Call us: +86 0755-82563503

Currency: $ US Dollar

Items : %s%s

Resistors

Resistors.jpg

Resistors are passive electronic components designed to impede the flow of electric current in a circuit. They are used to control current levels, divide voltage, and limit power dissipation. Resistors are available in various types, including fixed resistors, variable resistors (potentiometers), and specialized resistors for specific applications such as high power or precision requirements. They are fundamental components in electronic circuits, playing roles in voltage regulation, signal conditioning, and impedance matching.

Compare Image Name Manufacturer Pricing(USD) Quantity Weight(Kg) Size(LxWxH) Datasheet Factory Lead Time Mount Packaging Published Series Pbfree Code Part Status Moisture Sensitivity Level (MSL) Number of Terminations ECCN Code Max Operating Temperature Min Operating Temperature Depth Length RoHS Status Lead Free Contact Plating Voltage - Rated Radiation Hardening Additional Feature Package / Case Height Width Resistance Operating Temperature Size / Dimension Technology Height Seated (Max) Ratings Packing Method Power Rating JESD-609 Code Terminal Finish Surface Mount Max Power Dissipation Terminal Shape Mounting Feature Composition Feature Case Code (Metric) Case Code (Imperial) Tolerance Construction Temperature Coefficient Resistor Type Rated Power Dissipation (P) Working Voltage Military Standard Supplier Device Package Power (Watts)
RMCF1206JG3M90 RMCF1206JG3M90 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tape & Reel (TR) 2012 RMCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin No 1206 (3216 Metric) 711.2μm 3.9MOhm -55°C~155°C 0.126Lx0.063W 3.20mmx1.60mm 0.028 0.70mm AEC-Q200 TR, Paper, 10 Inch 250mW e3 250mW WRAPAROUND Thick Film Automotive AEC-Q200 ±5% Rectangular ±200ppm/°C FIXED RESISTOR 0.25W 1/4W
RNCF1210DKE221K RNCF1210DKE221K Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF Active 1 (Unlimited) 2 ROHS3 Compliant 1210 (3225 Metric) 221kOhm -55°C~155°C 0.122Lx0.094W 3.10mmx2.40mm 0.026 0.65mm AEC-Q200 200mW Thin Film Automotive AEC-Q200 ±0.5% ±25ppm/°C 0.333W 1/3W
RNCF2010DTC76R8 RNCF2010DTC76R8 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 2010 (5025 Metric) 76.8Ohm -55°C~155°C 0.193Lx0.094W 4.90mmx2.40mm 0.026 0.65mm AEC-Q200 TR, EMBOSSED PLASTIC, 7 INCH 250mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.5% Rectangular ±50ppm/°C FIXED RESISTOR 0.33W 0.333W 1/3W
RNCS0603BTE3K92 RNCS0603BTE3K92 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) 2012 RNCS yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin HIGH PRECISION 0603 (1608 Metric) 3.92kOhm -55°C~155°C 0.061Lx0.031W 1.55mmx0.80mm 0.022 0.55mm AEC-Q200 TR, PAPER, 7 INCH e3 WRAPAROUND Thin Film Anti-Corrosive, Automotive AEC-Q200, Moisture Resistant ±0.1% Rectangular ±25ppm/°C FIXED RESISTOR 0.063W 50V 0.063W 1/16W
