2209 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP - Bulk (Alt: 58K2209) |
0 |
SFH618A-3X017 D# SFH618A-3X017 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD - Tape and Reel (Alt: SFH618A-3X017) |
0 |
SFH618A-3X016 D# SFH618A-3X016 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP - Tape and Reel (Alt: SFH618A-3X016) |
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X016 D# SFH618A-3X016 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP (Alt: SFH618A-3X016) |
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X006 D# SFH618A-3X006 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP (Alt: SFH618A-3X006) |
0 |
VO618A-3 D# VO618A-3 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP (Alt: VO618A-3) |
0 |
SFH618A-3X001 D# SFH618A-3X001 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP (Alt: SFH618A-3X001) |
0 |
SFH618A-3X016 D# SFH618A-3X016 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP (Alt: SFH618A-3X016) |
0 |
SFH618A-3X017 D# SFH618A-3X017 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD (Alt: SFH618A-3X017) |
0 |
SFH618A-3 D# SFH618A-3 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP (Alt: SFH618A-3) |
0 |
SFH618A-3X017T D# SFH618A-3X017T |
Vishay Intertechnologies |
Optocoupler (Alt: SFH618A-3X017T) |
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3 |
Siemens | 500 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3 D# 68S3542 |
Vishay Aztronic |
Optokoppler SFH618A-3 |
1485 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3 |
Isocom Components |
Optocoupler, THT, Channels:1, Out: transistor, Uinsul:5 |
335 |
SFH618A-3X006 |
Vishay Semiconductors |
DIP-4 CPLR 100-200% CTR -E3 - Tape and Reel |
0 |
VO618A-3 |
Vishay Intertechnologies |
OPTOCOUPLER, TRANS., 100-200%, 1MA |
1482 |
SFH618A-3X016 |
Vishay Intertechnologies |
Optocoupler, THT, Channels:1, Out: transistor, Uinsul:5 |
100 |
SFH618A-3X017 |
Vishay Semiconductors |
- Tape and Reel |
0 |
SFH618A-3X001 |
Vishay Semiconductors |
- Rail/Tube |
300 |
Nº de pieza | Fabricantes | Descripción | En existencias |
VO618A-3 |
Vishay Intertechnologies |
TransistorOptocouplers DC 1 5300Vrms DIP-4 Optocouplers RoHS |
14 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A3X017 |
Vishay Intertechnologies |
Transistor Output Optocoupler, 1-Element, 5300V Isolation RoHS: Compliant
|
0 |
SFH618A3 |
Vishay Intertechnologies |
Transistor Output Optocoupler, 1-Element, 5300V Isolation RoHS: Compliant
|
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
VO618A-3 D# VO618A-3-ND |
Vishay Semiconductors |
OPTOISOLATOR 5.3KV TRANS 4-DIP |
107 |
SFH618A-3X016 D# SFH618A-3X016-ND |
Vishay Semiconductors |
OPTOISOLATOR 5.3KV TRANS 4DIP |
2230 |
SFH618A-3 D# SFH618A-3-ND |
Vishay Semiconductors |
OPTOISOLATOR 5.3KV TRANS 4-DIP |
1480 |
SFH618A-3X017 D# SFH618A-3X017-ND |
Vishay Semiconductors |
OPTOISOLATOR 5.3KV TRANS 4SMD |
29 |
SFH618A-3X001 D# SFH618A-3X001-ND |
Vishay Semiconductors |
OPTOISOLATOR 5.3KV TRANS 4DIP |
3954 |
SFH618A-3X017T D# SFH618A-3X017TCT-ND |
Vishay Semiconductors |
OPTOISOLATOR 5.3KV TRANS 4SMD |
2816 |
SFH618A-3X006 D# SFH618A-3X006-ND |
Vishay Semiconductors |
OPTOISOLATOR 5.3KV TRANS 4DIP |
610 |
SFH618A-3X D# SFH618A-3X-ND |
Isocom Components |
OPTOISOLATOR 5.3KV TRANS 4DIP |
7272 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X001 |
Infineon Technologies AG |
In stock shipping within 2days |
3530 |
SFH618A-3 |
SIEMENS |
In stock shipping within 2days |
140 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3 D# 1020374 |
