Phoenix Contact 3211786 PTTB 4 Double-level terminal block 28A

The Phoenix Contact PTTB 4 is a double-level push-in terminal block from the PT family, integrating two separate circuits in a compact unit rated at 500 V and 28 A nominal. Conductors from 0.2 mm² to 6 mm² connect tool-free on both levels without additional tooling. At 6.2 mm wide, it mounts on NS 35/7.5 or NS 35/15 DIN rail for dense panel layouts.

Technical specifications:

• Part designation: PTTB 4
• Catalog number: 3211786
• Manufacturer: Phoenix Contact
• EAN: 4046356482707
• Levels: 2; connections: 4; potentials: 2
• Connection method: Push-in connection, 1st and 2nd level
• Conductor range: 0.2 mm² - 6 mm² rigid/flexible (AWG 24-10); nominal cross section: 4 mm²
• Stripping length: 10 mm - 12 mm
• Nominal current: 28 A (4 mm²); maximum: 32 A (6 mm² rigid); nominal voltage: 500 V; rated surge voltage: 6 kV
• Overvoltage category III; degree of pollution 3
• Mounting: NS 35/7.5, NS 35/15; dimensions: W 6.2 mm, H 83.5 mm, D 47.5 / 55 mm
• Color: gray (RAL 7042); insulating material: PA; flammability: UL 94 V0; temperature index: 130 °C
• ATEX/IECEx: II 2 G Ex eb IIC Gb; operating temperature: -60 °C to 85 °C
• Weight: 15.2 g; pack size: 50 pc; country of origin: CN

Features and benefits:

• Tool-free push-in connection on both levels reduces wiring time and eliminates additional tooling
• Spring design delivers high conductor pull-out forces for vibration-resistant, maintenance-free connections
• Double-level layout houses two separate circuits in a 6.2 mm footprint, saving significant panel space
• Compatible with CLIPLINE complete plug-in bridges, markers, and test accessories for full wiring system flexibility
• Optimized for both manual and automated wiring processes

Applications:

• Signal and power distribution in machine building control panels
• Multi-circuit terminal strips in plant engineering and process industry cabinets
• Railway rolling stock wiring installations (DIN EN 45545-2 R22-R26 HL 1-HL 3 compliant)
• Automation panels in hazardous locations requiring ATEX/IECEx certification

Compliant with IEC 60947-7-1. Part of the Phoenix Contact CLIPLINE complete system.

Also known as: Phoenix Contact PTTB 4, Phoenix 3211786, PT double-level push-in terminal block.