VO3063 구입 | VO3063는 데이터 시트 | Heisener.com
고객 문의
SalesDept@heisener.com +86-755-83210559 ext. 807

VO3063

hot VO3063

VO3063

참조 용으로 만 사용

부품 번호 VO3063
제조업체 Vishay Semiconductor Opto Division
설명 OPTOISOLATOR 5.3KV TRIAC 6DIP
데이터시트

VO3063 데이터시트

패키지 6-DIP (0.300", 7.62mm)
ECAD
재고 7,938 piece(s)
단가 Request a Quote
리드 타임 즉시 배송 가능
예상 배달 시간 7월 5 - 7월 10 (신속 배송 선택)
견적 요청
지불 방법
배달 서비스
  • 우리는 세계 시장에서 경쟁력있는 가격에 대한 VO3063를 제공하고, 우리에게 가격에 대한 할당량 요청을 보내 주시기 바랍니다. 고맙습니다!
  • 당신의 RFQ을 처리하기 위해, BOM에 수량 VO3063를 추가하십시오. Heisener.com는 VO3063의 견적을 요청하는 모든 등록이 필요하지 않습니다.

VO3063사양

제조업체Vishay Semiconductor Opto Division
범주절연기 - 광분리기 - 트라이액, SCR 출력
패키지6-DIP (0.300", 7.62mm)
ECAD
계열-
출력 유형Triac
제로 크로싱 회로Yes
채널 수1
전압 - 절연5300Vrms
전압 - 오프 상태600V
정적 dV / dt (최소)1.5kV/µs
전류 - LED 트리거 (Ift) (최대)5mA
전류 - 온 상태 (It (RMS)) (최대)100mA
전류 - 대기 (Ih)200µA (Typ)
시간 켜기-
전압 - 순방향 (Vf) (일반)1.2V
전류 - DC 순방향 (If) (최대)60mA
작동 온도-55°C ~ 100°C
실장 형Through Hole
패키지 / 케이스6-DIP (0.300", 7.62mm)
공급 업체 장치 패키지6-DIP
승인cUR, UR

VO3063는 데이터 시트

VO3063 Packaging

Customized Labels
Sealing
Packing
Insepction

VO3063 FAQ

  • 1. How to order VO3063 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 VO3063 is from the original manufacturer or authorized agents?
    We have a professional and experienced quality control team to strictly verify and test the VO3063. All suppliers must pass our qualification reviews before they can publish their products including VO3063 on Heisener; we pay more attention to the channels and quality of VO3063 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
  • 3. Are the VO3063 price and inventory displayed accurate?
    The price and inventory of VO3063 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 VO3063?
    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 VO3063 we delivered, we will accept the replacement or return of the VO3063 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 VO3063.
    (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 VO3063 pin diagram, VO3063 datasheet?
    If you need any after-sales service, please do not hesitate to contact us.

VO3063관련 제품

7M-40.000MAKV-T 7M-40.000MAKV-T TXC CORPORATION, CRYSTAL 40.0000MHZ 8PF SMD, 4-SMD, No Lead, - 전망
50YXH3.3MEFC5X11 50YXH3.3MEFC5X11 Rubycon, CAP ALUM RAD, -, - 전망
M2S010S-TQ144I M2S010S-TQ144I Microsemi Corporation, IC FPGA SOC, -, - 전망
0JLS175.X 0JLS175.X Littelfuse Inc., FUSE CRTRDGE 175A 600VAC CYLINDR, Cylindrical, Blade Terminals, - 전망
YR1B1K58CC YR1B1K58CC TE Connectivity Passive Product, RES 1.58K OHM 1/4W 0.1% AXIAL, Axial, - 전망
RE1206DRE0763K4L RE1206DRE0763K4L Yageo, RES SMD 63.4K OHM 0.5% 1/4W 1206, 1206 (3216 Metric), - 전망
FCC17A15PC64B FCC17A15PC64B Amphenol Commercial Products, CONN D-SUB PLUG 15POS R/A SOLDER, -, - 전망
1421900000 1421900000 Weidmuller, CB 1.6 26-24 TIN I1 4 250/PK, -, - 전망
DTS20W15-19PC DTS20W15-19PC TE Connectivity Deutsch Connectors, CONN RCPT 19POS FLANGE W/PINS, -, - 전망
75-68518-10S 75-68518-10S Amphenol Industrial Operations, CONN PLUG FMALE 4POS SILVR CRIMP, -, - 전망
1618648 1618648 Phoenix Contact, CONN PLUG HSNG MALE 8POS INLINE, -, - 전망
PMF-24V200WCGB PMF-24V200WCGB Delta Electronics, AC/DC CONVERTER 24V 202W, -, - 전망

VO3063 보증

Service Guarantee

서비스 보증

우리는 100 % 고객 만족을 보장합니다.

