Call us: +86 0755-82563503

Currency: $ US Dollar

Items : %s%s

Voltage Reference

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 Termination ECCN Code Max Operating Temperature Min Operating Temperature Length RoHS Status Lead Free Radiation Hardening Number of Pins Additional Feature Package / Case Max Supply Voltage REACH SVHC Min Supply Voltage Frequency Height Width Thickness Mounting Type Weight Operating Temperature Technology Operating Supply Current Max Supply Current Current - Supply Height Seated (Max) HTS Code Number of Functions Nominal Supply Current Nominal Input Voltage Max Input Voltage JESD-609 Code Terminal Finish Terminal Position Terminal Form Peak Reflow Temperature (Cel) Supply Voltage Time@Peak Reflow Temperature-Max (s) Base Part Number Pin Count Output Type Temperature Grade Surface Mount Terminal Pitch JESD-30 Code Supply Voltage-Min (Vsup) Operating Temperature (Max) Operating Temperature (Min) Number of Channels Subcategory Qualification Status Power Supplies Supply Voltage-Max (Vsup) Max Power Dissipation Output Voltage Number of Elements Number of Outputs Voltage - Output Voltage - Input Max Output Current Trim/Adjustable Output Analog IC - Other Type Output Voltage-Max Forward Voltage Tolerance Input Offset Voltage (Vos) Response Time Temperature Coefficient Dropout Voltage Current - Output Min Input Voltage Supply Current-Max (Isup) Adjustable Threshold Max Dual Supply Voltage Min Dual Supply Voltage Supplier Device Package Max Output Voltage Quiescent Current Reference Voltage Min Output Voltage Voltage Gain Neg Supply Voltage-Max (Vsup) Neg Supply Voltage-Min (Vsup) Current - Input Bias Reference Type Output Voltage-Min Current - Cathode Voltage - Output (Min/Fixed) Temp Coef of Voltage-Max Noise - 0.1Hz to 10Hz Noise - 10Hz to 10kHz Voltage - Output (Max)
ISL60002BIH311Z-TK ISL60002BIH311Z-TK Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 6 Weeks Cut Tape (CT) 2004 FGA™ Active 1 (Unlimited) 3 EAR99 2.92mm ROHS3 Compliant TO-236-3, SC-59, SOT-23-3 1.3mm Surface Mount -40°C~85°C TA CMOS 900nA 1.12mm 8542.39.00.01 1 e3 Matte Tin (Sn) - annealed DUAL GULL WING NOT SPECIFIED 3V NOT SPECIFIED ISL60002 3 Fixed YES 0.95mm R-PDSO-G3 2.7V 5.5V 1.2V 1 2.7V~5.5V NO THREE TERMINAL VOLTAGE REFERENCE 2.2V ±0.08% 20ppm/°C 7mA Series 1.2V 20 ppm/°C 30μVp-p
TL4051AQDCKT TL4051AQDCKT Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Surface Mount Tape & Reel (TR) yes Discontinued 1 (Unlimited) 5 EAR99 2mm ROHS3 Compliant Contains Lead No 5-TSSOP, SC-70-5, SOT-353 Surface Mount -40°C~125°C TA BIPOLAR 1 15V e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 TL4051 5 Adjustable 0.65mm R-PDSO-G5 1 Voltage References 10V 1 12mA YES TWO TERMINAL VOLTAGE REFERENCE ±0.1% 50ppm/°C Shunt 70μA 1.212V 50 ppm/°C 20μVrms
