siemens
Siemens 5TC8 Type 1+2 Surge Protection Device
Model: 5TC8263
4-hour response · Pricing in SAR · Delivery across all KSA regions
5TC8263 — Siemens 5TC8 Type 1+2 Surge Protection Device
The Siemens 5TC8 surge protection device (SPD) provides coordinated Type 1+2 combined protection against direct lightning strike overvoltages and switching transients in low-voltage AC distribution systems up to 400/690 V. The Type 1+2 combined classification under IEC 61643-11 means a single device handles both the high-energy lightning impulse current (Iimp 25 kA per phase) characteristic of external lightning protection system installations and the lower-energy switching surge current (In 20 kA per phase, 8/20 µs) typical of internally generated transients — eliminating the need for a separate Type 1 and Type 2 stage in main distribution boards.
The 5TC8's replaceable varistor modules separate the wearing component from the mechanical housing, allowing field replacement without re-wiring or board isolation in most configurations. Remote fault signalling via a floating change-over contact (rated 0.1 A at 250 V) enables integration into building management systems, generator control panels, and SCADA systems for remote SPD health monitoring — a feature increasingly specified on critical Saudi infrastructure projects where the cost of unmonitored SPD failure and downstream equipment damage is significant. The 5TC8 is available in three-phase TN-S, TN-C-S, and TT system configurations to match Saudi Arabia's common earthing arrangements in industrial and building installations.
In Saudi Arabia, the 5TC8 KSA is essential protection for the Kingdom's industrial facilities in regions with high lightning incidence — particularly the Asir highlands in the southwest, the northern border regions, and coastal areas along the Red Sea and Arabian Gulf. Beyond lightning, the high density of VFD installations in Saudi petrochemical plants, water utilities, and HVAC systems generates frequent switching transients that degrade unprotected PLC, HMI, and instrumentation power supplies. The 5TC8's 1.0 kV voltage protection level (Up) limits residual transient voltage to within the impulse withstand capability of IEC 61000-4-5 Level 4 equipment, protecting sensitive electronics downstream.
Razz Middle East supplies 5TC8 SPDs for new distribution board installations and retrofits, with expert advisory on coordination between Type 1, Type 2, and Type 3 protection levels as required by IEC 62305-4 lightning protection zone design.
Technical Specifications
Full specifications for the 5TC8263
- Classification
- Type 1+2 combined (IEC 61643-11)
- Lightning Impulse
- Iimp 25 kA (10/350 µs) per phase
- Surge Current
- In 20 kA (8/20 µs) per phase
- Voltage Protection Level
- Up ≤1.0 kV
- System Voltage
- Up to 400/690 V AC
- Mounting
- DIN rail 35 mm
- Poles
- 3P + N or 4P
- Remote Signal
- Change-over contact (0.1 A, 250 V)
- Modules
- Replaceable varistor cartridges
- Compliance
- IEC 61643-11, EN 50539-11
Key Features & Benefits
- Type 1+2 combined classification handles both direct lightning impulse current (Iimp 25 kA, 10/350 µs) and switching transients (In 20 kA, 8/20 µs) in a single DIN-rail device, eliminating the need for two separate SPD stages in main distribution boards.
- Replaceable varistor cartridge design separates the wearing element from the permanent mounting base, allowing field replacement of the varistor without re-wiring — reducing maintenance cost and distribution board downtime when SPD elements degrade.
- Remote fault signalling via floating change-over contact integrates SPD health status into building management systems, generator control panels, and SCADA systems, enabling proactive maintenance scheduling before SPD failure leaves equipment unprotected.
- Voltage protection level Up ≤1.0 kV limits residual transient overvoltage to within the IEC 61000-4-5 Level 4 (2 kV) impulse withstand capability of industrial control equipment, protecting PLCs, drives, and instrumentation downstream.
- Available in TN-S, TN-C-S, and TT earthing configurations covers the three predominant LV distribution earthing arrangements used in Saudi Arabia's industrial and building installations, ensuring correct installation in all project types.
- IEC 62305-4 lightning protection zone (LPZ) boundary compliance enables the 5TC8 to serve as the Zone 0B-to-Zone 1 transition SPD when installed at the main distribution board, providing the coordinated surge protection architecture required by SASO earthing standards.
- DIN rail 35 mm mounting and compact 2-module-wide footprint allows the 5TC8 to be installed in any standard DIN rail distribution board without modification to the board layout, even in retrofit projects with limited space.
Industrial Applications in Saudi Arabia
- Main distribution board SPD protection for industrial facilities in Saudi Arabia's Asir highlands and northern regions where lightning density exceeds 4 flashes/km²/year, where Type 1+2 combined protection at the LV incomer is mandatory under IEC 62305-4.
- PLC and VFD cabinet SPD for petrochemical plants in Jubail and Yanbu, where switching transients from large motor start-stop operations on shared MV buses propagate to sensitive SIMATIC S7 control system power supplies.
- Generator output board protection at emergency generator systems in Saudi hospitals, data centres, and telecommunications facilities, where the high transient voltages from diesel generator load-switching events require Type 1 arrester capability.
- HVAC building services distribution board protection in commercial towers across Riyadh and Jeddah, where IEC 62305-4 lightning risk assessment for tall buildings mandates coordinated SPD at each lightning protection zone boundary.
- Outdoor electrical installation protection at SEC substation LV auxiliary power supply boards in coastal areas near Dammam, Al Khobar, and Yanbu, where salt-air humidity increases the probability of secondary arc flashover following lightning-induced transients.
- Water utility pump station distribution board SPD for NWC remote pumping facilities in rural Saudi Arabia, where exposed overhead supply lines are susceptible to direct and induced lightning strokes during seasonal storms.
- Telecommunications tower base station power protection at STC and Zain tower sites across the Kingdom, where lightning exposure of tall steel structures demands coordinated Type 1 protection at every distribution board feeding active equipment.
Industrial Supplier in Saudi Arabia
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Frequently Asked Questions — 5TC8263
Common questions from buyers in Saudi Arabia and the GCC