Name: 2N2907AUA
Brand: TT Electronics/Optek Technology
SKU: 2N2907AUA_284
Availability: InStock
Rating: 5 (84 reviews)

2N2907AUA

Solo por referencia

Nº de pieza	2N2907AUA
Fabricantes	TT Electronics/Optek Technology
Descripción	TRANS PNP 60V 0.6A SMD
Hoja de datos	2N2907AUA Hoja de datos
Paquete	4-CLCC
ECAD
En existencias	2.912 piece(s)
Precio unitario	Request a Quote
Plazo de ejecución	Para ser confirmado
Tiempo estimado de entrega	nov 4 - nov 9 (Elija envío expedito)
Pedir presupuesto

Métodos de pago
Servicios de entrega

Estamos ofreciendo 2N2907AUA por precios competitivos en el mercado mundial, por favor nos envíe una solicitud de cuotas para la fijación de precios. ¡Gracias!
Para procesar su RFQ, por favor agregue 2N2907AUA con la cantidad en la BOM. Heisener.com no requiere ningún tipo de registro para solicitar una cotización de 2N2907AUA.

Especificaciones 2N2907AUA

Fabricantes	TT Electronics/Optek Technology
Categoría	Productos semiconductores discretos - Transistores - Bipolar (BJT) - Simple
Paquete	4-CLCC
ECAD
Serie	-
Tipo de transistor	PNP
Current - Collector (Ic) (Max)	600mA
Voltaje: ruptura del emisor del colector (máximo)	60V
Saturación de Vce (Máx) @ Ib, Ic	1.6V @ 50mA, 500mA
Corriente - corte de colector (máximo)	50nA
Ganancia de corriente CC (hFE) (Min) @ Ic, Vce	100 @ 1mA, 10V
Potencia - Max	400mW
Frecuencia - Transición	-
Temperatura de funcionamiento	-65°C ~ 200°C (TJ)
Tipo de montaje	Surface Mount
Paquete / caja	4-CLCC
Paquete de dispositivo del proveedor	Ceramic SMD

ficha técnica 2N2907AUA

2N2907AUA Packaging

2N2907AUA FAQ

1. How to order 2N2907AUA on Heisener?

Currently, Heisener only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.
2. How does Heisener guarantee that 2N2907AUA is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the 2N2907AUA. All suppliers must pass our qualification reviews before they can publish their products including 2N2907AUA on Heisener; we pay more attention to the channels and quality of 2N2907AUA products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
3. Are the 2N2907AUA price and inventory displayed accurate?

The price and inventory of 2N2907AUA fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.
4. What forms of payment are accepted?

Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.

Warm Tips: Some orders in certain payment forms may require handling fee.
5. How is the shipping arranged?

Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.

Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.

Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.
6. What is the process for return or replacement of 2N2907AUA?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the 2N2907AUA we delivered, we will accept the replacement or return of the 2N2907AUA only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of 2N2907AUA.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations
7.How to contact us to get technical supports, such as 2N2907AUA pin diagram, 2N2907AUA datasheet?

If you need any after-sales service, please do not hesitate to contact us.

2N2907AUA Productos Relacionados

CDV30FK821GO3F	Cornell Dubilier Electronics (CDE), MICA, -, -	Ver
VJ1808A270KBEAT4X	Vishay Vitramon, CAP CER 27PF 500V NP0 1808, 1808 (4520 Metric), -	Ver
0805J6300120JCT	Knowles Syfer, CAP CER 12PF 630V C0G/NP0 0805, 0805 (2012 Metric), -	Ver
C317C471J3G5TA	KEMET, CAP CER 470PF 25V C0G RADIAL, Radial, -	Ver
MMSZ5232B-TP	Micro Commercial Co, DIODE ZENER 5.6V 500MW SOD123, SOD-123, -	Ver
MAX3461CSD+	Maxim Integrated, IC TXRX RS485/RS422 14-SOIC, 14-SOIC (0.154", 3.90mm Width), -	Ver
PIC16LF1512-E/SP	Microchip Technology, IC MCU 8BIT 3.5KB FLASH 28SDIP, 28-DIP (0.300", 7.62mm), -	Ver
NB6L239MNR2	ON Semiconductor, IC CLOCK DIVIDER HS 16-QFN, 16-VFQFN Exposed Pad, -	Ver
9903600009	Dialight, LED ACCESSORY GASKET, -, -	Ver
CWR-180-09-0021	CW Industries, CONN D-SUB RCPT 9POS STR IDC, -, -	Ver
97-3107B22-20PW-417	Amphenol Industrial Operations, AB 9C 9#16 PIN PLUG, -, -	Ver
VI-B4M-MU-S	Vicor Corporation, CONVERTER MOD DC/DC 10V 200W, Full Brick, -	Ver

2N2907AUA Garantías

Garantias de servicio

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.

