Call us: +86 0755-82563503

Currency: $ US Dollar

Items : %s%s

Arrays BJT Transistors

Compare Image Name Manufacturer Pricing(USD) Quantity Weight(Kg) Size(LxWxH) Datasheet Factory Lead Time Lifecycle Status Mount Packaging Published Series Pbfree Code Part Status Moisture Sensitivity Level (MSL) Number of Terminations ECCN Code Max Operating Temperature Min Operating Temperature Length RoHS Status Lead Free Contact Plating Current Rating Radiation Hardening Number of Pins Additional Feature Package / Case REACH SVHC Reach Compliance Code Number of Drivers Frequency Height Width Thickness Mounting Type Weight Operating Temperature Voltage - Rated DC HTS Code Max Frequency Type JESD-609 Code Terminal Finish Terminal Position Terminal Form Peak Reflow Temperature (Cel) Time@Peak Reflow Temperature-Max (s) Base Part Number Pin Count Surface Mount JESD-30 Code Operating Temperature (Max) Subcategory Qualification Status Max Power Dissipation Power - Max Reference Standard Output Voltage Number of Elements Configuration JEDEC-95 Code Output Current Polarity Case Connection Halogen Free Gain Bandwidth Product Polarity/Channel Type Power Dissipation-Max (Abs) Collector Current-Max (IC) DC Current Gain-Min (hFE) Element Configuration Power Dissipation Max Breakdown Voltage Supplier Device Package Max Collector Current Collector Emitter Breakdown Voltage Collector Emitter Voltage (VCEO) Max Junction Temperature (Tj) Transistor Application Transistor Element Material Transistor Type Highest Frequency Band Turn On Time-Max (ton) Transition Frequency Turn Off Time-Max (toff) Current - Collector Cutoff (Max) Collector Emitter Saturation Voltage VCEsat-Max Voltage - Collector Emitter Breakdown (Max) Current - Collector (Ic) (Max) Continuous Collector Current Collector Base Voltage (VCBO) Emitter Base Voltage (VEBO) hFE Min DC Current Gain (hFE) (Min) @ Ic, Vce Vce Saturation (Max) @ Ib, Ic Frequency - Transition
CMKT2222A TR CMKT2222A TR Central Semiconductor Corp 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 RoHS Compliant compliant YES 150°C Other Transistors NPN 0.35W 0.6A 100 300MHz
BCM847BS,115 BCM847BS,115 Nexperia USA Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Tape & Reel (TR) 2008 Active 1 (Unlimited) 6 EAR99 ROHS3 Compliant 6 6-TSSOP, SC-88, SOT-363 Surface Mount 150°C TJ 8541.21.00.75 e3 Tin (Sn) GULL WING 260 30 BCM847 6 YES 2 SEPARATE, 2 ELEMENTS NPN ISOLATED 300mW AMPLIFIER SILICON 2 NPN (Dual) Matched Pair 250MHz 15nA ICBO 45V 100mA 200 @ 2mA 5V 400mV @ 5mA, 100mA 250MHz
ULN2802A ULN2802A STMicroelectronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 15 Weeks Through Hole Tube Active 1 (Unlimited) 18 EAR99 23.24mm ROHS3 Compliant Lead Free 500mA No 18 18-DIP (0.300, 7.62mm) No SVHC 3.68mm 7.1mm Through Hole 1.270087g -20°C~150°C TJ 50V e3 Tin (Sn) DUAL ULN2802 18 2.25W 50V 8 COMPLEX 500mA NPN 500mA 50V 50V SILICON 8 NPN Darlington 1.1V 1.6 V 500mA 1000 @ 350mA 2V 1.6V @ 500μA, 350mA
EMX1DXV6T1 EMX1DXV6T1 Rochester Electronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) yes Obsolete 1 (Unlimited) 6 ROHS3 Compliant SOT-563, SOT-666 Surface Mount -55°C~150°C TJ e3 MATTE TIN FLAT 260 40 6 YES R-PDSO-F6 COMMERCIAL 500mW 2 SEPARATE, 2 ELEMENTS NPN AMPLIFIER SILICON 2 NPN (Dual) 180MHz 500nA ICBO 50V 100mA 120 @ 1mA 6V 400mV @ 5mA, 50mA 180MHz
ULN2003AIPWRG4 ULN2003AIPWRG4 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 5 days ago) Surface Mount Tape & Reel (TR) Automotive, AEC-Q100 yes Active 1 (Unlimited) 16 EAR99 5mm ROHS3 Compliant Lead Free No 16 LOGIC LEVEL COMPATIBLE 16-TSSOP (0.173, 4.40mm Width) 7 1.2mm 4.4mm 1mm Surface Mount 61.887009mg -40°C~105°C TA 8542.39.00.01 e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 ULN2003 16 7 COMPLEX MO-153AB NPN 500mA 50V SWITCHING SILICON 7 NPN Darlington 50μA 1.1V 500mA 1.6V @ 500μA, 350mA