RNCF1210BTC1K82 RNCF1210BTC1K82 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 1210 (3225 Metric) 1.82kOhm -55°C~155°C 0.122Lx0.094W 3.10mmx2.40mm 0.026 0.65mm AEC-Q200 TR, PAPER, 7 INCH 200mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.1% Rectangular ±50ppm/°C FIXED RESISTOR 0.33W 0.333W 1/3W
RMCF2512FT12R0 RMCF2512FT12R0 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tape & Reel (TR) 2010 RMCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin 500V No 2512 (6432 Metric) 700μm 12Ohm -55°C~155°C 0.248Lx0.126W 6.30mmx3.20mm 0.028 0.70mm AEC-Q200 TR, Plastic, 7 Inch 1W e3 1W WRAPAROUND Thick Film Automotive AEC-Q200 6432 2512 ±1% Rectangular ±100ppm/°C FIXED RESISTOR 1W
CSR1206JKR120 CSR1206JKR120 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) CSR yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant 1206 (3216 Metric) 120mOhm -55°C~155°C 0.120Lx0.061W 3.05mmx1.55mm 0.026 0.65mm TR, PAPER, 7 INCH e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thick Film Current Sense ±5% Rectangular ±100ppm/°C FIXED RESISTOR 0.5W 0.5W 1/2W
SM2615JTR470 SM2615JTR470 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 28 Weeks Surface Mount Tape & Reel (TR) 2011 SM yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin No 2615 J-Lead 3.9878mm 470mOhm -55°C~275°C 0.280Lx0.150W 7.10mmx3.80mm WIRE WOUND 0.155 3.94mm TR, PLASTIC, 13 INCH 1W e3 1W WRAPAROUND Wirewound Moisture Resistant, Pulse Withstanding ±5% Rectangular ±100ppm/°C FIXED RESISTOR 1W
RNCF2512DTE97K6 RNCF2512DTE97K6 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 2512 (6432 Metric) 97.6kOhm -55°C~155°C 0.248Lx0.122W 6.30mmx3.10mm 0.026 0.65mm AEC-Q200 TR, EMBOSSED PLASTIC, 7 INCH 500mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.5% Rectangular ±25ppm/°C FIXED RESISTOR 0.5W 150V 0.5W 1/2W
RMCF0402FT16R2 RMCF0402FT16R2 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tape & Reel (TR) 2010 RMCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin 50V No 0402 (1005 Metric) 400μm 16.2Ohm -55°C~155°C 0.039Lx0.020W 1.00mmx0.50mm 0.016 0.40mm AEC-Q200 TR, PAPER, 7 INCH 63mW e3 63mW WRAPAROUND Thick Film Automotive AEC-Q200 1005 0402 ±1% RECTANGULAR PACKAGE ±100ppm/°C FIXED RESISTOR 0.063W 0.063W 1/16W
RMCP2010FT80K6 RMCP2010FT80K6 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 15 Weeks Tape & Reel (TR) 2014 RMCP yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant 2010 (5025 Metric) 711.2μm 80.6kOhm -55°C~155°C 0.197Lx0.098W 5.00mmx2.50mm 0.028 0.70mm AEC-Q200 TR, Paper, 7 Inch 1W e3 Matte Tin (Sn) - with Nickel (Ni) barrier YES 1W WRAPAROUND SURFACE MOUNT Thick Film Automotive AEC-Q200 ±1% Rectangular ±100ppm/°C FIXED RESISTOR 1W
RNCF0805DKE1R96 RNCF0805DKE1R96 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 0805 (2012 Metric) 1.96Ohm -55°C~155°C 0.079Lx0.049W 2.00mmx1.25mm 0.026 0.65mm AEC-Q200 TR, 7 INCH 100mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.5% Rectangular ±25ppm/°C FIXED RESISTOR 150V 0.125W 1/8W
RNCF1210BTC48K7 RNCF1210BTC48K7 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 1210 (3225 Metric) 48.7kOhm -55°C~155°C 0.122Lx0.094W 3.10mmx2.40mm 0.026 0.65mm AEC-Q200 TR, PAPER, 7 INCH 200mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.1% Rectangular ±50ppm/°C FIXED RESISTOR 0.33W 0.333W 1/3W