Garantias de calidad

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.

Cadenas de suministro globales: recursos para distribuidores confiables y autorizados

Nº de pieza	Fabricantes	Descripción	En existencias
2N2907AUATXV D# 70048863	TT Electronics OPTEK Technology	4 PIN, SMT PNP GENERAL PURPOSE TRANSISTOR RoHS: Compliant	0
2N2907AUA D# 70048861	TT Electronics OPTEK Technology	4 Pin, Smt Pnp General Purpose Transistor RoHS: Compliant	0
2N2907AUATX D# 70048862	TT Electronics OPTEK Technology	4 PIN, SMT PNP GENERAL PURPOSE TRANSISTOR RoHS: Compliant	0

Nº de pieza	Fabricantes	Descripción	En existencias
2N2907AUA D# V37:1799_07171809	TT Electronics OPTEK Technology	Trans GP BJT PNP 60V 0.6A 500mW 4-Pin CSMD Waffle RoHS: Compliant	0
JANS2N2907AUA D# VN6:3635_17334759	Microsemi Corporation	Trans GP BJT PNP 60V 0.6A 500mW 4-Pin UA Tray RoHS: Compliant	0
JANTX2N2907AUA D# V37:1799_07076953	Semicoa Semiconductors	Trans GP BJT PNP 60V 0.6A 4-Pin UA RoHS: Not Compliant	0
JANTXV2N2907AUA D# V37:1799_07432257	Microchip Technology Inc	Trans GP BJT PNP 60V 0.6A 500mW 4-Pin UA Waffle RoHS: Not Compliant	0
JANTX2N2907AUA/TR D# V37:1799_18762526	Microchip Technology Inc	Trans GP BJT PNP 60V 0.6A 500mW 4-Pin UA T/R RoHS: Not Compliant	0

Nº de pieza	Fabricantes	Descripción	En existencias
GROUPADATA/2N2907AUAJANTX D# GROUPADATA/JANTX2N2907AUA	Semicoa Semiconductors	Small Signal Silicon Transistor PNP 60V 600mA 0.5W 4-Pin Surface Mount - Virtual or Non-Physical Inventory (Software & Literature) (Alt: GROUPADATA/JANTX2N2907AUA) RoHS: Not Compliant	0
JAN2N2907AUA D# JAN2N2907AUA	Microchip Technology Inc	Trans GP BJT PNP 60V 600mA 4-Pin SMD Waffle Pack - Waffle Pack (Alt: JAN2N2907AUA) RoHS: Compliant	0
JANSP2N2907AUA/TR D# JANSP2N2907AUA/TR	Microchip Technology Inc	Trans GP BJT PNP 60V 600mA 4-Pin SMD T/R - Tape and Reel (Alt: JANSP2N2907AUA/TR) RoHS: Not Compliant	0
JANS2N2907AUA D# JANS2N2907AUA	VPT Components	JANS2N2907AUA - Bulk (Alt: JANS2N2907AUA)	0
2N2907AUA D# 2N2907AUA/TR	Microchip Technology Inc	Trans GP BJT PNP 60V 600mA 4-Pin SMD - Tape and Reel (Alt: 2N2907AUA/TR) RoHS: Not Compliant	0
JANTX2N2907AUA D# JANTX2N2907AUA	Semicoa Semiconductors	Switching - Waffle Pack (Alt: JANTX2N2907AUA) RoHS: Not Compliant	0
2N2907AUAJVJANTXV D# JANTXV2N2907AUA	Semicoa Semiconductors	Switching - Waffle Pack (Alt: JANTXV2N2907AUA)	0
JANSD2N2907AUA/TR D# JANSD2N2907AUA/TR	Microchip Technology Inc	Trans GP BJT PNP 60V 600mA 4-Pin SMD T/R - Tape and Reel (Alt: JANSD2N2907AUA/TR) RoHS: Not Compliant	0
2N2907AUAJAN/TR D# JAN2N2907AUA/TR	Microchip Technology Inc	Transistor GP BJT PNP 60V 600mA 4-Pin SMD T/R - Tape and Reel (Alt: JAN2N2907AUA/TR) RoHS: Compliant	0
2N2907AUAJANTX/TR/HSD FEE D# 2N2907AUAJANTX/TR/HSD FEE	Microchip Technology Inc	Transistor GP BJT PNP 60V 600mA 4-Pin SMD T/R - Virtual or Non-Physical Inventory (Software & Literature) (Alt: 2N2907AUAJANTX/TR/HSD FEE) RoHS: Not Compliant	0
JANSL2N2907AUA/TR D# JANSL2N2907AUA/TR	Microchip Technology Inc	Trans GP BJT PNP 60V 600mA 4-Pin SMD T/R - Tape and Reel (Alt: JANSL2N2907AUA/TR) RoHS: Not Compliant	0
JANTXV2N2907AUA D# JANTXV2N2907AUA	Semicoa Semiconductors	SWITCHING - Bulk (Alt: JANTXV2N2907AUA) RoHS: Not Compliant	0
JANSR2N2907AUA D# JANSR2N2907AUA	Semicoa Semiconductors	Switching100 Krad(Si) - Waffle Pack (Alt: JANSR2N2907AUA) RoHS: Not Compliant	0
2N2907AUAJANTXV/TR D# JANTXV2N2907AUA/TR	Microchip Technology Inc	Transistor GP BJT PNP 60V 600mA 4-Pin SMD T/R - Tape and Reel (Alt: JANTXV2N2907AUA/TR) RoHS: Not Compliant	0

