Mersen Surge-Trap STPT12-12K275V-2PM Type 1+2 Surge Protection Device, 2 Pole TN-S
- Brand:
- Mersen
- Part number:
- 83120121
- EAN:
- 8435297849131
Two-pole pluggable combined Type 1+2 surge arrester for single-phase TN-S systems, with 12.5kA lightning impulse rating on both poles and a remote end-of-life contact.
- Combined Type 1+2 protection
- Single-phase TN-S, 2 pole
- Iimp 12.5kA, Imax 50kA, Up 1.3kV
- Remote end-of-life contact
- Plug-in coded cartridges
Out of stock
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Minimum order £50 ex VAT. All prices exclude VAT, which is added at checkout.
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Specifications
Electrical
| Supply | Single phase |
|---|---|
| Earthing system | TN-S, TN-C-S (PME) |
| Earthing system (as supplied) | TN |
| Remote signalling contact | Yes |
| Application | Mains AC |
Protection
| SPD type | Type 1+2 |
|---|---|
| Lightning impulse current (Iimp per pole) | 12.5 kA |
| Max discharge current (Imax) | 50 kA |
| Voltage protection level (Up) | 1.3 kV |
Dimensions
| DIN rail width | 2 modules |
|---|
Construction
| Replaceable protection module | Yes |
|---|
Fit
| Mounting | DIN rail |
|---|
Identification
| Brand | Mersen |
|---|---|
| Part number | 83120121 |
| EAN | 8435297849131 |
| Range | Mersen Surge-Trap STPT12 |
More technical data
| Manufacturer | Mersen (Surge-Trap STPT12, catalogue STPT12-12K275V-2PM) |
|---|---|
| SPD class | Type 1+2 / Class I+II to IEC 61643-11 and EN 61643-11 |
| System | TN-S, single phase plus neutral; Un 230 VAC; Uc 275V |
| Lightning impulse current Iimp (10/350) | 12.5kA |
| Max discharge current Imax (8/20) | 50kA; nominal discharge current In: 20kA |
| Voltage protection level Up at In | 1.3kV |
| Remote contact | yes; cartridge SP12-12K275V |
- Back-up fuse 200A gG, Icc 25kA, IP20, PA66 V-0 body, -40 to +80C
Product details
Configured for single-phase TN-S supplies, this Surge-Trap STPT12 arrester uses identical 275V cartridges on both poles rather than the neutral spark gap needed on a TT system. It carries 12.5kA of lightning impulse current per pole and holds the protection level to 1.3kV.
Key features
- Combined Type 1+2 / Class I+II protection for single-phase TN-S installations
- Two poles, both using the SP12-12K275V cartridge for 230V line-neutral duty
- Mechanically coded plug-in cartridges prevent replacement errors
- Visual and remote end-of-life indication built into the unit
- Reversible chassis for cable entry from either direction
Typical applications
Fit it at incoming supply panels on TN-S installations exposed to direct lightning effects: industrial and commercial buildings with an external lightning protection system, distribution centres and warehouses, water treatment and smart grid metering positions, and telecoms or data equipment rooms fed from a dedicated single-phase supply.
Compliance
Tested to IEC 61643-11 and EN 61643-11 as a Type 1+2 / Class I+II device, with a PA66 CT1 V-0 body and IP20 protection. BS 7671 requires transient overvoltage risk to be assessed, with Type 1 protection where partial lightning current may enter the installation and coordinated Type 2 protection downstream.
Order today for fast UK dispatch on genuine Mersen surge protection at trade-direct prices.