Vishay Intertechnologies |
OPTOCOUPLER, TRANSISTOR, 5300VRMS RoHS: Compliant
Min Qty: 1
Container: Each
|
4484 |
VO618A-3 D# 2251560 |
Vishay Intertechnologies |
OPTOCOUPLER, TRANS., 100-200%, 1MA RoHS: Compliant
Min Qty: 5
Container: Each
|
4563 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3XSMTR |
Isocom Components |
DIP-4 Surface Mount 5300 Vrms Phototransistor Optically Coupled Isolator RoHS: Compliant
pbFree: Yes
|
0 |
SFH618A-3X016 |
Vishay Intertechnologies |
RoHS: Compliant
pbFree: Yes
|
0 |
SFH618A-3 |
Vishay Intertechnologies |
Single Channel 55 V 5300 Vrms Through Hole Phototransistor Optocoupler - DIP-4 RoHS: Compliant
pbFree: Yes
|
0 |
SFH618A-3X017 |
Vishay Intertechnologies |
Surface Mount 4 Optocoupler 100-200% Ctr VDE RoHS: Compliant
pbFree: Yes
|
0 |
SFH618A-3X001 |
Vishay Intertechnologies |
RoHS: Compliant
pbFree: Yes
|
0 |
SFH618A-3X017T |
Vishay Intertechnologies |
Transistor Output Optocoupler 4 Pin SMT 1 Channel RoHS: Compliant
pbFree: Yes
|
0 |
SFH618A-3X006 |
Vishay Intertechnologies |
RoHS: Compliant
pbFree: Yes
|
0 |
VO618A-3 |
Vishay Intertechnologies |
VO618A Series Single Channel 5300 Vrms 100 % Phototransistor Optocoupler - DIP-4 RoHS: Compliant
pbFree: Yes
|
86 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A3 |
Vishay Intertechnologies | 2759 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3 |
Siemens |
in stock - can ship the same day |
30 |
SFH618A-3X001 |
Vishay Intertechnologies |
in stock - can ship the same day |
93 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3 |
Vishay Intertechnologies |
OEM/CM Immediate delivery |
1000 |
SFH618A-3T |
Vishay Intertechnologies |
OEM/CM Immediate delivery |
1618 |
Nº de pieza | Fabricantes | Descripción | En existencias |
VO618A-3 D# 78-VO618A-3 |
Vishay Intertechnologies |
Transistor Output Optocouplers RECOMMENDED ALT 782-SFH618A-3 RoHS: Compliant
|
2879 |
SFH618A-3X001 D# 782-SFH618A-3X001 |
Vishay Intertechnologies |
Transistor Output Optocouplers Phototransistor Out Single CTR>100-200% RoHS: Compliant
|
3725 |
SFH618A-3 D# 782-SFH618A-3 |
Vishay Intertechnologies |
Transistor Output Optocouplers RECOMMENDED ALT 78-VO618A-3 RoHS: Compliant
|
4907 |
SFH618A-3X006 D# 782-SFH618A-3X006 |
Vishay Intertechnologies |
Transistor Output Optocouplers Phototransistor Out Single CTR>100-200% RoHS: Compliant
|
1541 |
SFH618A-3X016 D# 782-SFH618A-3X016 |
Vishay Intertechnologies |
Transistor Output Optocouplers Phototransistor Out Single CTR>100-200% RoHS: Compliant
|
3999 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3SM |
Isocom Components |
Transistor Output Optocoupler,1-Element,5300VIsolation RoHS: Compliant
|
0 |
SFH618A-3SMT&R |
Isocom Components |
Transistor Output Optocoupler,1-Element,5300VIsolation RoHS: Compliant
|
0 |
SFH618A-3 |
Isocom Components |
Transistor Output Optocoupler,1-Element,5300VIsolation RoHS: Compliant
|
0 |
SFH618A-3XSMT&R |
Isocom Components |
Transistor Output Optocoupler,1-Element,5300VIsolation RoHS: Compliant
|
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3SMT&R D# ISOC00000001454 |
Isocom Components |
Transistor Output Optocoupler,1-Element,5300VIsolation |
0 |
SFH618A-3X001 D# XSKDRABV0041510 |
Vishay Intertechnologies | 800 | |
SFH618A-3 D# ISOC00000000366 |
Isocom Components |
Transistor Output Optocoupler,1-Element,5300VIsolation |
0 |
SFH618A-3XSMT&R D# ISOC00000000367 |
Isocom Components |
Transistor Output Optocoupler,1-Element,5300VIsolation |
0 |
SFH618A-3SM D# ISOC00000001452 |
Isocom Components |
Transistor Output Optocoupler,1-Element,5300VIsolation |
