Call us: +86 0755-82563503

Currency: $ US Dollar

Items : %s%s

Off-Board Power Supplies

Off-board power supplies refer to electronic devices or systems that provide electrical power to other components or systems located outside of their physical enclosure. These power supplies are designed to convert and regulate electrical energy from an input source, such as mains electricity or a battery, into a form suitable for powering various electronic devices and systems. Off-board power supplies are commonly used in applications where a centralized power source is required to supply power to multiple devices or when space constraints or safety considerations make it necessary to locate the power supply separately from the equipment it powers. These power supplies come in different forms, including wall adapters, desktop power supplies, rack-mounted power supplies, and power distribution units (PDUs), and are essential in a wide range of applications such as consumer electronics, industrial equipment, telecommunications, and data centers. They provide reliable and efficient power conversion and distribution, ensuring proper operation and performance of the connected devices or systems.

Compare Image Name Manufacturer Pricing(USD) Quantity Weight(Kg) Size(LxWxH) Datasheet Factory Lead Time Lifecycle Status Mount 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 Radiation Hardening Number of Pins Additional Feature Package / Case REACH SVHC Reach Compliance Code Frequency Height Width Approval Agency Mounting Type Weight Operating Temperature Size / Dimension Technology Input Current Number of Functions Max Current Rating Power Rating Type Max Input Voltage Terminal Position Terminal Form Surface Mount JESD-30 Code Subcategory Max Power Dissipation Output Voltage Number of Outputs Output Current Feature Voltage - Output 1 Voltage - Input Output Power Current - Output 1 Max Output Power Max Output Current Efficiency Input Voltage-Nom Trim/Adjustable Output Applications Min Input Voltage Control Mode Power (Watts) Nominal Output Voltage Min Input Voltage (AC) Max Input Voltage (AC) Protections Voltage - Isolation Current - Output (Max) Voltage - Output 2 Voltage - Output 3 Total Power Output-Max Ripple Voltage (Main Out) Minimum Load Required
JWT75522/B JWT75522/B TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 15 Weeks 2012 JWT (75W) Last Time Buy 188mm RoHS Compliant 42mm 92mm CE Chassis Mount -10°C~65°C With Derating 7.40Lx3.62W x 1.65 H 188.0mmx92.0mmx42.0mm Open Frame Power Supply Modules 5V 3 Adjustable Output, DC Input Capable, PFC, Universal Input 5V 85V~265VAC 72% ITE (Commercial) 75W OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 8A 4A 500mA 12V -12V 75W 0.04242Vrms
ZWS75BAF-5/CO2 ZWS75BAF-5/CO2 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 17 Weeks PRODUCTION (Last Updated: 1 month ago) Chassis Mount 2015 ZWS75BAF (75W) yes Active 1 (Unlimited) RoHS Compliant 18 Conformal unknown 33.02mm CE Chassis Mount 229.999993g -10°C~70°C With Derating 5.90Lx1.97W x 1.30 H 150.0mmx50.0mmx33.0mm 75W Open Frame, Conformal Coated 75W 5V 1 15A Adjustable Output, DC Input Capable, Load Sharing, PFC, Universal Input 5V 85V~265VAC 75W 15A 84% ITE (Commercial) 3kV
