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Mersen Surge Protector Type 2+3 SPD 4 Pole 120/208 Volt 10KA TT Remote Indication
MPN: 83230125
Alt. SKU: STPT23-20K150V-4PGM
Why Choose the Surge Protection Device Type 2+3 STPT23-20K150V-4PGM?
The STPT23-20K150V-4PGM provides robust surge protection for 3-phase+N, 120/208V TT systems, delivering a high discharge capacity of up to 20kA (Imax, 8/20µs) across four poles. Its pluggable, compact four-module design ensures straightforward installation, futureproofing your panels with easy maintenance and replacement.
Engineered for reliability in demanding environments, the unit features remote indication for rapid fault signalling and compliance with modern safety standards. Trust this SPD to minimise equipment downtime and protect sensitive assets from transient overvoltages and electrical surges.
Product Code: 83230125
Key Benefits
- High discharge capacity of 20 kA ensures effective protection against surges.
- Pluggable four-module design allows easy installation and maintenance.
- Remote indication system provides quick and clear fault signalling.
- Compact size saves panel space without compromising performance.
- Compliant with IEC SPD Type Class II + III standards for reliable safety.
Compatibility
This surge protection device is compatible with 3-phase plus neutral (3Ph+N) TT and TNS electrical systems operating at 120/208V nominal voltage. It is designed to be mounted on standard DIN rails, fitting seamlessly into existing electrical panels and switchgear installations.
Applications
- Protection of industrial and commercial electrical installations from transient overvoltages.
- Use in power distribution panels for manufacturing plants and facilities.
- Surge protection in critical infrastructure such as data centres and hospitals.
- Installation in renewable energy systems requiring robust surge suppression.
- Suitable for use in TT and TNS earthing systems to safeguard sensitive equipment.
Technical Specifications
- Item number: 83230125
- Catalogue No: STPT23-20K150V-4PGM
- Description: Surge Protection Device Type 2+3, 20kA Imax (8/20), 3Ph+N, 120/208V, 3+1 TT, 4 Poles, Pluggable, 4 Modules, Remote indication
- EAN/UPC Code: 8435297850786
- RoHS Compliant: Yes
- IEC SPD Type: Class II + III
- Format: Pluggable
- Nominal Operating Volt Rating (Un): 120/208
- AC or DC: AC
- Max Discharge Current : Imax (8/20): 20 kA
- Protection Modes: L-N / N-PE
- System Configuration: TT, TNS
- Combined Discharge Voltage (1,2/50) (Uoc): 10 kV
- Following Current (Ifi): 100 A
- Short Circuit Withstand (ISCCR): 25 kA
- Indication System: Yes
- Indication System Type: Green (OK) / Not green (replace) Microswitch
- Number of Poles: 4-Pole
- Torque Rating: 3 Nm
- Max. Back-Up Fuse: 63 A [gG]
- Housing Material: PA66 CT1
- Installation Mounting: DIN rail
- Uc (L-N): 150 V
- Uc (N-PE): 255 V
- Up at In (N-PE): ≤1,5 kV
- Up at In (L-N): ≤0,8 kV
- MCOV L-G: 275 V
- MCOV L-L: 550 V
- MCOV N-G: 277 V
- MCOV L-N: 275 V
- Replacement Plug N-PE: 83230000
- Replacement Plug L-N: 83230001
- Product Width: 72 mm
- Product Length: 70 mm
- Product Height: 90 mm
- Sell Pack Quantity: 1 EA
- Sell Pack Weight: 0.415 kg
- Sell Pack Width: 78 mm
- Sell Pack Length: 117 mm
- Sell Pack Height: 90 mm
- Product group: Power Line SPDs
- Product Weight: 0.388 kg
Frequently Asked Questions
What type of systems is this SPD compatible with?
The STPT23-20K150V-4PGM is designed for 3-phase plus neutral (3Ph+N) TT and TNS systems operating at 120/208V.
Does this device provide remote indication?
Yes, it features a remote indication system with a green (OK) / not green (replace) microswitch for quick fault signalling.
Can this SPD be easily replaced or maintained?
Its pluggable four-module design allows for straightforward installation, maintenance, and replacement of modules.
What is the maximum discharge current rating?
The device can handle a maximum discharge current (Imax, 8/20µs) of 20 kA per pole.
Common Search Terms
surge protection device, SPD Type 2+3, 20kA surge protector, 3-phase surge protector, 120/208V SPD, pluggable surge protector, DIN rail SPD, remote indication SPD, power line surge protection
| Manufacturer Part Number | 83230125 |
|---|---|
| Packed Quantity | 1 |
| Barcode | 8435297850786 |
| Height | 70mm |
| Width | 72mm |
| Depth | 90mm |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
| Manufacturer | Mersen |
| Number of Poles | 4 Pole |
| Voltage | 120/208V |
| Maximum Continuous Voltage | 150V |
| Nominal Discharge Current | 10Ka |
| Remote Indication | Yes |
| System Type | TT |
| Alternative Product SKU | STPT23-20K150V-4PGM |

Protection system of coordinated stages: Type 1, 2 and 3 SPDs
The SPDs of a surge protection system must be able to withstand the discharged current and provide a Ures level (residua l voltage) lower than the Ue peak voltage that the equipment can withstand. Most of the times it is not possible to achieve this with just one SPD, especially because the intensity of the surge is not known, and because of the induction of overvoltages when conductors exceed 10m.
The optimal system of protection is the 3-STEP approach, in which successive stages are combined in the performance of high discharge capacity devices and devices with an optimal voltage protection level (low). This is addressed by the definition of "Types" or "Classes" of SPDs according to the type of transient pulses to which each protected zone in the installation is subject to.

