SMCJ8.0CA

SMCJ8.0CA
Mfr. #:
SMCJ8.0CA
制造商:
Bourns
描述:
TVS Diodes - Transient Voltage Suppressors 8Vr 1500W 110.3A 5% BiDirectional
生命周期:
制造商新产品。
数据表:
SMCJ8.0CA 数据表
交货:
DHL FedEx Ups TNT EMS
支付:
T/T Paypal Visa MoneyGram Western Union
ECAD Model:
更多信息:
SMCJ8.0CA 更多信息
产品属性
属性值
制造商
Littelfuse 公司
产品分类
TVS - 二极管
系列
SMCJ
类型
齐纳
打包
Digi-ReelR 替代包装
部分别名
SMCJ8.0CA-H
单位重量
0.007408 oz
安装方式
贴片/贴片
终止式
贴片/贴片
工作温度范围
- 65 C to + 150 C
高度
2.62 mm
长度
8.13 mm
宽度
6.22 mm
包装盒
DO-214AB, SMC
工作温度
-55°C ~ 150°C (TJ)
安装型
表面贴装
应用
一般用途
供应商-设备-包
DO-214AB (SMCJ)
单向通道
-
双向通道
1
反向电压隔离型
8V
电压击穿最小值
8.89V
电压钳位最大 Ipp
13.6V
电流-峰值-脉冲-10-1000μs
110.3A
功率峰值脉冲
1500W (1.5kW)
电力线保护
电容频率
-
钯功耗
1.5 kW
最高工作温度
+ 150 C
最低工作温度
- 65 C
击穿电压
8.89 V
钳位电压
13.6 V
峰值浪涌电流
110.3 A
工作电压
8 V
极性
双向
Tags
SMCJ8.0CA, SMCJ8.0C, SMCJ8.0, SMCJ8, SMCJ, SMC
Service Guarantees

We guarantee 100% customer satisfaction.

Quality Guarantees

We provide 90-360 days warranty.

If the items you received were not in perfect quality, we would be responsible for your refund or replacement, but the items must be returned in their original condition.
Our experienced sales team and tech support team back our services to satisfy all our customers.

we buy and manage excess electronic components, including excess inventory identified for disposal.
Email us if you have excess stock to sell.

Email: [email protected]