RPC0603JT100K RPC0603JT100K Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Tape & Reel (TR) 2012 RPC yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant 0603 (1608 Metric) 558.8μm 100kOhm -55°C~155°C 0.063Lx0.031W 1.60mmx0.80mm 0.022 0.55mm AEC-Q200 TR, PAPER, 7 INCH e3 Matte Tin (Sn) - with Nickel (Ni) barrier YES 100mW WRAPAROUND SURFACE MOUNT Thick Film Automotive AEC-Q200, Pulse Withstanding ±5% Rectangular ±100ppm/°C FIXED RESISTOR 0.1W 50V 0.1W 1/10W
RNCF0603DKE61K9 RNCF0603DKE61K9 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 0603 (1608 Metric) 61.9kOhm -55°C~155°C 0.061Lx0.031W 1.55mmx0.80mm 0.022 0.55mm AEC-Q200 TR, 7 INCH 63mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.5% Rectangular ±25ppm/°C FIXED RESISTOR 0.166W 100V 0.1W 1/10W
RNCF1210BKE4R99 RNCF1210BKE4R99 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF Active 1 (Unlimited) 2 ROHS3 Compliant 1210 (3225 Metric) 4.99Ohm -55°C~155°C 0.122Lx0.094W 3.10mmx2.40mm 0.026 0.65mm AEC-Q200 200mW Thin Film Automotive AEC-Q200 ±0.1% ±25ppm/°C 0.333W 1/3W
RNCF0603DKE15K4 RNCF0603DKE15K4 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 ROHS3 Compliant PRECISION 0603 (1608 Metric) 15.4kOhm -55°C~155°C 0.061Lx0.031W 1.55mmx0.80mm 0.022 0.55mm AEC-Q200 TR, 7 INCH 63mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.5% Rectangular ±25ppm/°C FIXED RESISTOR 0.166W 100V 0.1W 1/10W
RNCF2010DTC825K RNCF2010DTC825K Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 2010 (5025 Metric) 825kOhm -55°C~155°C 0.193Lx0.094W 4.90mmx2.40mm 0.026 0.65mm AEC-Q200 TR, EMBOSSED PLASTIC, 7 INCH 250mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.5% Rectangular ±50ppm/°C FIXED RESISTOR 0.33W 0.333W 1/3W
RMCF2010FT187K RMCF2010FT187K Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tape & Reel (TR) 2012 RMCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin 400V No 2010 (5025 Metric) 700μm 187kOhm -55°C~155°C 0.197Lx0.098W 5.00mmx2.50mm 0.028 0.70mm AEC-Q200 TR, Plastic, 7 Inch 750mW e3 750mW WRAPAROUND Thick Film Automotive AEC-Q200 ±1% Rectangular ±100ppm/°C FIXED RESISTOR 0.75W 0.75W 3/4W
RNCF0402BTE127R RNCF0402BTE127R Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 0402 (1005 Metric) 127Ohm -55°C~155°C 0.039Lx0.020W 1.00mmx0.50mm 0.014 0.35mm AEC-Q200 TR, PAPER, 7 INCH 63mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier WRAPAROUND Thin Film Automotive AEC-Q200 ±0.1% Rectangular ±25ppm/°C FIXED RESISTOR 0.063W 0.063W 1/16W
RMCF1210FT8M87 RMCF1210FT8M87 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tape & Reel (TR) 2012 RMCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin No 1210 (3225 Metric) 8.87MOhm -55°C~155°C 0.126Lx0.098W 3.20mmx2.50mm 0.028 0.70mm AEC-Q200 TR, Paper, 7 Inch 330mW e3 WRAPAROUND Thick Film Automotive AEC-Q200 ±1% Rectangular ±100ppm/°C FIXED RESISTOR 0.33W 0.333W 1/3W
RMCF0402FT12K4 RMCF0402FT12K4 Stackpole Electronics Inc 0.0256
Add to Cart

