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Below are Type 1+2 combined surge protective devices from major electrical brands that match the performance parameters of Schneider A9L16482 (Acti9 iPRD1 12.5r 3P+N). All are suitable for 3P+N three‑phase four‑wire systems, equipped with remote signaling, and can be used as direct replacements or functionally equivalent solutions.
Core Matching Parameters (Schneider A9L16482)
| Item | Specification |
| Protection Type | Type 1+2 Combined (Protection against direct & indirect lightning) |
| Pole Configuration | 3P+N (3 Phases + Neutral) |
| Impulse Current (Iimp, 10/350μs) | 12.5kA |
| Max. Discharge Current (Imax, 8/20μs) | 50kA |
| Rated Voltage (Uc) | 350V AC (phase‑to‑phase), 255V AC (neutral‑to‑earth) |
| Voltage Protection Level (Up) | 1.5kV (phase‑to‑phase), 1kV (neutral‑to‑earth) |
| Remote Function | With remote signaling contacts |
| Installation Width | 4 modules (72mm) |
| Technology | MOV + GDT hybrid |
| Earthing System | Compatible with TN‑S and TT systems |
Equivalent Models & Parameter Comparison by Brand
- ABB Equivalent
| Model | Key Parameters | Difference from Reference | Application |
| OVR ZP T1-T2 3N 12.5-255 (2CTB815799R1300) | • Type 1+2 | Uc = 255V (neutral‑to‑earth of reference); phase‑to‑phase protection to be confirmed | Main switchboards in residential & commercial buildings; direct interchange with Schneider |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=255V | |||
| • Up=1.5kV | |||
| • With remote signaling | |||
| OVR ZP+ 3N 12.5-255 (2CTB815799R1900) | • Type 1+2+3 protection | Extra Type 3 protection, more comprehensive | Smart buildings with high surge protection requirements; no additional downstream SPD needed |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=255V | |||
| • 4 modules |
- Siemens Equivalent
| Model | Key Parameters | Difference from Reference | Application |
| 5SD7414-2RC | • Type 1+2 | Fully matches core parameters; standard Siemens 5SD74 model | Industrial & commercial buildings; compatible with Siemens distribution systems |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=350V | |||
| • Up=1.5kV | |||
| • With remote status contacts (RSC) | |||
| 5SD74141RC | • Type 1+2 | Uc and Up slightly higher; suitable for unstable voltage grids | Building distribution in areas with unstable power supply |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=385V | |||
| • Up=1.8kV | |||
| • Remote signaling |
- CHINT Equivalent
| Model | Key Parameters | Difference from Reference | Application |
| NXU-Ⅰ+Ⅱ 12.5/385 3P+N | • Type 1+2 | Uc and Up slightly higher; better price | Budget‑sensitive residential & small commercial projects |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=385V | |||
| • Up=1.8kV | |||
| • Optional remote signaling module | |||
| NU5-Ⅰ+Ⅱ 12.5/385 3P+N | • Type 1+2 | Higher Imax, stronger protection | Industrial plants, large commercial complexes |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=65kA | |||
| • Uc=385V | |||
| • Up=2kV | |||
| • Remote monitoring |
- Delixi Equivalent
| Model | Key Parameters | Difference from Reference | Application |
| CDYN-I+II 12.5/350 3P+N | • Type 1+2 | Fully matches core parameters; Delixi premium series | Projects with mixed Schneider systems |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=350V | |||
| • Up=1.5kV | |||
| • Remote signaling output | |||
| CDYE-I+II 12.5/385 3P+N | • Type 1+2 | Added local alarm for on‑site inspection | Unmanned power distribution areas |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=385V | |||
| • Up=1.8kV | |||
| • Audible‑visual alarm + remote signaling |
- Other International Brands
| Brand | Model | Key Parameters | Advantages |
| Phoenix Contact | VAL-MS 3P+N PE 12.5 350V | • Type 1+2 | Modular design, hot‑swap, easy maintenance |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=350V | |||
| • Up=1.5kV | |||
| DEHN | DS254 3P+N 12.5-350 | • Type 1+2 | Made in Germany, IP20, long service life |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=350V | |||
| • Up=1.5kV | |||
| Legrand | P1+P2 3P+N 12.5 350V | • Type 1+2 | Perfect compatibility with Legrand enclosures, easy installation |
| • 3P+N | |||
| • Iimp=12.5kA | |||
| • Imax=50kA | |||
| • Uc=350V | |||
| • Up=1.5kV |
Key Considerations for Replacement Selection
- Parameter Matching Priority: Ensure the four core parameters Iimp, Imax, Uc, Up match system requirements, as they directly affect surge protection performance and equipment safety.
- Remote Function Compatibility: Verify remote contact type (dry/wet) and operating voltage (DC 24V / AC 230V) match the existing monitoring system.
- Installation Size: 4 modules (72mm) is standard for most brands, but confirm actual space.
- Earthing Compatibility: Ensure the model supports the on‑site earthing system (TN‑S / TT / TN‑C‑S).
- Price & Warranty: Chinese brands (CHINT, Delixi) are typically 20–40% lower, with 1–2 year warranty; international brands usually offer 2–5 years.
Selection Recommendations
Direct Replacement:
ABB OVR ZP T1-T2 3N 12.5-255, Siemens 5SD7414-2RC, Delixi CDYN-I+II 12.5/350 3P+N fully match Schneider A9L16482 and can be interchanged directly.
Performance Upgrade:
Choose CHINT NU5 series (Imax 65kA) or ABB OVR ZP+ series (Type 1+2+3) for higher protection level.
Cost Optimization:
Chinese brands (CHINT NXU, Delixi CDYE) significantly reduce cost while meeting basic protection needs.