Step1: Vacuum Packaging with PL
Step1:
Vacuum Packaging with PL
Step2: Anti-Static Bag
Step2:
Anti-Static Bag
Step3: Packaging Boxes
Step3:
Packaging Boxes
***ure Electronics
SMCJ Series 1500 W 8 V Surface Mount Bi-Directional TVS Diode - DO-214AB
***ark
Transient Suppressor Diode,Single,Bidirectional,8V V(Rwm),Do-214Ab / Smc
***ical
Diode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R
***ied Electronics & Automation
TVS DIODE 1.5KW 8.0V 5% BI DO-214AB
***i-Key
TVS DIODE 8V 13.6V DO214AB
***
1.5KW 8.0VBR BI DO214AB
SMxJ Transient Voltage Suppressor Diodes
Bourns SMxJ Transient Voltage Suppressor (TVS) Diodes come in compact chip package-size formats for surge and ESD protection applications. These Bourns Transient Voltage Suppressor Diodes meet the needs of the portable communications, computing, and video equipment markets for increasingly smaller electronic components. The SMAJ, SMBJ, and SMCJ feature a surface mount package design and standoff voltage from 5.0V to 495V. These Bourns TVS Diodes also provide power dissipation of 400W (SMAJ), 600W (SMBJ), and 1500W (SMCJ). SMxJ devices comply with IEC 61000-4-2 ESD (Min. Level 4), IEC 61000-4-4 EFT, and IEC 61000-4-5 Surge industry standards.
TVS Diodes
Bourns surface mount TVS diodes are low capacitance devices that provide ESD, EFT, and surge protection for external ports of electronic devices such as cellular phones, handheld electronics and other portable electronic devices. Bourns TVS Diodes include smaller chip diodes that have the capability to provide a silicon diode with minimal packaging overhead. The chip diodes 0603, 1005, 1408, and 2010 are leadless, allowing for maximum space on PCB layouts. All Bourns diodes are RoHS compliant and meet many worldwide industry and government regulations on lead free components. TVS package diode design kits are also available from Bourns.
型号 制造商 描述 库存 价格
SMCJ8.0CA
DISTI # V72:2272_06261322
Bourns IncDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R
RoHS: Compliant
12000
  • 6000:$0.1959
  • 3000:$0.1980
  • 1000:$0.2378
  • 500:$0.2960
  • 250:$0.3473
  • 100:$0.3511
  • 25:$0.4556
  • 10:$0.4607
  • 1:$0.5879
SMCJ8.0CA
DISTI # V72:2272_06470670
Littelfuse IncDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin DO-214AB T/R
RoHS: Compliant
6000
  • 6000:$0.1978
  • 3000:$0.1994
  • 1000:$0.2399
  • 500:$0.2992
  • 250:$0.3512
  • 100:$0.3550
  • 25:$0.4621
  • 10:$0.4672
  • 1:$0.5983
SMCJ8.0CA-TP
DISTI # SMCJ8.0CA-TPMSCT-ND
Micro Commercial ComponentsTVS DIODE 8V 13.6V DO214AB
RoHS: Compliant
Min Qty: 1
Container: Cut Tape (CT)
8611In Stock
  • 1000:$0.2537
  • 500:$0.3283
  • 250:$0.3880
  • 100:$0.4477
  • 25:$0.5224
  • 10:$0.5970
  • 1:$0.7100
SMCJ8.0CA-TP
DISTI # SMCJ8.0CA-TPMSDKR-ND
Micro Commercial ComponentsTVS DIODE 8V 13.6V DO214AB
RoHS: Compliant
Min Qty: 1
Container: Digi-Reel®
8611In Stock
  • 1000:$0.2537
  • 500:$0.3283
  • 250:$0.3880
  • 100:$0.4477
  • 25:$0.5224
  • 10:$0.5970
  • 1:$0.7100
SMCJ8.0CA
DISTI # SMCJ8.0CABCT-ND
Bourns IncTVS DIODE 8V 13.6V SMC
RoHS: Compliant
Min Qty: 1
Container: Cut Tape (CT)
8090In Stock
  • 1000:$0.2666
  • 500:$0.3450
  • 250:$0.4077
  • 100:$0.4705
  • 25:$0.5488
  • 10:$0.6270
  • 1:$0.7400
SMCJ8.0CA
DISTI # SMCJ8.0CABDKR-ND
Bourns IncTVS DIODE 8V 13.6V SMC
RoHS: Compliant
Min Qty: 1
Container: Digi-Reel®
8090In Stock
  • 1000:$0.2666
  • 500:$0.3450
  • 250:$0.4077
  • 100:$0.4705
  • 25:$0.5488
  • 10:$0.6270
  • 1:$0.7400
SMCJ8.0CA-13-F
DISTI # SMCJ8.0CA-FDICT-ND
