SPD-20-A280 2P/4P

Surge Protective Device

Introduction

• A solution for protecting electrical and electronic systems (such as cameras, computers, and PLCs) from high-voltage surges and transient overvoltages caused by lightning strikes or sudden voltage spikes.
• The device operates by diverting excessive surge current safely to ground, helping protect equipment, prevent fire hazards, and improve system safety.

Device Classification:

• Type 1: Installed at the main distribution board to withstand direct lightning surge currents.
• Type 2: Installed at sub-distribution panels to protect equipment from transient surges and residual lightning effects.
• Type 3: Installed close to sensitive equipment (electronics, telecommunications devices, etc.) to suppress remaining low-level surge voltages.

Description

• Compact, robust, and aesthetically designed with a plug-in modular structure, compliant with IEC 61643-11 standard.
• Made of high-quality engineering plastic, offering excellent durability, heat resistance, and flame-retardant performance.
• Front status indicator window for easy monitoring (green: normal operation – red: replacement required).
• Helps suppress and limit transient overvoltage surges caused by lightning strikes or electrical switching operations.
• Provides reliable protection for control devices, electrical panels, machinery, and residential or industrial electrical systems.
• Quick DIN rail installation inside electrical panels, allowing easy maintenance and module replacement.

SPD-20-A280/2P

Technical Specifications

• Model: SPD-20-A280
• Type: Type 2
• Poles:
  • 2P (L/N): for single-phase system
  • 4P (L1/L2/L3/N): for three-phase system
• Max. Continuous Operating Voltage (Uc): 280V AC
• Nominal Discharge Current (In): 20kA
• Maximum Discharge Current (Imax): 40kA
• Protection Voltage Level (Up): ≤ 1.3kV
• Frequency: 50/60Hz
• Protection Degree: IP20
• Back-up fuse: 63A ~ 100A

Applications:

• Protection for sensitive electronic equipment.
• Residential electrical panels and distribution boards (DB).
• Industrial control panels.
• Electrical systems in factories, offices, and commercial buildings.

Structure:

• Surge Protection Module (SPD Module):
  Designed to absorb transient surge voltages caused by lightning or switching operations.
  Featuring a pluggable and replaceable design, the module can be quickly replaced at the end of its service life without disconnecting wiring from the base.
• Plug-in Base (SPD Base):
  Mounted directly onto a DIN rail inside the electrical panel, providing secure mechanical support and electrical connection for the SPD module.
  The base includes wiring terminals for 2P (L/N) or 4P (L1, L2, L3, N) configurations, along with a PE grounding terminal located at the bottom.
• Advantages:
  Quick replacement of damaged or end-of-life SPD modules without removing wiring inside the electrical panel.
  Reduced maintenance time and easier servicing.
  Wiring terminals available for L, N (2P) or L1, L2, L3, N (4P) connections.

Circuit diagram:

Wiring diagram:

Resources & Support

• Technical document: [English] [Vietnamese]