Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
Mersen Surge Protector Type 1+2 SPD 2 Pole 120 Volt 20KA TT
Mersen 83120112 STPT12-12K150V-2PG Type 1+2 surge protection device with 12.5 kA lightning impulse current, 120 V nominal operating voltage, 1Ph+N 1+1 TT configuration, 2-pole pluggable DIN rail design and 2-module format.
£123.58
Why Choose the Mersen 83120112 Surge Protection Device?
The Mersen 83120112 STPT12-12K150V-2PG is a reliable Type 1+2 surge protection device (SPD) designed to protect low-voltage electrical installations against lightning currents and transient overvoltages. Part of the Mersen Surge-Trap® Pluggable STPT12 Series, it is suitable for incoming supply panels, main distribution boards and installations requiring robust first-level surge protection.
This device provides combined protection for single-phase plus neutral systems, using a 1+1 TT configuration with L-N and N-PE protection modes. Its compact pluggable design makes installation straightforward and allows quick module replacement during maintenance.
With a 12.5 kA lightning impulse current (10/350 μs), 120 V nominal operating voltage (Un) and 150 V L-N maximum continuous operating voltage (Uc), the 83120112 is ideal for protecting sensitive equipment in industrial, commercial and infrastructure electrical systems.
Key Advantages
- Type 1+2 surge protection device for lightning current and transient overvoltage protection.
- 12.5 kA Iimp (10/350 μs) lightning impulse current rating.
- 50 kA maximum discharge current (8/20 μs).
- 1Ph+N 1+1 TT configuration for single-phase plus neutral systems.
- Compact 2-pole pluggable design for DIN rail installation.
- Suitable as the first level of protection in main distribution boards.
Key Features
- Mersen Surge-Trap® STPT12 Series.
- Catalogue number: 83120112.
- Model: STPT12-12K150V-2PG.
- IEC Type 1+2 / Class I+II surge protection.
- 120 V AC nominal operating voltage (Un).
- 150 V AC maximum continuous operating voltage L-N.
- 255 V AC maximum continuous operating voltage N-PE.
- 2-pole, 2-module pluggable format.
- DIN rail mounting.
- Designed for TT and TNS system configurations.
Reliable Protection Against Transient Overvoltages
Surge protection devices help protect electrical equipment from voltage spikes caused by lightning activity, switching operations and network disturbances. Installing a Type 1+2 SPD at the incoming supply point helps reduce the risk of equipment damage, downtime and disruption to critical electrical systems.
The Mersen STPT12 Series is engineered for low-voltage distribution applications where dependable surge protection and simple maintenance are required. The pluggable module format allows quick replacement without rewiring the complete assembly.
Typical Applications
- Main electrical distribution boards.
- Incoming power supply panels.
- Single-phase plus neutral electrical systems.
- Commercial building installations.
- Industrial control panels.
- Infrastructure and critical power systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Impulse Current Iimp (kA) | 12.5 kA | |
|---|---|---|
| Voltage | 120 V | |
| Poles | 2-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 1+2 | |
| Earthing System | TN-S, TT | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | No | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® Pluggable STPT12 | |
| Model | STPT12-12K150V-2PG | |
| Part number | 83120112 | |
| Product type | Type 1+2 Surge Protection Device | |
| IEC classification | Class I+II | |
| Lightning impulse current (Iimp 10/350 μs) | 12.5 kA | |
| Maximum discharge current (Imax 8/20 μs) | 50 kA | |
| Nominal discharge current (In 8/20 μs) | 20 kA | |
| Nominal operating voltage (Un) | 120 V AC | |
| Maximum continuous operating voltage L-N (Uc) | 150 V AC | |
| Maximum continuous operating voltage N-PE (Uc) | 255 V AC | |
| Protection modes | L-N / N-PE | |
| System configuration | TN-S, TT | |
| Number of poles | 2 | |
| Module width | 2 modules | |
| Mounting type | DIN rail | |
| Format | Pluggable | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen 83120112 used for?
It is used to protect single-phase plus neutral low-voltage electrical installations from lightning currents and transient overvoltages.
What type of surge protection device is it?
The 83120112 is a Type 1+2 (Class I+II) surge protection device for combined lightning current and surge protection.
What voltage is the Mersen 83120112 rated for?
It has a 120 V AC nominal operating voltage and a 150 V AC maximum continuous operating voltage L-N.
What system configuration does it support?
The Mersen 83120112 is designed for 1+1 TT configurations and is suitable for TT and TNS low-voltage systems.
Where is this SPD typically installed?
It is typically installed on a DIN rail in main distribution boards or incoming supply panels as the first level of surge protection.
Trusted Protection for Critical Electrical Systems
Mersen Surge-Trap® surge protection devices are trusted worldwide to help protect electrical installations, industrial equipment and critical infrastructure from the damaging effects of lightning strikes and transient overvoltages.
