M12 Connector Selection Guide: Metal vs. Plastic – A Technical Comparison

M12 Connector Selection Guide: Metal vs. Plastic – A Technical Comparison

When choosing between metal and plastic M12 connectors for industrial applications, key technical parameters and operational conditions must be considered. Here’s a data-driven comparison:  

 1. Material Properties  

- Metal Housing (Brass/Stainless Steel)  

  ▶ EMI Shielding: ≥60dB (IEC 61000-4-3)  

  ▶ Temp. Range: -40°C to +125°C  

  ▶ IP Rating: IP67/IP69K (with sealing)  

- Plastic Housing (PBT/PA66)  

  ▶ Insulation Resistance: >1000MΩ (500VDC)  

  ▶ Temp. Range: -25°C to +85°C  

  ▶ Weight: 40-50% lighter (same size)  

 2. Application Scenarios  

Choose Metal When:  

• High EMI environments (e.g., near VFDs/servos)  

• Vibration >5G (ISO 10816-3)  

• Exposure to chemicals/oils  

Choose Plastic When:  

• Control cabinets/sensors (vibration <2G)  

• Cost-sensitive projects (35-60% cheaper)  

• Ground loop-sensitive circuits  

 3. Durability & Maintenance  

Metal connectors withstand >500 mating cycles (VDE0627), while plastic averages 300-400. However, plastic avoids plating wear, making it better for frequent, low-force connections.  

Recommendation: Share your specs (vibration, temp, EMC) for a tailored solution.  

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