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

    KT24 Search Results

    SF Impression Pixel

    KT24 Price and Stock

    TDK Corporation AVRF101U6R8KT242

    FOR AUDIO LINE, 39V, 6.8PF, 28VD
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey AVRF101U6R8KT242 Digi-Reel 11,926 1
    • 1 $0.32
    • 10 $0.188
    • 100 $0.1134
    • 1000 $0.07198
    • 10000 $0.0545
    Buy Now
    AVRF101U6R8KT242 Cut Tape 11,926 1
    • 1 $0.32
    • 10 $0.188
    • 100 $0.1134
    • 1000 $0.07198
    • 10000 $0.0545
    Buy Now
    AVRF101U6R8KT242 Reel 10,000 10,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.04892
    Buy Now
    Mouser Electronics AVRF101U6R8KT242 19,665
    • 1 $0.11
    • 10 $0.098
    • 100 $0.088
    • 1000 $0.051
    • 10000 $0.035
    Buy Now
    Newark AVRF101U6R8KT242 Cut Tape 8,108 10
    • 1 $0.294
    • 10 $0.294
    • 100 $0.101
    • 1000 $0.084
    • 10000 $0.084
    Buy Now
    Avnet Abacus AVRF101U6R8KT242 15 Weeks 20,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    Chip One Stop AVRF101U6R8KT242 Cut Tape 9,056 0 Weeks, 1 Days 50
    • 1 -
    • 10 -
    • 100 $0.0844
    • 1000 $0.0489
    • 10000 $0.0463
    Buy Now
    IBS Electronics AVRF101U6R8KT242 10,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.049476
    Buy Now
    Vyrian AVRF101U6R8KT242 22,991
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    Kyocera AVX Components KAE15AR71H104KT24

    CAP CER 0.1UF 50V X7R 0603
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey KAE15AR71H104KT24 Cut Tape 10,858 1
    • 1 $0.14
    • 10 $0.079
    • 100 $0.14
    • 1000 $0.03224
    • 10000 $0.03224
    Buy Now
    KAE15AR71H104KT24 Digi-Reel 10,858 1
    • 1 $0.14
    • 10 $0.079
    • 100 $0.14
    • 1000 $0.03224
    • 10000 $0.03224
    Buy Now
    KAE15AR71H104KT24 Reel 8,000 4,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.02458
    Buy Now
    Mouser Electronics KAE15AR71H104KT24
    • 1 $0.12
    • 10 $0.07
    • 100 $0.045
    • 1000 $0.031
    • 10000 $0.021
    Get Quote
    TTI KAE15AR71H104KT24 Reel 4,000 4,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.0256
    Buy Now
    TME KAE15AR71H104KT24 4,000 1
    • 1 $0.1272
    • 10 $0.0679
    • 100 $0.0285
    • 1000 $0.0187
    • 10000 $0.0158
    Buy Now

    Standex-Meder Electronics KT24-1A-40L-THT

    REED RELAY 1 FORM A 24V TH
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey KT24-1A-40L-THT Tube 1,702 1
    • 1 $8.47
    • 10 $8.47
    • 100 $6.89583
    • 1000 $6.19053
    • 10000 $5.98212
    Buy Now
    Mouser Electronics KT24-1A-40L-THT 1,184
    • 1 $8.35
    • 10 $7.4
    • 100 $6.72
    • 1000 $5.75
    • 10000 $5.62
    Buy Now
    Verical KT24-1A-40L-THT 6,870 10
    • 1 -
    • 10 $9.6235
    • 100 $8.2471
    • 1000 $6.5294
    • 10000 $6.5294
    Buy Now
    KT24-1A-40L-THT 509 1
    • 1 $7.4322
    • 10 $7.4322
    • 100 $7.4322
    • 1000 $7.4322
    • 10000 $7.4322
    Buy Now
    Arrow Electronics KT24-1A-40L-THT 509 7 Weeks 1
    • 1 $7.6358
    • 10 $7.6358
    • 100 $7.6358
    • 1000 $7.6358
    • 10000 $7.6358
    Buy Now
    Newark KT24-1A-40L-THT Bulk 931 1
    • 1 $10.81
    • 10 $9.46
    • 100 $8.73
    • 1000 $8.6
    • 10000 $8.6
    Buy Now
    Onlinecomponents.com KT24-1A-40L-THT 6,870
    • 1 -
    • 10 $8.18
    • 100 $7.01
    • 1000 $5.55
    • 10000 $5.43
    Buy Now
    Master Electronics KT24-1A-40L-THT 6,870
    • 1 -
    • 10 $8.18
    • 100 $7.01
    • 1000 $5.55
    • 10000 $5.43
    Buy Now
    Vyrian KT24-1A-40L-THT 1,239
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    Standex-Meder Electronics KT24-1A-40L-SMD

