What Is a Surge Protection Device (SPD)?

A surge protector—also known as a surge protection device (SPD)—is designed to safeguard low-voltage electrical systems against damaging voltage spikes caused by lightning strikes or switching operations. By diverting and absorbing transient overvoltages, SPDs prevent equipment failures, downtime, and safety hazards. Common types include Class I (T1) SPD, Class II (T2) SPD, and combined Class I+II (T1+T2) SPD units.

 

Prosurge Class I+II (T1+T2) DIN-Rail Surge Protector

Prosurge’s VT series—model numbers BP25VT, BP25V, and BPS12.5V—is an IEC 61643-11 certified, TUV SUD approved DIN-rail mount surge protector, ideal for industrial control panels, building entry points, and high-risk zones (LPZ 0–2).

  • VT Technologyfor ultra-low residual voltage
  • High energy absorption: up to 25 kA (10/350 µs) per phase, 100 kA in NPE mode
  • No leakage currentor follow-on current—extends service life
  • Modular design: plug-in replaceable cartridges without shutting down the system
  • Thermal disconnect: automatically isolates a damaged MOV module for added safety

BP25VT Series: Premium Class I+II Surge Protector

  • Standards & Certifications: IEC 61643-11, TUV SUD (1 P/2 P/3 P/4 P)
  • Impulse Current Capability: Iimp = 25 kA (10/350 µs); 100 kA NPE
  • Nominal Discharge Current: In = 25 kA (8/20 µs); 50 kA NPE
  • Short-Circuit Withstand: 50 kArms
  • DIN-Rail Mounting: easy installation, space-saving
  • Thermal Fusing: failsafe protection

 

 

BP25V Series: Dual-Module Redundancy for Uninterrupted Protection

The BP25V design pairs two MOV modules in parallel within each phase. If one module reaches end-of-life, the second continues to protect your system—no downtime required. Visible fault indicators allow you to replace the spent module without interrupting power.

  • Impulse Current: 25 kA (10/350 µs); 100 kA NPE
  • Nominal Discharge: 25 kA (8/20 µs); 50 kA NPE
  • Short-Circuit Rating: 50 kArms
  • Hot-Swap Module: maintain protection while servicing
  • Certifications: IEC 61643-11, TUV SUD

 

 

 

 

BPS12.5V Series: Ultra-Compact 18 mm DIN-Rail SPD

For control panels with limited space, the BPS12.5V delivers full T1+T2 protection in an 18 mm-wide housing. It handles 12.5 kA (10/350 µs) impulse current per phase and 25 kA (8/20 µs) nominal discharge current—perfect for residential, commercial, and renewable energy applications.

  • Impulse Current: 12.5 kA (10/350 µs); 50 kA NPE
  • Nominal Discharge: 25 kA (8/20 µs)
  • Short-Circuit Rating: 50 kArms
  • Slimline Design: only 18 mm wide

Why Choose Prosurge T1+T2 SPD?

  • All-In-One Protection: Class I+II design guards against direct lightning strikes and induced transients.
  • International Compliance: Meets IEC 61643-11 and TUV SUD standards.
  • User-Friendly Modular Design: DIN-rail installation, plug-in cartridges, no-shutdown service.
  • High-Performance MOV Technology: Reliable operation in harsh environments.
  • Versatile Applications: Industrial automation, smart buildings, telecom towers, and photovoltaic inverters.

Contact Us

Build a robust surge protection solution with Prosurge’s Class I+II (T1+T2) DIN-rail SPDs. For detailed datasheets, technical support, or custom system design, reach out to our sales team today.