Product Overview
- Type: Thyrite® Metal-Oxide Varistor (MOV) Surge Protective Device
- Rated Voltage: 3.1 kV (as indicated in model number)
- Application Class: Low-voltage protection (IEC 61643-11)
Designed For:
- Protection of sensitive electronic equipment
- Control circuits and instrumentation systems
- Telecommunications and data networks
- Renewable energy systems (solar/wind)
Key Specifications
- Maximum Continuous Operating Voltage (Uc): 3.1 kV AC
- Nominal Discharge Current (In): 10 kA (8/20 μs)
- Protection Level (Up): <1.5 kV (at In)
- Response Time: <25 ns
- Mounting: DIN-rail mounting (35mm)
- Connection: Screw terminals
- Housing: Flame-retardant thermoplastic (UL94 V-0)
Technical Features
- Compact design for space-saving installation
- Visual status indicator for quick condition monitoring
- Thermal disconnector for safe failure mode
- High surge current capacity (up to 40kA 8/20μs)
- Low let-through voltage for optimal equipment protection
Standards Compliance
- IEC 61643-11 (Type 2 SPD)
- UL 1449 4th Edition
- EN 61643-11
Ordering Information
- ABB Article Number: 1SAZ211201R2031
- Order Code: TA25DU-3.1M
- Packaging: Typically sold in individual units