FFB3904 FFB3904 ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download LAST SHIPMENTS (Last Updated: 2 days ago) Surface Mount Tape & Reel (TR) 2000 yes Obsolete 1 (Unlimited) 6 EAR99 2mm RoHS Compliant Lead Free 200mA No 6 6-TSSOP, SC-88, SOT-363 No SVHC 250MHz 1.1mm 1.25mm Surface Mount 28mg -55°C~150°C TJ 40V e3 Tin (Sn) GULL WING FFB3904 Other Transistors 300mW 2 NPN 250MHz Dual 300mW 40V 200mA 40V 40V 150°C SWITCHING SILICON 2 NPN (Dual) 38ns 250MHz 175ns 300mV 60V 6V 100 100 @ 10mA 1V 300mV @ 5mA, 50mA
PEMZ1,115 PEMZ1,115 Nexperia USA Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Surface Mount Tape & Reel (TR) 2001 Active 1 (Unlimited) 6 EAR99 6.35mm ROHS3 Compliant Lead Free No 6 SOT-563, SOT-666 No SVHC 100MHz 6.35mm 6.35mm Surface Mount 4.535924g 150°C TJ e3 Tin (Sn) FLAT P*MZ1 6 200mW 300mW 2 NPN, PNP 100MHz Dual 200mW 100mA 40V 40V SWITCHING SILICON NPN, PNP 100MHz 100nA ICBO 50V 5V 120 120 @ 1mA 6V 200mV @ 5mA, 50mA
HN2A01FE-Y(TE85L,F HN2A01FE-Y(TE85L,F Toshiba Semiconductor and Storage 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Tape & Reel (TR) 2014 Obsolete 1 (Unlimited) SOT-563, SOT-666 Surface Mount 150°C TJ 100mW ES6 2 PNP (Dual) 100nA ICBO 50V 150mA 120 @ 2mA 6V 300mV @ 10mA, 100mA 80MHz
SMBT3904UPNE6327HTSA1 SMBT3904UPNE6327HTSA1 Infineon Technologies 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Surface Mount Tape & Reel (TR) 2012 Last Time Buy 1 (Unlimited) 6 EAR99 ROHS3 Compliant Lead Free 200mA 6 SC-74, SOT-457 Surface Mount 150°C TJ 40V e3 Tin (Sn) DUAL GULL WING NOT SPECIFIED NOT SPECIFIED 330mW AEC-Q101 2 SEPARATE, 2 ELEMENTS NPN, PNP Not Halogen Free 200mA 40V 40V SWITCHING SILICON NPN, PNP 70ns 250MHz 300ns 50nA ICBO 100 @ 10mA 1V 400mV @ 5mA, 50mA 250MHz
BC817DSF BC817DSF Nexperia USA Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Surface Mount Tape & Reel (TR) 2004 Automotive, AEC-Q101 Active 1 (Unlimited) 6 ROHS3 Compliant Tin SC-74, SOT-457 Surface Mount 150°C TJ GULL WING NOT SPECIFIED NOT SPECIFIED BC817DS 6 R-PDSO-G6 370mW 370mW 2 SEPARATE, 2 ELEMENTS NPN 500mA 45V 700mV SWITCHING SILICON 2 NPN (Dual) 100MHz 100nA ICBO 50V 5V 160 @ 100mA 1V 700mV @ 50mA, 500mA 100MHz
JANSR2N2920U JANSR2N2920U Microsemi 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 8 Weeks Tray Military, MIL-PRF-19500/355 Active Non-RoHS Compliant 6-SMD, No Lead Surface Mount -65°C~200°C TJ 350mW 6-SMD 2 NPN (Dual) 10μA ICBO 60V 30mA 300 @ 1mA 5V 300mV @ 100μA, 1mA
MMDT3904Q-7-F MMDT3904Q-7-F Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 13 Weeks Tape & Reel (TR) Automotive, AEC-Q101 Active 1 (Unlimited) 6 ROHS3 Compliant HIGH RELIABILITY 6-TSSOP, SC-88, SOT-363 Surface Mount -55°C~150°C TJ e3 Matte Tin (Sn) GULL WING 260 30 YES R-PDSO-G6 200mW 2 SEPARATE, 2 ELEMENTS NPN SWITCHING SILICON 2 NPN (Dual) 70ns 300MHz 250ns 50nA 40V 200mA 100 @ 10mA 1V 300mV @ 5mA, 50mA 300MHz
ULN2003V12DR ULN2003V12DR 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 5 days ago) Surface Mount Tape & Reel (TR) yes Active 1 (Unlimited) EAR99 9.9mm ROHS3 Compliant Lead Free No 16 16-SOIC (0.154, 3.90mm Width) No SVHC 7 1.75mm 3.91mm 1.58mm Surface Mount 141.690917mg -40°C~125°C TJ 8541.29.00.95 e3 Matte Tin (Sn) DUAL GULL WING 260 ULN2003 860mW 16V 140mA 860mW 140mA 20V 7 NPN Darlington 50μA 750mV 50V 500mA 1.6V @ 500μA, 350mA
