PA66 vs PBT Connector Housing: Material Comparison
The choice between PA66 (Polyamide 66 / Nylon 66) and PBT (Polybutylene Terephthalate) for connector housings affects thermal performance, mechanical strength, chemical resistance, and cost.
Material Properties Comparison
| Property | PA66 V0 | PBT GF |
|---|---|---|
| Continuous use temperature | 105°C | 125°C |
| Peak temperature | 150°C | 180°C |
| Flame retardancy | UL94 V-0 | UL94 V-0 |
| Glow wire (IEC 60335-1) | 850°C pass | 850°C pass |
| Tensile strength | 80 MPa | 120 MPa (GF30) |
| Moisture absorption | 2.5% (conditioned) | 0.2% |
| Chemical resistance | Good | Excellent |
| Dimensional stability | Moderate | Excellent |
| Cost | Lower | Higher |
PA66 V0 — The Home Appliance Standard
PA66 is the most widely used connector housing material in home appliances.
- Excellent cost-performance ratio with good mechanical strength and toughness.
- Passes IEC 60335-1 glow wire testing at 850°C. Well-established in the supply chain with consistent molding quality.
When to use PA66: Standard home appliances (refrigerators, washing machines, AC indoor units), cost-sensitive applications, indoor environments, operating temperatures below 105°C.
PBT GF — The High-Performance Option
- Higher continuous temperature rating (125°C) with excellent dimensional stability and superior chemical resistance.
- Higher material cost (20-40% more than PA66) but justified for demanding applications.
When to use PBT: Automotive under-hood connectors, outdoor AC units, high-temperature applications (>105°C), environments with chemical exposure.
We primarily use PA66 V0 for our standard connector housings. PBT GF is available for custom orders, particularly for automotive-grade or outdoor-rated connectors.
Haiyongchang Engineering Team — 20+ years of connector manufacturing experience. Haiyongchang Electronics is a leading B2B connector manufacturer supplying Bosch, Haier, Hisense, Midea, Meiling, and LG.
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