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Schneider A9L16482: Acti9 iPRD1 12.5r 3P+N Surge Protective Device
A9L16482 is a Type 1+2 combined surge protective device (SPD) from Schneider Electric’s Acti9 series, specially designed for 3P+N three‑phase four‑wire systems. It provides comprehensive lightning and surge protection with remote signaling function, suitable for power input points of residential and small commercial buildings.
- Core Parameters Summary
| Item | Specification |
| Model | A9L16482 (Acti9 iPRD1 12.5r) |
| Protection Type | Type 1+2 combined SPD (protects against direct and indirect lightning strikes) |
| Pole Configuration | 3P+N (3 phases + neutral) |
| Rated Voltage (Uc) | 350V AC (phase‑to‑phase), 255V AC (neutral‑to‑earth) |
| Maximum Discharge Current (Imax) | 50kA (8/20μs waveform) |
| Voltage Protection Level (Up) | 1.5kV (phase‑to‑phase), 1kV (neutral‑to‑earth) |
| Technology | MOV (Metal Oxide Varistor) + GDT (Gas Discharge Tube) hybrid technology |
| Dimensions | 4 modules wide (72mm), height 89mm, depth 69mm |
| Weight | 0.649 kg |
| Wiring Capacity | Solid wire 10–35mm², stranded wire 10–25mm² |
| Earthing System | Compatible with TN‑S and TT systems |
| Remote Function | With remote signaling contacts, connectable to monitoring systems |
- Technical Features
- Integrated Type 1+2 Protection
No need for an extra Type 1 SPD; one unit provides full lightning protection
Suitable for installation in the main distribution board at the building incomer as the first level of surge protection
- Hybrid Protection Technology
GDT: Handles high‑energy direct lightning strikes, with high insulation resistance and low leakage current
MOV: Fast response to induced lightning and switching overvoltages for fine protection
Combined to achieve a wide range of surge current absorption capacity
- Remote Monitoring Function
Built‑in status monitoring circuit, outputs operating status via remote signaling contacts
Connectable to PLC or building automation systems for real‑time SPD status monitoring
Automatically sends alarm signals in case of failure for timely maintenance and replacement
- Safety Design
Overcurrent protection to prevent overheating in case of SPD failure
Mechanical status indicator window for clear normal/fault indication
Complies with IEC 61643‑11 and EN 61643‑11
- Applications & Installation Recommendations
Recommended Applications
Main distribution boards of residential and small commercial buildings (as first‑level protection)
Power distribution systems near the power input
Intelligent building systems requiring remote monitoring of surge protection status
Three‑phase four‑wire distribution networks with TN‑S and TT earthing systems
Installation Notes
- Install after a 3P+N circuit breaker, close to the power input
- Connecting cables should be as short and straight as possible (≤50cm recommended) to reduce inductive effects
- Use copper conductor ≥16mm² for earthing; earthing resistance shall comply with local regulations
- Remote signaling contacts can be connected to DC 24V or AC 230V monitoring circuits
- Cooperate with downstream SPDs (Type 2/3) to form a multi‑level protection system
- Selection & Replacement Information
Selection Criteria
System voltage: 350V AC suitable for 400V systems (phase‑to‑phase voltage)
Expected surge current: 50kA suitable for most building power incomers
Earthing system: confirm TN‑S or TT
Monitoring requirement: whether remote status monitoring is needed
Replacement Models
| Model | Main Difference | Application |
| A9L16481 | Without remote signaling | Basic protection without monitoring |
| A9L16483 | Higher rated current | Higher‑power distribution systems |
| A9L16484 | Different protection level | Applications with special accuracy requirements |
- Maintenance & Warranty
Warranty period: 18 months
Regularly check the status indicator (green = normal, red = fault)
Inspection and recording are recommended after the SPD operates (even if not damaged)
Replace immediately in case of failure to avoid loss of protection