경험 많은 영업 팀과 기술 지원 팀이 모든 고객을 만족시키기 위해 서비스를 지원합니다.

Quality Guarantee

품질 보증

우리는 90 일 보증을 제공합니다.

수령 한 품목의 품질이 완벽하지 않은 경우 당사는 환불 또는 교체에 대한 책임을지며 품목은 원래 상태로 반환해야합니다.

글로벌 공급망-신뢰할 수 있고 공인 된 유통 업체 리소스

부품 번호 제조업체 설명 재고

VO3063-X016

D# V36:1790_09171080

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600V 6-Pin PDIP

RoHS: Compliant
0

VO3063

D# V99:2348_09171065

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600V 6-Pin PDIP

RoHS: Compliant
0

VO3063-X009T

D# E02:0323_06536104

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600V 6-Pin PDIP SMD T/R

RoHS: Compliant
0

VO3063-X006

D# V36:1790_09171073

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600V 6-Pin PDIP Tube

RoHS: Compliant
0

VO3063-X007T

D# V72:2272_09171076

Vishay Intertechnologies

Triac AC-OUT 1-CH 600V 6-Pin PDIP SMD T/R

RoHS: Compliant
0

VO3063-X017T

D# V36:1790_09171084

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600V 6-Pin PDIP SMD T/R

RoHS: Compliant
0
부품 번호 제조업체 설명 재고

VO3063

D# 93K1114

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP - Bulk (Alt: 93K1114)

0

VO3063-X006

D# VO3063-X006

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP - Tape and Reel (Alt: VO3063-X006)

0

VO3063-X009T

D# VO3063-X009T

Vishay Intertechnologies

DIP-6 TRIAC ZC 1.5KV/US 5MA VDE-E3 - Tape and Reel (Alt: VO3063-X009T)

0

VO3063-X007T

D# VO3063-X007T

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP SMD T/R - Tape and Reel (Alt: VO3063-X007T)

0

VO3063-X016

D# VO3063-X016

Vishay Intertechnologies

DIP-6 TRIAC ZC 1.5KV/US 5MA VDE-E3 - Tape and Reel (Alt: VO3063-X016)

0

VO3063-X017T

D# VO3063-X017T

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP SMD T/R - Tape and Reel (Alt: VO3063-X017T)

0
부품 번호 제조업체 설명 재고

VO3063

D# VO3063

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP (Alt: VO3063)

0

VO3063-X017T

D# VO3063-X017T

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP SMD T/R (Alt: VO3063-X017T)

0
부품 번호 제조업체 설명 재고

VO3063-X001

D# VO3063-X001

Vishay Intertechnologies

DIP-6 TRIAC ZC 1.5KV/US 5MA VDE-E3 (Alt: VO3063-X001)

0

VO3063-X017T

D# VO3063-X017T

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP SMD T/R (Alt: VO3063-X017T)

0

VO3063-X006

D# VO3063-X006

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP (Alt: VO3063-X006)

0

VO3063-X009T

D# VO3063-X009T

Vishay Intertechnologies

DIP-6 TRIAC ZC 1.5KV/US 5MA VDE-E3 (Alt: VO3063-X009T)

0

VO3063-X016

D# VO3063-X016

Vishay Intertechnologies

DIP-6 TRIAC ZC 1.5KV/US 5MA VDE-E3 (Alt: VO3063-X016)

0

VO3063-X007T

D# VO3063-X007T

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP SMD T/R (Alt: VO3063-X007T)

0

VO3063

D# VO3063

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP (Alt: VO3063)

0
부품 번호 제조업체 설명 재고

VO3063-X001

Vishay Intertechnologies

2000
부품 번호 제조업체 설명 재고

VO3063

Vishay Semiconductors

- Rail/Tube

1150

VO3063-X017T

Vishay Semiconductors

- Tape and Reel

0

VO3063-X001

Vishay Semiconductors

DIP-6 TRIAC ZC 1.5KV/US 5MA VDE-E3 - Tape and Reel

0

VO3063-X016

Vishay Semiconductors

OPTOCOUPLER, PHOTOTRIAC O/P, 5.3KV, DIP-6, Triac Operating Mode:Zero Crossing, Isolation Voltage:5.3kV, Peak Repetitive Off-State Voltage, Vdrm:600V, Optocoupler Case Style:DIP, No. of Pins:6, Packaging:Each, Input Current:60mA , RoHS Compliant: Yes

