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100W e-marked USB-C cable

100W USB-C Power Delivery is 20V × 5A. Passive USB-C cables top out at 60W (20V/3A); anything above 3A needs an electronic marker (e-marker) rated for 5A. USB-IF labels certified C-to-C cables 60W or 240W — a 60W-marked cable will cap a 100W charger.

Why 100W needs an e-marker

USB Type-C / Power Delivery: a 100W contract is 20 volts at 5 amps. Cables that carry more than 3A must include an electronic marker chip so the charger and laptop negotiate the higher current safely. Without that chip, the link stays in the 3A / 60W class even if the brick is rated 100W.

USB-IF’s cable and connector program requires USB-C to USB-C cables in the certification program to be labeled 60W or 240W (see usb.org/cable_connector, accessed 7 Sep 2026). Shop the label on the cable, not marketing copy that only says “fast charge.”

Apple fast charge and cables

Apple Support 102378 (fast charge your MacBook Air or MacBook Pro) lists a USB-C charge cable or MagSafe 3 cable with the appropriate adapter. For 16-inch MacBook Pro (November 2023 and later), Apple lists the 240W USB-C Charge Cable with the 140W USB-C Power Adapter for fast charge.

Apple’s shop listing for the 240W USB-C Charge Cable (2 m), part MYQT3AM/A, states it supports charging up to 240W. That is a cable, not a charger — pair it with a brick that can deliver the watts you need (see 100W and 140W).

When you need which cable

Facts from manufacturer and standards pages — not a laptop wattage shopping table.

• Need 60W-labeled USB-C to USB-C cable When Charging at or under 60W (20V/3A). Passive / 3A cables are enough for many 30W–65W adapters. Skip for A single-port 100W PD contract — the 60W label caps you at 3A.
• Need 240W-labeled (5A e-marked) USB-C to USB-C cable When 100W or higher USB-C PD (20V/5A and above). USB-IF’s 240W cable class covers 5A e-marked C-to-C. Example Apple 240W USB-C Charge Cable 2 m (MYQT3AM/A) — shop listing supports charging up to 240W.
• Need USB-C to MagSafe 3 cable When MacBook Air / Pro models that charge over MagSafe 3. Apple 102378 pairs MagSafe 3 with the appropriate adapter for fast charge. Vs USB-C charge cable MagSafe 3 is magnetic latch + Mac-side connector. A USB-C charge cable plugs into the Mac’s USB-C / Thunderbolt port. Both can fast-charge when the adapter and cable rating match Apple’s table — see MacBook Pro 16 140W and MacBook Pro 14.
• Related Charger pages Links 100W GaN, 140W, how to pick, MacBook Pro 16 140W, MacBook Pro 14

Prices re-checked 7 Sep 2026

Public cart prices loaded 7 Sep 2026. No third-party cable SKUs invented here.

• Listing Apple 240W USB-C Charge Cable (2 m) MYQT3AM/A Price that day $29.00 Merchant Apple Note Apple shop Add to Bag $29.00. Supports charging up to 240W. Re-checked 7 Sep 2026. Buy at Apple
• Listing Apple USB-C to MagSafe 3 Cable (2 m) Price that day $49.00 Merchant Apple Note Apple shop Add to Bag $49.00. Silver 2 m MagSafe 3 for Mac models that charge over MagSafe 3. Re-checked 7 Sep 2026. Buy at Apple
• Listing 100W GaN charger + e-marked cable context Price that day See /100w/ Merchant Anker / UGREEN / Amazon on the 100W page Note No third-party cable SKU invented here. Pair a 100W brick with a 240W-labeled / 5A e-marked C-to-C cable. Anker Prime 100W (A2688) prices live on the 100W page. Shop 100W chargers

Where to buy

Buy links sit on each price card above (Apple cables; charger context links to /100w/). We may earn a commission if you buy through those links; it does not change the price you pay. See the full disclosure.

No ranking. We do not invent Anker / UGREEN / Amazon cable ASINs or prices on this page. Related: 100W, 140W, how to pick, MacBook Pro 16 140W, MacBook Pro 14.