    REED RELAY 1 FORM A 24V SMD
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey KT24-1A-40L-SMD Digi-Reel 1,610 1
    • 1 $8.8
    • 10 $7.843
    • 100 $6.9844
    • 1000 $6.9844
    • 10000 $6.9844
    Buy Now
    KT24-1A-40L-SMD Cut Tape 1,610 1
    • 1 $8.8
    • 10 $7.843
    • 100 $6.9844
    • 1000 $6.9844
    • 10000 $6.9844
    Buy Now
    KT24-1A-40L-SMD Reel 1,500 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $6.66904
    • 10000 $6.14866
    Buy Now
    Mouser Electronics KT24-1A-40L-SMD 1,180
    • 1 $8.8
    • 10 $7.85
    • 100 $6.99
    • 1000 $5.33
    • 10000 $5.33
    Buy Now
    Verical KT24-1A-40L-SMD 1,750 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.9705
    • 10000 $2.9404
    Buy Now
    KT24-1A-40L-SMD 1,000 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $6.422
    • 10000 $6.422
    Buy Now
    Arrow Electronics KT24-1A-40L-SMD 1,750 30 Weeks 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $3.0519
    • 10000 $3.021
    Buy Now
    Onlinecomponents.com KT24-1A-40L-SMD 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $4.94
    • 10000 $4.94
    Buy Now
    Master Electronics KT24-1A-40L-SMD 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $4.94
    • 10000 $4.94
    Buy Now
    Vyrian KT24-1A-40L-SMD 908
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    OMRON Industrial Automation S8VK-T24024

    AC/DC DIN RAIL SUPPLY 24V 240W
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey S8VK-T24024 Box 887 1
    • 1 $305.31
    • 10 $268.34
    • 100 $305.31
    • 1000 $305.31
    • 10000 $305.31
    Buy Now
    Newark S8VK-T24024 Bulk 600 1
    • 1 $406.32
    • 10 $365.69
    • 100 $333.61
    • 1000 $333.61
    • 10000 $333.61
    Buy Now

    KT24 Datasheets (3)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    KT24-1A-40L-SMD Standex-Meder Signal Relays, Up to 2 Amps, Relays, REED RELAY 1 FORM A 24V SMD Original PDF
    KT24-1A-40L-THT Standex-Meder Signal Relays, Up to 2 Amps, Relays, REED RELAY 1 FORM A 24V TH Original PDF
    KT24Y Jonard Tools Tools - Accessories - KB24/SW-2426 SET Original PDF

    KT24 Datasheets Context Search

    Catalog Datasheet Type Document Tags PDF

    KT24-1A-40L-THT

    Abstract: No abstract text available
    Text: Europe: +49 / 7731 8399 0 | Email: info@meder.com Item No.: USA: +1 / 508 295 0771 | Email: salesusa@meder.com Asia: +852 / 2955 1682 | Email: salesasia@meder.com 9024185400 Item: KT24-1A-40L-THT Preliminary Datasheet Coil Data at 20 °C Conditions Min Typ