Diodes IncorporatedTVS DIODE 8V 13.6V SMC
RoHS: Compliant
Min Qty: 1
Container: Cut Tape (CT)
5004In Stock
  • 1000:$0.7138
  • 500:$0.9041
  • 100:$1.0945
  • 10:$1.4040
  • 1:$1.5700
SMCJ8.0CA
DISTI # SMCJ8.0CALFCT-ND
Littelfuse IncTVS DIODE 8V 13.6V DO214AB
RoHS: Compliant
Min Qty: 1
Container: Cut Tape (CT)
3090In Stock
  • 1000:$0.3133
  • 500:$0.3916
  • 250:$0.4601
  • 100:$0.5287
  • 25:$0.6068
  • 10:$0.6850
  • 1:$0.7800
SMCJ8.0CA
DISTI # SMCJ8.0CALFDKR-ND
Littelfuse IncTVS DIODE 8V 13.6V DO214AB
RoHS: Compliant
Min Qty: 1
Container: Digi-Reel®
3090In Stock
  • 1000:$0.3133
  • 500:$0.3916
  • 250:$0.4601
  • 100:$0.5287
  • 25:$0.6068
  • 10:$0.6850
  • 1:$0.7800
SMCJ8.0CA
DISTI # SMCJ8.0CABTR-ND
Bourns IncTVS DIODE 8V 13.6V SMC
RoHS: Compliant
Min Qty: 3000
Container: Tape & Reel (TR)
3000In Stock
  • 15000:$0.2055
  • 6000:$0.2208
  • 3000:$0.2360
SMCJ8.0CA-TP
DISTI # SMCJ8.0CA-TPMSTR-ND
Micro Commercial ComponentsTVS DIODE 8V 13.6V DO214AB
RoHS: Compliant
Min Qty: 3000
Container: Tape & Reel (TR)
3000In Stock
  • 15000:$0.1956
  • 6000:$0.2101
  • 3000:$0.2246
SMCJ8.0CA-13
DISTI # SMCJ8.0CADICT-ND
Diodes IncorporatedTVS DIODE 8V 13.6V SMC
RoHS: Not compliant
Min Qty: 1
Container: Cut Tape (CT)
323In Stock
  • 100:$1.0945
  • 10:$1.4040
  • 1:$1.5700
MSMCJ8.0CAE3
DISTI # 1086-8656-ND
Microsemi CorporationTVS DIODE 8V 13.6V DO214AB
RoHS: Not compliant
Min Qty: 1
Container: Bulk
200In Stock
  • 100:$2.2275
  • 25:$2.4752
  • 10:$2.7720
  • 1:$3.0700
SMCJ8.0CA-13-F
DISTI # SMCJ8.0CA-FDIDKR-ND
Diodes IncorporatedTVS DIODE 8V 13.6V SMC
RoHS: Compliant
Min Qty: 1
Container: Digi-Reel®
Limited Supply - Call
    SMCJ8.0CA-13
    DISTI # SMCJ8.0CADITR-ND
    Diodes IncorporatedTVS DIODE 8V 13.6V SMC
    RoHS: Not compliant
    Min Qty: 30000
    Container: Tape & Reel (TR)
    Limited Supply - Call
      SMCJ8.0CA
      DISTI # SMCJ8.0CALFTR-ND
      Littelfuse IncTVS DIODE 8V 13.6V DO214AB
      RoHS: Compliant
      Min Qty: 3000
      Container: Tape & Reel (TR)
      Temporarily Out of Stock
      • 15000:$0.2540
      • 6000:$0.2572
      • 3000:$0.2762
      SMCJ8.0CA-13-F
      DISTI # SMCJ8.0CA-FDITR-ND
      Diodes IncorporatedTVS DIODE 8V 13.6V SMC
      RoHS: Compliant
      Min Qty: 3000
      Container: Tape & Reel (TR)
      Temporarily Out of Stock
        SMCJ8.0CA
        DISTI # 30275567
        Bourns IncDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R
        RoHS: Compliant
        12000
        • 6000:$0.1959
        • 3000:$0.1980
        • 1000:$0.2378
        • 500:$0.2960
        • 250:$0.3473
        • 100:$0.3511
        • 35:$0.4556
        SMCJ8.0CA
        DISTI # 31029299
        Littelfuse IncDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin DO-214AB T/R
        RoHS: Compliant
        6000
        • 6000:$0.1978
        • 3000:$0.1994
        • 1000:$0.2399
        • 500:$0.2992
        • 250:$0.3512
        • 100:$0.3550
        • 30:$0.4621
        SMCJ8.0CA
        DISTI # 27637279
        Bourns IncDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R
        RoHS: Compliant
        2400
        • 1800:$0.2218
        • 1200:$0.2328
        • 600:$0.2411
        SMCJ8.0CA
        DISTI # SMCJ8.0CA
        Bourns IncTVS BIDIRECT DIODE - Tape and Reel (Alt: SMCJ8.0CA)
        RoHS: Not Compliant
        Min Qty: 12000
        Container: Reel
        Americas - 0
        • 12000:$0.2079
        • 18000:$0.1399
        • 30000:$0.1349
        • 60000:$0.1299
        • 120000:$0.1279
        SMCJ8.0CA-13-F