JWS5024/C JWS5024/C TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 18 Weeks 2012 JWS (50W) Obsolete RoHS Compliant 5 36.83mm CE Chassis Mount -10°C~60°C With Derating 6.25Lx3.35W x 1.45 H 158.8mmx85.1mmx36.8mm Enclosed Power Supply Modules 24V 1 Adjustable Output, DC Input Capable, PFC, Universal Input 85V~265VAC 2.2A 2.2A 79% ITE (Commercial) 50W OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV
ZWS100AF12/A ZWS100AF12/A TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Chassis Mount 2012 ZWS-AF (100W) Obsolete 1 (Unlimited) 222mm RoHS Compliant REMOTE SHUTDOWN 35.052mm 65mm CE Chassis Mount -10°C~70°C With Derating 8.74Lx2.44W x 1.38 H 222.0mmx62.0mmx35.0mm Enclosed Power Supply Modules 100W 12V 1 Adjustable Output, DC Input Capable, Load Sharing, PFC, Universal Input 12V 85V~265VAC 8.5A 102W 8.5A 79% ITE (Commercial) OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 0.05303Vrms
FPS100024 FPS100024 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Rack 2005 FPS1000 (1000W) Active Not Applicable 70°C 0°C 127mm 40.894mm RoHS Compliant Lead Free No 24 Unknown 63Hz 40.894mm 127mm CE Rack Mount 2.000342kg 0°C~70°C With Derating 11.42Lx5.00W x 1.61 H 290.0mmx127.0mmx41.0mm 960W Front End 265V 1kW 24V 1 40A Adjustable Output, DC Input Capable, Load Sharing, PFC, Remote Sense, Standby Output, Universal Input 24V 85V~265VAC 120V~360VDC 960W 40A 960W 40A 86% ITE (Commercial) 85V 1000W 24V 85V 265V 3kV 40A
RTW481R1C RTW481R1C TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 18 Weeks PRODUCTION (Last Updated: 2 months ago) Chassis Mount 2006 RTW Not For New Designs 71°C -10°C 22.098mm 123.952mm RoHS Compliant 82.042mm 22.098mm CE, cURus, TUV Chassis Mount 249.999986g -10°C~71°C With Derating 4.88Lx0.87W x 3.23 H 124.0mmx22.0mmx82.0mm 52.8W Enclosed 50W 48V 1 1.1A Adjustable Output, DC Input Capable, Remote On/Off, Remote Sense, Universal Input 48V 85V~265VAC 52.8W 1.1A 82.5W 1.1A 85% ITE (Commercial) 50W 3kV 1.1A No
JFS1500-48 JFS1500-48 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Chassis Mount 2005 JFS Obsolete Not Applicable 140.9mm 323.5mm RoHS Compliant REMOTE SHUTDOWN 50.8mm CE Chassis Mount 3.175147kg -20°C~70°C With Derating 11.06Lx4.87W x 2.00 H 280.9mmx123.6mmx50.8mm 20A Enclosed Power Supply Modules 1.5kW 48V 1 31.2A Adjustable Output, Load Sharing, PFC, Remote On/Off, Remote Sense, Universal Input 85V~265VAC 1.5kW 31.2A 31.2A 75% ITE (Commercial) 1500W OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV
ZWS100BAF-48/A ZWS100BAF-48/A TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 17 Weeks PRODUCTION (Last Updated: 1 month ago) Chassis Mount, Panel 2010 ZWS100BAF (100W) Active 1 (Unlimited) RoHS Compliant 18 33.02mm CE Chassis Mount 2.199923kg -10°C~70°C With Derating 6.10Lx2.44W x 1.30 H 155.0mmx62.0mmx33.0mm 100.8W Enclosed 100W 48V 1 2.1A Adjustable Output, DC Input Capable, Load Sharing, PFC, Universal Input 85V~265VAC 101W 2.1A 2.1A 90% ITE (Commercial) 3kV