    Original
    KT24-1A-40L-THT KT24-1A-40L-THT PDF

    Untitled

    Abstract: No abstract text available
    Text: Europe: +49 / 7731 8399 0 | Email: info@meder.com Item No.: USA: +1 / 508 295 0771 | Email: salesusa@meder.com Asia: +852 / 2955 1682 | Email: salesasia@meder.com 9024185401 Item: KT24-1A-40L-SMD Preliminary Datasheet Coil Data at 20 °C Conditions Min Typ


    Original
    KT24-1A-40L-SMD PDF

    KT24

    Abstract: KT24-1A-40L-SMD
    Text: Europe: +49 / 7731 8399 0 | Email: info@meder.com Item No.: USA: +1 / 508 295 0771 | Email: salesusa@meder.com Asia: +852 / 2955 1682 | Email: salesasia@meder.com 9024185401 Item: KT24-1A-40L-SMD Preliminary Datasheet Coil Data at 20 °C Conditions Min Typ


    Original
    KT24-1A-40L-SMD KT24 KT24-1A-40L-SMD PDF

    Untitled

    Abstract: No abstract text available
    Text: Europe: +49 / 7731 8399 0 | Email: info@meder.com Item No.: USA: +1 / 508 295 0771 | Email: salesusa@meder.com Asia: +852 / 2955 1682 | Email: salesasia@meder.com 9024185400 Item: KT24-1A-40L-THT Preliminary Datasheet Coil Data at 20 °C Conditions Min Typ


    Original
    KT24-1A-40L-THT PDF

    KT21p

    Abstract: No abstract text available
    Text: * ss & F> « & f'S it£* i» H Ï 5 i» s B “ s i 5 3 BS aS ä » 2 St iS # * £ " S S * S « » s& s 3 3» # * & î3 Í • 5 8 * * ■» e 6 tri £ t? w ^ ><t i 2 ¡S I - g e m m a y- * » ï* » ä■* 3t * -ii t& & 9 p r> & ■* r? IK r Í» * at a i*


    OCR Scan
    KT21H-tà KT21P PDF

    BS 4752

    Abstract: IEC-157-1 BS 4752 circuit breakers HKD3400F KD210 KT3400T SWITCHGEAR 4752 K0335 KD3400F KT3250T
    Text: Cutler-Hammer Molded Case Circuit Breakers 70 - 400 Amperes January 2001 12-41 Vol. 1, Ref. No. [0507] K-Frame Product Selection Table 12-70. Types KD, HKD and KDC Thermal-Magnetic Circuit Breakers with Interchangeable Trip Units Maximum Continuous Ampere


    Original
    PDF

    E142 wafer format

    Abstract: HEL32 MR 4710 IC 300w power amplifier circuit diagram HEL05 klt22 HEL12 HEL31 HEL16 HLT22 HLT28
    Text: DL140/D Rev. 6, Jan-2001 High Performance ECL Data ECLinPS and ECLinPS Lite™ High Performance ECL Device Data ECLinPS, ECLinPS Lite, and Low Voltage ECLinPS DL140/D Rev. 6, Jan–2001  SCILLC, 2001 Previous Edition  2000 “All Rights Reserved”


    Original
    DL140/D Jan-2001 r14525 E142 wafer format HEL32 MR 4710 IC 300w power amplifier circuit diagram HEL05 klt22 HEL12 HEL31 HEL16 HLT22 HLT28 PDF

    TT2W48MCN1

    Abstract: Amphenol blue ribbon TT2W48MCF1
    Text: TT-JAX .173" CONNECTORIZED JACKFIELDS SERIES TT, 2-WIRE, 4-WIRE, 6-WIRE 2-WIRE TT-CONNECTORIZED JACKFIELDS, SERIES TT Contains 48, 2-wire circuits. Arrangements include: LINE-DROP or Signal E/M, or LINE-DROP-MON. Available with MONITOR jack row. On rear panel, LINE connectors are


