Name: W3580
Brand: PulseLarsen Antennas
SKU: W3580
Availability: InStock
Rating: 5 (81 reviews)

W3580

Per Riferimento Soltanto

Numero di parte	W3580
Produttore	PulseLarsen Antennas
Descrizione	NFC FERRITE LOADED ANTENNA
Scheda dati
pacchetto	-
ECAD
A magazzino	6.348 piece(s)
Prezzo unitario	Request a Quote
Tempi di Consegna	Essere confermato
Tempo di consegna stimato	dic 6 - dic 11 (Scegli una spedizione rapida)
Richiedi Preventivo

Modalità di pagamento
Servizi di consegna

Stiamo offrendo W3580 per il prezzo competitivo sul mercato globale, vi preghiamo di inviarci una richiesta di quote per i prezzi. Grazie!
Per elaborare il tuo RFQ, si prega di aggiungere W3580 con quantità in distinta. Heisener.com non richiede alcuna registrazione, richiedere un preventivo di W3580.

Specifiche W3580

Produttore	PulseLarsen Antennas
Categoria	RF/IF e RFID - Antenne RFID
pacchetto	-
ECAD
Serie	-
Frequenza	13.56MHz
Caratteristiche	50mm x 35mm x 0.45mm
Dimensione / Dimensione	50.00mm L x 35.00mm W x 0.45mm H

W3580 Packaging

W3580 FAQ

1. How to order W3580 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 W3580 is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the W3580. All suppliers must pass our qualification reviews before they can publish their products including W3580 on Heisener; we pay more attention to the channels and quality of W3580 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
3. Are the W3580 price and inventory displayed accurate?

The price and inventory of W3580 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 W3580?

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 W3580 we delivered, we will accept the replacement or return of the W3580 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 W3580.

(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 W3580 pin diagram, W3580 datasheet?

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

W3580 Prodotti Correlati

0603Y0162P20CFT	Knowles Syfer, CAP CER 2.2PF 16V C0G/NP0 0603, 0603 (1608 Metric), -	Visualizza
0805Y0100471JCR	Knowles Syfer, CAP CER 470PF 10V C0G/NP0 0805, 0805 (2012 Metric), -	Visualizza
CY7C1268XV18-633BZXC	Cypress Semiconductor Corp, IC SRAM 36MBIT 633MHZ 165FBGA, 165-LBGA, -	Visualizza
UPD78F0756MC-CAB-AX	Renesas Electronics America, IC MCU 8BIT 16KB FLASH 30SSOP, 30-LSSOP (0.240", 6.10mm Width), -	Visualizza
R41-62-5.00A-35816-5	Sensata Technologies/Airpax, CIRCUIT BREAKER MAG-HYDR ROCKER, -, -	Visualizza
SF4B-H12G(V2)	Panasonic Industrial Automation Sales, SAFETY LITE CURTAIN HAND 244MM, -, -	Visualizza
41274	TE Connectivity AMP Connectors, CONN QC RCPT 14-18AWG 0.250, -, -	Visualizza
5430962	Phoenix Contact, TERM BLOCK HDR 18POS VERT 3.5MM, -, -	Visualizza
929705-09-34-I	3M, CONN HEADER 34POS STR .100" GOLD, -, -	Visualizza
DW-21-19-F-D-1045	Samtec Inc., .025" BOARD SPACERS, -, -	Visualizza
DW-08-19-F-S-990	Samtec Inc., .025" BOARD SPACERS, -, -	Visualizza
D38999/20FH53AA	TE Connectivity Deutsch Connectors, CONN RCPT HSNG MALE 53POS PNL MT, -, -	Visualizza

W3580 garanzie

Garanzie di servizio

Garantiamo la soddisfazione del cliente al 100%.

Il nostro team di vendita esperto e il team di supporto tecnico supportano i nostri servizi per soddisfare tutti i nostri clienti.

Garanzie di qualità

Forniamo una garanzia di 90 giorni.