LM4040BIM3-3.0 LM4040BIM3-3.0 Rochester Electronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Obsolete 1 (Unlimited) Non-RoHS Compliant
LM4040B50H5TA LM4040B50H5TA Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) 2012 yes Obsolete 1 (Unlimited) 5 EAR99 2mm ROHS3 Compliant No 5 5-TSSOP, SC-70-5, SOT-353 Surface Mount -40°C~125°C TA 1 e3 Matte Tin (Sn) DUAL GULL WING 260 40 LM4040 5 Fixed 1 Voltage References 5V 1 15mA NO TWO TERMINAL VOLTAGE REFERENCE ±0.2% 100ppm/°C 5V Shunt 83μA 80μVrms
TL4051B12QDBZRG4 TL4051B12QDBZRG4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Surface Mount Tape & Reel (TR) yes 1 3 EAR99 125°C -40°C 2.92mm RoHS Compliant Contains Lead No 3 SOT-23-3 BIPOLAR 1 e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 3 AUTOMOTIVE 0.95mm 1 Voltage References 1.225V 1 1.225V 12mA NO TWO TERMINAL VOLTAGE REFERENCE 0.2% 50 ppm/°C 12mA Shunt 60μA
LM4041C12ILP LM4041C12ILP Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 6 Weeks ACTIVE (Last Updated: 3 days ago) Bulk yes Active 1 (Unlimited) 3 EAR99 4.3mm ROHS3 Compliant Lead Free No 3 TO-226-3, TO-92-3 (TO-226AA) No SVHC 5.34mm 4.3mm 3.6mm Through Hole 213.188414mg -40°C~85°C TA BIPOLAR 1 10V e3 Matte Tin (Sn) BOTTOM LM4041 3 Fixed NO 1 Voltage References 1.225V 1 12mA NO TWO TERMINAL VOLTAGE REFERENCE ±0.5% 100ppm/°C 10V 1.225V 1.225V 1.225V Shunt 80μA 20μVrms
TLVH431BIDBVT TLVH431BIDBVT Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 5 days ago) Tape & Reel (TR) yes Active 1 (Unlimited) 5 EAR99 2.9mm ROHS3 Compliant Lead Free No 5 SC-74A, SOT-753 1.45mm 1.6mm 1.2mm Surface Mount -40°C~85°C TA BIPOLAR 1 20V e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 TLVH431 5 Adjustable YES Voltage References 18V 1 80mA YES THREE TERMINAL VOLTAGE REFERENCE ±0.5% 129 ppm/°C 70mA 18V 1.24V Shunt 100μA 1.24V 138 ppm/°C
TLVH431BILP TLVH431BILP Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 6 Weeks ACTIVE (Last Updated: 4 days ago) Bulk yes Active 1 (Unlimited) 3 EAR99 4.3mm ROHS3 Compliant Lead Free No 3 TO-226-3, TO-92-3 (TO-226AA) 5.34mm 4.3mm 3.6mm Through Hole 213.188414mg -40°C~85°C TA BIPOLAR 1 20V e3 Matte Tin (Sn) BOTTOM TLVH431 3 Adjustable NO 1 Voltage References 18V 1 80mA YES THREE TERMINAL VOLTAGE REFERENCE ±0.5% 129 ppm/°C 70mA 18V 1.24V Shunt 100μA 1.24V
AD588JQ AD588JQ Analog Devices Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 10 Weeks PRODUCTION (Last Updated: 1 month ago) Tube no Active 1 (Unlimited) 16 Through Hole EAR99 21.34mm Non-RoHS Compliant Contains Lead No 16 5V OUTPUT IS ALSO AVAILABLE 16-CDIP (0.300, 7.62mm) No SVHC 3.56mm 7.87mm Through Hole 0°C~70°C TA BIPOLAR 10mA 1 36V e0 Tin/Lead (Sn63Pb37) DUAL 15V AD588 16 Programmable NO 13.5V 2 Voltage References 18V 600mW 10V 2 10.8V~36V 10mA YES THREE TERMINAL VOLTAGE REFERENCE 10V ±0.03% 3ppm/°C 12V 10V 10mA -10V 10V -18V -13.5V Series ±5V ±10V 3 ppm/°C 6μVp-p