0

VO3063-X006

Vishay Semiconductors

- Rail/Tube

1150

VO3063-X009T

Vishay Semiconductors

DIP-6 TRIAC ZC 1.5KV/US 5MA VDE-E3 - Tape and Reel

0

VO3063-X007T

Vishay Semiconductors

- Rail/Tube

0
부품 번호 제조업체 설명 재고

VO3063

Vishay Intertechnologies

1 Triac 5300Vrms 100mA DIP-6 Triac Optocouplers RoHS

96

VO3063-X007T

Vishay Intertechnologies

1 Triac 5300Vrms 100mA SMD-6 Triac Optocouplers RoHS

6
부품 번호 제조업체 설명 재고

VO3063-X001

D# VO3063-X001-ND

Vishay Semiconductors

OPTOISOLATOR 5.3KV TRIAC 6DIP

0

VO3063-X006

D# VO3063-X006-ND

Vishay Semiconductors

OPTOISOLATOR 5.3KV TRIAC 6DIP

108

VO3063-X007T

D# VO3063-X007TCT-ND

Vishay Semiconductors

OPTOISOLATOR 5.3KV TRIAC 6SMD

2998

VO3063-X016

D# VO3063-X016-ND

Vishay Semiconductors

OPTOISOLATOR 5.3KV TRIAC 6DIP

1308

VO3063-X009T

D# VO3063-X009T-ND

Vishay Semiconductors

OPTOISOLATOR 5.3KV TRIAC 6SMD

0

VO3063

D# 751-1383-5-ND

Vishay Semiconductors

OPTOISOLATOR 5.3KV TRIAC 6DIP

0

VO3063-X017T

D# VO3063-X017TCT-ND

Vishay Semiconductors

OPTOISOLATOR 5.3KV TRIAC 6SMD

5879
부품 번호 제조업체 설명 재고

VO3063

D# 1779729

Vishay Intertechnologies

PH.TRIAC, ZC, 600V, 5MA, 1.5K DV/DT, DIP

RoHS: Compliant
Min Qty: 10
Container: Each
0
부품 번호 제조업체 설명 재고

VO3063-X001

Vishay Intertechnologies

RoHS: Compliant
pbFree: Yes
0

VO3063-X006

Vishay Intertechnologies

OPTOISOLATOR 5.3KV TRIAC 6DIP

RoHS: Compliant
pbFree: Yes
0

VO3063-X007T

Vishay Intertechnologies

Optoisolator Triac Output 5300Vrms 1 Channel 6-SMD

RoHS: Compliant
pbFree: Yes
0

VO3063-X016

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP

RoHS: Compliant
pbFree: Yes
0

VO3063-X009T

Vishay Intertechnologies

RoHS: Compliant
pbFree: Yes
0

VO3063

Vishay Intertechnologies

VO03063 Series 5.3 kV 100 mA Phototriac Out Zero Crossing Optocoupler - DIP-6

RoHS: Compliant
pbFree: Yes
0

VO3063-X017T

Vishay Intertechnologies

Triac & SCR Output Optocouplers Phototriac ZC 1.5kV/us 5mA VDE

RoHS: Compliant
pbFree: Yes
0
부품 번호 제조업체 설명 재고

VO3063D

Vishay Intertechnologies

OEM/CM Immediate delivery

4808

VO3063-X007T

Vishay Intertechnologies

OEM/CM Immediate delivery

88000

VO3063

Vishay Intertechnologies

OEM/CM Immediate delivery

11135

VO3063D-X007T

Vishay Intertechnologies

OEM/CM Immediate delivery

10826

VO3063-X017T

Vishay Intertechnologies

OEM/CM Immediate delivery

145
부품 번호 제조업체 설명 재고

VO3063-X016

D# 78-VO3063-X016

Vishay Intertechnologies

Triac & SCR Output Optocouplers Phototriac ZC 1.5kV/us 5mA VDE

RoHS: Compliant
2244

VO3063

D# 782-VO3063

Vishay Intertechnologies

Triac & SCR Output Optocouplers Zero Crossing Photo Triac

RoHS: Compliant
6038

VO3063-X009T

D# 78-VO3063-X009T

Vishay Intertechnologies

Triac & SCR Output Optocouplers Phototriac ZC 1.5kV/us 5mA VDE

RoHS: Compliant
980

VO3063-X006

D# 782-VO3063-X006

Vishay Intertechnologies

Triac & SCR Output Optocouplers Zero Crossing Photo Triac 600V 5mA

RoHS: Compliant
2868

VO3063-X007T

D# 782-VO3063-X007T

Vishay Intertechnologies

Triac & SCR Output Optocouplers Zero Crossing Photo Triac 600V 5mA

RoHS: Compliant
1997

VO3063-X017T

D# 78-VO3063-X017T

Vishay Intertechnologies

Triac & SCR Output Optocouplers Phototriac ZC 1.5kV/us 5mA VDE

RoHS: Compliant
1989
부품 번호 제조업체 설명 재고

VO3063-X016

D# XSKDRABV0029724

Vishay Intertechnologies

LogicICOutputOptocoupler,1-Element,4000VIsolation,10MBps

900

VO3063

D# XSFP00000092983

Vishay Semiconductors

VO03063 Series 5.3 kV 100 mA Phototriac Out Zero Crossing Optocoupler - DIP-6

2300

VO3063-X006

D# XSFP00000196091

Vishay Semiconductors

800
부품 번호 제조업체 설명 재고

VO3063

D# 93K1114

Vishay Intertechnologies

OPTOCOUPLER, TRIAC, 5300VRMS, Optocoupler Case Style:DIP, No. of Pins:6Pins, Isolation Voltage:5.3kV, Triac Operating Mode:Zero Crossing, Peak Repetitive Off-State Voltage, Vdrm:600V, Product Range:-, Forward Current If:5mA RoHS Compliant: Yes

RoHS: Compliant
Min Qty: 1
Container: Bulk
967

VO3063-X009T

D# 62W1295

Vishay Intertechnologies

OPTOCOUPLER, PHOTOTRIAC O/P, 5.3KV, SMD-6, FULL REEL, Optocoupler Case Style:Surface Mount DIP, No. of Pins:6Pins, Isolation Voltage:5.3kV, Triac Operating Mode:Zero Crossing, Peak Repetitive Off-State Voltage, Vdrm:600V RoHS Compliant: Yes

