Teknomega PTB3521 heavy-duty single-pole 2-way power terminal block for aluminium and copper conductors up to 240 mm², suitable for industrial electrical distribution.
£31.36
The Teknomega PTB3521 is a heavy-duty single-pole power terminal block designed for high-capacity electrical distribution in industrial switchboards, control panels and power distribution systems. Also referenced as PTB-2-240-G, this robust terminal provides a 2-way connection configuration, allowing large aluminium and copper conductors to be safely branched from a single supply point.
Manufactured with a durable PA66 UL94-V0 self-extinguishing insulating body and a tinned aluminium conductor block, the PTB3521 offers excellent electrical conductivity while allowing direct connection of both aluminium and copper conductors. Pre-greased terminals help reduce oxidation and ensure long-term electrical performance in demanding industrial environments.
Supporting conductor sizes from 35 mm² to 240 mm², the PTB3521 is rated for 1000 V AC / 1500 V DC with an 8 kV impulse withstand voltage. Its compact design allows installation on DIN rail or directly onto mounting panels within electrical enclosures.
The Teknomega PTB3521 provides a safe and organised method of distributing high-current conductors within industrial electrical panels. Its 2-way configuration allows feeder cables to be split efficiently while maintaining secure, low-resistance electrical connections.
Designed for modern switchboards and automation systems, the PTB3521 combines durable construction with excellent electrical performance. Its compatibility with both aluminium and copper conductors makes it an ideal solution for industrial power distribution, machine building and commercial electrical installations.
| Phase | Single Phase |
|---|---|
| IP Rating | IP20 |
| Manufacturer | Teknomega |
| Series | PTB Power Terminal Blocks |
| Model | PTB3521 |
| Reference | PTB-2-240-G |
| Product type | Power terminal block |
| Number of poles | 1 |
| Connections | 2-way |
| Conductor size | 35 to 240 mm² (Al/Cu) |
| Current rating | 425 A (Cu), 380 A (Al) |
| Rated insulation voltage (Ui) | 1000 V AC / 1500 V DC |
| Impulse withstand voltage (Uimp) | 8 kV |
| Protection rating | IP20 |
| Insulating body | PA66 UL94-V0 |
| Conductor material | Tinned aluminium |
| Screw material | Galvanised steel |
| Maximum operating temperature | +85 °C |
| Colour | Grey |
| Mounting type | DIN rail or panel mounting |
| Dimensions (A × B × C) | approx. 122.5 × 64.8 × 71.4 mm |
| Weight | approx. 0.6 kg |
| Standards | EN 60947-7-1, EN 61238-1-1 |
| HS Code | 85369095 |
The PTB3521 is used for branching and terminating large aluminium and copper conductors within industrial electrical distribution systems and control panels.
The terminal accepts aluminium and copper conductors ranging from 35 mm² to 240 mm².
Yes. The tinned aluminium conductor block is specifically designed for safe connection of both aluminium and copper conductors.
The terminal has a rated insulation voltage of 1000 V AC / 1500 V DC with an impulse withstand voltage of 8 kV.
The terminal can be mounted directly onto a DIN rail or secured to a mounting panel inside electrical enclosures.
Teknomega PTB power terminal blocks are trusted by panel builders, OEM manufacturers and electrical engineers for delivering reliable high-current conductor connections in industrial power distribution systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...