A 60W USB-C cable has a maximum power-carrying rating; it is not a promise that every connected device will charge at 60W. For the FAYA cable, the stated limit is 20 volts at 3 amps, which equals 60 watts.
The cable is only one part of the charging setup. The charger must offer a suitable output, the device must support that charging method, and all three components must agree on a compatible voltage and current. Temperature, charger power sharing and the device's own charging controls can reduce power further.
What the 60W number tells you
Electrical power is calculated as:
Power in watts = voltage × current
For a cable rated at 20V/3A:
20V × 3A = 60W
The same 3A current limit produces less power at a lower voltage. These calculations are examples, not a list of outputs that every charger provides:
5V × 3A = 15W
9V × 3A = 27W
15V × 3A = 45W
20V × 3A = 60W
Reaching 60W therefore requires more than connecting a 60W cable. The charger must be able to offer 20V at up to 3A, and the device must be designed to request and accept that combination.
USB Power Delivery, or USB PD, provides a way for compatible equipment to negotiate power. USB-IF describes USB PD as a flexible power-delivery system in which devices can take the power they require rather than automatically receiving the source's maximum output. Its current framework extends beyond 60W, but higher power levels require suitable chargers, devices and cables. See the USB-IF USB Power Delivery overview.
A 60W marking therefore tells you the cable's declared power ceiling. It does not tell you how much power the charger can produce or how much the receiving device will use.
Charging power follows the lowest compatible limit
A practical way to assess a setup is to find the lowest mutually compatible limit among:
the output available from the charger port;
the voltage and current profiles offered by that charger;
the charging protocol supported by both charger and device;
the cable's voltage and current rating; and
the device's permitted charging input.
Suppose a charger can provide 65W, the cable is rated for 60W and the phone accepts up to 27W through a compatible profile. The expected ceiling is 27W, not 60W or 65W.
Reverse one component and the result changes. If the phone can accept 45W but the charger port supplies only 20W, changing from a 20W-capable cable to a 60W cable will not turn the charger into a 45W source.
This is also why a higher-rated charger does not normally force its full output into a smaller device. With compatible USB PD equipment, the device requests an available level it can use. Electrical Safety First describes fast charging as a negotiated digital handshake rather than the charger simply applying a higher voltage without communication. See its USB charger safety guidance.
Why 3A and 5A cable requirements matter
Watts and amps describe different things. Watts measure power, while amps measure current. That distinction matters when a manufacturer specifies a 5A cable even though the charger's headline power appears to be below 60W.
A 60W, 20V/3A cable is limited to 3A. A charging arrangement that requires more than 3A needs a cable designed and identified for that higher current. The USB Type-C specification states that cables rated above 3A are electronically marked so compatible equipment can identify their capabilities. See the USB Type-C Cable and Connector Specification.
USB-IF's current certification programme uses 60W and 240W power markings for USB-C-to-USB-C cables. Its compliance guidance also separates the cable's power marking from any data-rate marking. A 60W or 240W logo is a controlled USB-IF mark only when the relevant product has passed the certification process and the supplier is authorised to use it. See USB-IF cables and connectors and its logo licence requirements.
This does not mean that every cable advertised as 60W is USB-IF certified. A seller's wattage statement, by itself, is not proof of certification.
Samsung provides a useful example of why the exact combination matters. Its UK guidance says the EP-T4511 45W charger supports Super Fast Charging 2.0 based on use with a 45W, 5A cable. The same page says that Galaxy S25 and later models can use the included 3A cable for that mode with the specified charger. Samsung also lists a newer 60W charger arrangement based on a 60W, 3A cable. These instructions cannot be reduced to a universal rule that every 45W phone either always needs or never needs 5A. Check the exact phone, charger and cable combination in the current Samsung UK charging guidance.
USB-C, USB PD and PPS are not the same specification
USB-C describes the connector and port format. USB PD is a power-negotiation system. PPS, or Programmable Power Supply, is a USB PD feature through which compatible equipment can request adjustable voltage and current levels.
A device may require PPS to enter a particular manufacturer-labelled charging mode. A charger can consequently have a large total wattage but still miss the required profile or protocol. Samsung explicitly advises checking for both USB PD and PPS when selecting equipment for its supported Super Fast Charging modes.
USB-IF's terminology guidance warns that USB-C, USB Power Delivery and USB data performance are not interchangeable terms. A product can use a USB-C connector without supporting every USB data standard, charging feature or video mode. See the USB-IF terminology and packaging guidance.
Power, data speed and video are separate capabilities
The 60W number describes power capacity. It does not establish whether the cable transfers data at 480Mbps, 5Gbps, 10Gbps or another rate.
USB-IF notes that a USB 2.0 Type-C cable can support USB Power Delivery while remaining limited to USB 2.0 data operation of up to 480Mbps. Such a cable does not contain the signal connections required for USB 3.2, USB4 or Alt Mode. A cable can therefore be entirely suitable for charging yet unsuitable for a high-speed external SSD, dock or monitor.
Apple's current iPhone guidance illustrates the distinction. The USB-C charge cable supplied with supported iPhones operates at USB 2 data speeds, while the listed Pro models require an appropriate USB 3 cable for data rates up to 10Gbit/s. Display connections also require a cable with the necessary data and DisplayPort capabilities. See Apple's USB-C iPhone guidance.
When choosing a cable for a non-charging task, look for a separate, explicit specification covering:
data rate;
USB generation or performance level;
DisplayPort or other video support;
resolution and refresh-rate limits where relevant; and
dock or monitor compatibility.
If those details are not published, treat them as unknown. Do not infer them from the connector shape or wattage.
Four hypothetical charging examples
These examples apply published specifications and simple calculations. They are not measured FAYA performance tests.
