Please enter a valid full or partial manufacturer part number with a minimum of 3 letters or numbers

    DA102 Search Results

    SF Impression Pixel

    DA102 Price and Stock

    C&K DA102J3RS215QF7

    SWITCH ROCKER SPST 16A 125V
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey DA102J3RS215QF7 Tray 10,526 1
    • 1 $2.53
    • 10 $2.183
    • 100 $1.8833
    • 1000 $1.635
    • 10000 $1.635
    Buy Now
    Mouser Electronics DA102J3RS215QF7 59
    • 1 $2.38
    • 10 $1.91
    • 100 $1.77
    • 1000 $1.63
    • 10000 $1.63
    Buy Now
    Newark DA102J3RS215QF7 Bulk 4,842 40
    • 1 -
    • 10 -
    • 100 $2.2
    • 1000 $2.12
    • 10000 $2.12
    Buy Now
    Chip 1 Exchange DA102J3RS215QF7 6,294
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    C&K DA102J12S215DQF

    SWITCH ROCKER SPST 16A 125V
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey DA102J12S215DQF Tray 10,492 1
    • 1 $1.95
    • 10 $1.686
    • 100 $1.4549
    • 1000 $1.25459
    • 10000 $1.25459
    Buy Now
    Mouser Electronics DA102J12S215DQF 1,191
    • 1 $1.36
    • 10 $1.36
    • 100 $1.35
    • 1000 $1.25
    • 10000 $1.25
    Buy Now
    Verical DA102J12S215DQF 4,000 8
    • 1 -
    • 10 $0.4078
    • 100 $0.4076
    • 1000 $0.4067
    • 10000 $0.4067
    Buy Now
    DA102J12S215DQF 3,314 47
    • 1 $1.34
    • 10 $1.34
    • 100 $1.34
    • 1000 $1.24
    • 10000 $1.24
    Buy Now
    DA102J12S215DQF 400 100
    • 1 -
    • 10 -
    • 100 $1.989
    • 1000 $1.781
    • 10000 $1.716
    Buy Now
    Arrow Electronics DA102J12S215DQF 4,000 1
    • 1 $0.4078
    • 10 $0.4078
    • 100 $0.4076
    • 1000 $0.4067
    • 10000 $0.4067
    Buy Now
    Newark DA102J12S215DQF Bulk 3,314 55
    • 1 $1.82
    • 10 $1.82
    • 100 $1.82
    • 1000 $1.82
    • 10000 $1.82
    Buy Now
    Quest Components DA102J12S215DQF 35
    • 1 $1.645
    • 10 $1.316
    • 100 $0.8225
    • 1000 $0.8225
    • 10000 $0.8225
    Buy Now
    TTI DA102J12S215DQF Bulk 900 100
    • 1 -
    • 10 -
    • 100 $1.36
    • 1000 $1.36
    • 10000 $1.36
    Buy Now
    Chip 1 Exchange DA102J12S215DQF 4,308
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    C&K DA102J3GS215QF7

    SWITCH ROCKER SPST 16A 125V
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey DA102J3GS215QF7 Tray 3,722 1
    • 1 $2.92
    • 10 $2.523
    • 100 $2.1765
    • 1000 $1.9125
    • 10000 $1.9125
    Buy Now
    Newark DA102J3GS215QF7 Bulk 2,208 35
    • 1 $2.69
    • 10 $2.69
    • 100 $2.69
    • 1000 $2.69
    • 10000 $2.69
    Buy Now
    Chip 1 Exchange DA102J3GS215QF7 2,870
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    C&K DA102J12S217HQF

    SWITCH ROCKER SPST 16A 125V
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey DA102J12S217HQF Bulk 1,039 1
    • 1 $3.11
    • 10 $2.683
    • 100 $2.3157
    • 1000 $1.99684
    • 10000 $1.99684
    Buy Now
    Mouser Electronics DA102J12S217HQF
    • 1 $3.11
    • 10 $2.43
    • 100 $2.31
    • 1000 $1.99
    • 10000 $1.95
    Get Quote
    Arrow Electronics DA102J12S217HQF 200 9 Weeks 1
    • 1 $3.088
    • 10 $3.088
    • 100 $3.088
    • 1000 $3.088
    • 10000 $3.088
    Buy Now
    Bristol Electronics DA102J12S217HQF 400
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Quest Components DA102J12S217HQF 320
    • 1 $4.056
    • 10 $4.056
    • 100 $2.5012
    • 1000 $2.5012
    • 10000 $2.5012
    Buy Now