RoHS: Compliant
Min Qty: 1000
Container: TAPE & REEL - FULL
0
부품 번호 제조업체 설명 재고

VO3063-X017T

D# NS-VO3063-X017T

Vishay Semiconductors

OEM/CM ONLY

3656

VO3063

D# NS-VO3063

Vishay Semiconductors

OEM/CM ONLY

2069

VO3063-X006

D# NS-VO3063-X006

Vishay Semiconductors

OEM/CM ONLY

1673

VO3063-X001

D# NS-VO3063-X001

Vishay Semiconductors

OEM/CM ONLY

1958

VO3063-X009T

D# NS-VO3063-X009T

Vishay Semiconductors

OEM/CM ONLY

1419

VO3063-X007T

D# NS-VO3063-X007T

Vishay Semiconductors

OEM/CM ONLY

7859

VO3063-X016

D# NS-VO3063-X016

Vishay Semiconductors

OEM/CM ONLY

9863
부품 번호 제조업체 설명 재고

VO3063

D# 1807057

Vishay Intertechnologies

Vishay Through Hole, 6-pin, TRIAC, 6V, Gate Trigger 22V 600V, TU

Min Qty: 50
Container: Tube
1770
부품 번호 제조업체 설명 재고

VO3063-X017T

D# IRCOUP1913

Vishay Intertechnologies

PHOTOTRIAC ZC,5mA,600V SMD6 VDE

RoHS: Compliant
0
부품 번호 제조업체 설명 재고

VO3063X017T

Vishay Intertechnologies

OEM/CM ONLY

2095

VO3063X009T

Vishay Intertechnologies

OEM/CM ONLY

1016

VO3063X016

Vishay Intertechnologies

OEM/CM ONLY

1415

VO3063X006

Vishay Intertechnologies

OEM/CM ONLY

993

VO3063

Vishay Semiconductors

OEM/CM ONLY

2052

VO3063X007T

Vishay Semiconductors

OEM/CM ONLY

140016

VO3063X001

Vishay Intertechnologies

OEM/CM ONLY

2016
부품 번호 제조업체 설명 재고

VO3063D

Vishay Intertechnologies

IN stock Immediate delivery

4823

VO3063

Vishay Intertechnologies

IN stock Immediate delivery

11150

VO3063D-X007T

Vishay Intertechnologies

IN stock Immediate delivery

10841

VO3063-X017T

Vishay Intertechnologies

IN stock Immediate delivery

140

VO3063-X007T

Vishay Intertechnologies

IN stock Immediate delivery

87985
부품 번호 제조업체 설명 재고

VO3063-X017T

Vishay Intertechnologies

Triac & SCR Output Optocouplers Phototriac ZC 1.5kV/us 5mA VDE

pbFree: Pb-Free
0

VO3063-X001

Vishay Intertechnologies

Triac & SCR Output Optocouplers Phototriac ZC 1.5kV/us 5mA VDE

pbFree: Pb-Free
0

VO3063-X006

Vishay Intertechnologies

Triac & SCR Output Optocouplers Zero Crossing Photo Triac 600V 5mA

pbFree: Pb-Free
0

VO3063-X007T

Vishay Intertechnologies