Se gli articoli che hai ricevuto non fossero di qualità perfetta, saremmo responsabili per il rimborso o la sostituzione, ma gli articoli devono essere restituiti nelle loro condizioni originali.

Catene di fornitura globali - Risorse per distributori affidabili e autorizzati

Numero di parte

Produttore

Descrizione

Azione

W3580

D# V99:2348_07344514

Pulse Electronics Corporation

Antenna Flexible NFC Antenna 2-Pin

RoHS: Compliant

CRCW02014K53FNED

D# V36:1790_09194556

Vishay Intertechnologies

Res Thick Film 0201 4.53K Ohm 1% 0.05W(1/20W) ±200ppm/°C Pad SMD T/R

Numero di parte	Produttore	Descrizione	Azione
CRCW02014K53FNED D# CRCW02014K53FNED	Vishay Intertechnologies	Res Thick Film 0201 4.53K Ohm 1% 1/20W ±200ppm/°C Molded SMD SMD Paper T/R - Tape and Reel (Alt: CRCW02014K53FNED) RoHS: Compliant	0
W3580 D# W3580	Pulse Electronics Corporation	NFC FERRITE LOADED SEMI-FLEX ANTENNA - Bag (Alt: W3580) RoHS: Compliant	0
LS-821M2W---3580S D# LS-821M2W---3580S	Surge Components Inc	CAP ALUM 820UF 450V 20% 2000LHRS 35 X 80 - Bulk (Alt: LS-821M2W---3580S) RoHS: Compliant	0
2181195-1 D# 27W3580	TE Connectivity	Cable Assembly 0.6m 2 POS Power PL - Bulk (Alt: 27W3580)	0

Numero di parte	Produttore	Descrizione	Azione
W3580 D# W3580	Pulse Electronics Corporation	NFC FERRITE LOADED SEMI-FLEX ANTENNA (Alt: W3580)	0
CRCW02014K53FNED D# CRCW02014K53FNED	Vishay Intertechnologies	Res Thick Film 0201 4.53K Ohm 1% 1/20W ±200ppm/°C Molded SMD SMD Paper T/R (Alt: CRCW02014K53FNED)	0
W3580T0055 D# W3580T0055	Pulse Electronics Corporation	Antenna 13.56MHz NFC with 55m cable feed (Alt: W3580T0055)	0

Numero di parte	Produttore	Descrizione	Azione
EXB-V4V243JV	Panasonic Electronic Components	RES THKFLM ARY 0606 24K OHM 5% 200PPM/ C ISOL 4PIN CNCV SMD - Tape and Reel	0
ECW-H12303JV	Panasonic Electronic Components	CAP 0.03UF 1250VDC PLYP 5% 23 X 9.5 X 18MM RDL 20MM - Bulk	0
CRCW02014K53FNED	Vishay Intertechnologies	RES, THICK FILM, 4K53, 1%, 50MW, 0201	3800
ERJ-8ENF1152V	Panasonic Electronic Components	Res Thick Film 1206 11.5K Ohm 1% 0.25W(1/4W) 100ppm/C Molded SMD Punched Carrier T/R	65000
W3580	Panasonic Electronic Components	THICK FILM RESISTOR, 11K5, 250mW, 1%, 1206, Product Range:AEC-Q200 ERJ Series, Resistance:11.5kohm, Power Rating:250mW, Resistance Tolerance: 1%, Resistor Case Style:1206 [3216 Metric], Resistor Element Type:Thick Film, MSL:- , RoHS Compliant: Yes	49370

