The M16 Series Waterproof Connector is Reunion's mid-range industrial interconnect, designed to bridge the gap between compact M12 connectors and larger M20/M25 power connectors. Certified to IP67/IP68 sealing standards, this threaded circular connector combines a robust 16mm interface with environmental protection suitable for washdown environments, outdoor installations, and industrial equipment with moderate power requirements.
Contacts are machined from brass with selective gold plating, maintaining low and sable contact resistance over hundreds of mating cycles. Reunion manufactures the M16 series through a vertically integrated process—from precision machining through automated assembly and 100% electrical testing. Available in panel-mount and cable-mount versions, with solder or PCB terminations, the M16 series adapts to diverse equipment designs. For engineers requiring a connector that offers more current capacity than M12 but in a still-compact form factor, this connector provides a reliable, sealed interconnect solution.
| Feature | Benefit |
| IP67/IP68 Environmental Sealing | Withstands dust, temporary immersion, and extended immersion—reliable for washdown, outdoor, and marine installations. |
| 2 to 8-Pins Configurations | Supports simple power connections, multi-signal, and hybrid power-signal applications. |
| Hybrid 2+4 Pin Option | Combines power (2 pins, 10A) and signal (4 pins, 3A) in a single connector—reduces cable count and panel space. |
| Current Ratings up to 15A | Handles moderate power loads—suitable for motors, actuators, and LED lighting. |
| Threaded Locking Mechanism | Vibration-resistant mating—prevents loosening from machinery movement and thermal cycling. |
| Gold-Plated Brass Contacts | Low contact resistance (≤3mΩ) and corrosion protection—maintains performance in humid environments. |
| High-Temperature PA66 housing | -40°C to +105°C operation—covers industrial and outdoor temperature extremes. |
| Parameter | 2-pin | 3-pin | 4-pin | 5-pin | 6-pin | 7-pin | 8-pin | 2+4-pin |
| Voltage Rating | 250V | 250V | 250V | 250V | 125V | 50V | 50V | 250V+50V |
| Current Rating | 15A | 15A | 10A | 10A | 5A | 5A | 5A | 10A+3A |
| Wire Section | 0.75-1.5mm² | 0.75-1.5mm² | 0.5-1.0mm² | 0.5-1.0mm² | 0.25-0.5mm² | 0.25-0.5mm² | 0.25-0.5mm² | 1.5/0.5mm² |
Operating Temperature: -40°C ~ +105°C
Protection Rating:IP67 / IP68 (mated)
Housing Material: High-temperature thermoplastic
Contact Material: Gold-plated copper alloy
Contact Resistance: ≤3mΩ
Mating Cycles: ≥500
Flammability Rating: UL 94 V-0
All materials RoHS compliant
| Aspect | Reunion M16 Series | Premium European M16 Brands | Low-Cost Unbranded M16 |
| Price | Volume-friendly pricing | 3-4× higher | Cheaper upfront |
| Sealing Rating | IP67/IP68 – standard | IP67 typical | Unverified claims |
| Current Rating | Up to 15A | Up to 15A typical | Variable |
| Pin Options | 2~8pins plus hybrid 2+4pins | Limited range | Incomplete selection |
| 100% Electrical Testing | Every unit | Sample-based | Random or none |
| Traceability | ERP traceable from resin to finished connector | Yes | None |
| Lead Time | 10-17 days | 4-8 weeks | Unpredictable |
| Customization MOQ | Low (100 pieces) | High (500+) | Not offered |
| Technical Support | 24-hour response from 10-person engineering team | Good but slower | Limited |
| ISO Certifications | 9001, 14001, 13485 | Usually 9001 | Typically none |
| 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 M16 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 M16 production line operates under strict process controls. IP67/IP68 sealing is verified on every production batch through actual immersion testing. Test records, material certificates, and inspection reports are retained for each batch, supporting your quality audits and customer documentation requirements.
The 2+4 hybrid configuration combines two power contacts (rated 10A, 250V) and four signal contacts (rated 3A, 50V) in a single connector housing. This design offers significant advantages:
Reduces cable count – Instead of running separate power and signal cables, one cable carries both.
Saves panel space – One panel cutout replaces two.
Simplifies installation – One connector to mate instead of two.
Typical applications include motor drives (power + encoder feedback), LED luminaires (power + DALI control), and industrial sensors requiring both power and data. If your device requires >4A for power and also carries low-voltage signals, the 2+4 hybrid is often the most efficient solution.
Both ratings are available on the same connector design, but the practical difference is:
IP67 – Protected against temporary immersion (1m for 30 minutes). Suitable for most outdoor and washdown applications.
IP68 – Protected against continuous immersion (depth and duration specified by customer). Suitable for marine, submerged sensor, and flood-prone installations.
Reunion's standard M16 is IP67-rated. For IP68, we use enhanced O-ring materials and optional overmolding. Specify your expected immersion depth and duration (e.g., "IP68, 2m for 24 hours") and our engineering team will confirm suitability.
To achieve and maintain IP67 sealing, Reunion recommends:
Mating torque – Hand-tighten the coupling nut until the O-ring contacts the panel surface, then apply additional torque of 0.6-0.8Nm using a torque wrench. Do not exceed 1.0Nm.
O-ring inspection – Replace the O-ring if deformation, cracking, or hardening is visible.
Replacement schedule – Annually for daily washdown applications; every 2-3 years for standard industrial environments.
Cable bend radius – Maintain minimum 5× cable diameter at the connector entry.
Orientation – For outdoor/washdown applications, orient cable exit downward.
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