    Same Sky PT01-D130D-A102

    POT 1K OHM 1/20W CARBON LOG
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey PT01-D130D-A102 Tray 851 1
    • 1 $1.14
    • 10 $0.917
    • 100 $0.736
    • 1000 $0.58936
    • 10000 $0.50448
    Buy Now

    DA102 Datasheets (42)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    DA102 C&D Technologies Transformers for Digital Audio Data Transmission Original PDF
    DA102 Unknown Semiconductor Master Cross Reference Guide Scan PDF
    DA102 Unknown Discontinued Transistor Data Book 1975 Scan PDF
    DA102 Unknown Basic Transistor and Cross Reference Specification Scan PDF
    DA102 Unknown Shortform Datasheet & Cross References Data Short Form PDF
    DA102C muRata Power Solutions Audio Transformers, Transformers, DIGITAL AUDIO TX 1:1 3MH DIP Original PDF
    DA102J11S115QF C&K Components Rocker Switches, Switches, SWITCH ROCKER SPST 16A 125V Original PDF
    DA102J11S117PQF C&K Components Rocker Switches, Switches, SWITCH ROCKER SPST 16A 125V Original PDF
    DA102J11S215PQF C&K Components Rocker Switch; Circuitry:SPST; Switch Operation:On-None-Off; Contact Current Max:16A; Switch Terminals:Quick Connect; Actuator Color:White; Actuator Markings:O -; Leaded Process Compatible:Yes; Mounting Type:Panel RoHS Compliant: Yes Original PDF
    DA102J11S215QF C&K Components Rocker Switch; Circuitry:SPST; Switch Operation:On-None-Off; Contact Current Max:16A; Switch Terminals:Quick Connect; Actuator Color:White; Leaded Process Compatible:Yes; Mounting Type:Panel RoHS Compliant: Yes Original PDF
    DA102J12B215DQF C&K Components Rocker Original PDF
    DA102J12B215QF C&K Components Rocker Switches, Switches, SWITCH ROCKER SPST 16A 125V Original PDF
    DA102J12G215DQF C&K Components Rocker Switches, Switches, SWITCH ROCKER SPST 16A 125V Original PDF
    DA102J12S215DQF C&K Components Rocker Switch; Circuitry:SPST; Switch Operation:On-None-Off; Contact Current Max:16A; Switch Terminals:Quick Connect; Actuator Color:Black; Actuator Markings:On-Off; Leaded Process Compatible:Yes; Mounting Type:Panel RoHS Compliant: Yes Original PDF
    DA102J12S215HQF C&K Components Rocker Switch; Circuitry:SPST; Switch Operation:On-None-Off; Contact Current Max:16A; Switch Terminals:Quick Connect; Actuator Color:Black; Actuator Markings:O I; Leaded Process Compatible:Yes; Mounting Type:Panel RoHS Compliant: Yes Original PDF
    DA102J12S215PQF C&K Components Rocker Switch; Circuitry:SPST; Switch Operation:On-None-Off; Contact Current Max:16A; Switch Terminals:Quick Connect; Actuator Color:Black; Actuator Markings:O -; Leaded Process Compatible:Yes; Mounting Type:Panel RoHS Compliant: Yes Original PDF
    DA102J12S215QF C&K Components Rocker Switch; Circuitry:SPST; Switch Operation:On-None-Off; Contact Current Max:16A; Switch Terminals:Quick Connect; Actuator Color:Black; Leaded Process Compatible:Yes; Mounting Type:Panel RoHS Compliant: Yes Original PDF
    DA102J12S217HQF C&K Components Rocker Switches, Switches, SWITCH ROCKER SPST 16A 125V Original PDF
    DA102J12S217PQF C&K Components Rocker Switches, Switches, SWITCH ROCKER SPST 16A 125V Original PDF
    DA102J12S217QF C&K Components Rocker Original PDF