        DISTI # SMCJ8.0CA-13-F
        Diodes IncorporatedDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R - Tape and Reel (Alt: SMCJ8.0CA-13-F)
        RoHS: Compliant
        Min Qty: 3000
        Container: Reel
        Americas - 0
        • 3000:$0.2309
        • 6000:$0.2199
        • 12000:$0.2099
        • 18000:$0.1999
        • 30000:$0.1959
        SMCJ8.0CA-E3/9AT
        DISTI # SMCJ8.0CA-E3/9AT
        Vishay IntertechnologiesDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R - Tape and Reel (Alt: SMCJ8.0CA-E3/9AT)
        RoHS: Compliant
        Min Qty: 3500
        Container: Reel
        Americas - 0
        • 3500:$0.1919
        • 7000:$0.1859
        • 14000:$0.1779
        • 21000:$0.1729
        • 35000:$0.1689
        SMCJ8.0CA-M3/57T
        DISTI # SMCJ8.0CA-M3/57T
        Vishay IntertechnologiesDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R (Alt: SMCJ8.0CA-M3/57T)
        RoHS: Compliant
        Min Qty: 3400
        Americas - 0
        • 3400:$0.4069
        • 5100:$0.3949
        • 8500:$0.3789
        • 17000:$0.3679
        • 34000:$0.3579
        SMCJ8.0CAHE3/57T
        DISTI # SMCJ8.0CAHE3/57T
        Vishay IntertechnologiesDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R - Tape and Reel (Alt: SMCJ8.0CAHE3/57T)
        RoHS: Compliant
        Min Qty: 1700
        Container: Reel
        Americas - 0
        • 1700:$0.4069
        • 3400:$0.3949
        • 5100:$0.3789
        • 8500:$0.3679
        • 17000:$0.3579
        SMCJ8.0CA-M3/9AT
        DISTI # SMCJ8.0CA-M3/9AT
        Vishay IntertechnologiesDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R (Alt: SMCJ8.0CA-M3/9AT)
        RoHS: Compliant
        Min Qty: 3500
        Americas - 0
        • 3500:$0.4069
        • 7000:$0.3949
        • 14000:$0.3789
        • 21000:$0.3679
        • 35000:$0.3579
        SMCJ8.0CA-E3/57T
        DISTI # SMCJ8.0CA-E3/57T
        Vishay IntertechnologiesDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R - Tape and Reel (Alt: SMCJ8.0CA-E3/57T)
        RoHS: Compliant
        Min Qty: 1700
        Container: Reel
        Americas - 0
        • 1700:$0.1919
        • 3400:$0.1859
        • 5100:$0.1779
        • 8500:$0.1729
        • 17000:$0.1689
        SMCJ8.0CAHE3/9AT
        DISTI # SMCJ8.0CAHE3/9AT
        Vishay IntertechnologiesDiode TVS Single Bi-Dir 8V 1.5KW 2-Pin SMC T/R - Tape and Reel (Alt: SMCJ8.0CAHE3/9AT)
        RoHS: Compliant
        Min Qty: 3500
        Container: Reel
        Americas - 0
        • 3500:$0.4069
        • 7000:$0.3949
        • 14000:$0.3789
        • 21000:$0.3679
        • 35000:$0.3579
        SMCJ8.0CA
        DISTI # 67R0305
        Bourns IncDIODE, FULL REEL,Product Range:SMCJ Series,TVS Polarity:Bidirectional,Reverse Stand-Off Voltage Vrwm:8V,Clamping Voltage Vc Max:13.6V,Diode Case Style:DO-214AB,No. of Pins:2Pins,Breakdown Voltage Min:8.89V RoHS Compliant: Yes0
        • 1:$0.2210
        • 3000:$0.2210
        • 6000:$0.1960
        • 9000:$0.1890
        • 15000:$0.1820
        SMCJ8.0CA-E3/57T.
        DISTI # 23AC9648
        Vishay IntertechnologiesProduct Range:TRANSZORB SMCJ Series,TVS Polarity:Bidirectional,Reverse Stand-Off Voltage Vrwm:8V,Clamping Voltage Vc Max:13.6V,Diode Case Style:DO-214AB,No. of Pins:2Pins,Breakdown Voltage Min:8.89V,Breakdown Voltage Max:9.83VRoHS Compliant: Yes0
        • 1:$0.3190
        • 1700:$0.2690
        SMCJ8.0CA
        DISTI # 652-SMCJ8.0CA
        Bourns IncESD Suppressors / TVS Diodes 8volts 50uA 110.3 Amps Bi-Dir