Numero di parte

Produttore

Descrizione

Azione

W3580

D# C1S612300102405

Pulse Electronics Corporation

Antenna Flexible NFC Antenna 2-Pin

RoHS: Compliant

pbFree: Yes

Min Qty: 1

150

Numero di parte	Produttore	Descrizione	Azione
2181195-1 D# A104293-ND	TE Connectivity	CABLE SPT-2 PLUG TO PIGTAIL	24
ERJ-8ENF1152V D# P11.5KFCT-ND	Panasonic Electronic Components	RES SMD 11.5K OHM 1% 1/4W 1206	6713
3-100141-0 D# A130913-ND	TE Connectivity	CONN HEADER 125POS 2MM PRESS-FIT	150
ECW-H12303JV D# ECW-H12303JV-ND	Panasonic Electronic Components	CAP FILM 0.03UF 5% 1.25KVDC RAD	0
TW-43-12-G-D-374-160 D# TW-43-12-G-D-374-160-ND	Samtec Inc	CONN BRD STACK 2.00 86POS	53
HX-SCE-1K-25.4-50-S1-4 D# HX-SCE-1K-25.4-50-S1-4-ND	TE Connectivity	LABEL HEAT SHRINKABL 1X1.97" YLW	0
MTMM-104-04-T-S-075 D# MTMM-104-04-T-S-075-ND	Samtec Inc	CONN HEADER VERT 4POS 2MM	1213
69-312B D# 2368-69-312B-ND	NTE Electronics Inc	LED STRIP BLUE 16.4 FEET	2
CRCW02014K53FNED D# 541-CRCW02014K53FNEDTR-ND	Vishay Dale	RES SMD 4.53K OHM 1% 1/20W 0201	0
W3580 D# 553-2632-ND	Pulse Electronics Corporation	NFC FERRITE LOADED ANTENNA	126
ERJ-P03J822V D# ERJ-P03J822V-ND	Panasonic Electronic Components	RES SMD 8.2 KOHM 5% 1/5W 0603	0
EXB-V4V243JV D# EXB-V4V243JV-ND	Panasonic Electronic Components	RES ARRAY 2 RES 24K OHM 0606	0

Numero di parte

Produttore

Descrizione

Azione

CRCW02014K53FNED

D# 2140148RL

Vishay Intertechnologies

RES, 4K53, 1%, 0.05W, 0201, THICK FILM

RoHS: Compliant

Min Qty: 10

Container: Reel

W3580

D# 2897260

Pulse Electronics Corporation

NFC ANTENNA, 13.56MHZ

RoHS: Compliant

Min Qty: 400

Container: Each

Numero di parte	Produttore	Descrizione	Azione
EXB-V4V243JV	Panasonic Electronic Components	RoHS: Compliant pbFree: Yes	0
CRCW02014K53FNED	Vishay Intertechnologies	RoHS: Compliant pbFree: Yes	0
ERJ-8ENF1152V	Panasonic Electronic Components	RoHS: Compliant pbFree: Yes	0
ECW-H12303JV	Panasonic Electronic Components	RoHS: Compliant pbFree: Yes	0
W3580	Pulse Electronics Corporation	RoHS: Compliant pbFree: Yes	0

Numero di parte	Produttore	Descrizione	Azione
XFP10GBDW3580AO	ADD-ON	OEM/CM QUOTES ONLY \| NO BROKERS	21
XFP10GBDW3580ACC	Accortec Inc	OEM/CM QUOTES ONLY \| NO BROKERS	952
SFP1GBDW3580ACC	Accortec Inc	OEM/CM QUOTES ONLY \| NO BROKERS	952
SFP10GBDW3580ACC	Accortec Inc	OEM/CM QUOTES ONLY \| NO BROKERS	952
SFP10GBDW3580AO	ADD-ON	OEM/CM QUOTES ONLY \| NO BROKERS	96
XFP10GBCW3580ACC	Accortec Inc	OEM/CM QUOTES ONLY \| NO BROKERS	952
W3580	PULSELARSEN ANTENNAS	OEM/CM QUOTES ONLY \| NO BROKERS	231
SFP1GBCW3580ACC	Accortec Inc	OEM/CM QUOTES ONLY \| NO BROKERS	582
SFP1GBDW3580AO	ADD-ON	OEM/CM QUOTES ONLY \| NO BROKERS	32
SFP1GBCW3580AO	ADD-ON	OEM/CM QUOTES ONLY \| NO BROKERS	51
W3580T0055	Pulse Electronics	OEM/CM QUOTES ONLY \| NO BROKERS	48
SFP10GBCW3580ACC	Accortec Inc	OEM/CM QUOTES ONLY \| NO BROKERS	670
TXN22120CW3580AO	ADD-ON	OEM/CM QUOTES ONLY \| NO BROKERS	51

