The M25 Series Plastic Waterproof Connector is Reunion's flagship high-current corrosion-resistant interconnect, designed for applications where substantial power delivery (up to 30A) must coexist with aggressive environmental conditions. This threaded circular connector combines a rugged 25mm interface with Ip67/IP68 waterproof and a high-strength PA66 thermoplastic housing that is inherently corrosion-proof—no rust, no oxidation, and no plating degradation.
Available in 2- to 12-pin configurations, including hybrid power-signal variants
, the M25 series supports both high-current power delivery (up to 20A) and low-voltage control signals within a single connector.
The threaded locking mechanism to ensure consistent mating reliability over hundreds of cycles, while contacts are machined from brass with selective gold plating to maintain low contact resistance. Reunion manufactures the M25 plastic series through a vertically integrated process—from precision injection molding through automated assembly and 100% electrical testing.
| Feature | Benefit |
| Corrosion-Proof PA66 Housing | No rust, no oxidation—designed for salt spray, marine, and chemical-exposed environments. |
| Up to 60% Weight Reduction | Significantly lighter than brass equivalents—reduces structural loading on equipment and mounting brackets. |
| Current Ratings up to 30A | Handles the highest power loads in the M-series—suitable for heavy motors, EV chargers, and power distribution. |
| IP67/IP68 waterproof | Withstands continuous immersion—reliable for offshore, coastal, and flood-prone installations. |
| Hybrid 3+2, 3+5 ,3+9 Configurations | Combines 3 high-current power pins (up to 20A) with 2 or 5 or 9 signal pins—reduces cable count and panel space. |
| Gold-Plated Brass Contacts | Low contact resistance (≤3mΩ) and corrosion protection—maintains performance in humid environments. |
| Threaded Locking | Vibration-resistant mating—prevents loosening from heavy machinery movement and thermal cycling. |
| -40°C to +105°C Operation | Wide temperature range covers extreme industrial, marine, and outdoor conditions. |
| Parameter | 2-pin | 3-pin | 4-pin | 5-pin | 6-pin | 3+2-pin | 3+5-pin | 3+9-pin |
| Voltage Rating | 250V | 250V | 250V | 250V | 250V | 250V/50V | 250V/50V | 250V/50V |
| Current Rating | 30A | 30A | 20A | 20A | 15A | 20A+10A | 20A+5A | 20A+5A |
| Wire Section | 0.75-4.0mm² | 0.75-4.0mm² | 0.5-2.5mm² | 0.5-2.5mm² | 0.25-1.5mm² | 0.25-2.5mm² | 0.25-2.5mm² | 0.25-2.5mm² |
Operating Temperature:-40°C ~ +105°C
Protection Rating:IP65 / IP67 / IP68 (mated condition)
Housing Material:PA66
Contact Material:Gold-plated brass
Contact Resistance:≤3mΩ
Mating Cycles:≥500
Weight:Approximately 60% lighter than comparable brass connectors
Flammability Rating:UL 94 V-0
All materials RoHS compliant
| Aspect | Reunion M25 Plastic Series | Metal M25 Connectors | Premium Plastic Connector Brands |
| Corrosion Resistance | Excellent – PA66 | Plating dependent – rust risk in salt spray | Variable |
| Weight | Up to 60% lighter | Heavy – strains mounts | Similar to Reunion |
| Price | Volume-friendly pricing | 3-4× higher | 2-3× higher |
| Current Rating | Up to 30A | Up to 30A | Typically lower |
| Hybrid Options | 3+2, 3+5 ,3+9pin | Limited | Limited |
| 100% Electrical Testing | Every unit | Sample-based | Sample-based |
| Traceability | ERP traceable | Yes | Yes |
| Lead Time | 15-17 days | 4-8 weeks | 4-6 weeks |
| Customization MOQ | Low (100 pieces) | High (500+) | High (500+) |
| ISO Certifications | 9001, 14001, 13485 | Usually 9001 | Usually 9001 |
| Certification | Scope |
| ISO 9001:2015 | Quality management—design, production, and after-sales service. |
| ISO 14001:2015 | Environmental management—verified waste reduction and sustainable practices. |
| ISO 13485:2016 | Medical device quality management—applicable for M25 used in diagnostic or monitoring equipment. |
| UL Recognized | Component-level safety certification for North American markets. |
| RoHS | Restriction of hazardous substances—compliance with EU Directive. |
Reunion's M25 plastic connector production line operates under strict process controls. IP67 waterproof is verified on every production batch through actual immersion testing (1m, 30 minutes). Test records, material certificates, and inspection reports are retained for each batch.
The M25 plastic connector's current rating is determined by the contact system and wire gauge, not the housing material. The PA66 housing is a high-temperature thermoplastic with a heat deflection temperature exceeding 200°C—well above the connector's operating range of -40°C to +105°C. The contacts themselves are brass with gold plating, and the current rating (up to 30A) is validated through temperature-rise testing per IEC 60512. In our testing, the M25 plastic connector's temperature rise at rated current is within the same limits as equivalent metal connectors. The housing's lower thermal conductivity is compensated by optimized insulator geometry and contact design that dissipates heat effectively through the cable conductors and panel interface.
Yes—the M25 plastic connector is well-suited for EV charging applications, particularly:
AC charging stations installed in coastal or high-humidity locations.
On-board chargers requiring corrosion-resistant interconnects.
Battery management interfaces combining power and signal.
The PA66 housing's corrosion-proof properties are especially valuable for EV chargers installed in coastal areas (salt spray), urban environments (road salt in winter), or industrial zones (chemical exposure). The IP68 sealing protects against rain and washing.For DC fast charging (100A+), we recommend larger industrial connectors specifically designed for high-current DC applications.
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