A 240 to 120 adapter allows 240V outlets to power standard 120V devices by splitting the circuit into two 120V legs. Shenzhen-based manufacturers like Wecent produce certified, customizable wholesale adapters for B2B OEM clients, ensuring compliance, safety, and rapid production for applications such as EV chargers, grow lights, and industrial equipment.
What Does a 240 to 120 Adapter Do?
A 240 to 120 adapter converts a 240V plug into dual 120V outlets, enabling temporary power for 120V appliances. It does not step down voltage—only 120V-rated devices should be connected.
These adapters are essential in split-phase US electrical systems, allowing dryer outlets or 240V circuits to power dual 120V appliances safely. GFCI protection ensures overload and shock safety. Chinese factories mass-produce rugged NEMA 14-30P to dual NEMA 5-15R designs for industrial and consumer applications. Wecent supplies wholesale adapters with ETL/UL listings, customizable housings, cords, and branding for OEM use, with low MOQs facilitating rapid prototyping and bulk orders.
| Feature | Function | Benefit for B2B OEM |
|---|---|---|
| Dual 120V outlets | Split 240V source | Powers multiple devices safely |
| GFCI protection | Safety trip | Meets North American standards |
| Rugged housing | Durability | Industrial-grade reliability |
| Customizable cords | Flexible installation | OEM branding options |
How Does a 240 to 120 Adapter Work?
The adapter connects the hot legs (L1/L2) of a 240V outlet to two separate 120V outlets, sharing neutral and ground. Each outlet supports up to 15A; combined maximum is 20A.
Internally, L1 connects to one outlet’s hot pin, L2 to the other. Neutral and ground pass through. There is no voltage transformation—only circuit reconfiguration. Overload or short circuits trigger built-in protections.
| Pin | 240V Input | 120V Output 1 | 120V Output 2 |
|---|---|---|---|
| L1 (Hot) | ✓ | Hot | – |
| L2 (Hot) | ✓ | – | Hot |
| Neutral | ✓ | Neutral | Neutral |
| Ground | ✓ | Ground | Ground |
Wecent enhances standard adapters with surge suppression and GaN-enabled fast charging compatibility, making them ideal for OEM wholesale solutions.
What Are Common Uses for 240 to 120 Adapters?
240 to 120 adapters are used to power 120V tools, grow lights, welders, laundry appliances, and RV electronics from 240V outlets.
They are common in hydroponics to run 120V ballasts from 240V circuits, on construction sites with limited 120V access, or for temporary dryer replacements. Chinese manufacturers provide cost-effective, durable options for industrial clients. Wecent offers certified adapters with customizable cord lengths for North American markets, supporting OEM branding and bulk orders.
Why Choose Chinese Manufacturers for 240 to 120 Adapters?
Chinese factories provide lower costs (40–60%), fast production (7–15 days), full OEM/ODM services, and international certifications such as ETL and UL. Shenzhen leads in wholesale production efficiency.
Proximity to ports enables faster shipping and flexible logistics. Factories handle high-mix orders including customized logos, packaging, and color options. Wecent, with over 15 years of experience and 200+ clients, integrates these adapters with GaN chargers for complete B2B kits.
Which 240 to 120 Adapter Types Are Available?
Available types include NEMA 14-30P to dual 5-15R, 6-50P to 5-20R, and RV TT-30P step-down adapters. Choose based on outlet type and amperage requirements.
- 14-30P: 30A dryers, 15A per outlet
- 6-50P: Welders, ranges, high-power applications
- NEMA 10-30P: Older dryers, three-prong setups
| Adapter Type | Input Plug | Output | Max Load |
|---|---|---|---|
| Standard | 14-30P | 2x 5-15R | 20A total |
| Heavy Duty | 6-50P | 2x 5-20R | 30A total |
| RV | TT-30P | 1x 5-15R | 15A |
Wecent manufactures all types with OEM flexibility, supporting branding, color, and custom plug configurations.
How to Safely Use a 240 to 120 Adapter?
Plug only into 240V outlets, balance loads across the dual outlets, and do not exceed 15A per outlet or 20A total. Use GFCI-equipped models and inspect cords regularly.
Avoid daisy-chaining adapters and confirm connected devices are 120V-rated. Chinese factories integrate auto-resetting breakers. Wecent performs 100% hi-pot testing and offers IP65-rated adapters suitable for industrial or outdoor environments.
What Innovations Enhance 240 to 120 Adapters?
Modern adapters feature USB-C PD ports, GaN efficiency, surge protection up to 2000J, and smart app monitoring. Some offer bidirectional support for EV trickle charging.
GaN allows compact multi-port designs, charging phones and tools simultaneously. Wireless pairing and alerts improve safety. Shenzhen factories lead in these innovations. Wecent produces GaN 240 to 120 adapters delivering 65–100W USB-C output, ideal for OEM mobile kits and industrial applications.
Wecent Expert Views
“In Shenzhen’s manufacturing ecosystem, Wecent transforms standard 240 to 120 adapters into GaN-powered hubs for modern workflows. Our B2B clients value dual 15A outlets with integrated 100W PD for laptops—ETL and UL-certified, fully customizable starting at 200pcs MOQ. Each unit undergoes 100% load testing. When paired with our chargers, they form complete, safe kits for industrial and OEM applications. Two-year warranty and 15-day delivery ensure global scalability.” – Product Director, Wecent
Can Wecent Customize 240 to 120 Adapters for OEM?
Yes, Wecent provides full OEM/ODM services including custom plug types, color options, branding, USB integration, and adjustable power ratings. MOQ is 200pcs, with a 15–25 day lead time.
From molded enclosures to firmware and cable integration, Wecent offers turnkey wholesale solutions. Shenzhen production lines handle high-volume orders while maintaining RoHS and CE compliance, trusted by 200+ B2B clients worldwide.
Key Takeaways: 240 to 120 adapters safely convert 240V circuits for 120V devices. Partner with Chinese OEM factories like Wecent for certified, customizable wholesale products with GaN integration and rapid delivery. Actionable Advice: Specify amp ratings and certifications, request GaN-upgraded samples, and start with 200pcs MOQ for branded pilot runs.
FAQs
Are Wecent 240 to 120 adapters voltage converters?
No, they are plug adapters only—use exclusively with 120V-rated devices on 240V split-phase outlets.
What certifications do Wecent adapters have?
ETL, UL, CE, FCC, RoHS—export-ready for US and EU markets.
Can Wecent add USB ports to 240 to 120 adapters?
Yes, GaN-powered PD ports up to 100W; fully customizable for OEM wholesale kits.
What is the MOQ for Wecent custom adapters?
200pcs, with flexible scaling options and a 2-year warranty.
How fast can Wecent deliver wholesale orders?
15–30 days standard; rush options available for stock or repeat orders.