Numero di parte

Produttore

Descrizione

Azione

W3580

Pulse Electronics Corporation

RoHS: Compliant

400

ERJ-8ENF1152V

Panasonic Electronic Components

Res Thick Film 1206 11.5K Ohm 1% 0.25W(1/4W) ±100ppm/°C Pad SMD Automotive T/R

RoHS: Compliant

50000

Numero di parte

Produttore

Descrizione

Azione

ERJ-8ENF1152V

D# 667-ERJ-8ENF1152V

Panasonic Electronic Components

Thick Film Resistors - SMD 1206 11.5Kohms 1% AEC-Q200

RoHS: Compliant

18890

W3580

D# 673-W3580

Pulse Electronics Corporation

Antennas NFC FERRITE ANTENNA SEMI-FLEX

RoHS: Compliant

117

Numero di parte	Produttore	Descrizione	Azione
SFP-10GB-CW-35-80-AO	ADDON	AddOn - SFP+ transceiver module - 10 GigE - 10GBase-CWDM - LC single-mode - up to 49.7 miles - 1350 nm - TAA Compliant RoHS: Compliant	0
SFP-10GB-DW35-80-AO	ADD-ON	ADDON MSA COMP 10GBASE-DWDM TAA XCVR RoHS: Compliant	79
XFP-10GB-CW35-80-AO	ADDON	AddOn - XFP transceiver module - 10 GigE - 10GBase-CWDM - LC single-mode - up to 49.7 miles - 1350 nm - TAA Compliant RoHS: Compliant	0
TXN22120-CW35-80-AO	ADD-ON	ADDON INTEL COMPATIBLE TAA COMPLIANT 1000BASE-CWDM SFP TRANSCEIVER (SMF, 1350NM, RoHS: Compliant	3
SFP-1GB-DW35-80-AO	ADD-ON	ADDON MSA COMP 1000BASE-DWDM TAA XCVR RoHS: Compliant	9
XFP-10GB-DW35-80-AO	ADD-ON	ADDON MSA COMP 10GBASE-DWDM TAA XCVR RoHS: Compliant	18
SFP-1GB-CW-35-80-AO	ADD-ON	ADDON MSA COMP 1000BASE-CWDM TAA XCVR RoHS: Compliant	3

Numero di parte	Produttore	Descrizione	Azione
SFP-10GB-CW-35-80-AO D# XSDXTD000019936	Addonics Technologies Inc	AddOn - SFP+ transceiver module - 10 GigE - 10GBase-CWDM - LC single-mode - up to 49.7 miles - 1350 nm - TAA Compliant	0
SFP-10GB-DW35-80-AO D# XSDXTD000019866	Addonics Technologies Inc	AddOn - SFP+ transceiver module - 10 GigE - 10GBase-DWDM - LC single-mode - up to 49.7 miles - channel: 35 - 1549.32 nm - TAA Compliant	0
XFP-10GB-CW35-80-AO D# XSDXTD000033790	Addonics Technologies Inc	AddOn - XFP transceiver module - 10 GigE - 10GBase-CWDM - LC single-mode - up to 49.7 miles - 1350 nm - TAA Compliant	0
TXN22120-CW35-80-AO D# XSDXS0000049783	ADD-ON	ADDON INTEL COMPATIBLE TAA COMPLIANT 1000BASE-CWDM SFP TRANSCEIVER (SMF, 1350NM,	3
SFP-1GB-DW35-80-AO D# XSDXTD000019707	Addonics Technologies Inc	AddOn - SFP (mini-GBIC) transceiver module - GigE - 1000Base-DWDM - LC single-mode - up to 49.7 miles - channel: 35 - 1549.32 nm - TAA Compliant	0
XFP-10GB-DW35-80-AO D# XSDXTD000050493	Addonics Technologies Inc		0
SFP-1GB-CW-35-80-AO D# XSDXS0000045545	ADD-ON	ADDON MSA COMP 1000BASE-CWDM TAA XCVR	3