    DA102 Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    ncl 039

    Abstract: AN002 CECC00802 DA100 DA101 DA102 DA103 C&D TECHNOLOGIES
    Text: DA100 SERIES Transformers for Digital Audio Data Transmission SELECTION GUIDE Order Code FEATURES • Compatible with Leading Chip Sets mH H Vµs dB dB DA101 1:1 1.00 - 1.59 0.22 15 46.80 52.10 DA102 1:1 2.00 - 3.00 0.39 20 40.40 49.70 DA103 1:1 4.00 - 5.96


    Original
    DA100 DA101 DA102 DA103 DA101M/R DA102M/R DA103M/R CECC00802 ncl 039 AN002 DA101 DA102 DA103 C&D TECHNOLOGIES PDF

    ncl 039

    Abstract: transformers for digital audio data transmission TRANSFORMERS FOR DIGITAL AN002 CECC00802 DA100 DA101 DA102 DA103 da100 audio transformers
    Text: DA100 SERIES Transformers for Digital Audio Data Transmission SELECTION GUIDE Order Code FEATURES • Compatible with Leading Chip Sets mH H Vµs dB dB DA101 1:1 1.00 - 1.59 0.22 15 46.80 52.10 DA102 1:1 2.00 - 3.00 0.39 20 40.40 49.70 DA103 1:1 4.00 - 5.96


    Original
    DA100 DA101 DA102 DA103 DA101M/R DA102M/R DA103M/R CECC00802 ncl 039 transformers for digital audio data transmission TRANSFORMERS FOR DIGITAL AN002 DA101 DA102 DA103 da100 audio transformers PDF

    DA101C

    Abstract: 6 pin audio transformer DA100 Murata DA101c
    Text: DA100 Series Transformers for Digital Audio Data Transmission FEATURES Primary Inductance 10kHz, 50mV Max. Leakage Inductance (100kHz, 10mV) Min. Volt-time Product, Et Min. Return Loss (100kHz-3MHz) Typ. Common Mode Rejection (100kHz, 110Ω) Order Code Turns Ratio


    Original
    DA100 100kHz-3MHz) 100kHz, 10kHz, DA101C DA102C DA103C DA100C DA101C 6 pin audio transformer Murata DA101c PDF

    EMVA630ADA3R3ME55G

    Abstract: EMVA630ADA4R7ME55G emva630ada100mf55g EMVA350ADA100MD55G EMVA6R3ADA330MD55G EMVA250ARA102MKE0S EMVA4R0ADA101ME55G EMVA630ADA220MF80G EMVA4R0ADA221MF55G EMVA4R0ADA330MD55G
    Text: 小型铝电解电容器 ALCHIP 对应表面安装 表面 安装 系列 小型化 小型化・纵型贴片零件 85℃ RoHS指令 适应品 耐清洗 4 〜 63Vdc ●额定电压 4V ~ 450V。 2,000 小时标准品。 ●产品尺寸 :φ4x5.2L ~ φ18×21.5L。


    Original
    63Vdc EMVA630ARA221MKE0S EMVA630ARA331MKG5S EMVA630DA331MLH0S EMVA630DA471MLH0S EMVA630DA471MMH0S EMVA101ADA220MHA0G EMVA101ADA330MJA0G EMVA101ARA680MKE0S EMVA101ARA101MKE0S EMVA630ADA3R3ME55G EMVA630ADA4R7ME55G emva630ada100mf55g EMVA350ADA100MD55G EMVA6R3ADA330MD55G EMVA250ARA102MKE0S EMVA4R0ADA101ME55G EMVA630ADA220MF80G EMVA4R0ADA221MF55G EMVA4R0ADA330MD55G PDF