REF2940AIDBZRG4 REF2940AIDBZRG4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 4 days ago) Tape & Reel (TR) yes Active 1 (Unlimited) 3 EAR99 2.92mm ROHS3 Compliant Lead Free No 3 TO-236-3, SC-59, SOT-23-3 1.22mm 1.3mm 1mm Surface Mount -40°C~125°C TA CMOS 59μA 50μA 1 42μA 5.5V e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 5V REF2940 3 Fixed YES 0.96mm 4.146V Voltage References 4.096V 1 4.146V~5.5V 25mA NO THREE TERMINAL VOLTAGE REFERENCE ±2% 100ppm/°C 4.097V 4.096V 42μA 4.096V Series 100 ppm/°C 45μVp-p 128μVrms
MAX6225AESA+ MAX6225AESA+ Maxim Integrated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 6 Weeks Tube 2001 yes Active 1 (Unlimited) 8 EAR99 4.9mm ROHS3 Compliant 8 8-SOIC (0.154, 3.90mm Width) 1kHz 3.9mm Surface Mount -40°C~85°C TA BIPOLAR 3mA 1 e3 Matte Tin (Sn) DUAL GULL WING 260 10V NOT SPECIFIED MAX6225 8 Fixed YES 8V Voltage References Not Qualified 36V 2.5V 1 8V~36V YES THREE TERMINAL VOLTAGE REFERENCE ±0.04% 3ppm/°C 15mA 3mA Series, Buried Zener 3 ppm/°C 1.5μVp-p 1.3μVrms
AP431SHAZTR-G1 AP431SHAZTR-G1 Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 23 Weeks Tape & Box (TB) yes Active 1 (Unlimited) 3 EAR99 ROHS3 Compliant TO-226-3, TO-92-3 (TO-226AA) (Formed Leads) Through Hole -40°C~125°C TA 8542.39.00.01 1 e3 Matte Tin (Sn) BOTTOM NOT SPECIFIED NOT SPECIFIED Adjustable NO O-XBCY-T3 2.495V 1 YES TWO TERMINAL VOLTAGE REFERENCE ±0.5% 100mA Shunt 2.483V 100μA 2.495V 43.724 ppm/°C 36V
ATL431LIAQDBZRQ1 ATL431LIAQDBZRQ1 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks Automotive, AEC-Q100 yes Active 1 (Unlimited) 3 2.92mm ROHS3 Compliant TO-236-3, SC-59, SOT-23-3 1.3mm Surface Mount -40°C~125°C TA 1.12mm 1 e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING ATL431 Adjustable YES R-PDSO-G3 2.5V 1 YES TWO TERMINAL VOLTAGE REFERENCE ±1% 15mA Shunt 2.475V 80μA 2.5V 66 ppm/°C 36V
LM4050BEM3X-2.5/NOPB LM4050BEM3X-2.5/NOPB Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 1 week ago) Surface Mount Tape & Reel (TR) yes Active 1 (Unlimited) 3 EAR99 2.92mm ROHS3 Compliant Lead Free No 3 TO-236-3, SC-59, SOT-23-3 1.22mm 1.3mm 1mm Surface Mount -40°C~125°C TA BIPOLAR 1 e3 Matte Tin (Sn) DUAL GULL WING 260 LM4050 3 Fixed 0.95mm Voltage References 2.5V 1 15mA NO TWO TERMINAL VOLTAGE REFERENCE ±0.2% 50ppm/°C 2.5V 2.5V Shunt 65μA 50 ppm/°C 41μVrms
AD586KR AD586KR Analog Devices Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube no Obsolete 1 (Unlimited) 8 EAR99 4.9mm Non-RoHS Compliant Contains Lead No 8 8-SOIC (0.154, 3.90mm Width) 3.9mm Surface Mount 0°C~70°C TA BIPOLAR 3mA 1 3mA 36V e0 DUAL GULL WING 235 15V 20 AD586 8 Fixed YES 1 Voltage References 5V 1 10.8V~36V 10mA YES THREE TERMINAL VOLTAGE REFERENCE ±0.1% 15ppm/°C 10.8V 5V 3mA 5V Series 4μVp-p
