USB-C PD 3.1 Explained: The 240W Power Delivery Guide
QUICK ANSWER
What is USB-C PD 3.1? USB Power Delivery 3.1 is the latest major revision of the USB-C charging standard. Its headline feature: doubling maximum power from 100W to 240W by adding Extended Power Range (EPR) with 28V, 36V, and 48V voltage levels. This means a single USB-C cable can now charge everything from earbuds to gaming laptops. PD 3.1 is backward compatible — your existing PD 3.0 devices work fine with PD 3.1 chargers, but to access above 100W you need both an EPR-rated charger and an EPR-rated cable.
Table of Contents
1. PD 3.0 vs PD 3.1 vs PD 3.2: Quick Comparison
| Feature | PD 3.0 | PD 3.1 | PD 3.2 |
|---|---|---|---|
| Max Power | 100W | 240W | 240W (same) |
| Voltage Levels | 5V, 9V, 15V, 20V | +28V, 36V, 48V | Same as 3.1 |
| Power Ranges | SPR only | SPR + EPR | Same |
| Adjustable Voltage | PPS (3.3-21V, 20mV steps) | PPS + AVS (15-48V) | AVS refined |
| What It Means | Phones, tablets, ultrabooks | + Gaming laptops, workstations, monitors | Polished version of 3.1 |
PD 3.2 note: PD 3.2 does NOT increase power beyond 240W. It's a protocol refinement that standardizes AVS behavior, improves charger-device negotiation, and fixes edge cases discovered in early PD 3.1 implementations. Think of it as PD 3.1 "polished and production-hardened."
2. SPR vs EPR: The Two Power Ranges
PD 3.1's key innovation is splitting power delivery into two distinct ranges:
SPR — Standard Power Range
Up to 100W (20V × 5A)
Uses the familiar 5V/9V/15V/20V levels from PD 3.0. Fully backward compatible — every PD 3.1 charger supports SPR. Covers phones, tablets, and most ultrabooks.
✅ Standard USB-C cables work (up to 60W)
✅ 5A e-marked cables for 65-100W
EPR — Extended Power Range
100W to 240W (28V/36V/48V × 5A)
The new territory unlocked by PD 3.1. Enables laptop charging at full speed, portable monitor power, and emerging use cases like e-bike and power tool charging over USB-C.
⚠️ Requires EPR-rated charger
⚠️ Requires EPR-rated cable with EPR e-marker
The practical takeaway: SPR handles everything most people need today. EPR is for laptops above 100W and future devices. If your most power-hungry device is a MacBook Air (30-45W) or iPad Pro (20-30W), you may never use EPR — and that's fine. PD 3.1 chargers work perfectly at SPR levels with standard cables.
3. Voltage Levels and What They Power
| Voltage | Max Power (at 5A) | Typical Devices | Range |
|---|---|---|---|
| 5V | 25W | Earbuds, smartwatch, basic phone charging | SPR |
| 9V | 45W | Standard fast charging for smartphones | SPR |
| 15V | 75W | Tablets, small ultrabooks, rapid smartphone charging | SPR |
| 20V | 100W | Most ultrabooks (MacBook Air, Dell XPS 13), tablets | SPR |
| 28V ★ | 140W | MacBook Pro 16", gaming laptops, portable monitors | EPR |
| 36V | 180W | High-performance workstations, docking stations | EPR |
| 48V | 240W | Desktop replacements, e-bikes, power tools, future devices | EPR |
4. Cable Requirements: E-Marker Explained
Your cable matters as much as your charger. Here's what you need at each power level:
| Cable Type | Max Current | Max Power | E-Marker Chip? | Use Case |
|---|---|---|---|---|
| Basic USB-C charge cable | 1.5A or 3A | 60W (20V/3A) | No | Phone charging up to 60W |
| 100W rated (5A) | 5A | 100W (20V/5A) | Yes (standard) | Most laptops up to 100W |
| EPR rated (240W) | 5A | 240W (48V/5A) | Yes (EPR) | Gaming laptops, workstations 100W+ |
The Bottleneck Rule
Your charging speed is limited by the weakest link in the chain: charger → cable → device. A 240W PD 3.1 charger with a basic 3A cable delivers only 60W. A 100W charger with an EPR cable still delivers only 100W. All three components must support the target power level. This is the #1 reason people don't get the charging speed they paid for. For full guidance, see our USB-C PD Fast Charging Guide.
5. PPS vs AVS: Two Kinds of Smart Voltage
PPS (PD 3.0+)
Range: 3.3V – 21V
Step size: 20mV (very fine)
Best for: Smartphones. Samsung Super Fast Charging 45W uses PPS. iPhone fast charging uses PPS. The fine 20mV steps allow precise voltage matching for optimal battery health during fast charging.
AVS (PD 3.1+)
Range: 15V – 48V
Step size: 100mV
Best for: Laptops, monitors, high-power devices. AVS trades PPS's ultra-fine granularity for a much wider voltage range. A laptop battery at different charge levels needs different voltages — AVS provides the right voltage across the entire 15-48V range.
These are complementary, not competing. Many PD 3.1 chargers support both: PPS for phones at lower voltages, AVS for laptops at higher voltages.
6. What Do Your Devices Actually Need?
| Your Device | Max Charging Speed | Protocol Needed | Cable Type |
|---|---|---|---|
| iPhone 15/16 | ~27W | PD 3.0 + PPS | Any USB-C |
| Samsung Galaxy S25 | 45W | PD 3.0 + PPS | 5A e-marked |
| MacBook Air M4 | 30-45W | PD 3.0 | Any USB-C |
| MacBook Pro 14" | 67-96W | PD 3.0 SPR | 5A e-marked |
| MacBook Pro 16" | 140W | PD 3.1 EPR | EPR rated |
| Dell XPS / ThinkPad | 65-100W | PD 3.0 SPR | 5A e-marked |
| Gaming laptop (RTX 5070+) | 140-240W | PD 3.1 EPR | EPR rated |
Bottom line: For most people in 2026, PD 3.0 with a 5A cable is all you need. PD 3.1 EPR only matters if you own a MacBook Pro 16" or a gaming laptop that charges above 100W via USB-C. Don't pay for 240W capability you won't use — but do buy a charger that supports PPS for optimal smartphone fast charging.
More resources: Read our What Is a GaN Charger? Complete Guide to understand why GaN + PD 3.1 is the ideal combination, GaN vs Silicon Charger Comparison for technology trade-offs, and USB-C PD Fast Charging Guide for cable recommendations.
WOWOHCOOL FACTORY STAT
WOWOHCOOL produces GaN chargers with PD 3.1 EPR support up to 240W, paired with EPR-rated 5A USB-C cables for guaranteed full-speed charging. All chargers support PPS + AVS for optimal compatibility across phones, tablets, and laptops. OEM/ODM available with custom branding from 20W to 240W. View our GaN charger product line →
Sourcing PD 3.1 GaN Chargers for Your Brand?
WOWOHCOOL offers factory-direct OEM chargers with PD 3.1 EPR support, matched EPR cables, and custom branding. MOQ from 500 units.
Supply Chain Expert · Wireless Charging Specialist
Nina Nico is a supply chain management expert with 10+ years experience helping global B2B clients source quality GaN chargers from WOWOHCOOL in Shenzhen, China. She holds a degree in International Trade and is a certified supply chain professional (CSCP).