        RoHS: Compliant
        15768
        • 1:$0.6300
        • 10:$0.4850
        • 100:$0.3680
        • 500:$0.3130
        • 1000:$0.2500
        • 3000:$0.2050
        • 9000:$0.1970
        • 24000:$0.1900
        SMCJ8.0CA
        DISTI # 576-SMCJ8.0CA
        Littelfuse IncESD Suppressors / TVS Diodes 1.5kW 8V 5% Bi-Directional
        RoHS: Compliant
        5092
        • 1:$0.6800
        • 10:$0.5210
        • 100:$0.3950
        • 500:$0.3360
        • 1000:$0.2690
        SMCJ8.0CA-TP
        DISTI # 833-SMCJ8.0CA-TP
        Micro Commercial ComponentsESD Suppressors / TVS Diodes 8V 1500 Watts
        RoHS: Compliant
        3000
        • 1:$0.7100
        • 10:$0.5230
        • 100:$0.4180
        • 500:$0.3290
        • 1000:$0.2470
        • 3000:$0.2250
        • 6000:$0.2110
        • 24000:$0.1940
        SMCJ8.0CA-H
        DISTI # 652-SMCJ8.0CA-H
        Bourns IncESD Suppressors / TVS Diodes 8volts 50uA 110.3 Amps Bi-Dir
        RoHS: Compliant
        0
        • 1:$0.6700
        • 10:$0.4990
        • 100:$0.3700
        • 500:$0.3140
        • 1000:$0.2350
        • 1500:$0.2010
        • 9000:$0.1870
        • 24000:$0.1770
        SMCJ8.0CA-13-F
        DISTI # 621-SMCJ8.0CA-13-F
        Diodes IncorporatedESD Suppressors / TVS Diodes 1500W 8.0V
        RoHS: Compliant
        2652
        • 1:$1.3800
        • 10:$1.1800
        • 100:$0.9040
        • 500:$0.7990
        • 1000:$0.6300
        SMCJ8.0CA-E3/57T
        DISTI # 625-SMCJ8.0CA-E3
        Vishay IntertechnologiesESD Suppressors / TVS Diodes 1500W 8.0V Bidirect
        RoHS: Compliant
        0
        • 1:$0.6900
        • 10:$0.5240
        • 100:$0.3890
        • 500:$0.3200
        SMCJ8.0CAHE3/57T
        DISTI # 625-SMCJ8.0CAHE3
        Vishay IntertechnologiesESD Suppressors / TVS Diodes 1.5KW 8.0V 5% Bidir AEC-Q101 Qualified
        RoHS: Compliant
        0
        • 1:$0.9800
        • 10:$0.8070
        • 100:$0.6190
        • 500:$0.5330
        SMCJ8.0CA-HR
        DISTI # 576-SMCJ8.0CA-HR
        Littelfuse IncESD Suppressors / TVS Diodes 1.5kW 8V Hi Rel 5% Bi-Directional
        RoHS: Compliant
        0
        • 500:$11.5900
        SMCJ8.0CA-HRAT7
        DISTI # 576-SMCJ8.0CA-HRAT7
        Littelfuse IncESD Suppressors / TVS Diodes 1.5kW 8V Hi Rel 5% Bi-Directional
        RoHS: Compliant
        0
        • 500:$10.8700
        SMCJ8.0CAe3/TR13
        DISTI # 494-SMCJ8.0CAE3/TR13
        Microsemi CorporationESD Suppressors / TVS Diodes Transient Voltage Suppressor
        RoHS: Compliant
        0
        • 3000:$0.6390
        • 9000:$0.6150
        SMCJ8.0CA-HRA
        DISTI # 576-SMCJ8.0CA-HRA
        Littelfuse IncESD Suppressors / TVS Diodes 1.5kW 8V Hi Rel 5% Bi-Directional
        RoHS: Compliant
        0
        • 3000:$10.8700
        SMCJ8.0CA-E3/9AT
        DISTI # 625-SMCJ8.0CA-E3/9AT
        Vishay IntertechnologiesESD Suppressors / TVS Diodes 1500W 8.0V Bidirect
        RoHS: Compliant
        0
        • 3500:$0.2420
        SMCJ8.0CA-M3/57T
        DISTI # 78-SMCJ8.0CAM357T
        Vishay IntertechnologiesESD Suppressors / TVS Diodes 1.5KW,8.0V 5%,BIDIR,SMC TVS
        RoHS: Compliant
        0
        • 3400:$0.3920
        • 5100:$0.3730
        • 10200:$0.3590
        SMCJ8.0CAHE3/9AT
        DISTI # 625-SMCJ8.0CAHE3/9AT
        Vishay IntertechnologiesESD Suppressors / TVS Diodes 1.5KW 8.0V 5% Bidir AEC-Q101 Qualified
        RoHS: Compliant
        0
        • 3500:$0.3920
        图片 型号 描述
        SMCJ11A-W