JWS10048/A JWS10048/A TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 18 Weeks OBSOLETE (Last Updated: 2 months ago) Chassis Mount, Panel 1999 JWS (100W) Obsolete 8 EAR99 91.95mm RoHS Compliant No 100 No SVHC 50.038mm CE Chassis Mount -10°C~60°C With Derating 7.40Lx3.62W x 1.97 H 188.0mmx91.9mmx50.0mm HYBRID 1 100.8W Enclosed UNSPECIFIED UNSPECIFIED X-XXMA-X8 Power Supply Modules 100W 48V 1 2.1A Adjustable Output, DC Input Capable, PFC, Remote Sense, Universal Input 85V~265VAC 100.8W 2.1A 100.8W 2.1A 79% 100V YES ITE (Commercial) 48V OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 0.0707Vrms
SCT67 SCT67 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Chassis Mount 2001 SC60 (60W) Obsolete Not Applicable 70°C 0°C 76.2mm RoHS Compliant 34.036mm 127mm CE Chassis Mount 249.999986g 0°C~70°C With Derating 5.00Lx3.00W x 1.34 H 127.0mmx76.2mmx34.0mm Open Frame 60W 5V 3 7A Adjustable Output, Universal Input 5V 85V~265VAC 60W 7A 1.5A 70% ITE (Commercial) 60W 7A 1.5A 700mA 24V -5V Yes
RWS150B15 RWS150B15 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 13 Weeks PRODUCTION (Last Updated: 1 month ago) RWS-B (150W) Active Not Applicable 6 compliant CSA, cUL, FCC, UL Chassis Mount -20°C~70°C With Derating 5.04Lx3.70W x 1.61 H 128.0mmx94.0mmx41.0mm HYBRID 1 Enclosed UNSPECIFIED UNSPECIFIED YES R-XXMA-X6 15V 1 DC Input Capable, PFC, Universal Input 15V 85V~265VAC 87.5% 100V YES ITE (Commercial) VOLTAGE-MODE 150W OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 10A 0.053025Vrms
VS15B-15 VS15B-15 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 OBSOLETE (Last Updated: 2 months ago) VS (15W) Obsolete Not Applicable 115.062mm RoHS Compliant 17.018mm 50.038mm Chassis Mount -10°C~60°C 4.53Lx1.97W x 0.67 H 115.0mmx50.0mmx17.0mm Open Frame 1 DC Input Capable 15V 85V~132VAC 110V~175VDC 1A ITE (Commercial) 15W 2kV 1A
CUS150M18/A CUS150M18/A TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 22 Weeks CUS150M (150W) Active Not Applicable RoHS Compliant Chassis Mount -20°C~85°C With Derating 4.57Lx2.52W x 1.57 H 116.0mmx64.0mmx39.7mm Enclosed 1 Standby Output, Universal Input 18V 85V~264VAC 94% ITE (Commercial), Medical 150W 150W Forced Air 4kV 8.33A
CUS60M18/SF CUS60M18/SF TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 16 Weeks CUS60M (60W) Active 1 (Unlimited) RoHS Compliant CE Chassis Mount -20°C~70°C With Derating 3.00Lx2.00W x 0.95 H 76.2mmx50.8mmx24.2mm Open Frame 1 Adjustable Output, Universal Input 18V 85V~265VAC 88% Household Appliances, ITE (Commercial), Medical 59W 4kV 3.25A
RWS50B24/CO2 RWS50B24/CO2 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 13 Weeks PRODUCTION (Last Updated: 2 months ago) Chassis Mount 2014 RWS-B (50W) Active 1 (Unlimited) 6 RoHS Compliant 34.036mm CE Chassis Mount 229.999993g -20°C~70°C With Derating 3.20Lx3.23W x 1.34 H 81.5mmx82.0mmx34.0mm HYBRID 1 Enclosed, Conformal Coated UNSPECIFIED UNSPECIFIED R-XXMA-X6 Power Supply Modules 50W 24V 1 Adjustable Output, DC Input Capable, Universal Input 85V~265VAC 52.8W 2.2A 52.8W 2.2A 87% 100V YES ITE (Commercial) VOLTAGE-MODE OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 0.053025Vrms
