Teknomega PTB3123 yellow and green single-pole, four-conductor power terminal block for copper and aluminium cables from 2.5 to 35 mm², suitable for protective earth distribution.
£5.01
The Teknomega PTB3123 is a compact single-pole, four-conductor power terminal block designed for secure electrical connections within industrial switchboards, control cabinets and distribution panels. Its yellow and green insulating body provides clear protective earth identification, helping installers organise panel wiring and recognise the conductor function quickly.
Suitable for both copper and aluminium conductors from 2.5 to 35 mm², the PTB3123 uses a tinned aluminium conductor body that supports reliable connections between different conductor materials. The terminal is supplied pre-greased to support electrical conductivity and protect against oxidation, so no additional grease is required on the cable during installation.
With a continuous current rating of 135 A for copper conductors and 120 A for aluminium conductors, plus an insulation rating of 1000 V AC or 1500 V DC, the PTB3123 provides dependable performance for protective earth and high-current distribution applications.
The Teknomega PTB3123 provides a clearly identified connection point for protective earth conductors in electrical panels. Its four-conductor configuration allows multiple cables to be joined securely through one compact terminal, helping simplify wiring layouts and reduce the amount of DIN rail space required.
The pre-greased, tinned aluminium conductor supports connections using either copper or aluminium cables while helping protect the contact area from oxidation. This makes the PTB3123 a practical choice for panel builders and electrical contractors working with mixed conductor materials.
| Current | 135 A |
|---|---|
| Phase | Single Phase |
| IP Rating | IP20 |
| Manufacturer | Teknomega |
| Series | PTB3 |
| Model | PTB3123 |
| Reference | PTB-2-35-Y |
| 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 continuous 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 PTB3123 is primarily used to connect and distribute protective earth 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 PTB3123 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 to the cable before connection.
It clips onto a standard 35 mm DIN rail. The terminal should be supported during tightening or secured with suitable DIN rail end stops.
Teknomega PTB3 power terminal blocks provide compact dimensions, mixed-conductor compatibility and dependable electrical performance for professional switchboard, automation and power distribution installations.
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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...