Triac & SCR Output Optocouplers Zero Crossing Photo Triac 600V 5mA

pbFree: Pb-Free
0

VO3063-X016

Vishay Intertechnologies

Triac & SCR Output Optocouplers Phototriac ZC 1.5kV/us 5mA VDE

pbFree: Pb-Free
0

VO3063-X009T

Vishay Intertechnologies

Triac & SCR Output Optocouplers Phototriac ZC 1.5kV/us 5mA VDE

pbFree: Pb-Free
0

VO3063

Vishay Intertechnologies

Triac & SCR Output Optocouplers Zero Crossing Photo Triac

pbFree: Pb-Free
0
부품 번호 제조업체 설명 재고

VO3063-X017

Vishay Huntington

shipping today

12496

VO3063D-X001

VISHA

shipping today

39

VO3063D-X017T

VISHA

shipping today

39

VO3063D-X007T

VISHA

shipping today

39

VO3063D-X016

VISHA

shipping today

39

VO3063

VISHA

shipping today

39

VO3063D-X017

VISHA

shipping today

39

VO3063-X017T

Texas Instruments

shipping today

466

VO3063D-X006

VISHA

shipping today

39

VO3063D-X007

VISHA

shipping today

39
부품 번호 제조업체 설명 재고

VO3063

D# 43242225

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600V 6-Pin PDIP

RoHS: Compliant
0

VO3063-X009T

D# 46910567

Vishay Intertechnologies

Optocoupler Triac AC-OUT 1-CH 600V 6-Pin PDIP SMD T/R

RoHS: Compliant
0

Quick Inquiry

VO3063

공인 품질

Heisener의 품질에 대한 약속은 소싱, 테스트, 선적 및 그 사이의 모든 단계에 대한 프로세스를 형성했습니다. 이 기초는 우리가 판매하는 각 구성 요소의 근간을 이루고 있습니다.

ISO9001:2015, ICAS, IAF, UKAS

인증서보기

고객 문의

당신은 VO3063 에 대한 질문이 있습니까?

VO3063 QRCode

이 페이지를 보려면 스캔

주요 제품

B3F-4050

SWITCH TACTILE SPST-NO 0.05A 24V

MLX92251LSE-AAA-000-RE

MAGNET SWITCH LATCH DUAL TSOT23

BAT41ZFILM

DIODE SCHOTTKY 100V 200MA SOD123

CM200C32768AZFT

CRYSTAL 32.7680KHZ 12.5PF SMD

CAT24C256WI-GT3

IC EEPROM 256KBIT 400KHZ 8SOIC

FT230XS-U

IC USB SERIAL BASIC UART 16SSOP

M29W200BB70N1

IC FLASH 2MBIT 70NS 48TSOP

MGA-31589-TR1G

IC HIGH GAIN DRVR 0.5W AMP SO89

CK45-R3DD102KAVRA

CAP CER DISC RADIAL

NM93CS46M8

IC EEPROM 1K SPI 1MHZ 8SO

더 많이보기 »

VO3063 Tags

  • VO3063
  • VO3063 PDF
  • VO3063 데이터 시트
  • VO3063 사양
  • VO3063 영상
  • Vishay Semiconductor Opto Division
  • Vishay Semiconductor Opto Division VO3063
  • VO3063 구매
  • VO3063 가격
  • VO3063 살수 장치
  • VO3063 공급자
  • VO3063 도매

VO3063는 사용할 수 있습니다