ZWS150BP48 ZWS150BP48 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 16 Weeks PRODUCTION (Last Updated: 2 months ago) Chassis Mount, Panel 2012 ZWS-BP (150W) Active 1 (Unlimited) 37mm RoHS Compliant REMOTE SHUTDOWN No SVHC 34mm 75mm CE Chassis Mount 359.999991g -10°C~70°C With Derating 6.30Lx2.95W x 1.46 H 160.0mmx75.0mmx37.0mm 153.6W Open Frame 265V Power Supply Modules 150W 48V 1 3.2A Adjustable Output, DC Input Capable, Load Sharing, PFC, Universal Input 85V~265VAC 153.6W 3.2A 153.6W 3.2A 87% ITE (Commercial) 85V 48V 85V 265V OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV
LZSA15003 LZSA15003 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 18 Weeks Desktop LZSA (1500W) Obsolete 142.8mm RoHS Compliant No 123.952mm CE Chassis Mount 290.000001g -40°C~71°C With Derating 10.50Lx5.62W x 4.75 H 266.7mmx142.7mmx120.7mm 1.512kW Enclosed 24V 1 63A Adjustable Output, DC Input Capable, Load Sharing, PFC, Remote On/Off, Remote Sense, Universal Input 85V~265VAC 1.512kW 63A 1.512kW 63A 84% ITE (Commercial) 1500W 3kV
TL200048 TL200048 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 TL (2000W) Obsolete Not Applicable RoHS Compliant 87.63mm Chassis Mount -40°C~65°C 11.13Lx3.45W x 3.41 H 282.7mmx87.6mmx86.6mm Enclosed 1 Remote On/Off, Remote Sense 48V 90V~264VAC 40A 92% ITE (Commercial), Medical 2000W
ZWQ1305222 ZWQ1305222 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 17 Weeks Chassis Mount 2015 ZWQ (130W) Active 1 (Unlimited) 225mm RoHS Compliant No 24 REMOTE SHUTDOWN 35.052mm 106mm CE Chassis Mount -10°C~60°C With Derating 8.86Lx4.17W x 1.38 H 225.0mmx106.0mmx35.0mm 2.6A Open Frame Power Supply Modules 130W 5V 4 Adjustable Output, PFC, Universal Input 5V 85V~265VAC 19A 170W 4A 72% ITE (Commercial) OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 15A 4A 4A 4A 12V -12V Yes
LS5024/L LS5024/L TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks 2008 LS (50W) Active 1 (Unlimited) RoHS Compliant CE Chassis Mount -25°C~70°C With Derating 3.90Lx3.80W x 1.40 H 99.1mmx96.5mmx35.6mm Open Frame 1 Adjustable Output, DC Input Capable, Universal Input 24V 88V~264VAC 86% ITE (Commercial) 50W 3kV 2.2A
RWS300B15/CO2 RWS300B15/CO2 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 13 Weeks PRODUCTION (Last Updated: 2 months ago) Chassis Mount 2014 RWS-B (300W) Active 1 (Unlimited) 8 RoHS Compliant No 40.894mm CE Chassis Mount 907.18474g -20°C~70°C With Derating 6.70Lx4.02W x 1.61 H 170.0mmx102.0mmx41.0mm HYBRID 1 Enclosed, Conformal Coated UNSPECIFIED UNSPECIFIED R-XXMA-X8 Power Supply Modules 300W 15V 1 Adjustable Output, DC Input Capable, Universal Input 85V~265VAC 300W 20A 300W 20A 84% 100V YES ITE (Commercial) VOLTAGE-MODE OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 0.053025Vrms
CUS150M15/A CUS150M15/A TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 22 Weeks CUS150M (150W) Active Not Applicable RoHS Compliant Chassis Mount -20°C~85°C With Derating 4.57Lx2.52W x 1.57 H 116.0mmx64.0mmx39.7mm Enclosed 1 Standby Output, Universal Input 15V 85V~264VAC 94% ITE (Commercial), Medical 150W 150W Forced Air 4kV 10A
JWT75525 JWT75525 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 18 Weeks 2012 JWT (75W) Not For New Designs 188mm RoHS Compliant 42mm 92mm CE Chassis Mount -10°C~65°C With Derating 7.40Lx3.62W x 1.65 H 188.0mmx92.0mmx42.0mm Open Frame Power Supply Modules 5V 3 Adjustable Output, DC Input Capable, PFC, Universal Input 5V 85V~265VAC 72% ITE (Commercial) 75W OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 8A 4A 500mA 12V -5V 75W 0.04242Vrms
