Phoenix Contact 3038875 ST 4-MT Knife-disconnect terminal block 20A

The Phoenix Contact ST 4-MT is a knife-disconnect terminal block rated at 400 V nominal voltage and 20 A nominal current, using spring-cage connection for tool-free, one-handed wiring. The single-level design accepts conductors from 0.08 mm² to 6 mm² and mounts on NS 35/7.5 or NS 35/15 DIN rail, suiting railway, machine building, and plant engineering installations.

Technical specifications:

• Part designation: ST 4-MT
• Catalog number: 3038875
• Manufacturer: Phoenix Contact
• EAN: 4017918941246
• Product type: Knife-disconnect terminal block
• Nominal voltage: 400 V
• Nominal current: 20 A
• Rated surge voltage: 6 kV
• Connection method: Spring-cage connection
• Nominal cross section: 4 mm²
• Conductor cross-section (rigid): 0.08 mm² - 6 mm²
• Conductor cross-section (flexible): 0.08 mm² - 4 mm²
• Conductor cross-section (flexible, ultrasound-compressed): 0.34 mm² - 6 mm²
• Stripping length: 8 mm - 10 mm
• Number of levels: 1
• Mounting: NS 35/7.5, NS 35/15
• Color: gray (RAL 7042)
• Width: 6.2 mm
• Height: 61.5 mm
• Depth on NS 35/7.5: 36.5 mm
• Depth on NS 35/15: 44 mm
• Weight (excl. packing): 10.67 g
• Insulating material: PA
• Flammability rating: UL 94 V0
• Operating temperature: -60°C to 110°C
• Pack size: 50 pc
• Country of origin: TR

Features and benefits:

• Spring-cage connection enables one-handed wiring without additional tools
• Knife disconnection provides convenient circuit separation directly at the terminal
• Accepts very small flexible conductors from 0.08 mm² for versatile wiring tasks
• No cross-section restriction when using conductors with ferrules
• Spring-loaded contact elements deliver reliable vibration resistance, verified by DIN EN 50155 testing
• Compatible with the CLIPLINE complete system of bridging, marking, and testing accessories

Applications:

• Control cabinet wiring in machine building and automation panels
• Power and signal circuit distribution in plant engineering installations
• Railway vehicle wiring where DIN EN 45545-2 fire protection compliance is required
• Industrial assemblies requiring individual circuit isolation at the terminal level

Compliant with IEC 60947-7-1. Part of the Phoenix Contact CLIPLINE complete system, compatible with standardized bridging, marking, and testing accessories.

Also known as: Phoenix Contact ST 4-MT, Phoenix 3038875, ST4-MT knife disconnect terminal, Phoenix Contact spring-cage disconnect block.