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X017T D# 59AC7275 |
Vishay Intertechnologies |
SMD-4 CPLR 100-200% CTR VDE-E3 RoHS: Not Compliant
Min Qty: 1000
Container: Bulk
|
0 |
VO618A-3 D# 48W7186 |
Vishay Intertechnologies |
OPTOCOUPLER, TRANSISTOR, 5.3KV, DIP, No. of Channels:1 Channel, Optocoupler Case Style:DIP, No. of Pins:4Pins, Forward Current If Max:60mA, Isolation Voltage:5.3kV, CTR Min:100%, Collector Emitter Voltage V(br)ceo:80V RoHS Compliant: Yes RoHS: Compliant
Min Qty: 5
Container: Bulk
|
4508 |
SFH618A-3 D# 58K2209 |
Vishay Intertechnologies |
OPTOCOUPLER, TRANSISTOR, 5300VRMS, No. of Channels:1 Channel, Optocoupler Case Style:DIP, No. of Pins:4Pins, Forward Current If Max:60mA, Isolation Voltage:5.3kV, CTR Min:100%, Collector Emitter Voltage V(br)ceo:55V, Product Range:- RoHS Compliant: Yes RoHS: Compliant
Min Qty: 1
Container: Bulk
|
4484 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X001 D# NS-SFH618A-3X001 |
Vishay Semiconductors |
OEM/CM ONLY |
4496 |
SFH618A-3G D# NS-SFH618A-3G |
ISOCOM Components |
OEM/CM ONLY |
1363 |
SFH618A3 D# NS-SFH618A3 |
Infineon Technologies AG |
OEM/CM ONLY |
2537 |
SFH618A-3X006 D# NS-SFH618A-3X006 |
Vishay Semiconductors |
OEM/CM ONLY |
8548 |
VO618A-3 D# NS-VO618A-3 |
Vishay Semiconductors |
OEM/CM ONLY |
2507 |
SFH618A-3X016 D# NS-SFH618A-3X016 |
Vishay Semiconductors |
OEM/CM ONLY |
7952 |
SFH618A-3 D# NS-SFH618A-3 |
Vishay Semiconductors |
OEM/CM ONLY |
3938 |
SFH618A-3X017 D# NS-SFH618A-3X017 |
Vishay Semiconductors |
OEM/CM ONLY |
1955 |
SFH618A-3X007 D# NS-SFH618A-3X007 |
VARIOUS |
OEM/CM ONLY |
8699 |
SFH618A-3SM D# NS-SFH618A-3SM |
ISOCOM Components |
OEM/CM ONLY |
4016 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3 |
Siemens |
Optocoupler, DC Input, Transistor Output, 1 Channel, 5.3KV Isolation, DIP |
27 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3XSMT&R D# 1611078 |
Isocom Components |
Isocom, SFH618A-3XSMT&R DC Input NPN Phototransistor Output Optocoupler, Surface Mount, 4-Pin SMD, RL Min Qty: 1000
Container: Reel
|
2320 |
VO618A-3 D# 7730171 |
Vishay Intertechnologies |
Vishay, VO618A-3 DC Input Phototransistor Output Optocoupler, Through Hole, 4-Pin DIP, BG Min Qty: 10
Container: Bag
|
0 |
SFH618A-3 D# 1807243 |
Vishay Intertechnologies |
DIP-4 CPLR 100-200% CTR -e3, TU Min Qty: 100
Container: Tube
|
3700 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A3XSMTR |
Isocom Components |
OEM/CM ONLY |
3095 |
SFH618A3SM |
ISOCOM Components |
OEM/CM ONLY |
2095 |
SFH618A3XSM |
Isocom Components |
OEM/CM ONLY |
1066 |
SFH618A3X006 |
Vishay Siliconix |
OEM/CM ONLY |
3996 |
SFH618A3X016 |
Vishay Semiconductors |
OEM/CM ONLY |
3716 |
SFH618A3X017 |
Vishay Semiconductors |
OEM/CM ONLY |
76516 |
SFH618A3X |
Isocom Components |
OEM/CM ONLY |
3516 |
SFH618A3 |
Infineon Technologies AG |
OEM/CM ONLY |
63266 |
SFH618A3IS |
N/A |
OEM/CM ONLY |
946 |
SFH618A3113819 |
Major League Electronics |
OEM/CM ONLY |
52 |
SFH618A3SMIS |
N/A |
OEM/CM ONLY |
1016 |
SFH618A3X001 |
Vishay Semiconductors |
OEM/CM ONLY |
216 |
SFH618A3SMT/R |
Isocom Components |
OEM/CM ONLY |
2095 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3 |
Vishay Intertechnologies |
IN stock Immediate delivery |
995 |
SFH618A-3T |
Vishay Intertechnologies |
IN stock Immediate delivery |
1633 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X016 |
Vishay Intertechnologies |
Transistor Output Optocouplers Phototransistor Out Single CTR>100-200% pbFree: Pb-Free
|
0 |
VO618A-3 |
Vishay Intertechnologies |
