Basic Over & Under Voltage Protector Manufacturer
Soltree’s basic over and under voltage protectors keep your electrical system safe, designed for simple and reliable protection. We offer cost-effective, secure, and durable solutions for long-lasting electrical safety.
- Factory Direct – Competitive pricing
- Simple & Reliable – Essential voltage protection
- Indicator Light Status – Clear protection display at a glance
Basic Over & Under Voltage Protector
Reliable miniature circuit breakers for safe and efficient power protection.
Model:STBVP-F 1P+N
- Single-phase protection
- Prevents overload & voltage
- Easy to install for home use
Model:STBVP-Y 2P
- Dual-pole protection
- Secures phase + neutral lines
- Reliable for residential & office
Model:STBVP-F 3P+N
- Three-phase protection
- Stable under high loads
- Trusted for industrial applications
Model:STBVP-Y 4P
- Four-pole protection
- Covers 3-phase + neutral lines
- est choice for heavy-duty
Soltree – Trusted Over & Under Voltage Protector Manufacturer
Work with a trusted Chinese factory for reliable over/under voltage protectors at factory prices — save up to 30%.
About Soltree
That’s Soltree: High Quality, Better Price
Soltree has been making low-voltage electrical products for more than 15 years. They are experts at making reliable over/under voltage protectors that keep equipment safe from unstable power circumstances. Our facility is 100,000 square meters and has more than 200 talented people, which means we can make a lot of products, keep prices low, and keep quality high. Every device is made to meet international standards, tested for strength, and comes with full OEM/ODM support.
Soltree – Reliable Over/Under Voltage Solutions
Global-Ready, Trusted by Professionals
Soltree makes high-tech gadgets that safeguard homes, businesses, and factories against overvoltage and undervoltage. We promise protection that makes equipment last longer and cuts down on downtime by using the latest technologies and thorough quality control. More than 50 nations trust our solutions and they are certified (CE, RoHS, ISO). We help partners all around the world make installation easier, improve safety, and construct smarter power distribution systems by making production more efficient and allowing for flexible customization.
Why Choose Soltree Voltage Protectors
Smart technology, strong production, and export-ready service.
Reliable Quality & Long Lifespan
Our protectors are made with flame-retardant materials, advanced components, and strict quality control, ensuring stable performance and long service life for residential, commercial, and industrial applications.
Easy Installation & Operation
The small size and ability to install on a DIN rail make it easy and quick to set up, and it may be used at home or in a business.
Factory Direct, Lower Cost
We manufacture in-house with 100,000㎡ of factory space, cutting out middlemen to offer you lower prices and full customization (OEM/ODM) options.
Built for Global Export
Certified products (CE, RoHS, etc.), multilingual support, and experience shipping to over 50+ countries. We understand your market needs and compliance standards.
Customization That Builds Your Brand
Logo, packaging, product design, and distributor support — everything can be tailored to help your business stand out.
Logo & Branding
Custom logos, labels, and product copywriting to strengthen your brand identity.
Packaging Options
Retail boxes, bulk packaging, and private label designs tailored to your sales channels.
Product Design & Development
From new specifications to complete ODM projects, we bring your product ideas to life.
Distributor Materials
Customized brochures, manuals, and marketing assets to support your sales network.
1. What Is an Over & Under Voltage Protector?
What happens when the power supply is unstable? Voltage spikes and drops don’t just interrupt your daily life — they can shorten the lifespan of appliances and lead to costly repairs or replacements.
Over & Under Voltage Protector
Protecting Your Power, Protecting Your Devices
An over & under voltage protector is designed to safeguard your electrical system against the harmful effects of unstable power supply. When voltage rises above or falls below safe levels, the device automatically disconnects the circuit, preventing overheating, malfunction, or permanent damage to appliances. With its compact design and simple installation on a DIN rail, it offers a cost-effective yet highly reliable protection solution. Widely used in homes, offices, and industrial facilities, it helps extend the lifespan of electrical equipment, reduces maintenance costs, and ensures uninterrupted daily operation.
2. Key Functions of Over & Under Voltage Protector
The basic over & under voltage protector comes with complete protection features, giving you peace of mind in every use.
- Auto Reset:
When voltage or current returns to safe range, power is restored automatically without manual intervention.
- Over & Under voltage Protection:
Automatically disconnects power when voltage is too high or too low, restoring safely once levels normalize.
- Heat & Cold Resistant:
Built with durable materials, ensuring stable performance whether in hot summers or cold winters.
- Indicator Light:
Clear LED indicators provide real-time status of power and protection, making it easy to monitor operation at a glance.
3. Auto Reset On Voltage Recovery
Enjoy hassle-free protection — power reconnects automatically when voltage stabilizes, keeping your devices safe at all times.
Smart Voltage Reset Function
When the voltage becomes excessively high or drops too low, the over & under voltage protector instantly disconnects the power to prevent damage to connected equipment. Unlike traditional devices that require manual resetting, this protector continuously monitors the line voltage and automatically restores power once it returns to a safe range. This intelligent function not only saves time and effort but also ensures uninterrupted operation for your home, office, or industrial systems.
- Recovery Time: 30 seconds
- Overvoltage Protection: ≥ 275V
- Undervoltage Protection: ≤ 161V
4. Compare Our Basic Voltage Protectors
Choose the right model for your business needs.
| Item | STBVP-F | STBVP-Y |
|---|---|---|
| Neutral Line Disconnection Protection | No | Yes, safer |
| Price | More economical | Higher priced |
| Overvoltage Protection | Yes | Yes |
| Undervoltage Protection | Yes | Yes |
| Indicator Light | Yes | Yes |
| Automatic Reset after Voltage Recovery | Yes | Yes |
5. Heat & Cold Resistant
Designed to perform stably in both extreme heat and freezing cold, ensuring uninterrupted protection year-round.
Wide Temperature Adaptability
Built with high-quality, durable materials, the protector maintains consistent performance across a wide range of temperatures. Whether it’s the scorching heat of summer or the freezing chill of winter, it ensures your electrical system remains safe, stable, and reliable without performance loss. The robust design effectively resists temperature-related stress and guarantees long-lasting operation even in challenging conditions. This makes it ideal for use in diverse environments, from everyday households to demanding industrial applications.
- High Temperature: Up to 40℃
- Low Temperature: Down to -5℃
6. Flame-retardant design, safer protection
Engineered with flame-retardant materials, this protector offers enhanced safety and peace of mind.
Reliable Flame-Retardant Protection
The protector is built using high-quality flame-retardant materials that effectively resist ignition and slow down the spread of fire in case of accidents. This ensures not only a higher level of electrical safety but also longer product durability, making it reliable for both residential and industrial environments. By combining safety and performance, it provides comprehensive protection for your electrical system.
7. Space-saving and simple to install
Space-saving design makes installation simpler and more flexible, allowing the protector to fit easily into different electrical setups.
Compact size, easy to install
Designed with a compact structure, this protector saves space while ensuring reliable performance. Its standard 35mm DIN rail mounting makes installation quick and hassle-free, whether at home or in industrial settings. What’s more, it can be seamlessly combined with other Soltree low-voltage devices such as circuit breakers and residual current protectors, creating a flexible and efficient protection system tailored to your needs.
What Our Customers Say
Trusted by global clients in residential, commercial, and industrial sectors.
Get Free Samples
Have questions about our products or need assistance with a project? Our team is ready to help you find the perfect electrical solution.
Mail Address
jacky@cnsoltree.com
Phone/Whatsapp
+86 15658672325
Headquarters
Fenghuang Industrial Zone,BaishiTown,Yueqing Zhejiang P.R. China
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