SC431LC5SK.5TRT SC431LC5SK.5TRT Semtech Corporation 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Surface Mount Tape & Reel (TR) yes Obsolete 1 (Unlimited) 5 EAR99 2.9mm RoHS Compliant Lead Free SC-74A, SOT-753 1.6mm Surface Mount 0°C~70°C TA BIPOLAR 1.45mm 8542.39.00.01 1 e3 Matte Tin (Sn) DUAL GULL WING 260 NOT SPECIFIED SC431 5 Adjustable 0.95mm R-PDSO-G5 Voltage References Not Qualified 1.24V 1 YES THREE TERMINAL VOLTAGE REFERENCE ±0.5% 100mA 16V 1.24V Shunt 100μA 1.24V 288.018 ppm/°C
LM4040D30ILPR LM4040D30ILPR Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 6 days ago) Tape & Box (TB) yes Active 1 (Unlimited) 3 EAR99 4.3mm ROHS3 Compliant Lead Free No 3 TO-226-3, TO-92-3 (TO-226AA) (Formed Leads) 5.34mm 4.3mm 3.6mm Through Hole 213.188414mg -40°C~85°C TA BIPOLAR 1 e3 Matte Tin (Sn) BOTTOM 5V LM4040 3 Fixed NO 1 Voltage References 3V 1 15mA NO TWO TERMINAL VOLTAGE REFERENCE ±1% 150ppm/°C Shunt 82μA 35μVrms
TL1431CPWG4 TL1431CPWG4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 yes 1 (Unlimited) 8 EAR99 70°C 0°C 4.4mm RoHS Compliant Contains Lead No 8 OUTPUT VOLTAGE ADJUSTABLE FROM 2.5V TO 36V TSSOP 3mm 39.008944mg BIPOLAR 1 37V e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 2.5V 8 COMMERCIAL YES 0.65mm 2.5V 1 Voltage References 2.5V 1 36V 100mA YES TWO TERMINAL VOLTAGE REFERENCE 0.4% 114 ppm/°C 100mA Adjustable, Shunt 1mA
LT6656ACS6-2.5#TRPBF LT6656ACS6-2.5#TRPBF Analog Devices, Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download PRODUCTION (Last Updated: 2 weeks ago) Surface Mount Tape & Reel (TR) 70°C 0°C RoHS Compliant 6 SOT-23-6 1.5μA Fixed 0.05% 10 ppm/°C 5mA 2.5V 2.5V Series
MAX6725KATID3-T MAX6725KATID3-T Maxim Integrated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 no 1 (Unlimited) 8 EAR99 2.9mm RoHS Compliant 1.625mm BICMOS 1.45mm 8542.39.00.01 1 e0 Tin/Lead (Sn/Pb) DUAL GULL WING 245 NOT SPECIFIED 8 INDUSTRIAL YES 0.65mm R-PDSO-G8 0.8V 85°C -40°C 3 Power Management Circuits Not Qualified 1/5V 5.5V POWER SUPPLY MANAGEMENT CIRCUIT YES
LT6660HCDC-10#PBF LT6660HCDC-10#PBF Analog Devices, Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Surface Mount 70°C 0°C 2mm RoHS Compliant 3 DFN EP 20 ppm/°C 10V
LT1236ACS8-10#TR LT1236ACS8-10#TR Analog Devices, Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Surface Mount 70°C 0°C RoHS Compliant Contains Lead 8 SOIC 2mA Fixed 10V 0.05% 5 ppm/°C 10mA 10V 1.7mA 10V Buried Zener, Series, Shunt 1.7mA
LM4140CCMX-4.1 LM4140CCMX-4.1 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Surface Mount Tape & Reel (TR) no Obsolete 1 (Unlimited) 8 EAR99 4.9mm Non-RoHS Compliant Contains Lead No 8 8-SOIC (0.154, 3.90mm Width) 3.9mm Surface Mount 0°C~70°C TA 400μA 1 5.6V e0 Tin/Lead (Sn/Pb) DUAL GULL WING 235 5V LM4140 8 Fixed 4.296V 1 Voltage References 5.5V 4.096V 1 1.8V~5.5V 8mA NO THREE TERMINAL VOLTAGE REFERENCE ±0.1% 10ppm/°C 195mV 350μA Series 2.2μVp-p
