Wieland Electric RST20i5 S1 Male Connector 5-Pole Screw Terminal IP66/IP68/IP69 Black

Engineered for the most demanding industrial environments, this 5-pole male connector delivers a robust 20 A current rating and exceptional sealing — IP66, IP68 (1 m, 2 h), and IP69 — making it a premier choice for power and signal transmission where reliability is non-negotiable. The RST20i5 series from Wieland Electric combines rugged construction with precision engineering, ensuring secure connections in automation, machinery, and outdoor installations.

Overview

The Wieland Electric RST20i5 S1 male connector (model 96.052.4053.6) is a straight, inline plug designed for screw terminal wiring. It accommodates solid or stranded conductors from 0.5 mm² to 4 mm², with a cable diameter range of 6–10 mm. The housing is crafted from high-grade polyamide (PA) in black (TB04), offering excellent chemical and UV resistance. Silver-plated copper-zinc contacts ensure low contact resistance and long-term corrosion protection, while the screw locking mechanism provides a vibration-proof connection. The connector is mechanically coded S1 to prevent mismating, enhancing safety in multi-connector setups.

What stands out

• Triple ingress protection: IP66, IP68 (1 m/2 h), and IP69 for washdown and temporary submersion.
• High current rating of 20 A at 250/400 V AC, suitable for power-hungry applications.
• Wide operating temperature range from -30 °C to +100 °C, ensuring performance in extreme climates.
• UL94 V-0 flammability rating for enhanced fire safety.
• Silver-plated contacts for superior conductivity and durability.
• Mechanical coding S1 prevents incorrect mating, reducing downtime and errors.

Technical details

• Connector type: Male connector (plug)
• Series: RST20i5
• Number of poles: 5
• Rated voltage: 250 V / 400 V AC
• Rated current: 20 A
• Connection technology: Screw terminal
• Wire cross-section (solid/stranded): 0.5 - 4 mm²
• Cable diameter range: 6 - 10 mm
• Protection class: IP66, IP68 (1m/2h), IP69
• Mechanical coding: S1
• Locking type: Screw locking
• Housing material: Polyamide (PA)
• Color: Black (TB04)
• Contact material: Copper-zinc alloy (CuZn), silver-plated
• Operating temperature range: -30 °C to +100 °C
• Flammability rating: UL94 V-0
• Pollution degree: 3
• Overvoltage category: III

Our verdict

For engineers and technicians seeking a dependable, high-performance circular connector, the Wieland RST20i5 S1 is an outstanding choice. Its rugged sealing, wide temperature tolerance, and robust electrical ratings make it ideal for harsh industrial settings. The screw terminals allow quick, tool-free installation, while the S1 coding adds an extra layer of safety. Whether for factory automation, renewable energy, or outdoor equipment, this connector delivers long-term reliability.