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tape & Reel (TR) 2010 RMCF yes Active 1 (Unlimited) 2 EAR99 500μm ROHS3 Compliant Lead Free Tin 50V No 0402 (1005 Metric) 400μm 12.4kOhm -55°C~155°C 0.039Lx0.020W 1.00mmx0.50mm 0.016 0.40mm AEC-Q200 TR, PAPER, 7 INCH 63mW e3 63mW WRAPAROUND Thick Film Automotive AEC-Q200 1005 0402 ±1% RECTANGULAR PACKAGE ±100ppm/°C FIXED RESISTOR 0.063W Not 0.063W 1/16W
RMCP2010FT12K0 RMCP2010FT12K0 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 15 Weeks Tape & Reel (TR) 2014 RMCP yes Active 1 (Unlimited) 2 ROHS3 Compliant 2010 (5025 Metric) 711.2μm 12kOhm -55°C~155°C 0.197Lx0.098W 5.00mmx2.50mm 0.028 0.70mm AEC-Q200 TR, Paper, 7 Inch 1W e3 Matte Tin (Sn) - with Nickel (Ni) barrier YES 1W WRAPAROUND SURFACE MOUNT Thick Film Automotive AEC-Q200 ±1% Rectangular ±100ppm/°C FIXED RESISTOR 1W
RNCF1206BKE2K87 RNCF1206BKE2K87 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) 2011 RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin No PRECISION 1206 (3216 Metric) 2.87kOhm -55°C~155°C 0.120Lx0.061W 3.05mmx1.55mm 0.026 0.65mm AEC-Q200 TR, 7 INCH 125mW e3 WRAPAROUND Thin Film Automotive AEC-Q200 ±0.1% Rectangular ±25ppm/°C FIXED RESISTOR 0.33W 0.333W 1/3W
HMC0402JT56M0 HMC0402JT56M0 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 15 Weeks Tape & Reel (TR) 2016 HMC Active 1 (Unlimited) 2 ROHS3 Compliant 0402 (1005 Metric) 406.4μm 56MOhm -55°C~125°C 0.039Lx0.020W 1.00mmx0.50mm 0.016 0.40mm TR, Paper, 7 Inch e3 Matte Tin (Sn) - with Nickel (Ni) barrier YES 63mW WRAPAROUND SURFACE MOUNT Thick Film ±5% Rectangular ±400ppm/°C FIXED RESISTOR 0.063W 50V 0.063W 1/16W
RMCF2010JT22M0 RMCF2010JT22M0 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 14 Weeks Tape & Reel (TR) 2014 RMCF Active 1 (Unlimited) 2 155°C -55°C 5.0038mm ROHS3 Compliant Tin No 2010 (5025 Metric) 711.2μm 2.4892mm 22MOhms -55°C~155°C 0.197Lx0.098W 5.00mmx2.50mm 0.028 0.70mm AEC-Q200 750mW 750mW Thick Film Automotive AEC-Q200 ±5% ±200ppm/°C 2010 0.75W 3/4W
RNCF1206BKC665R RNCF1206BKC665R Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Tape & Reel (TR) 2011 RNCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant PRECISION 1206 (3216 Metric) 660.4μm 665Ohm -55°C~155°C 0.120Lx0.061W 3.05mmx1.55mm 0.026 0.65mm AEC-Q200 TR, 7 INCH 125mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier YES 250mW WRAPAROUND SURFACE MOUNT Thin Film Automotive AEC-Q200 ±0.1% Rectangular ±50ppm/°C FIXED RESISTOR 0.33W 0.333W 1/3W
RMCF2512FT300K RMCF2512FT300K Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tape & Reel (TR) 2012 RMCF yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin 500V No 2512 (6432 Metric) 700μm 300kOhm -55°C~155°C 0.248Lx0.126W 6.30mmx3.20mm 0.028 0.70mm AEC-Q200 TR, PLASTIC, 7 INCH 1W e3 1W WRAPAROUND Thick Film Automotive AEC-Q200 ±1% Rectangular ±100ppm/°C FIXED RESISTOR 1W
SM4124FTR110 SM4124FTR110 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 28 Weeks Surface Mount Tape & Reel (TR) 2011 SM yes Active 1 (Unlimited) 2 EAR99 ROHS3 Compliant Tin No 4124 J-Lead 5.0038mm 110mOhm -55°C~275°C 0.429Lx0.240W 10.90mmx6.10mm WIRE WOUND 0.195 4.95mm TR, PLASTIC, 13 INCH 2W e3 2W WRAPAROUND Wirewound Moisture Resistant, Pulse Withstanding ±1% Rectangular ±100ppm/°C FIXED RESISTOR 2W 50V
RNCF0805CTE71K5 RNCF0805CTE71K5 Stackpole Electronics Inc 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 10 Weeks Tape & Reel (TR) 2010 RNCF yes Active 1 (Unlimited) 2 ROHS3 Compliant PRECISION 0805 (2012 Metric) 660.4μm 71.5kOhm -55°C~155°C 0.079Lx0.049W 2.00mmx1.25mm 0.026 0.65mm AEC-Q200 TR, PAPER, 7 INCH 100mW e3 Matte Tin (Sn) - with Nickel (Ni) barrier YES 125mW WRAPAROUND SURFACE MOUNT Thin Film Automotive AEC-Q200 ±0.25% Rectangular ±25ppm/°C FIXED RESISTOR 150V 0.125W 1/8W
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