Schneider A9L16482 Surge Protection Device (SPD)

Product Basic Positioning

Schneider A9L16482 is a Type 1+2 combined surge protection device (SPD) belonging to the Acti9 iPRD1 series, with the full model name Acti9 iPRD1 12.5r 3P+N 350V with remote signal transmission. It is used for primary and secondary overvoltage protection in low-voltage distribution systems, and can simultaneously protect against transient overvoltages caused by direct and indirect lightning strikes.

2.  Core Technical Parameters

3.  Core Product Features
4.  Integrated Type 1+2 Protection: No need for additional Type 1 SPD configuration; a single device provides two-level protection, simplifying distribution design and installation.
5.  Self-protection Design: Built-in dedicated circuit breaker avoids line short-circuit risks caused by SPD faults, improving system safety.
6.  Remote Monitoring Function: Equipped with “replacement required” signal output, which can be connected to Building Automation System (BAS) or distribution monitoring system to realize real-time fault early warning.
7.  Modular Plug-in Design: Damaged pluggable protection modules can be replaced quickly, allowing maintenance without power outage and reducing system downtime.
8.  High-performance Protection: MOV+GDT combined technology provides low residual voltage (1.5kV) and high current-carrying capacity (50kA) to ensure equipment safety.
9.  High Reliability: Complies with IEC 61643-11 standard, guaranteed by Schneider original quality, with a warranty period of 18-24 months.
10.  Typical Application Scenarios
11.  Incoming Cabinet of Residential and Commercial Buildings: Especially recommended for the main incoming distribution cabinet in high-risk areas as the first-level + second-level surge protection for household access.
12.  Distribution System of Small and Medium-sized Factories: Provides basic surge protection for production lines and precision equipment to prevent key equipment damage caused by lightning strikes.
13.  Data Centers and Computer Rooms: Serves as surge protection for UPS front-end or rack-mounted distribution cabinets, protecting sensitive electronic equipment such as servers and network devices.
14.  Medical Facilities: Provides reliable overvoltage protection for medical equipment, meeting the electrical safety requirements of medical sites.
15.  New Energy Systems: Suitable for grid-connected cabinets of distributed photovoltaic and small wind power systems, protecting core equipment such as inverters.
16.  Installation and Selection Notes
17.  Installation Location: It is recommended to install at the incoming end of the distribution system, close to the main switch, to maximize the protection range.
18.  Cooperative Protection: Although it has a built-in circuit breaker, it is recommended to install a 16-25A miniature circuit breaker at the front end as backup protection to improve selectivity.
19.  Cable Requirements: The connecting cable should be as short as possible (≤50cm), using copper conductors with a cross-sectional area of not less than 16mm² to reduce line impedance.
20.  Earthing Requirements: The PE wire connection must be reliable, and the earthing resistance should comply with relevant specifications (≤4Ω) to ensure rapid discharge of surge current.
21.  Replacement Reminder: When the remote signal alarms or the panel indicator light turns red, the protection module should be replaced in a timely manner to restore the protection function.
22.  System Compatibility: Only applicable to 400V AC three-phase systems; the maximum continuous operating voltage of 350V ensures stable operation in environments with voltage fluctuations.
23.  Alternative and Complementary Models

Same-series Alternatives: A9L16282 (iPRD1 25r, Imax=100kA), A9L16382 (iPRD1 6.5r, Imax=25kA)

Version without Remote Signal: A9L16480 (iPRD1 12.5, no remote signal)

Upgraded Models: Acti9 iPRD2 series (higher current-carrying capacity, intelligent monitoring function)

Cross-brand Replacement Comparison Table for Schneider A9L16482 Surge Protection Device

Core parameters of Schneider A9L16482: Type 1+2 combined SPD, 3P+N, Imax=50kA(8/20μs), Iimp=12.5kA(10/350μs), Uc=350V, Up=1.5kV, with remote signal transmission, MOV+GDT protection technology, drawer-type module, 4-module width(72mm). The following are the corresponding replacement models of major mainstream brands and key matching points:

