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Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TT
MPN: 83020148
Alt. SKU: STPT2-40K320V-4PG
This product is discontinued. Please view this replacement item.
Why Choose the STPT2-40K320V-4PG Surge Protection Device?
The STPT2-40K320V-4PG delivers robust Type 2 surge protection with a maximum discharge current of 40kA (8/20μs), ensuring reliable safeguarding of low-voltage three-phase + neutral systems (277/480V) in 3+1 TT configurations. Its 4-pole, pluggable design facilitates straightforward installation and maintenance, minimising downtime and service disruptions.
Engineered for demanding industrial and commercial applications, this four-module device offers enhanced operational safety and longevity for critical equipment. Its reliable, replaceable cartridges and compact footprint make it a practical choice for modern distribution panels where continuous protection and ease of service are paramount.
Product Code: 83020148
Key Benefits
- High surge current capacity of 40kA ensures superior protection against transient overvoltages.
- Pluggable 4-pole design allows for easy installation and quick replacement of modules.
- Compact size (72 mm width x 70 mm length x 90 mm height) fits efficiently in distribution panels.
- Visual indication system (green/replace) for straightforward status monitoring.
- Suitable for 3-phase + neutral systems with TT and TNS configurations.
- Complies with IEC Class II and UL Type 2 standards for assured quality and safety.
Compatibility
The STPT2-40K320V-4PG is compatible with low-voltage AC systems rated at 277/480V, specifically designed for 3-phase plus neutral (3+1) TT and TNS system configurations. It integrates seamlessly with DIN rail mounting setups and supports backup fuses up to 125 A [gG]. Replacement plugs are available for both N-PE and L-N connections, ensuring continued protection and ease of maintenance.
Applications
- Industrial power distribution panels
- Commercial building electrical installations
- Renewable energy systems requiring surge protection
- Critical infrastructure and data centres
- Manufacturing facilities with sensitive electronic equipment
Frequently Asked Questions
What system configurations does this SPD support?
The STPT2-40K320V-4PG supports TT and TNS system configurations for low-voltage AC systems.
How does the indication system work?
The device features a green indicator when operational and changes colour to signal when replacement is needed, enabling easy monitoring.
Can this SPD be installed on a DIN rail?
Yes, it is designed for DIN rail mounting, facilitating straightforward integration into existing electrical panels.
What is the maximum backup fuse rating?
The device supports a maximum backup fuse rating of 125 A [gG].
Are replacement plugs available?
Yes, replacement plugs for N-PE (part number 77707664) and L-N (part number 77707671) are available for maintenance purposes.
Common Search Terms
Surge protection device, Type 2 SPD, 40kA surge protector, 3-phase surge protector, pluggable SPD, DIN rail SPD, 277/480V surge protection, industrial surge protection, commercial surge protector, TT system SPD, TNS system surge protector.
Technical Specifications
- Item number: 83020148
- Catalogue No: STPT2-40K320V-4PG
- Description: Surge Protection Device Type 2, 40kA Imax (8/20), 3Ph+N, 277/480V, 3+1 TT, 4 Poles, Pluggable, 4 Modules
- EAN/UPC Code: 8435297850854
- RoHS Compliant: Yes
- IEC SPD Type: Class II
- UL SPD Type: Type 2 Component Assembly
- Format: Pluggable
- Nominal Operating Volt Rating (Un): 277/480
- AC or DC: AC
- Nominal Discharge Current (In) (8/20): 20 kA
- Max Discharge Current : Imax (8/20): 40 kA
- Protection Modes: L-N / N-PE
- System Configuration: TT, TNS
- Following Current (Ifi): 100 A
- Short Circuit Withstand (ISCCR): 25 kA
- Indication System: Yes
- Indication System Type: Green (OK) / Not green (replace)
- Number of Poles: 4-Pole
- Torque Rating: 3 Nm
- Max. Back-Up Fuse: 125 A [gG]
- Housing Material: PA66 CT1
- Installation Mounting: DIN rail
- Uc (L-N): 320 V
- Uc (N-PE): 277 V
- Up at In (N-PE): ≤1,5 kV
- Up at In (L-N): ≤1,5 kV
- VPR L-G: 1500 V
- VPR L-L: 2000 V
- VPR N-G: 700 V
- VPR L-N: 1200 V
- Replacement Plug N-PE: 77707664
- Replacement Plug L-N: 77707671
- Product Width: 72 mm
- Product Length: 70 mm
- Product Height: 90 mm
- Sell Pack Quantity: 1 EA
- Sell Pack Weight: 0.431 kg
- Sell Pack Width: 78 mm
- Sell Pack Length: 117 mm
- Sell Pack Height: 90 mm
- Product group: Power Line SPDs
- Product Weight: 0.386 kg
| Manufacturer Part Number | 83020148 |
|---|---|
| Packed Quantity | 1 |
| Barcode | 8435297850854 |
| Height | 70mm |
| Width | 72mm |
| Depth | 90mm |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
| Manufacturer | Mersen |
| Number of Poles | 4 Pole |
| Voltage | 277/480V |
| Maximum Continuous Voltage | 320V |
| Nominal Discharge Current | 20Ka |
| System Type | TT |
| Alternative Product SKU | STPT2-40K320V-4PG |
Write Your Own Review
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.
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