        Mfr.#: SMCJ11A-W

        OMO.#: OMO-SMCJ11A-W

        TVS Diodes / ESD Suppressors SMC 1500w TVS 5%
        SMCJ18AQ-13-F

        Mfr.#: SMCJ18AQ-13-F

        OMO.#: OMO-SMCJ18AQ-13-F

        TVS Diodes / ESD Suppressors Transient Voltage Suppressor
        SMCJ70AHV7G

        Mfr.#: SMCJ70AHV7G

        OMO.#: OMO-SMCJ70AHV7G

        TVS Diodes / ESD Suppressors 1500W, 81.9V 5% Unidirectional, TVS
        SMCJ8.5CA-M3/9AT

        Mfr.#: SMCJ8.5CA-M3/9AT

        OMO.#: OMO-SMCJ8-5CA-M3-9AT

        TVS Diodes / ESD Suppressors 1.5KW,8.5V 5%,BIDIR,SMC TVS
        SMCJ150CAHR7

        Mfr.#: SMCJ150CAHR7

        OMO.#: OMO-SMCJ150CAHR7

        TVS Diodes / ESD Suppressors 1.5KW,150V,5%,BIDIR, TVS
        SMCJ14AHR6G

        Mfr.#: SMCJ14AHR6G

        OMO.#: OMO-SMCJ14AHR6G

        TVS Diodes / ESD Suppressors 1.5KW,14V,5%,UNIDIR, TVS
        SMCJ130CA/7T

        Mfr.#: SMCJ130CA/7T

        OMO.#: OMO-SMCJ130CA-7T-1110

        TVS Diodes - Transient Voltage Suppressors 1500W 130V Bidirect
        SMCJ120CA-E3/9AT

        Mfr.#: SMCJ120CA-E3/9AT

        OMO.#: OMO-SMCJ120CA-E3-9AT-VISHAY

        TVS Diodes - Transient Voltage Suppressors 1500W 120V Bidirect
        SMCJ7.5CA-E3/9AT

        Mfr.#: SMCJ7.5CA-E3/9AT

        OMO.#: OMO-SMCJ7-5CA-E3-9AT-VISHAY

        TVS Diodes - Transient Voltage Suppressors 1500W 7.5V Bidirect
        SMCJ40A (GFR)

        Mfr.#: SMCJ40A (GFR)

        OMO.#: OMO-SMCJ40A-GFR--1190

        全新原装
        可用性
        库存:
        Available
        订购:
        4000
        输入数量:
        SMCJ8.0CA的当前价格仅供参考,如果您想获得最优惠的价格,请提交查询或直接发送电子邮件至我们的销售团队[email protected]
        参考价格(美元)
        数量
        单价
        小计金额
        1
        US$0.18
        US$0.18
        10
        US$0.18
        US$1.75
        100
        US$0.17
        US$16.62
        500
        US$0.16
        US$78.50
        1000
        US$0.15
        US$147.70
        由于2021年半导体供不应求,低于2021年之前的正常价格,请发询价确认。
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