    EMVE350ADA101MF80G

    Abstract: EMVE500ADA100MF55G EMVE500ADA101MHA0G EMVE100ADA102MJA0G EMVE500ARA331MKE0S EMVE6R3ADA101MF55G EMVE6R3ARA222MKE0S EMVE350ADA331MJA0G EMVE101ARA470MKE0S emve250ada101mf80g
    Text: 表面実装対応 面実装 小形化 ● 定格電圧 6.3V ~ 450V。 105℃ 1,000 ∼ 2,000 時間。 ● 製品サイズφ 4 x 5.2L ∼φ 18 × 21.5L。 小形化・縦形チップ部品(105℃)


    Original
    63Vdc 3450Vdc 120Hz 60450V D55JA0 01CV3A2 03CV4A1 04CV100A1 60250V EMVE350ADA101MF80G EMVE500ADA100MF55G EMVE500ADA101MHA0G EMVE100ADA102MJA0G EMVE500ARA331MKE0S EMVE6R3ADA101MF55G EMVE6R3ARA222MKE0S EMVE350ADA331MJA0G EMVE101ARA470MKE0S emve250ada101mf80g PDF

    JA02

    Abstract: EMVY101ARA680MKE EMVY350ADA100ME55G EMVY630ara221 JA-02 e55 f55 f61
    Text: SURFACE MOUNT ALUMINUM ELECTROLYTIC CAPACITORS Low impedance, 105℃ MZA ●Endurance : 1,000 to 5,000 hours at 105℃ ●Low impedance ●For digital equipment, especially DC-DC converters ●Solvent resistant type except 80 & 100Vdc see PRECAUTIONS AND GUIDELINES


    Original
    100Vdc 63Vdc) 100Vdc) 120Hz) EMVY630ARA680MKE0S EMVY630ARA101MKE0S EMVY630ARA221MKE0S EMVY630DA221MLH0S EMVY630DA331MLH0S JA02 EMVY101ARA680MKE EMVY350ADA100ME55G EMVY630ara221 JA-02 e55 f55 f61 PDF

    relay 12vdc

    Abstract: eagle signal control HD32A622 BR15A601 relay 6vdc 30D3CA12002 BR18A601 30E3CD02402 BR15A6 dynapar ht50 DA211A6
    Text: 2005 Factory Automation & Feedback Controls Price List North America, Latin America & Asia Pacific Effective July 2, 2005 Revised 11/7/2005 Supersedes all previous issues • COUNTERS • TIMERS • PANEL METERS • TACHOMETERS and Other Devices Veeder-Root TM brand


    Original
    ISO9001 Jul/2005 relay 12vdc eagle signal control HD32A622 BR15A601 relay 6vdc 30D3CA12002 BR18A601 30E3CD02402 BR15A6 dynapar ht50 DA211A6 PDF

    Untitled

    Abstract: No abstract text available
    Text: DA Series Miniature Single Pole Rocker Switches Features/Benefits • Nice actuator styling with multiple options • Guards to prevent accidental Typical Applications • Small appliances • Computers and peripherals • Medical instrumentation actuation


    Original
    UL94V-2) 216C00000 PDF

    Untitled

    Abstract: No abstract text available
    Text: DA100ERW Series Low Cost, Miniature 1W SIP, Wide Input DC/DC Converters Electrical Specifications Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice. Input


    Original
    DA100ERW PDF

    1 phase SCR TRIGGER PULSE TRANSFORMER

    Abstract: DA100 DA102 IEC958 74LS 76250EN NME0305D ZN509E gate drive pulse transformer RF transformer turn ratio 12
    Text: TRANSFORMERS Application Notes CONTENTS 1 Impedance matching transformers 2 Selection procedure for matching transformers 3 Selection strategy 4 Transformers for thyristor drives 5 Transformer applications in analogue and digital circuits 6 Digital circuits


    Original
    AN008 1 phase SCR TRIGGER PULSE TRANSFORMER DA100 DA102 IEC958 74LS 76250EN NME0305D ZN509E gate drive pulse transformer RF transformer turn ratio 12 PDF

    47mh smd

    Abstract: inductor 680mH 5100 Power Supply Celestica DA101MC 481R0C SMD 1009C 56100C 47101 1800R 77205c
    Text: Magnetic Products Inductors Pulse Transformers Current Sensing Transformers Databus Isolators Common-Mode Chokes www.murata-ps.com Magnetic Products Two essential elements of the vast majority of power electronics applications are filtering and isolation.