Numero di parte	Produttore	Descrizione	Azione
TW-13-09-S-D-170-SM D# 14W3580	Samtec Inc	2MM TERMINAL STRIPS RoHS: Not Compliant Min Qty: 1 Container: Bulk	0
ECW-H12303JV D# 49W3580	Panasonic Electronic Components	ECWH, Met Polyprop Film Cap Radial Lead RoHS Compliant: Yes RoHS: Compliant Min Qty: 100 Container: Bulk	0
ACA3108E20-15PB(F80)(A23) D# 25W3580	Amphenol Industrial Operations	ACA-B Plug RoHS: Not Compliant Min Qty: 12 Container: Bulk	0
W3580 D# 60AC3041	Pulse Electronics Corporation	NFC ANTENNA, 13.56MHZ, Antenna Type:NFC, Frequency Min:-, Frequency Max:13.56MHz, Antenna Mounting:Adhesive, Gain:-, VSWR:-, Input Power:-, Input Impedance:80ohm, Antenna Polarization:-, Product Range:- RoHS Compliant: Yes RoHS: Compliant Min Qty: 400 Container: Bulk	4
TW-30-02-LM-S-309-SM D# 16W3580	Samtec Inc	2MM TERMINAL STRIPS RoHS: Not Compliant Min Qty: 1 Container: Bulk	0
69-312B D# 85W3580	NTE Electronics Inc	LED STRIP, 600 LEDS, BLUE, 48W, Light Strip Length:5m, No. of LEDs:600LEDs, Illumination Color:Blue, Input Voltage:12VDC, Input Power:48W, IP Rating:IP20, Product Range:-, LED Color:Blue, LED Module Type:Board + LED, Power Rating:48WRoHS Compliant: Yes RoHS: Compliant Min Qty: 1 Container: Bulk	0
SM3102R-32-AFP D# 26W3580	Amphenol Industrial Operations	RECEPT RoHS: Not Compliant Min Qty: 67 Container: Bulk	0
TW-43-12-G-D-374-160 D# 17W3580	Samtec Inc	HEADER, 2 MM, THROUGH HOLE, 86 CONTACTS, Product Range:TW Series, No. of Contacts:86Contacts, Gender:Header, Pitch Spacing:2mm, Contact Termination Type:Through Hole, No. of Rows:2Rows, Contact Plating:Gold Plated Contacts RoHS Compliant: Yes RoHS: Compliant Min Qty: 1 Container: Bulk	0
HX-SCE-1K-25.4-50-S1-4 D# 07W3580	TE Connectivity	HX-SCE-1K-25.4-50-S1-4 RoHS: Not Compliant Min Qty: 1000 Container: Bulk	0
TW-20-06-L-D-438-SM D# 15W3580	Samtec Inc	2MM TERMINAL STRIPS RoHS: Not Compliant Min Qty: 1 Container: Bulk	0
CRCW02014K53FNED D# 72W3580	Vishay Intertechnologies	RES, THICK FILM, 4K53, 1%, 0.05W, 0201, REEL, Resistance:4.53kohm, Resistance Tolerance:± 1%, Power Rating:50mW, Resistor Case Style:0201 [0603 Metric], Resistor Technology:Thick Film, Resistor Type:General Purpose RoHS Compliant: Yes RoHS: Compliant Min Qty: 10000 Container: TAPE & REEL - FULL	0
IPL1-115-01-L-D-G D# 08W3580	Samtec Inc	.100 TERMINAL ASSEMBLY RoHS: Not Compliant Min Qty: 1 Container: Bulk	0
ERJ-P03J822V D# 50W3580	Panasonic Electronic Components	Anti-Surge Chip Resistor 0603 RoHS Compliant: Yes RoHS: Compliant Min Qty: 5000 Container: TAPE & REEL - FULL	0
EXB-V4V243JV D# 52W3580	Panasonic Electronic Components	Resistor Array, Chip, 2 / 4 elements RoHS Compliant: Yes RoHS: Compliant Min Qty: 25000 Container: TAPE & REEL - FULL	0
ERJ-8ENF1152V D# 90W3580	Panasonic Electronic Components	RES, THICK FILM, 11K5, 1%, 0.25W, 1206, Resistance:11.5kohm, Resistance Tolerance:± 1%, Power Rating:250mW, Resistor Case Style:1206 [3216 Metric], Resistor Technology:Thick Film, Resistor Type:Precision, Product Range:ERJ Series RoHS Compliant: Yes RoHS: Compliant Min Qty: 50000 Container: Cut Tape	25773