Transistor Output Optocouplers RECOMMENDED ALT 782-SFH618A-3 pbFree: Pb-Free
|
0 |
SFH618A-3 |
Vishay Intertechnologies |
Transistor Output Optocouplers RECOMMENDED ALT 78-VO618A-3 pbFree: Pb-Free
|
0 |
SFH618A-3X017 |
Vishay Intertechnologies |
Transistor Output Optocouplers Phototransistor Out Single CTR>100-200% pbFree: Pb-Free
|
0 |
SFH618A-3X001 |
Vishay Intertechnologies |
Transistor Output Optocouplers Phototransistor Out Single CTR>100-200% pbFree: Pb-Free
|
0 |
SFH618A-3X006 |
Vishay Intertechnologies |
Transistor Output Optocouplers Phototransistor Out Single CTR>100-200% pbFree: Pb-Free
|
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X007T |
Vishay Huntington |
shipping today |
16 |
SFH618A-3X001 |
Vishay Huntington |
shipping today |
321 |
SFH618A-3 |
Vishay Huntington |
shipping today |
2996 |
SFH618A-3X007 |
Vishay Huntington |
shipping today |
796 |
SFH618A-3X017T |
Vishay Huntington |
shipping today |
16 |
SFH618A-3X006 |
Vishay Huntington |
shipping today |
22 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3G D# 53478629 |
Isocom Components |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP RoHS: Compliant
|
0 |
SFH618A-3XSM D# 53478621 |
Isocom Components |
Phototransistor Optically Coupled Isolator RoHS: Compliant
|
0 |
SFH618A-3SMT&R D# 53478595 |
Isocom Components |
DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD T/R RoHS: Compliant
|
0 |
VO618A-3 D# 53410436 |
Vishay Intertechnologies |
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP RoHS: Compliant
|
0 |
SFH618A-3 D# 53478536 |
Isocom Components |
DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP RoHS: Compliant
|
0 |
SFH618A-3XG D# 53478620 |
Isocom Components |
Phototransistor Optically Coupled Isolator RoHS: Compliant
|
0 |
SFH618A-3XSMT/R D# 53478656 |
Isocom Components |
DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD T/R RoHS: Compliant
|
0 |
SFH618A-3X D# 53478568 |
Isocom Components |
Phototransistor Optically Coupled Isolator RoHS: Compliant
|
0 |
SFH618A-3SM D# 53478565 |
Isocom Components |
DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD RoHS: Compliant
|
0 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X006 |
Vishay Semiconductors |
RFQ |
11361 |
SFH618A-3X001 |
Vishay Semiconductors |
RFQ |
10192 |
SFH618A-3X016 |
Vishay Semiconductors |
RFQ |
2102 |
SFH618A-3X007 |
Vishay Intertechnologies |
RFQ |
6441 |
Nº de pieza | Fabricantes | Descripción | En existencias |
SFH618A-3X001 |
Vishay Huntington |
OPTOISOLATOR 5.3KV TRANS 4DIP |
3800 |
SFH618A-3 |
Vishay Huntington |
Phototransistor, 5.3 kV TRIOS Low Current Input Optocoupler |
3400 |
Nº de pieza | Fabricantes | Descripción | En existencias |
VO618A-3 D# 2251560 |
Vishay Intertechnologies |
OPTOCOUPLER, TRANS., 100-200%, 1MA RoHS: Compliant
Min Qty: 1
Container: Each
|
4508 |
SFH618A-3 D# 1020374 |
Vishay Intertechnologies |
OPTOCOUPLER, TRANSISTOR, 5300VRMS RoHS: Compliant
Min Qty: 1
Container: Each
|
4484 |
El compromiso de Heisener con la calidad ha dado forma a nuestros procesos de abastecimiento, prueba, envío y cada paso intermedio. Esta base subyace en cada componente que vendemos.
¿Tienes alguna pregunta sobre SFH618A-3?
+86-755-83210559 ext. 803
Escanee para ver esta página
IC OFFLINE CTRLR SMPS OTP 8DIP
CAP SUPER 470MF 5.5V 3-SMD
IC MCU 8BIT 32KB FLASH 28SOIC
IC REG LINEAR NEG ADJ 1.5A TO3
IC REG LIN 2.5V 150MA TSOT23-5
IC UART FIFO 16B DUAL 44PLCC
RELAY SSR 240VAC 2A TRIAC 4-SIP
IC OPAMP VFB 160MHZ RRO 14SOIC
TRANS PNP 300V 0.5A SOT-223
IC FLASH 256MBIT 100NS 64EASYBGA