ADR291WFRZ-RL ADR291WFRZ-RL Analog Devices Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 14 Weeks PRODUCTION (Last Updated: 2 weeks ago) Tape & Reel (TR) Automotive no Active 1 (Unlimited) 8 EAR99 ROHS3 Compliant Contains Lead No 8 8-SOIC (0.154, 3.90mm Width) Surface Mount -40°C~125°C TA 12μA 12μA 18V e3 Matte Tin (Sn) DUAL GULL WING 260 30 ADR291 8 Fixed YES 1 Voltage References 2.5V 3V~15V 5mA NO THREE TERMINAL VOLTAGE REFERENCE ±0.33% 20ppm/°C 15μA 2.5V Series 8μVp-p
LTC6655CHMS8-2.5#TRPBF LTC6655CHMS8-2.5#TRPBF Linear Technology / Analog Devices 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 8 Weeks Tape & Reel (TR) Active 1 (Unlimited) 8 EAR99 3mm ROHS3 Compliant 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) 3mm Surface Mount -40°C~125°C TA CMOS 7.5mA 1.1mm 8542.39.00.01 1 e3 Matte Tin (Sn) DUAL GULL WING 260 3V 30 LTC6655 8 Fixed YES 0.65mm S-PDSO-G8 3V Voltage References Not Qualified 13.2V 2.5V 1 3V~13.2V NO THREE TERMINAL VOLTAGE REFERENCE 2.5012V ±0.05% 5ppm/°C 5mA Series 2.5V 5 ppm/°C 0.25ppmp-p
TL431AILPR TL431AILPR Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 3 days ago) Tape & Reel (TR) yes Active 1 (Unlimited) 3 EAR99 4.3mm ROHS3 Compliant Lead Free 3 TO-226-3, TO-92-3 (TO-226AA) (Formed Leads) No SVHC 5.34mm 4.3mm 3.6mm Through Hole 213.188414mg -40°C~85°C TA BIPOLAR 1 37V e3 Matte Tin (Sn) BOTTOM NOT SPECIFIED NOT SPECIFIED TL431 3 Adjustable NO 1 Voltage References Not Qualified 36V 1 100mA YES THREE TERMINAL VOLTAGE REFERENCE ±1% 34 ppm/°C 2.495V 36V 36V Shunt 700μA 92 ppm/°C
AZ431LBKTR-G1 AZ431LBKTR-G1 Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 23 Weeks Surface Mount Tape & Reel (TR) 2014 Active 1 (Unlimited) 125°C -40°C ROHS3 Compliant No 5 SC-74A, SOT-753 Surface Mount -40°C~125°C TA Adjustable 18V 100mA ±1% 20ppm/°C Typical 100mA SOT-23-5 18V 1.24V Shunt 80μA 1.24V 18V
LM319J LM319J Analog Devices, Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Through Hole 70°C 0°C RoHS Compliant No 14 CDIP 30V 5V 4.3mA 4.3mA 2 8mV 80 ns 15V 2.5V 92.04dB 150nA
TLVH431CDBZRG4 TLVH431CDBZRG4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 6 Weeks ACTIVE (Last Updated: 3 days ago) Tape & Reel (TR) yes Active 1 (Unlimited) 3 EAR99 2.92mm ROHS3 Compliant Lead Free No 3 TO-236-3, SC-59, SOT-23-3 1.22mm 1.3mm 1mm Surface Mount 0°C~70°C TA BIPOLAR 1 20V e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 TLVH431 3 Adjustable YES 0.95mm Voltage References 18V 1 80mA YES THREE TERMINAL VOLTAGE REFERENCE ±1.5% 129 ppm/°C 70mA 18V 1.24V Shunt 100μA 1.24V
AS431HBZTR-G1 AS431HBZTR-G1 Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 23 Weeks Tape & Box (TB) Active 3 EAR99 ROHS3 Compliant TO-226-3, TO-92-3 (TO-226AA) (Formed Leads) Through Hole -40°C~125°C TA 4μA 8542.39.00.01 1 e3 Matte Tin (Sn) BOTTOM NOT SPECIFIED NOT SPECIFIED Adjustable NO O-XBCY-T3 2.495V 1 YES THREE TERMINAL VOLTAGE REFERENCE ±0.1% 20ppm/°C Typical 100mA Shunt 2.47V 500μA 2.495V 36V
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