1. A 20W phone with a 65W charger
Assume a phone accepts up to 20W through a profile offered by a 65W USB PD charger. It is connected with a 60W cable.
Charger ceiling: 65W
Cable ceiling: 60W
Phone ceiling: 20W
Hypothetical system ceiling: 20W
The spare charger and cable capacity does not get forced into the phone.
2. A Pixel 9 Pro XL charging setup
Google states that the Pixel 9 Pro XL supports USB PD fast charging and identifies 37W as the maximum charger power needed to achieve its maximum charging speed. See Google's Pixel 9 regulatory charging information.
Hypothetically, a 60W/3A cable has enough total wattage capacity for 37W. That alone does not guarantee the phone will reach 37W: the charger must provide a compatible USB PD output, and the phone controls the power used during the session.
3. A Samsung 45W arrangement
Assume a Galaxy model and Samsung charger combination for which Samsung specifies a 5A cable. A generic 60W/3A cable should not be treated as equivalent merely because 60 is numerically higher than 45.
For Galaxy S25 and later models, Samsung documents a specific exception involving the included 3A cable and supported chargers. That exception should not be extended to older phones, different chargers or unrelated third-party cables without matching documentation.
4. A 67W MacBook Air power source
Apple lists a 67W USB-C power adapter as one fast-charge option for compatible 13.6-inch MacBook Air models. See Apple's Mac fast-charge combinations.
A 60W cable cannot carry the adapter's full 67W rated output. It may still provide useful charging when the Mac accepts a lower level, but it does not reproduce the full cable capacity required for a 67W path. Apple recommends using at least the power rating specified for the best charging experience in its Mac power-adapter guidance.
Microsoft gives similar advice for Surface: a lower-powered USB-C PD charger may charge slowly or not at all, depending on the device. See Microsoft's Surface USB-C charging guidance.
A practical cable-selection checklist
Before choosing a 60W cable, check:
Connectors: Are both the charger and device using USB-C?
Device power: Does the device require no more than 60W and 3A through the cable?
Protocol: Does the charger support the USB PD or PPS profiles required by the device?
Manufacturer instructions: Is a 5A or higher-rated cable specified for the exact setup?
Charger port: On a multi-port charger, what can the individual port provide?
Power sharing: Does connecting another device reduce that port's output?
Data: Is the required transfer speed stated separately?
Video: Is display or Alt Mode support explicitly confirmed?
Multi-port charger labels deserve particular attention. The headline number may be the combined output rather than the power available from every port. Apple notes that a multi-port adapter, computer or hub may reduce the maximum output according to the needs of other connected devices. See Apple's charging-speed guidance.
What to check if charging is slow or intermittent
Work through the setup one component at a time:
Read the output markings for the exact charger port in use.
Confirm that the charger supports the required USB PD or PPS profile.
Check the device manufacturer's recommended charger and cable ratings.
Disconnect other equipment from a multi-port charger.
Allow a hot device to cool naturally on a hard, uncovered surface.
Try a known-good charger and cable that meet the published requirements.
Check the cable and connector housings for fraying, cracks, deformation, looseness or discolouration.
Do not put pins, metal tools, brushes, cleaning liquids or other objects into a USB-C port. If the port appears obstructed or damaged, follow the device manufacturer's service guidance or arrange professional inspection.
Some warmth during charging can be normal. Electrical Safety First advises stopping if a phone or tablet becomes too hot to handle. Stop using equipment showing swelling, smoke, sparks, odd smells, burn marks, buzzing, crackling, exposed conductors or physical damage. Disconnect it only when that can be done safely, and do not dismantle or attempt to repair a mains charger. See its guidance for phones and tablets and USB chargers.
Where the FAYA cable fits
The FAYA USB-C cable is USB-C to USB-C and rated for charging at up to 60W, 20V/3A. Each cable is 2 metres long, with three cables in a pack and a one-year replacement warranty.
It is suitable for assessing charging setups whose required cable capacity stays within 20V/3A. A separately verified data rate, video capability or USB-IF certification has not been supplied, so those features should not be inferred. For warranty help, contact FAYA support.
Frequently asked questions
Can a 60W cable charge a 20W phone?
Yes, when the charger, cable and phone are compatible and undamaged. The 60W rating is a ceiling, not the power forced into the phone. The phone uses a supported level offered by the charger.
Will changing to a 60W cable make charging faster?
Only if the existing cable is the limiting component. It cannot overcome a low-powered charger, a missing PD or PPS profile, the device's input limit, charger power sharing or temperature-related controls.
Can I use a 60W cable with a 100W charger?
Yes, with compliant equipment when the connected device needs no more than the cable's 60W/3A capability. Use a higher-rated cable if the device is intended to receive more than 60W.
Is a 60W cable enough for a laptop?
It depends on the exact laptop. It can suit models designed for 60W or less. A laptop requiring 67W, 90W or more may charge slowly, warn about low power or lose charge during demanding use.
Is 60W the same as 3A?
Amps measure current and watts measure power. A 3A cable carries different wattage at different voltages, reaching 60W only at 20V.
Does a 60W cable support fast data or a monitor?
Not automatically. Data speed and video support require separate specifications. If they are not published for a cable, treat them as unknown rather than assuming they follow from the wattage.
Why might a 45W charging setup specify a 5A cable?
The wattage label alone does not describe every protocol, cable-identification or manufacturer requirement. Samsung, for example, specifies 5A cables for some 45W combinations but documents a 3A exception for certain newer setups. Follow the exact model guidance.
How can I assess a cable's 60W claim?
Look for an identifiable supplier, a precise voltage/current rating, clear warranty support and separate data or video specifications. USB-IF certification should be claimed only when the product is listed and authorised to use the relevant USB-IF marks.