Numero di parte	Produttore	Descrizione	Azione
EXB-V4V243JV D# NS-EXB-V4V243JV	Panasonic Electronic Components	OEM/CM ONLY	5839
W3580 D# NS-W3580	Pulse Electronics Corporation	OEM/CM ONLY	5324
CRCW02014K53FNED D# NS-CRCW02014K53FNED	Vishay Dale	OEM/CM ONLY	2097
ERJ-8ENF1152V D# NS-ERJ-8ENF1152V	Panasonic Electronic Components	OEM/CM ONLY	45018
ECW-H12303JV D# NS-ECW-H12303JV	Panasonic Electronic Components	OEM/CM ONLY	12394

Numero di parte

Produttore

Descrizione

Azione

ERJ-8ENF1152V

Panasonic Electronic Components

Res Thick Film 1206 11.5K Ohm 1% 0.25W(1/4W) ±100ppm/°C Pad SMD Automotive T/R

RoHS: Compliant

50000

W3580

Pulse Electronics Corporation

RoHS: Compliant

400

Numero di parte

Produttore

Descrizione

Azione

W3580

D# 000000000003849311

Pulse Electronics Corporation

Antennas NFC FERRITE ANTENNA SEMI-FLEX

EPM94CKW-3580

D# 000000000005174039

Honeywell Sensing and Control / MICRO SWITCH

Pushbutton Switches Sealed Operator Controls

Numero di parte

Produttore

Descrizione

Azione

SFP10GBDW3580AO

OEM/CM ONLY

W3580

Pulse Engineering Inc

OEM/CM ONLY

Numero di parte	Produttore	Descrizione	Azione
W3580	Pulse Electronics Corporation	Antennas NFC FERRITE ANTENNA SEMI-FLEX pbFree: Pb-Free	0
ERJ-8ENF1152V	Panasonic Electronic Components	Thick Film Resistors - SMD 1206 11.5Kohms 1% AEC-Q200 pbFree: Pb-Free	0
3-100141-0	TE Connectivity	Hard Metric Connectors Z-PACK/B ML HDR125P 2MM HM	0
D38999/24FF11PB	TE Connectivity	Circular MIL Spec Connector DTS 11C 11#16 PIN RECP	0

Numero di parte

Produttore

Descrizione

Azione

W3580

D# 53425756

Pulse Electronics Corporation

Antenna Flexible NFC Antenna 2-Pin

RoHS: Compliant

Numero di parte

Produttore

Descrizione

Azione

CRCW02014K53FNED

D# 2140148

Vishay Intertechnologies

RES, 4K53, 1%, 0.05W, 0201, THICK FILM

RoHS: Compliant

Min Qty: 50

Container: Cut Tape

W3580

D# 2897260

Pulse Electronics Corporation

NFC ANTENNA, 13.56MHZ

RoHS: Compliant

Min Qty: 1

Container: Each

Quick Inquiry

W3580

Qualità certificata

L'impegno di Heisener per la qualità ha plasmato i nostri processi di approvvigionamento, test, spedizione e ogni passo intermedio. Questa base è alla base di ogni componente che vendiamo.

ISO9001:2015, ICAS, IAF, UKAS