Phoenix Contact PTI 4-L/L 3-Level Installation Terminal Block, Push-in, 4 mm², 400 V, 32 A, Grey

In industrial control cabinets and building installations, electricians need a reliable way to distribute power and signals across multiple levels without wasting space. The Phoenix Contact PTI 4-L/L installation terminal block solves this with a compact 3-level design that supports push-in wiring for fast, tool-free connections. Each level accepts conductors from 0.5 to 4 mm² (AWG 20–10), making it ideal for both fine-stranded and solid wires in control circuits and power distribution.

Key specifications

• Type: Installation terminal block, 3 levels
• Connection technology: Push-in (tool-free)
• Nominal cross section: 4 mm²
• AWG range: 20 – 10
• Nominal voltage (IEC): 400 V
• Nominal current (IEC): 32 A
• Number of connections per level: 2
• Stripping length: 10 mm
• Mounting type: DIN rail NS 35/7,5 or NS 35/15
• Housing material: Polyamide (PA), UL 94 V0
• Colour: Grey
• Operating temperature: -60 °C to 105 °C
• Approvals: VDE, UL, CSA, EAC

Why choose it

The push-in connection technology reduces wiring time by up to 50% compared to screw terminals—simply insert the stripped conductor and it locks securely. The 3-level structure saves valuable rail space, allowing you to connect multiple circuits in a single compact block. Its polyamide housing is flame-retardant and resistant to harsh industrial environments, ensuring long-term reliability.

Ideal use cases

• Building automation and installation distribution boards
• Machine control panels requiring dense wiring
• Power distribution in HVAC and lighting systems
• Retrofit projects where space is limited

Good to know

This terminal block is rated for pollution degree 3 and overvoltage category III, making it suitable for industrial environments with occasional condensation or conductive pollution. It supports multi-conductor wiring, allowing two wires per connection point for daisy-chaining. Always verify the maximum current per level when using all three levels simultaneously to avoid overheating.