M8 3‑pole straight circular connector Harting 21 02 151 2305

Straight M8 3‑pole circular connector by Harting model 21 02 151 2305 is a compact industrial connector intended for reliable signal and low‑power connections in automation environments. The connector’s three contacts in an M8 form factor provide secure mating for transmit/receive circuits or small power feeds. Its straight housing is designed for space‑saving installation on sensors, actuators and field devices where a robust electrical interface and repeatable connections are required.

Advantages

The Harting M8 3‑pole straight circular connector delivers consistent contact pressure and mechanical retention for repeated mating cycles, reducing the risk of intermittent connections. Its small diameter and straight configuration simplify routing in tight spaces while maintaining reliable electrical performance. Constructed for industrial use, the connector offers straightforward installation and compatibility with standard M8 cabling systems.

Suitable for

• Sensor and actuator cabling in factory automation
• Machine control signal wiring
• Low‑power signal transmission between field devices
• Compact installations with limited panel depth

Key specifications

• Connector type: straight circular connector, M8 format
• Number of contacts: 3 (three‑pole)
• Contact function: signal and low‑power circuits
• Contact material and plating: industrial‑grade contacts for reliable conductivity
• Mechanical mating: threaded or locking mechanism typical for M8 connectors
• Housing: compact straight body suitable for tight installations
• Operating environment: designed for industrial automation applications

How to use

Install the straight M8 connector by preparing the cable to the recommended conductor lengths and strain relief requirements, then terminate conductors to the contact insert according to the wiring diagram for the application. Bring the connector into alignment with the mating receptacle and engage the threaded/locking interface until secure. Verify correct wiring and mechanical fit before applying power or signals. Use appropriate tools for termination and avoid excessive bending at the cable entry to preserve contact reliability.

Recommendations

For reliable long‑term performance, inspect contact mating surfaces periodically, ensure proper cable strain relief, and select cables with suitable insulation and cross‑section for the intended signal or low‑power application. Follow equipment manufacturer guidelines for environmental protection and compatibility when using the connector in harsh conditions.