    Original
    d9096 47mh smd inductor 680mH 5100 Power Supply Celestica DA101MC 481R0C SMD 1009C 56100C 47101 1800R 77205c PDF

    stereo 3.5mm jack

    Abstract: TRS jack USB3318 3.5mm Stereo jack pinout 3.5mm Stereo smt jack gpio toslink OPTICAL JACK trs connector audio connector TOTX147PL xs1-l2 TOTX147P
    Text: USB Audio 2.0 Reference Design, XS1-L2 Edition Hardware Manual Version 1.6 Part Number: XR-USB-AUDIO-2.0-MC Board Version: 1V2 Publication Date: 2010/06/29 Copyright 2010 XMOS Ltd. All Rights Reserved. Contents 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17


    Original
    PDF

    da332m

    Abstract: No abstract text available
    Text: SURFACE MOUNT ALUMINUM ELECTROLYTIC CAPACITORS TM AIchip MHB - High heat resistance, 125℃ Upgrade! Series ・ESR : Less than MVH ・Endurance : 1,500 to 3,000 hours at 125℃ ・Rated voltage range : 10 to 100V ・Nominal capacitance range : 47 to 3,300µF


    Original
    100Vdc 120Hz) E1001N da332m PDF

    Untitled

    Abstract: No abstract text available
    Text: SURFACE MOUNT ALUMINUM ELECTROLYTIC CAPACITORS TM AIchip MZA - Low impedance, 105℃ Upgrade! Series MZA ・Endurance : 2,000 to 5,000 hours at 105℃ ・Low impedance ・Solvent resistant type see PRECAUTIONS AND GUIDELINES ・Vibration resistant structure


    Original
    100Vdc 120Hz) E1001N PDF

    Untitled

    Abstract: No abstract text available
    Text: SURFACE MOUNT ALUMINUM ELECTROLYTIC CAPACITORS TM Alchip Standard, 85℃ MVA - Series ・φ4 through φ18 case sizes are fully lined up ・Endurance : 2,000 hours at 85℃ ・Suitable to fit for downsized equipment ・Solvent resistant type except 100 to 450Vdc see PRECAUTIONS AND GUIDELINES


    Original
    450Vdc 120Hz) EMVA201ARA330MKG5S EMVA201â DA470MLH0S DA680MLN0S DA680MMH0S PDF

    Untitled

    Abstract: No abstract text available
    Text: DA Series Miniature Single Pole Rocker Switches Features/Benefits Typical Applications • Small appliances • Nice actuator styling with multiple options • Computers and peripherals • Guards to prevent accidental • Medical instrumentation actuation


    Original
    216C00000 PDF

    0-9v 500ma transformer

    Abstract: EI30 transformer transformer 230v ac SIM300 RoHS BABT CR 0090 230v to 6v step down transformer transformers 321 464 SIM300 step down transformer 6-0-6 200mA Fuse 187mA 250v
    Text: 2541 Technical portal and online community for Design Engineers - www.element-14.com Transformers Audio Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . Auto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clamp Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . .


    Original
    element-14 0-9v 500ma transformer EI30 transformer transformer 230v ac SIM300 RoHS BABT CR 0090 230v to 6v step down transformer transformers 321 464 SIM300 step down transformer 6-0-6 200mA Fuse 187mA 250v PDF

    DA100

    Abstract: DA101C ncl 051
    Text: DA100 Series Transformers for Digital Audio Data Transmission FEATURES n RoHS compliant n Compatible with leading chip sets n 2kVrms isolation n Industry-standard pinout n Surface mount option n UL 94 V-0 package materials n Low profile n Suitable for both 75 & 110Ω circuits


    Original
    DA100 100kHz-3MHz) 100kHz, 10kHz, DA101C DA102C DA100C DA101C ncl 051 PDF