Nº de pieza	Fabricantes	Descripción	En existencias
JANTXV2N2907AUA	Microsemi Corporation	Authorized with Certs	385
JANTX2N2907AUA	Aeroflex / Metelics	SMALL SIGNAL TRANSISTOR - Bulk	0
2N2907AUA	TT Electronics OPTEK Technology	Trans GP BJT PNP 60V 0.6A 4-Pin CSMD	25
JAN2N2907AUA	Microsemi Corporation	TRANS PNP 60V 0.6A	0

Nº de pieza	Fabricantes	Descripción	En existencias
JANTX2N2907AUA D# 1086-2689-ND	Microchip Technology Inc	TRANS PNP 60V 0.6A	0
JANTX2N2907AUA/TR D# JANTX2N2907AUA/TR-ND	Microchip Technology Inc	SMALL-SIGNAL BJT	0
JAN2N2907AUA D# 1086-2338-ND	Microchip Technology Inc	TRANS PNP 60V 0.6A	0
2N2907AUA D# 2N2907AUA-ND	TT Electronics OPTEK Technology	TRANS PNP 60V 0.6A SMD	0
JANTXV2N2907AUA D# 1086-3066-ND	Microchip Technology Inc	TRANS PNP 60V 0.6A 4UA	0

Nº de pieza	Fabricantes	Descripción	En existencias
2N2907AUATXV	TT Electronics OPTEK Technology	In stock shipping within 2days	10260
JANTXV2N2907AUA	Microsemi Corporation	In stock shipping within 2days	320
JANSR2N2907AUA	Microsemi Corporation	In stock shipping within 2days	370
JANTX2N2907AUA	Microsemi Corporation	In stock shipping within 2days	1210
2N2907AUATX	TT Electronics OPTEK Technology	In stock shipping within 2days	10260
JANS2N2907AUA	Microsemi Corporation	In stock shipping within 2days	660

Nº de pieza	Fabricantes	Descripción	En existencias
JANTX2N2907AUA	Microchip Technology Inc	JANTX Series 500 mW 60 V 600mA Surface Mount PNP Small Signal Silicon Transistor RoHS: Compliant pbFree: Yes	201
2N2907AUA	Microchip Technology Inc	TRANS PNP 60V 0.6A SMD RoHS: Compliant pbFree: Yes	0
JANTX2N2907AUA/TR	Microchip Technology Inc	JANTX Series 500 mW 60 V 600mA Surface Mount PNP Small Signal Silicon Transistor RoHS: Compliant pbFree: Yes	73

