Transient overvoltage surge protective device (Type 1/2 SPD) for main and distribution panels, single-phase or three-phase.
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An SPD diverts transient overvoltage surges to ground, per IEC 61643-11. Type 1 is tested with a 10/350 µs impulse current wave (direct lightning component, main board); Type 2 with an 8/20 µs wave (induced surges, distribution boards). It is selected by In, Imax and protection level Up.
The SPD surge protective device is a device used to divert transient voltage events to ground/earth that can affect VFDs, power supplies, PLCs, instrumentation, lighting, control equipment and electronic loads inside industrial installations. It does not replace a thermal-magnetic breaker or a main breaker: its function is not to open on overload, but to limit the effect of electrical spikes through a controlled path to the grounding/earthing system. To select an SPD, the network type, location inside the panel, exposure to lightning events, coordination with upstream protections, protection level required for the equipment and actual condition of the grounding/earthing system are reviewed. TECTUL quotes it for main panels, subpanels and control systems where the goal is to reduce failures due to transient overvoltages, following low-voltage installation criteria, RETIE and NTC 2050.
We dispatch to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp for your SPD indicating network type, installation panel, equipment to protect and grounding/earthing conditions.
| Type | Test wave | Location |
|---|---|---|
| Type 1 | Iimp with 10/350 µs wave | Service entrance of buildings with direct lightning exposure |
| Type 2 | In with 8/20 µs wave — typical commercial values In 20 kA, Imax 40 kA | Main and distribution boards |
| Type 3 | Combination wave 1.2/50 µs – 8/20 µs | Close to sensitive end equipment |
Test classification per IEC 61643-11. The SPD's protection level Up must be lower than the impulse withstand voltage of the protected equipment, and the earthing connection must be as short as possible.
The typical maximum continuous operating voltage Uc of an SPD for 220 V phase-to-neutral networks is 275 V per pole, and the usual protection level Up stays below 1.5 kV to safeguard electronic equipment (catalogs per IEC 61643-11).
The price is quoted via WhatsApp because it depends on SPD type, electrical network, panel configuration, required modules and requested protection level.
No. The SPD protects against transient overvoltages; the DIN rail breaker protects against overload and short circuit in branch circuits.
It can be installed in the main panel, subpanel or near sensitive loads, according to the project protection coordination and overvoltage risk.
Yes. SPD effectiveness depends on suitable grounding/earthing and short, firm connections sized correctly by the electrical designer.
It must be mounted according to its format, normally with connection to phases, neutral if applicable and ground/earth bar, respecting the backup protection defined for the panel.
Yes, it can be part of the protection for VFDs, PLCs and industrial electronics, provided it is selected and coordinated with the actual electrical system.
In the main or distribution board, downstream of the main breaker, with short leads to phase and earth bars so the protection level Up is not degraded.
RETIE (Resolution 40117 of 2024) includes transient overvoltage protection among the safety requirements the designer must assess; in a high-lightning country like Colombia the SPD is the standard measure in main boards.
Updated: July 22, 2026
