Teknomega PTB3122 blue single-pole, four-conductor power terminal block for copper and aluminium cables from 2.5 to 35 mm², ideal for neutral distribution.
£5.01
The Teknomega PTB3122 is a compact single-pole power terminal block designed for secure high-current electrical connections within industrial switchboards, electrical control panels and distribution systems. Featuring a blue insulating body for neutral conductor identification, it accepts both aluminium and copper conductors up to 35 mm², making it an ideal solution for modern industrial electrical installations.
Manufactured using a durable PA66 UL94-V0 self-extinguishing insulating body, a tinned aluminium conductor block and galvanised steel terminal screws, the PTB3122 delivers excellent electrical conductivity, corrosion resistance and long service life. Its compact DIN rail mounting design enables quick installation while maximising available panel space.
Rated at 135 A for copper conductors and 120 A for aluminium conductors, with a 1000 V AC / 1500 V DC insulation rating, the PTB3122 provides dependable performance for neutral distribution, industrial machinery and OEM electrical assemblies.
The Teknomega PTB3122 provides a clearly identified connection point for neutral conductors within industrial electrical panels. Its four-conductor configuration enables multiple neutral cables to be terminated safely within one compact terminal, helping simplify panel wiring and reduce DIN rail space requirements.
The pre-greased, tinned aluminium conductor allows reliable connections using either copper or aluminium conductors while helping protect against oxidation. This makes the PTB3122 a dependable choice for panel builders, OEM manufacturers and electrical contractors.
| Phase | Single Phase |
|---|---|
| IP Rating | IP20 |
| Manufacturer | Teknomega |
| Series | PTB3 |
| Model | PTB3122 |
| Reference | PTB-2-35-B |
| Product type | Power terminal block |
| Number of poles | 1 |
| Number of conductors | 4 |
| Copper conductor size | 2.5 to 35 mm² |
| Aluminium conductor size | 2.5 to 35 mm² |
| Continuous thermal current, copper | 135 A |
| Continuous thermal current, aluminium | 120 A |
| Short-time withstand current (Icw) | 4.2 kA for 1 second |
| Peak withstand current (Ipk) | 6.2 kA |
| Rated insulation voltage (Ui) | 1000 V AC / 1500 V DC |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Pollution degree | 3 |
| Comparative tracking index | 600 V |
| Protection rating | IP20 |
| Mounting type | 35 mm DIN rail |
| Insulating material | PA66 UL94-V0 |
| Conductor material | Tinned aluminium |
| Screw material | Galvanised steel |
| Cable stripping length | 19 mm |
| Hex key size | 4 mm |
| Tightening torque, 2.5 to 16 mm² | 3 Nm |
| Tightening torque, 25 to 35 mm² | 6 Nm |
| Maximum operating temperature | +85 °C |
| Dimensions (H × W × D) | 47.4 × 27.3 × 40.3 mm |
| Weight | Approximately 0.043 kg |
| Standards | EN 60947-7-1 and EN 61238-1-1 |
| HS Code | 85369095 |
The PTB3122 is primarily used to connect and distribute neutral conductors within industrial switchboards, control cabinets and electrical distribution panels.
It is a single-pole terminal block designed to accommodate up to four conductors.
The terminal accepts both copper and aluminium conductors from 2.5 to 35 mm².
The PTB3122 is rated at 135 A with copper conductors and 120 A with aluminium conductors.
No. The terminal is supplied pre-greased, so additional grease does not need to be applied before installation.
It clips onto a standard 35 mm DIN rail. The terminal should be supported during tightening or secured using suitable DIN rail end stops.
Teknomega PTB3 power terminal blocks are trusted by panel builders and electrical engineers for dependable mixed-conductor connections, compact installation and reliable long-term performance in industrial electrical systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...