Phoenix Contact ST 6 BU Feed-Through Terminal Block, Push-in, 6 mm², Blue

The Phoenix Contact ST 6 BU is a feed-through terminal block engineered for high-density control cabinets and industrial distribution systems. Its push-in connection technology allows solid or stranded conductors to be inserted directly without tools, cutting wiring time by up to 50% compared to screw terminals. With a nominal cross section of 6 mm² and a maximum load current of 50 A (with 10 mm² conductor), this blue terminal block handles demanding power distribution tasks while maintaining a compact footprint on standard DIN rails.

Advantages

Tool-free push-in termination speeds up panel building and reduces operator fatigue. The terminal block accepts a wide range of conductor sizes from 0.5 mm² to 10 mm² solid, or 20 AWG to 8 AWG, giving flexibility for mixed wiring schemes. Its polyamide housing meets UL 94 V0 flammability requirements and withstands operating temperatures from -60 °C to 105 °C, ensuring reliability in harsh environments. The 2-position, single-level design simplifies circuit identification and maintenance.

Suitable for

• Industrial control panels and motor control centers
• Power distribution in machinery and conveyor systems
• Building automation and HVAC control cabinets
• Railway and transportation equipment requiring vibration-resistant connections
• Solar inverters and energy storage systems

Key specifications

• Connection technology: Push-in
• Nominal cross section: 6 mm²
• Colour: Blue
• Number of positions: 2
• Number of levels: 1
• Mounting: DIN rail NS 35/7.5 or NS 35/15
• Nominal voltage (IEC): 1000 V
• Nominal current (IEC): 41 A (max. 50 A with 10 mm² conductor)
• Rated surge voltage: 8 kV
• Insulating material: Polyamide (PA), UL 94 V0
• Pollution degree: 3, Overvoltage category: III
• Stripping length: 12 mm
• Conductor cross section solid: 0.5–10 mm²
• Conductor cross section stranded: 0.5–6 mm²
• AWG range: 20–8
• Operating temperature: -60 °C to 105 °C

Recommendations

Pair the ST 6 BU with Phoenix Contact end covers and partition plates for grouped installations. For high-vibration environments, verify that the push-in connection meets your retention requirements; otherwise consider screw-clamp alternatives. Always follow local wiring regulations and use appropriate ferrules for stranded conductors.