SMBT3906SH6327XTSA1 SMBT3906SH6327XTSA1 Infineon Technologies 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Surface Mount Tape & Reel (TR) 2008 Last Time Buy 1 (Unlimited) 6 EAR99 ROHS3 Compliant Lead Free 6 6-VSSOP, SC-88, SOT-363 250MHz Surface Mount 150°C TJ e3 Tin (Sn) GULL WING NOT SPECIFIED NOT SPECIFIED 330mW AEC-Q101 2 PNP Halogen Free 330mW 200mA 40V 40V SWITCHING SILICON 2 PNP (Dual) 70ns 250MHz 300ns 50nA ICBO 200mA 40V 6V 100 @ 10mA 1V 400mV @ 5mA, 50mA
JANTX2N6987 JANTX2N6987 Microsemi 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 23 Weeks IN PRODUCTION (Last Updated: 3 weeks ago) Through Hole Bulk 2002 Military, MIL-PRF-19500/558 no Active 1 (Unlimited) 14 EAR99 Non-RoHS Compliant Contains Lead Lead, Tin 14 14-DIP (0.300, 7.62mm) not_compliant Through Hole -65°C~200°C TJ e0 Tin/Lead (Sn/Pb) DUAL NOT SPECIFIED NOT SPECIFIED 14 Other Transistors Qualified 1.5W MIL-19500/558D 4 TO-116 PNP 1.5W 600mA 60V 60V SWITCHING SILICON 4 PNP (Quad) 10μA ICBO 60V 5V 100 @ 150mA 10V 1.6V @ 50mA, 500mA
BCM846BS-7 BCM846BS-7 Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 15 Weeks Tape & Reel (TR) Automotive, AEC-Q101 Active 1 (Unlimited) ROHS3 Compliant 6-TSSOP, SC-88, SOT-363 Surface Mount -65°C~150°C TJ e3 Matte Tin (Sn) 260 30 200mW 2 NPN (Dual) Matched Pair 15nA ICBO 65V 100mA 200 @ 2mA 5V 400mV @ 5mA, 100mA 100MHz
CMLT2222AG TR CMLT2222AG TR Central Semiconductor Corp 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 RoHS Compliant compliant YES 150°C Other Transistors NPN 0.35W 0.6A 100 300MHz
ULN2003AIPW ULN2003AIPW 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 6 Weeks ACTIVE (Last Updated: 3 days ago) Surface Mount Tube Automotive, AEC-Q100 yes Active 1 (Unlimited) 16 EAR99 5mm ROHS3 Compliant Lead Free No 16 LOGIC LEVEL COMPATIBLE 16-TSSOP (0.173, 4.40mm Width) No SVHC 1.2mm 4.4mm 1mm Surface Mount 61.887009mg -40°C~105°C TA e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 ULN2003 16 7 COMPLEX MO-153AB NPN 500mA 50V 50V SWITCHING SILICON 7 NPN Darlington 50μA 1.1V 1.6V @ 500μA, 350mA
ULN2003AIDG4 ULN2003AIDG4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 5 days ago) Surface Mount Tube Automotive, AEC-Q100 yes Active 1 (Unlimited) 16 EAR99 9.9mm ROHS3 Compliant Lead Free No 16 LOGIC LEVEL COMPATIBLE 16-SOIC (0.154, 3.90mm Width) No SVHC 1.75mm 3.91mm 1.58mm Surface Mount 141.690917mg -40°C~105°C TA e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 ULN2003 16 7 COMPLEX MS-012AC NPN 500mA 50V 50V SWITCHING SILICON 7 NPN Darlington 50μA 1.1V 1.6V @ 500μA, 350mA
EMY1T2R EMY1T2R ROHM Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 13 Weeks Surface Mount Tape & Reel (TR) 2004 yes Active 1 (Unlimited) 5 EAR99 ROHS3 Compliant Lead Free 150mA No 6 6-SMD (5 Leads), Flat Lead Surface Mount 150°C TJ 60V 8541.21.00.75 e2 Tin/Copper (Sn/Cu) 260 10 *MY1 5 R-PDSO-F5 BIP General Purpose Small Signal 150mW 2 NPN, PNP 180MHz Dual 50V 150mA 50V 50V SILICON NPN, PNP (Emitter Coupled) 180MHz 100nA ICBO 60V 6V 120 120 @ 1mA 6V 400mV @ 5mA, 50mA / 500mV @ 5mA, 50mA 180MHz 140MHz
SMA4021 SMA4021 Sanken 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Through Hole Tube 2001 yes Active 1 (Unlimited) 12 EAR99 RoHS Compliant Lead Free BUILT IN BIAS RESISTANCE RATIO IS 0.075 12-SIP unknown Through Hole 150°C TJ 8541.29.00.95 SINGLE NOT SPECIFIED NOT SPECIFIED 12 R-PSIP-T12 Not Qualified 4W 4W 4 COMPLEX PNP 3A 60V 1.5V SILICON 4 PNP Darlington (Quad) 10μA ICBO 2000 @ 2A 4V 1.5V @ 4mA, 2A
CA3083M96 CA3083M96 Rochester Electronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) no Obsolete 1 (Unlimited) 16 EAR99 Non-RoHS Compliant 16-SOIC (0.154, 3.90mm Width) Surface Mount 150°C TJ 8541.21.00.75 e0 TIN LEAD DUAL GULL WING 240 NOT SPECIFIED 16 YES R-PDSO-G16 Not Qualified 500mW 5 SEPARATE, 5 ELEMENTS MS-012AC NPN SWITCHING SILICON 5 NPN VERY HIGH FREQUENCY B 450MHz 10μA 15V 100mA 40 @ 50mA 3V 700mV @ 5mA, 50mA 450MHz