LS75-48 LS75-48 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks 2008 LS (75W) Active Not Applicable RoHS Compliant CE Chassis Mount -25°C~70°C With Derating 5.10Lx3.80W x 1.50 H 129.5mmx96.5mmx38.1mm Enclosed 1 Adjustable Output, DC Input Capable, Universal Input 48V 88V~264VAC 75W 87% ITE (Commercial) 75W 3kV 1.6A
RWS1500B36/FO RWS1500B36/FO TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 13 Weeks 2017 RWS1500B (1500W) Active 1 (Unlimited) RoHS Compliant CE Chassis Mount -20°C~60°C With Derating 10.28Lx5.00W x 2.48 H 261.1mmx127.0mmx63.0mm Enclosed 1 Adjustable Output, DC Input Capable, Load Sharing, Remote Sense, Universal Input 36V 85V~265VAC 120V~340VDC 88% ITE (Commercial) 1512W 4kV 42A
ZWS100BAF-15 ZWS100BAF-15 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 17 Weeks PRODUCTION (Last Updated: 1 month ago) Chassis Mount, Panel 2010 ZWS100BAF (100W) Active 1 (Unlimited) 72mm RoHS Compliant No 18 Unknown 33.02mm CE Chassis Mount 290.000001g -10°C~70°C With Derating 6.10Lx2.44W x 1.30 H 155.0mmx62.0mmx33.0mm 100.5W Open Frame 265V 100W 15V 1 6.7A Adjustable Output, DC Input Capable, Load Sharing, PFC, Universal Input 85V~265VAC 101W 6.7A 100.5W 6.7A 86% ITE (Commercial) 85V 15V 85V 265V 3kV
ZWS1512/JA ZWS1512/JA TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 2014 ZWS (15W) Obsolete 1 (Unlimited) compliant 50mm CE Chassis Mount -10°C~60°C With Derating 4.93Lx1.97W x 0.83 H 125.2mmx50.0mmx21.0mm Enclosed Power Supply Modules 12V 1 Adjustable Output, DC Input Capable, Universal Input 12V 85V~265VAC 71% ITE (Commercial) 15W OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 1.25A
SCS120P12 SCS120P12 TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 SC120 (120W) Obsolete Not Applicable RoHS Compliant 204.978mm CE Chassis Mount 0°C~50°C 7.00Lx4.00W x 1.65 H 177.8mmx101.6mmx41.9mm Open Frame 1 Adjustable Output, PFC, Remote Sense 12V 90V~264VAC 6.7A 70% ITE (Commercial) 80W 110W Forced Air
CUT75522/B CUT75522/B TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 16 Weeks Chassis Mount, Screw 2014 CUT75 (75W) Active 127mm RoHS Compliant 26.924mm 76mm CE, TUV Chassis Mount -20°C~70°C With Derating 5.00Lx3.00W x 1.06 H 127.0mmx76.2mmx26.9mm Open Frame Power Supply Modules 75W 5V 3 Adjustable Output, Baseplate, DC Input Capable, Universal Input 5V 85V~265VAC 75W 1A 85% ITE (Commercial) OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV 8A 3A 1A 12V -12V 0.04242Vrms No
JWS5015/RA JWS5015/RA TDK-Lambda Americas Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 10 Weeks OBSOLETE (Last Updated: 2 months ago) 2012 JWS (50W) Obsolete RoHS Compliant 5 REMOTE SHUTDOWN 48.006mm CE Chassis Mount -10°C~60°C With Derating 6.25Lx3.35W x 1.45 H 158.8mmx85.1mmx36.8mm Enclosed Power Supply Modules 15V 1 Adjustable Output, DC Input Capable, PFC, Remote On/Off, Universal Input 85V~265VAC 3.5A 3.5A 77% ITE (Commercial) 50W OUTPUT OVER CURRENT; OUTPUT OVER VOLTAGE 3kV
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