M5 Series Waterproof Connector

The M5 Series Waterproof Connector is Reunion's most compact industrial interconnect, purpose‑built for applications where miniaturization is paramount. Certified to DIN EN 61076‑2‑105, this circular connector combines a space‑saving 5mm interface with industrial‑grade sealing to ensure reliable performance in demanding environments. The connector's threaded locking mechanism provides secure mating under vibration, while the all‑metal housing delivers EMI shielding and mechanical durability. Available in 2‑, 3‑, and 4‑pin configurations, the M5 series supports both signal and low‑power applications. Its IP67 rating protects against dust and temporary immersion, making it suitable for factory floors and outdoor installations where moisture and particulates are present. Contacts are fabricated from brass with gold plating, ensuring consistent low‑resistance connections over the product's lifetime. Reunion manufactures the M5 series in‑house, controlling every step from precision machining to final assembly and 100% electrical testing. The connector's compact form factor — the smallest in the industry — allows engineers to place sensors in locations previously impossible, enabling denser automation designs without sacrificing reliability.

Key Selling Points

The M5 series delivers essential features that make it the connector of choice for miniaturized sensors and compact electronic devices.

Technical Specifications

All materials are RoHS compliant. Every M5 connector undergoes 100% inspection for continuity, insulation resistance, and dielectric withstand before leaving Reunion's factory. Environmental reliability testing — including salt spray, thermal cycling, and humidity exposure — is performed on sample batches to validate batch quality.

Competitive Advantages — Why Choose Reunion's M5 Series

The M5 Series Waterproof Connector occupies a unique position in the miniature connector market — offering the compactness of small‑form‑factor designs with the quality assurance of a certified manufacturer. Below is a direct comparison with typical alternatives.

What this means for you: With Reunion's M5 series, you pay less than premium brands but receive documented quality and compliance that budget suppliers cannot match. The combination of full DIN compliance, verified IP67 sealing, 100% testing, and factory‑direct support gives you supply chain confidence for volume production.

Certifications & Quality Assurance

Reunion's M5 production line operates under strict process controls, with every batch traceable via our ERP system — from raw material to finished connector. In‑house testing includes 100% electrical verification and sample‑based environmental testing (salt spray, vibration, thermal shock) per batch to ensure compliance with DIN standards.

Packaging, Logistics & After-Sales Support

Frequently Asked Questions (FAQ)

The M5 connector's 100‑cycle mating rating seems low compared to other series. Does this reflect on its reliability?

The 100‑cycle specification is a conservative minimum per DIN EN 61076‑2‑105 for the M5 form factor. Reunion's internal testing consistently achieves 300‑500 mating cycles with contact resistance staying within specification. The lower rating reflects the connector's miniature size — the contact insertion/withdrawal forces and mechanical tolerances inherent to the 5mm interface — not a quality compromise. For comparison, the M5 is designed for periodic maintenance connections (e.g., sensor replacement every 1‑2 years), not daily repeated mating. If your application requires frequent connector disconnection (>500 cycles/year), we recommend considering the M8 or larger series where greater contact surface area supports higher cycle counts.

Can Reunion provide the M5 series with custom cable assemblies, including overmolded strain relief?

Yes. Reunion offers pre‑assembled cable harnesses with M5 connectors on one or both ends. You can specify:

- Cable type — PVC (standard, cost‑effective), PUR (oil‑resistant, more flexible), or silicone (high‑flex, high‑temp).

- Length — Any custom length with ±10mm tolerance.

- Gauge — 26AWG to 30AWG (standard), with other gauges available upon request.

- Strain Relief — Overmolded rubber boots available at the connector backshell (minimum order 100 pieces for custom overmolding).

- Lead time — Custom cable assemblies typically require 7‑10 days for samples, 15‑20 days for production orders.

Provide your cable specification and wiring diagram, and our engineering team will confirm feasibility within 48 hours.

What is the difference between the M5 connectors you offer and the "M5 sealed" alternatives from other suppliers?

Reunion's M5 series is manufactured to full DIN EN 61076‑2‑105 specifications, ensuring mechanical and electrical interchangeability with other compliant brands. Our quality differentiators include:

- Tighter tolerance control — Critical dimensions are controlled to ±0.02mm vs. industry typical ±0.05mm, ensuring consistent mating feel.

- 100% electrical testing — Every connector is tested for continuity and insulation, not sample‑based.

- Superior plating — Gold plating thickness of ≥0.3µm (vs. 0.15‑0.2µm common in budget alternatives) for better corrosion resistance and consistent contact resistance.

- In‑house cable assembly — We control the entire supply chain, eliminating unknown variables from third‑party harness makers.

These practices are backed by Reunion's ISO 9001 and ISO 13485 certified quality systems — documented, audited, and traceable.