FMB2907A FMB2907A ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 5 Weeks ACTIVE (Last Updated: 5 days ago) Surface Mount Tape & Reel (TR) yes Active 1 (Unlimited) 6 EAR99 ROHS3 Compliant Lead Free -600mA No 6 SOT-23-6 Thin, TSOT-23-6 250MHz Surface Mount 36mg -55°C~150°C TJ -60V e3 Tin (Sn) GULL WING FMB2907 Other Transistors 700mW 2 PNP 250MHz Dual 700mW 60V 600mA 60V 60V SWITCHING SILICON 2 PNP (Dual) 30ns 250MHz 80ns 20nA ICBO 1.6V -60V -5V 100 100 @ 150mA 10V 1.6V @ 50mA, 500mA
XP0250100L XP0250100L Panasonic Electronic Components 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Surface Mount Tape & Reel (TR) 2003 Obsolete 1 (Unlimited) 150°C -55°C RoHS Compliant Lead Free 100mA No 5 5-TSSOP, SC-70-5, SOT-353 Surface Mount 150°C TJ 50V 150mW 150mW 50V SMini5-G1 100mA 50V 300mV 2 NPN (Dual) 100μA 50V 100mA 60V 160 @ 2mA 10V 300mV @ 10mA, 100mA 150MHz
ZXTD6717E6TC ZXTD6717E6TC Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) Obsolete 1 (Unlimited) 6 EAR99 RoHS Compliant SOT-23-6 compliant Surface Mount -55°C~150°C TJ e3 MATTE TIN DUAL GULL WING 260 40 ZXTD6717 6 YES R-PDSO-G6 BIP General Purpose Small Signal Not Qualified 1.1W 2 SEPARATE, 2 ELEMENTS NPN AND PNP 1.1W SWITCHING SILICON NPN, PNP 180MHz 10nA 15V 12V 1.5A 1.25A 250 @ 500mA 2V / 200 @ 500mA 2V 245mV @ 20mA, 1.5A / 240mV @ 100mA, 1.25A 180MHz 220MHz
ULN2803AN ULN2803AN Rochester Electronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube Obsolete 1 (Unlimited) ROHS3 Compliant 18-DIP (0.300, 7.62mm) Through Hole -40°C~85°C TA 18-PDIP 8 NPN Darlington 50V 500mA 1.6V @ 500μA, 350mA
SLA4030 SLA4030 Sanken 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Through Hole Tube 2001 yes Active 1 (Unlimited) 12 EAR99 RoHS Compliant BUILT IN BIAS RESISTANCE RATIO IS 0.167 12-SIP Through Hole 150°C TJ 8541.29.00.95 SINGLE NOT SPECIFIED NOT SPECIFIED 12 R-PSFM-T12 Other Transistors Not Qualified 5W 5W 4 4 BANKS, DARLINGTON WITH BUILT-IN DIODE AND RESISTOR NPN 4A 100V 1.5V SILICON 4 NPN Darlington (Quad) 10μA ICBO 2000 @ 2A 4V 1.5V @ 10mA, 2A
DMMT3906W-7-F DMMT3906W-7-F Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 19 Weeks Surface Mount Tape & Reel (TR) 2007 yes Active 1 (Unlimited) 6 EAR99 2.2mm ROHS3 Compliant Lead Free -200mA No 6 HIGH RELIABILITY 6-TSSOP, SC-88, SOT-363 No SVHC 250MHz 1.1mm 1.35mm Surface Mount 6.010099mg -65°C~150°C TJ -40V e3 Matte Tin (Sn) GULL WING 260 40 DMMT3906 6 Other Transistors 200mW 2 PNP 250MHz Dual 200mW 40V -200mA -40V -40V 150°C SILICON 2 PNP (Dual) Matched Pair 70ns 250MHz 300ns -400mV 200mA -200mA -40V -5V 100 100 @ 10mA 1V 400mV @ 5mA, 50mA
UMX1NTN UMX1NTN ROHM Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 13 Weeks Surface Mount Tape & Reel (TR) 2003 yes Active 1 (Unlimited) 6 EAR99 2mm ROHS3 Compliant Lead Free 150mA No 6 6-TSSOP, SC-88, SOT-363 No SVHC 900μm 1.25mm Surface Mount 150°C TJ 50V 8541.21.00.75 100MHz General Purpose e2 Tin/Copper (Sn/Cu) GULL WING 260 10 *MX1 6 Other Transistors 150mW 2 NPN 180MHz Dual 150mW 50V 150mA 50V 50V AMPLIFIER SILICON 2 NPN (Dual) 180MHz 100nA ICBO 400mV 0.4 V 150mA 60V 7V 120 120 @ 1mA 6V 400mV @ 5mA, 50mA
PBSS4350SPN,115 PBSS4350SPN,115 Nexperia USA Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Surface Mount Tape & Reel (TR) 2007 Active 1 (Unlimited) 8 EAR99 ROHS3 Compliant Lead Free 8 8-SOIC (0.154, 3.90mm Width) Surface Mount 150°C TJ e4 Nickel/Palladium/Gold (Ni/Pd/Au) GULL WING 260 30 PBSS4350SPN 8 1.43W 750mW 2 NPN, PNP Dual 1.43W 50V 2.7A 50V 50V SWITCHING SILICON NPN, PNP 104ns 100nA 50V 5V 300 @ 1A 2V / 180 @ 1A 2V 340mV @ 270mA, 2.7A / 370mV @ 270mA, 2.7A
Settings Need Help?
Top FAQ's