Nº de pieza	Fabricantes	Descripción	En existencias
JANTX22N2907AUA	TT Electronics OPTEK Technology	OEM/CM QUOTES ONLY \| NO BROKERS	3
2N2907AUAJV	Semicoa	OEM/CM QUOTES ONLY \| NO BROKERS	1349
JANTXV2N2907AUA	SEMICOA	OEM/CM QUOTES ONLY \| NO BROKERS	1929
JANTX2N2907AUATR	Microsemi Corporation	OEM/CM QUOTES ONLY \| NO BROKERS	85
JS2N2907AUA	Microwave Semiconductor	OEM/CM QUOTES ONLY \| NO BROKERS	184
JANSR2N2907AUA		OEM/CM QUOTES ONLY \| NO BROKERS	3874
JX2N2907AUAJANTXV2N2907AUA	TT Electronics OPTEK Technology	OEM/CM QUOTES ONLY \| NO BROKERS	29
2N2907AUAJX	Semicoa	OEM/CM QUOTES ONLY \| NO BROKERS	589
JXV2N2907AUA	TT Electronics OPTEK Technology	OEM/CM QUOTES ONLY \| NO BROKERS	1
2N2907AUA	Hybritek	OEM/CM QUOTES ONLY \| NO BROKERS	218
JX2N2907AUA	TT Electronics OPTEK Technology	OEM/CM QUOTES ONLY \| NO BROKERS	63
JANTX2N2907AUA		OEM/CM QUOTES ONLY \| NO BROKERS	3874
JANS2N2907AUA		OEM/CM QUOTES ONLY \| NO BROKERS	4199
JAN2N2907AUA	MICROPAC INDUSTRIES	OEM/CM QUOTES ONLY \| NO BROKERS	1162
2N2907AUAJANTX	TT Electronics OPTEK Technology	OEM/CM QUOTES ONLY \| NO BROKERS	21
JSNTX2N2907AUA	MICROSEMI CORPORATION	OEM/CM QUOTES ONLY \| NO BROKERS	2

Nº de pieza

Fabricantes

Descripción

En existencias

2N2907AUA

TT Electronics OPTEK Technology

RoHS: Not Compliant

Nº de pieza

Fabricantes

Descripción

En existencias

2N2907AUA/TR

D# 2N2907AUA/TR

Microchip Technology Inc

Small-Signal BJT _ UA

RoHS: Compliant

pbFree: Yes

2N2907AUA

D# 2N2907AUA

Microchip Technology Inc

Small-Signal BJT _ UA

RoHS: Compliant

pbFree: Yes

Nº de pieza

Fabricantes

Descripción

En existencias

2N2907AUA

D# 828-2N2907AUA

TT Electronics plc

Bipolar Transistors - BJT PNP G.P. Transistor 4 Pin

RoHS: Not Compliant

Nº de pieza	Fabricantes	Descripción	En existencias
JANSM2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANSR2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANSP2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANTXV2N2907AUA	Microchip Technology Inc	BJTs RoHS: Compliant	0
JAN2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANSR2N2907AUA	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANTX2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANSD2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
2N2907AUA	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANTX2N2907AUA	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANS2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANSL2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANTXV2N2907AUA/TR	Microchip Technology Inc	BJTs RoHS: Compliant	0
JANS2N2907AUA	Microchip Technology Inc	BJTs RoHS: Compliant	0
JAN2N2907AUA	Microchip Technology Inc	BJTs RoHS: Compliant	0

Nº de pieza	Fabricantes	Descripción	En existencias
JANSR2N2907AUA/TR D# MCHP00000063449	Microchip Technology Inc	BJTs	0
JANTXV2N2907AUA D# MCHP00000073991	Microchip Technology Inc	BJTs	0
JANSP2N2907AUA/TR D# MCHP00000063395	Microchip Technology Inc	BJTs	0
JANSR2N2907AUA D# MCHP00000063448	Microchip Technology Inc	BJTs	0
JAN2N2907AUA/TR D# MCHP00000060325	Microchip Technology Inc	BJTs	0
JANTX2N2907AUA/TR D# MCHP00000068636	Microchip Technology Inc	BJTs	0
JANTX2N2907AUA D# MCHP00000068635	Microchip Technology Inc	BJTs	0
JANSD2N2907AUA/TR D# MCHP00000063250	Microchip Technology Inc	BJTs	0
2N2907AUA D# MCHP00000046930	Microchip Technology Inc	BJTs	0
JANS2N2907AUA D# MCHP00000063022	Microchip Technology Inc	BJTs	0
JANS2N2907AUA/TR D# MCHP00000063023	Microchip Technology Inc	BJTs	0
JANSL2N2907AUA/TR D# MCHP00000063330	Microchip Technology Inc	BJTs	0
JANTXV2N2907AUA/TR D# MCHP00000073992	Microchip Technology Inc	BJTs	0
JAN2N2907AUA D# MCHP00000060324	Microchip Technology Inc	BJTs	0
JANSM2N2907AUA/TR D# MCHP00000063365	Microchip Technology Inc	BJTs	0