    OCR Scan
    PDF

    LD3600

    Abstract: Eaton rgc320032e HFD3225 Eaton WESTINGHOUSE scr LS CIRCUIT BREAKERS ld2500 Cutler-Hammer Digitrip RMS 310 trip unit digitrip 310 time curve Digitrip OPTIM 1050 HMCP030H1
    Text: Molded Case Circuit Breakers Series G Circuit Breakers 2.1 Introduction Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


    Original
    V4-T2-434 CA08100005Eâ V4-T2-407 V4-T2-408 V4-T2-413 V4-T2-415 V4-T2-421 V4-T2-425 V4-T2-429 V4-T2-431 LD3600 Eaton rgc320032e HFD3225 Eaton WESTINGHOUSE scr LS CIRCUIT BREAKERS ld2500 Cutler-Hammer Digitrip RMS 310 trip unit digitrip 310 time curve Digitrip OPTIM 1050 HMCP030H1 PDF

    N5 MARKING FET

    Abstract: A115-A C101 SN74CBTK32245 SN74CBTK32245GKER
    Text: SN74CBTK32245 32-BIT FET BUS SWITCH WITH ACTIVE-CLAMP UNDERSHOOT-PROTECTION CIRCUIT SCDS106D – APRIL 2000 – REVISED MARCH 2001 D D D D D D Member of Texas Instruments’ Widebus+ Family 5-Ω Switch Connection Between Two Ports TTL-Compatible Input Levels


    Original
    SN74CBTK32245 32-BIT SCDS106D 000-V A114-A) A115-A) SN74CBTK32245 N5 MARKING FET A115-A C101 SN74CBTK32245GKER PDF

    HLT24

    Abstract: MC100ELT24DG ELT24 HT24 KLT24 MC100ELT24 MC10ELT24 MC100ELT24DR2G
    Text: MC10ELT24, MC100ELT24 5V TTL to Differential ECL Translator Description http://onsemi.com MARKING DIAGRAMS* 8 8 Features • • • • • 0.8 ns tPHL, 0.95 ns tPLH Typical Propagation Delay PNP TTL Inputs for Minimal Loading Flow Through Pinouts Operating Range: VCC = 4.5 V to 5.5 V; VEE = −4.2 V to −5.5 V with


    Original
    MC10ELT24, MC100ELT24 HLT24 KLT24 506AA MC100 MC10ELT/100ELT24 MC10ELT24/D HLT24 MC100ELT24DG ELT24 HT24 KLT24 MC100ELT24 MC10ELT24 MC100ELT24DR2G PDF

    KLT20

    Abstract: k1648 klt22 KEL32 MC100 HEP64 KLT21 LP17 KEP32 HEP139
    Text: AND8002/D ECLinPS, ECLinPS Lite, ECLinPS Plus, ECLinPS MAX, and GigaComm Marking and Ordering Information Guide http://onsemi.com APPLICATION NOTE Prepared by: Paul Shockman ON Semiconductor HFPD Applications Engineer Introduction This application note describes the device markings and


    Original
    AND8002/D KLT20 k1648 klt22 KEL32 MC100 HEP64 KLT21 LP17 KEP32 HEP139 PDF

    kvt22

    Abstract: KVL11 KPT23 ON Semiconductor marking k1648 KLT20 HEL16 KEL32 KEL01 xaa9646
    Text: AND8002/D ECLinPS, ECLinPS Lite and ECLinPS Plus Device Type and Date Code Marking Guide Gary Richards, ECL Logic Product Engineering http://onsemi.com APPLICATION NOTE need ON Semiconductor’s marking spec 12MON00232D and S.O.P. 7–19 ID of Products to Location of


    Original
    AND8002/D 12MON00232D r14525 kvt22 KVL11 KPT23 ON Semiconductor marking k1648 KLT20 HEL16 KEL32 KEL01 xaa9646 PDF

    transistor 3b6

    Abstract: No abstract text available
    Text: SN74CBTK32245 32-BIT FET BUS SWITCH WITH ACTIVE-CLAMP UNDERSHOOT-PROTECTION CIRCUIT SCDS106C – APRIL 2000 – REVISED OCTOBER 2000 D D D D D D Member of Texas Instruments’ Widebus+ Family 5-Ω Switch Connection Between Two Ports TTL-Compatible Input Levels