How can I quickly find answers to my questions?

Please visit the Help & Support area of our website to find information regarding ordering, shipping, delivery and more.

What is my Order Status?

Registered users can track orders from their account dropdown, or click here. *Order Status may take 12 hours to update after initial order is placed.

How do I return product?

Users can begin the returns process by starting with our Returns Page.

How do I find price and availability?

Quotes can be created by registered users in myLists.

How do I create a 'HK JDW' Account?

Visit the Registration Page and enter the required information. You will receive an email confirmation when your registration is complete.

United Kingdom/GBP Summary
Fast Shipping Fast Delivery

Orders are typically delivered to United Kingdom within 48 hours depending on location.

Free Shipping Free Shipping

Free delivery to United Kingdom on orders of £33 or more. A delivery charge of £12 will be billed on all orders less than £33.

Incoterms Incoterms

DDP (Duty and customs paid by HK JDW)

Payment Options Payment Types

Credit account for qualified institutions and businesses

Payment in Advance by Wire Transfer

Visa Mastercard American Express PayPal Apple Pay Google Pay

Marketplace Marketplace Product

More Products From Fully Authorized Partners

Average Time to Ship 1-3 Days, extra ship charges may apply. Please see product page, cart, and checkout for actual ship speed.

Incoterms: CPT (Duty, customs, and applicable VAT/Tax due at time of delivery)

For more information visit Help & Support