Nº de pieza

Fabricantes

Descripción

En existencias

2N2907AUA

D# 01C3700

TT Electronics OPTEK Technology

TRANSISTOR,BJT,PNP,60V V(BR)CEO,600MA I(C),SMT ROHS COMPLIANT: YES

RoHS: Compliant

Min Qty: 120

Container: Bulk

Nº de pieza	Fabricantes	Descripción	En existencias
JANS2N2907AUA D# NS-JANS2N2907AUA	Microsemi Corporation	OEM/CM ONLY	10356
JAN2N2907AUA D# NS-JAN2N2907AUA	Microsemi Corporation	OEM/CM ONLY	1132
2N2907AUA+JANTX D# NS-2N2907AUA+JANTX	Defense Logistics Agency	OEM/CM ONLY	3973
2N2907AUA+JAN D# NS-2N2907AUA+JAN	Defense Logistics Agency	OEM/CM ONLY	2462
JANTXV2N2907AUA D# NS-JANTXV2N2907AUA	Microsemi Corporation	OEM/CM ONLY	1181
2N2907AUA D# NS-2N2907AUA	TT Electronics OPTEK Technology	OEM/CM ONLY	4162
JANTX2N2907AUA D# NS-JANTX2N2907AUA	Microsemi Corporation	OEM/CM ONLY	1105
2N2907AUA+JANTXV D# NS-2N2907AUA+JANTXV	Defense Logistics Agency	OEM/CM ONLY	1961

Nº de pieza

Fabricantes

Descripción

En existencias

2N2907AUA

TT Electronics OPTEK Technology

RoHS: Not Compliant

Nº de pieza

Fabricantes

Descripción

En existencias

JANTXV2N2907AUA

TT Electronics OPTEK Technology

600 mA, 60 V, PNP, Si, SMALL SIGNAL TRANSISTOR

Nº de pieza

Fabricantes

Descripción

En existencias

2N2907AUA

D# 000000000003458334

TT Electronics OPTEK Technology

Trans GP BJT PNP 60V 0.6A 4-Pin CSMD

Nº de pieza	Fabricantes	Descripción	En existencias
2N2907AUAJV	Semicoa Semiconductors	OEM/CM ONLY	1210
2N2907AUAJSR	Semicoa Semiconductors	OEM/CM ONLY	499
JS2N2907AUA	Microwave Semiconductor	OEM/CM ONLY	175
2N2907AUAJX	Semicoa Semiconductors	OEM/CM ONLY	537
JX2N2907AUA	TT Electronics OPTEK Technology	OEM/CM ONLY	70
JANSR2N2907AUA	VPT Components	OEM/CM ONLY	77
JANTX2N2907AUA/TR	Microsemi Corporation	OEM/CM ONLY	168

Nº de pieza	Fabricantes	Descripción	En existencias
JANTXV2N2907AUA	VPT Components	Bipolar Transistors - BJT HI-REL MIL-PRF-19500/291 pbFree: Pb-Free	0
2N2907AUA	TT Electronics plc	Bipolar Transistors - BJT PNP G.P. Transistor 4 Pin pbFree: Pb-Free	0
JANSR2N2907AUA	VPT Components	Bipolar Transistors - BJT HI-REL MIL-PRF-19500/291 pbFree: Pb-Free	0
JANTX2N2907AUA	VPT Components	Bipolar Transistors - BJT HI-REL MIL-PRF-19500/291 pbFree: Pb-Free	0
JANS2N2907AUA	VPT Components	Bipolar Transistors - BJT HI-REL MIL-PRF-19500/291 pbFree: Pb-Free	0
JAN2N2907AUA	VPT Components	Bipolar Transistors - BJT HI-REL MIL-PRF-19500/291 pbFree: Pb-Free	0

Nº de pieza	Fabricantes	Descripción	En existencias
JANS2N2907AUA D# 51477889	Microsemi Corporation	Trans GP BJT PNP 60V 0.6A 500mW 4-Pin UA Tray RoHS: Compliant	0
2N2907AUA D# 27052327	TT Electronics OPTEK Technology	Trans GP BJT PNP 60V 0.6A 500mW 4-Pin CSMD Waffle RoHS: Compliant	0
JANTX2N2907AUA D# 36812648	Microchip Technology Inc	Trans GP BJT PNP 60V 0.6A 500mW 4-Pin UA Waffle RoHS: Not Compliant	0
JANTXV2N2907AUA D# 34010128	Microchip Technology Inc	Trans GP BJT PNP 60V 0.6A 500mW 4-Pin UA Waffle RoHS: Not Compliant	0

Quick Inquiry

2N2907AUA

Calidad certificada

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.

ISO9001:2015, ICAS, IAF, UKAS