    Untitled

    Abstract: No abstract text available
    Text: DA100 Series www.murata-ps.com Transformers for Digital Audio Data Transmission FEATURES Primary Inductance Max. Leakage Inductance 100kHz, 10mV Min. Volt-time Product, Et Min. Return Loss (100kHz-3MHz) Typ. Common Mode Rejection (100kHz, 110Ω) Order Code


    Original
    DA100 100kHz-3MHz) 100kHz, DA101C DA100C PDF

    digital audio transmission

    Abstract: DA101C da102c DA100
    Text: DA100 Series Transformers for Digital Audio Data Transmission FEATURES Primary Inductance Max. Leakage Inductance 100kHz, 10mV Min. Volt-time Product, Et Min. Return Loss (100kHz-3MHz) Typ. Common Mode Rejection (100kHz, 110Ω) Order Code Turns Ratio SELECTION GUIDE


    Original
    DA100 100kHz-3MHz) 100kHz, DA101C DA102C DA103C DA100C digital audio transmission DA101C da102c PDF

    dale r01f

    Abstract: MK68H MK68590 r01f dale MK68200 Z8000 MOSTEK ROM r01f mostek MK5025 IN914
    Text: MK5025 P R E L IM IN A R Y C O M M U N IC A T IO N S PR O O U C TS FEATURES DAL04 £ £ 3 £ 4 £ S £ Z Data rate up to 7 MBPS with 64 bytes FIFOs in each direction. DAL03 6 C DA102 7 DAL01 1 H Z Complete Date Link Layer Implementation. DALDQ £ £ 11 £


    OCR Scan
    48-pin MK68590) MK5027) MK5025 dale r01f MK68H MK68590 r01f dale MK68200 Z8000 MOSTEK ROM r01f mostek MK5025 IN914 PDF

    motorola bridge rectifier mda

    Abstract: FW-600 FB600 MDA942A-3 10DB2P GENERAL INSTRUMENT MDA942A-2 MDA942A-6 10DB1P MDA942A-1
    Text: R A T IN G S A N D EL E C T R IC A L C H A R A C TE R ISTIC S K BD 005 KBD02 KBD04 KBD06 KBD08 KBD10 M a x R e c u rre n t Peak Reverse V o lta g e 50 200 600 V 35 140 420 800 560 1000 M ax R M S B ridge In p u t V o lta g e M ax D C B lo c k in g V o lta g e


    OCR Scan
    KBD005 KBD02 KBD04 KBD06 KBD08 KBD10 0CI835) 10DB05P 10DB1P motorola bridge rectifier mda FW-600 FB600 MDA942A-3 10DB2P GENERAL INSTRUMENT MDA942A-2 MDA942A-6 MDA942A-1 PDF

    TDA1022

    Abstract: HEF4013 HEF4011 Bucket Brigade hef40118
    Text: DA1022 BUCKET B R IG A D E DELAY LINE FOR A N A L O G U E SIGNALS T h e T D A 10 22 i s a M O S m o n o l i t h i c i n t e g r a t e d c i r c u i t , g e n e r a l l y i n t e n d e d s i g n a l s e . g . d e l a y t i m e = 5 1 2 / 2 £<p. It c a n b e u s e d w i t h c l o c k f r e q u e n c i e s in t h e r a n g e 5 kHz to 500 kHz.


    OCR Scan
    TDA1022 TDA1022 V13-16 HEF4013 HEF4011 Bucket Brigade hef40118 PDF

    B101S

    Abstract: B2510 MVM12 br68 204 RL1N4004 HS607
    Text: ALPHABETICAL INDEX PAGE PA R TS PAGE PA RTS NO. NO. NO. NO. PAGE PA RTS NO. NO. IW. . 102 1N4942G . 192 B R 1010 . 166 06102S . . 102 1N4944 . 80 B R 102 . 166


    OCR Scan
    06102S DB103 B103S B105S B106S EDB101 EDB101S B102S B103S B104S B101S B2510 MVM12 br68 204 RL1N4004 HS607 PDF