    Original
    SN74CBTK32245 32-BIT SCDS106C 000-V A114-A) A115-A) SN74CBTK32245 transistor 3b6 PDF

    Digitrip optim 550

    Abstract: DK3400W KD3400F CHKD3400F V4-T2-191 Digitrip OPTIM 1050
    Text: 2.3 2 Molded Case Circuit Breakers Series C Typical K-Frame Circuit Breaker Contents Description 2 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . Standards and Certifications . . . . . . . . . . . . . . . . . Quick Reference. . . . . . . . . . . . . . . . . . . . . . . . . . .


    Original
    V4-T2-194 CA08100005Eâ Digitrip optim 550 DK3400W KD3400F CHKD3400F V4-T2-191 Digitrip OPTIM 1050 PDF

    Texas Instruments TTL

    Abstract: ALVC16425 CD4066B spice model LVT - Low-Voltage BiCMOS Technology working principle of ic cd4066 CD4054B SCHEMATIC AND PIN DETAILS TI audio squelch can CU384A CD4053 spice MARKING CODE N-CHANNEL MOS FIELD EFFECT TRANSISTOR
    Text: Signal Switch Including Digital/Analog/Bilateral Switches and Voltage Clamps Data Book Introducing Three New Bus-Switch Families S CB3Q High-Bandwidth Bus Switch S CB3T Low-Voltage Translator Bus Switch S CBT- C Bus Switch With –2-V Undershoot Protection


    Original
    CD4000 R-PBGA-N20) 4204492/A MO-225 Texas Instruments TTL ALVC16425 CD4066B spice model LVT - Low-Voltage BiCMOS Technology working principle of ic cd4066 CD4054B SCHEMATIC AND PIN DETAILS TI audio squelch can CU384A CD4053 spice MARKING CODE N-CHANNEL MOS FIELD EFFECT TRANSISTOR PDF

    nsk XTAL osc

    Abstract: operation of DAC 0808 interfacing with 8051 AL2002 adc 0809 interfacing with 8051 microcontroller NSK osc XTAL NSK OSC SLD 0818 8 PIN IC nsk Crystal osc KT 0803 K DAC ic 0808 pin diagram
    Text: DATA SHEET KS9250 INTRODUCTION The CD-ROM 48X 1 chip receives the input signal read from the CD-DA/VIDEO-CD/CD-ROM disc after handling by the RF amplifier. The signal is input into the digital servo block which has a built-in DSP core, and goes through focus and tracking adjustments. The RF signal input into a data path goes through the data slicer, PLL,


    Original
    KS9250 KS9250 BI9250X nsk XTAL osc operation of DAC 0808 interfacing with 8051 AL2002 adc 0809 interfacing with 8051 microcontroller NSK osc XTAL NSK OSC SLD 0818 8 PIN IC nsk Crystal osc KT 0803 K DAC ic 0808 pin diagram PDF

    HLT24

    Abstract: KLT24
    Text: MC10ELT24, MC100ELT24 5V TTL to Differential ECL Translator The MC10ELT/100ELT24 is a TTL to differential ECL translator. Because ECL levels are used a +5 V, −5.2 V or −4.5 V and ground are required. The small outline 8−lead package and the single gate of


    Original
    MC10ELT24, MC100ELT24 MC10ELT/100ELT24 ELT24 HLT24 KLT24 MC10ELT24/D PDF

    Untitled

    Abstract: No abstract text available
    Text: SN74CBTK32245 32ĆBIT FET BUS SWITCH WITH ACTIVEĆCLAMP UNDERSHOOTĆPROTECTION CIRCUIT SCDS106E − APRIL 2000 − REVISED SEPTEMBER 2003 D Member of the Texas Instruments D D D D D Flow-Through Architecture Optimizes PCB Widebus+ Family 5-Ω Switch Connection Between Two Ports


