PBT+GF for connector insulation. PA66+GF for structural shells. We process UL 94 V-0 and UL 94 V-0 FR resins with the dielectric and dimensional consistency your charging program demands.
EV charging applications split into two distinct resin families — one optimized for dielectric performance, one for structural load and UV exposure. Getting this wrong at the design stage is expensive.
The standard for connector bodies, terminal inserts, BMS housings, and busbar isolators. Low water absorption (0.02–0.2%) means dimensional stability after molding — critical for pin-pitch tolerance retention in multi-pole connectors.
Key properties:
Reference grades:
For charging-gun outer housings, vehicle inlet bodies, and bracket structures requiring high impact strength and thermal resistance. Tensile strength 150–180 MPa with HDT above 250°C makes it the choice for mechanically demanding outer shells.
Key properties:
Reference grades:
Covert Housing produced in PBT + 30% GF, UL 94 HB, FMVSS 302 — demonstrating our ability to process flame-rated PBT+GF to automotive interior flammability standards.
Pin-pitch and mating-interface accuracy in multi-pole EV connectors is non-negotiable. We document all critical dimensions against ISO 20457 with Cpk reporting on request.
| Feature Type | Tolerance Grade | Typical ± (mm) | Notes |
|---|---|---|---|
| General connector body | ISO 20457 TG6 | ±0.15–0.20 | PBT+GF baseline |
| Pin-pitch (mold-fixed) | ISO 20457 TG4 | ±0.05–0.08 | Critical-to-quality feature |
| Mating-face flatness | — | 0.05 mm / 100 mm | Controlled via tool design |
| Terminal retention bore | ISO 286 H8/h8 | ±0.02–0.03 | CNC post-machining option |
| Cumulative pin-pitch | — | ±0.20 across row | Multi-pole accumulated error |
PA66-based parts must be inspected after 48-hour conditioning at 23°C / 50% RH per ISO 20457. Moisture absorption causes post-mold dimensional drift — we disclose this upfront and build it into our inspection protocol.
CCS1/CCS2/Type 2/NACS outer housings and inserts
On-vehicle charge port housings and retention systems
Battery management system enclosures with EMI shielding grades
High-CTI PBT separators for 800V architecture
Proximity, temperature, and current sensing enclosures
IP65/66 rated AC charging station outer shells
Send us your drawings or describe your resin and tolerance requirements. We'll respond with a technical assessment before quoting.
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