1.  Core Replacement Model Comparison Table

2.  Detailed Description of Replacement Models of Various Brands

2.1 ABB Replacement Solution

Preferred Model: OVR T1-T2 3N 12.5-350s P QS TS

Protection Class: Type 1+2, meeting both Class I (10/350μs) and Class II (8/20μs) tests

Core Parameters: Imax=50kA, Iimp=12.5kA, Uc=350V, Up=1.5kV, fully matching A9L16482

Installation: 4-module width (72mm), DIN rail mounting, plug-in design for convenient maintenance

Remote Function: The “TS” configuration provides fault alarm contacts that can be connected to the building automation system

2.2 Siemens Replacement Solution

Preferred Model: 5SD7414-3 (5SD74 T1/T2 12.5/50kA 335V 3P+N RSC)

Technical Features: MOV+GDT combined protection, consistent with the technology of Schneider A9L16482

Dimensions: 4-module width (72mm), fully compatible with A9L16482 without modifying the cabinet layout

Remote Signal: The RSC version comes standard with remote signal contacts, which automatically close when a fault occurs and can drive indicator lights or alarm systems

Note: Uc=335V (slightly lower than 350V), suitable for standard 400V systems, not recommended for occasions with large voltage fluctuations

2.3 Chint Replacement Solution

Preferred Model: NU5-Ⅰ+Ⅱ-12.5/50 3P+N/F (NXU-Ⅰ+Ⅱ-12.5/50 3P+N/Y of Kunlun series)

Design Features: Integrated T1+T2 protection, no need for additional primary SPD configuration

Key Parameters: Imax=50kA, Iimp=12.5kA, Up=1.5kV, meeting the protection requirements of A9L16482

Difference: Uc=385V (slightly higher than 350V), with stronger adaptability, suitable for systems with large voltage fluctuations

Remote Function: The suffixes “/F” and “/Y” indicate with remote fault alarm contacts, contact capacity: AC 250V/5A, DC 30V/1A

2.4 Phoenix Contact Replacement Solution

Preferred Model: VAL-MS-T1/T2 335/12.5/3+1-FM (Order No.: 2800183)

Technical Advantage: Hot-swappable design, modules can be replaced with power on when a fault occurs, reducing system downtime

Core Parameters: Imax=50kA, Iimp=12.5kA, Uc=335V, Up=1.5kV, consistent with A9L16482

Remote Function: The FM version comes standard with remote indication contacts, whose state changes when a fault occurs, contact type: NO/NC optional

Applicable System: 5-wire system (L1-L3, N, PE), with good compatibility with the TN-S/TT system of A9L16482

3.  Key Replacement Notes

4.  Recommended Replacement Solutions
5.  Same-brand Replacement: Schneider A9L16480 (without remote signal) or A9L16634 (iPRF1 series), fully compatible without adjusting the installation space and control system
6.  International Brand Upgrade: ABB OVR T1-T2 3N 12.5-350s P QS TS or Siemens 5SD7414-3, with reliable quality and complete remote functions, suitable for important projects
7.  Cost-effective Domestic Alternative: Chint NU5-Ⅰ+Ⅱ-12.5/50 3P+N/F or Delixi CDYU-I+II-12.5/50 3P+N/Y, priced at about 60%-70% of international brands, with performance meeting requirements
8.  Technology Upgrade Solution: Phoenix Contact VAL-MS-T1/T2 335/12.5/3+1-FM, with plug-in design for more convenient maintenance and more complete remote monitoring functions, suitable for key scenarios such as data centers
9.  Quick Selection Suggestions
10.  General Projects: Choose domestic alternatives (Chint/Delixi) for the highest cost performance and satisfactory performance
11.  Important Projects: Choose products of the same series from ABB/Siemens/Schneider for higher reliability and complete remote functions
12.  Maintenance Convenience Priority: Choose plug-in design (such as Phoenix Contact VAL-MS series, ABB OVR series) for quick module replacement in case of faults and reduced downtime