    Original
    SN74CBTK32245 32BIT SCDS106E 000-V A114-A) A115-A) PDF

    GR500

    Abstract: T210 dipped tantalum capacitor markings
    Text: F-3113 5/06 TANTALUM HIGH RELIABILITY CAPACITORS Tantalum High Reliability Capacitors Performance Information GR500 Series 1 T210 T210 Performance Information GR500 Series 2-4 5-8 T240 9-10 T240 Performance Information 11-13 Detailed Reliability Information


    Original
    F-3113 GR500 GR500 T210 dipped tantalum capacitor markings PDF

    PT76S16

    Abstract: d2n203le 10ERB20 508RP FCHS20A 300MCB
    Text: Power Semiconductors Catalog Nihon Inter Electronics Corporation 安全設計に関するお願い ●当社は常に製品の品質信頼性の維持向上に努めておりますが、一般に半導体製品では故障がある確率で起こることは避けられ


    Original
    PDF

    DAC ic 0808 pin diagram

    Abstract: nsk XTAL osc operation of DAC 0808 interfacing with 8051 adc 0809 interfacing with 8051 microcontroller STRD 1806 sony kv21 oscillator nsk p120 2d motor dac 0808 interfacing with 8051 microcontroller NSK osc
    Text: DATA SHEET S5L9250B INTRODUCTION The CD-ROM 48X 1 chip receives the input signal read from the CD-DA/VIDEO-CD/CD-ROM disc after handling by the RF amplifier. The signal is input into the digital servo block which has a built-in DSP core, and goes through focus and tracking adjustments. The RF signal input into a data path goes through the data slicer, PLL,


    Original
    S5L9250B S5L9250B BI9250X DAC ic 0808 pin diagram nsk XTAL osc operation of DAC 0808 interfacing with 8051 adc 0809 interfacing with 8051 microcontroller STRD 1806 sony kv21 oscillator nsk p120 2d motor dac 0808 interfacing with 8051 microcontroller NSK osc PDF

    2SA475

    Abstract: tk24b OC75N 2SA370 2V631 PNP ASY32 0c307 2G109 A1383 Audio Power Amplifier MOSFET TOSHIBA
    Text: SYMBOLS & CODES EXPLAINED IN T Y P E No. CROSS-INDEX & TE C H N IC A L SECTIONS A \ Indicators of separate manufacturers producing same type number non-JEDEC whose characteristics are not the same. This manufacturer-identifying symbol (assigned by D .A .T.A .) is an integral part of the type number (in Type No. Cross Index,


    OCR Scan
    2N781t 2N1646 2N1853/18 2N1960t 2N1960/46T 2N1961t 200rn 1961/46t 2N2022 2SA475 tk24b OC75N 2SA370 2V631 PNP ASY32 0c307 2G109 A1383 Audio Power Amplifier MOSFET TOSHIBA PDF

    TOP-SIDE MARKING H2

    Abstract: A115-A C101 SN74CBTK32245 SN74CBTK32245GKER SN74CBTK32245ZKER KT245 marking 4A8 transistor 3b8
    Text: SN74CBTK32245 32ĆBIT FET BUS SWITCH WITH ACTIVEĆCLAMP UNDERSHOOTĆPROTECTION CIRCUIT SCDS106E − APRIL 2000 − REVISED SEPTEMBER 2003 D Member of the Texas Instruments D D D D D Flow-Through Architecture Optimizes PCB Widebus+ Family 5-Ω Switch Connection Between Two Ports


    Original
    SN74CBTK32245 32BIT SCDS106E 000-V A114-A) A115-A) SN74CBTK32245 TOP-SIDE MARKING H2 A115-A C101 SN74CBTK32245GKER SN74CBTK32245ZKER KT245 marking 4A8 transistor 3b8 PDF