Phoenix 3208524 PTTB 1,5/S BU Double-Level Push-in Terminal Block, Blue

With a nominal current of 17.5 A and a voltage rating of 500 V, this double-level terminal block handles demanding industrial control and power distribution tasks in a compact 3.5 mm width. The push-in connection technology allows tool-free wiring of solid and flexible conductors up to 1.5 mm², cutting installation time significantly.

Overview

The Phoenix Contact PTTB 1,5/S BU is a two-level terminal block with four push-in connection points, designed for DIN rail mounting on NS 35/7,5 or NS 35/15. Its blue polyamide housing meets UL 94 V0 flammability standards, ensuring safety in panel building and machine wiring. The block is rated for pollution degree 3 and overvoltage category III, making it suitable for harsh industrial environments.

What stands out

• Push-in termination: no tools required for solid or ferruled conductors, reducing wiring time by up to 50%.
• Double-level design: two independent potential levels in a single 3.5 mm wide module, saving space on the DIN rail.
• Wide temperature range: operates from -60 °C to 105 °C, suitable for extreme conditions.
• High current density: 17.5 A per level with 500 V isolation, ideal for control circuits and signal distribution.
• Robust housing: PA 6.6 polyamide, halogen-free, with V0 flammability rating for enhanced fire protection.

Technical details

• Connection technology: Push-in
• Number of levels: 2
• Number of connections: 4
• Nominal cross section: 1.5 mm²
• Conductor cross section solid: 0.14 mm² – 1.5 mm²
• Conductor cross section flexible: 0.14 mm² – 1.5 mm²
• Stripping length: 8 mm – 10 mm
• Nominal voltage (IEC): 500 V
• Nominal current (IEC): 17.5 A
• Mounting type: DIN rail (NS 35/7,5, NS 35/15)
• Insulating material: PA (Polyamide)
• Flammability rating: V0 (UL 94)
• Operating temperature: -60 °C to 105 °C
• Pollution degree: 3
• Overvoltage category: III
• Width: 3.5 mm
• Length: 65.8 mm
• Height (on NS 35/7,5): 42.5 mm

Our verdict

The PTTB 1,5/S BU combines high electrical performance with space-saving double-level design and tool-free push-in wiring. It is a reliable choice for control cabinets, PLC interfaces, and industrial automation where density and speed matter.