The Y50DX series is a 5 pin circular connector built for the control side of a machine - the runs that carry commands, interlocks and feedback between a cabinet and the axis it drives. Five contacts cover a supply pair plus the signal lines a station needs without moving up to a larger shell, and the assembly is sealed against dust and water whether it sits on a robot arm, inside a machine enclosure or on a mast in the open.
The shell is electroless nickel-plated zinc alloy, which takes knocks and washdown without the plating lifting, and the contacts are machined from brass and gold-plated so their resistance stays where it started. This is a control-circuit connector rather than a power connector: the kind of run where a start/stop pair, a sensor supply and an interlock share one cable.
Two builds use the same 5-pin interface but finish the cable side differently. The field-attachable version ends in solder cups, for technicians terminating on site or building harnesses to length. The pre-wired version arrives as a ready-made cable assembly, for production builds that want the cable end identical on every unit. Most buyers take both: pre-wired units for the machine, solder-cup units for the field kit.
| Parameter | Value |
|---|---|
| Contact configuration | 5-pin layout optimized for control circuits |
| Current rating | 5 A per contact (maximum) |
| Voltage rating | 250 V AC/DC |
| IP protection | IP67 - dust-tight and protected against water immersion |
| Mating cycles | >=500 cycles without degradation |
| Contact resistance | =1000 MOhm at 500 VDC |
| Shell material | Electroless nickel-plated zinc alloy |
| Contact system | Gold-plated brass |
| Operating temperature | -40 °C to +105 °C |
Vibration is the failure mode that quietly ruins a circular electrical connector. Nothing breaks; the coupling simply backs off a few degrees and the contact resistance starts to drift. Three separate mechanisms hold this one together. The threaded coupling draws the halves together and keeps them there. A secondary lock stops the coupling ring from rotating once it is seated. And each contact is retained in its insulator so it cannot push back out of position under load.
Tested to the IEC 61373 vibration and shock profile, the connector takes 10 G of vibration across a 10-2000 Hz sweep and 100 G of mechanical shock without losing contact. That standard was written for railway rolling stock, and it is a useful benchmark for any application where the connector rides on the machine rather than sitting still in a cabinet: robot joints, machine-tool carriages, agricultural implements, transport refrigeration units.
What this means day to day is that the coupling does not need checking after every shift. Install it correctly once - coupling fully seated, secondary lock engaged - and it stays put until someone deliberately disconnects it.
The one habit worth building is a visual check of the secondary lock after the first run-in under load. A lock that was never fully engaged is the only realistic way a joint like this comes apart, and it takes seconds to confirm.
IP67 is the rating most buyers check first, so it is worth being precise about what it covers. The mated connector is dust-tight and survives temporary immersion in water, which is the demand a washdown bay, a rain-exposed mast or a machine base that occasionally floods puts on it. It is not a rating for continuous submersion, and the seal only works when both halves are clean and fully coupled.
Corrosion is the slower problem. The shell plating carries that duty, and the assembly is tested to ISO 9227 for 720 hours of salt spray - a duration that puts it in range for coastal installations, shipboard equipment and vehicle work where a thinly plated shell would already be showing rust. That duration is the kind of figure a harsh environment connector manufacturer publishes when the plating is meant to survive outside a cabinet.
UV exposure is covered to IEC 60068-2-5, so an outdoor installation does not turn the housing chalky or brittle after a couple of summers. Combined with the rated temperature span, that makes the connector usable on equipment that stands in the open all year rather than only in a controlled room.
Two habits keep the seal honest in service. Wipe the mating faces clean and dry before coupling, because grit trapped in the interface is the usual cause of a leak that later gets blamed on the connector. And keep side-load off the cable entry: the strain relief on the pre-wired build takes that load for you, while a solder-cup build carrying a heavy cable bundle needs its own cable support.
Two versions of the 5-pin connector are supplied, and the choice usually comes down to where the cable assembly is made rather than to any difference in electrical performance.
The Y50DX20-05TJP2 is the field-attachable version. Its contacts end in solder cups, so a technician strips and tins the conductors, solders them into the cups and assembles the shell on site. That suits repair work, prototype builds and cable assembly shops cutting cable to the exact length a machine needs. Soldering a cup is a small skill that rewards care: too much heat and the insulator softens, too little and the joint is dry. A bright, fully wetted cup with the insulation cut back cleanly is the standard to work to.
The Y50DX20-05ZKP2 arrives pre-wired with 28AWG PVC cable and a strain relief already fitted. For a production machine builder that removes a process step and a variable from the build: every unit arrives with the same termination quality, and the strain relief takes the pull and flex that would otherwise land on the solder joints. It also simplifies spares, because a replacement becomes a plug-in part rather than a re-termination job.
One point worth understanding before you choose. The contact rating applies to the contacts, not to the fitted cable. 28AWG is a signal-level conductor and the right match for control circuits carrying modest current. If a particular run draws heavy current continuously, tell us the load and we will confirm whether the pre-wired tail suits it or whether the field-attachable version with your own conductor is the better answer.
Most buyers order both: the pre-wired version for the machine build, the solder-cup version for the field kit. As a military grade connector supplier we can ship them together so the repair part matches the unit it belongs to.
Three approvals travel with this connector, and each answers a different question.
UL 1977 Component Recognition covers the connector as a component. It is the recognition a machine builder needs when the end product goes through its own UL assessment, and it usually takes the interconnect out of the scope of that evaluation.
RoHS 3 and REACH compliance cover restricted substances: the declaration a European distributor needs before the part can be sold into the EU, and the evidence an OEM needs for its own material declarations.
EN 61076-2-101 is the circular connector standard the series is built against, covering interface dimensions and mating requirements so a part from one production batch mates with a part from another.
Every claim made for this connector is tied to a named standard rather than to an adjective, which is what a harsh environment connector manufacturer should give you: the standard, the duration and the document behind it. If your quality file needs a declaration for a particular shipment, ask for it when the order is placed and it will be issued with the goods.
Specifying the right part is easier with an engineer on the other end of the conversation. Our technical team helps you match a requirement to the correct reference — comparing series, contact count, coupling and mounting style against the drawing or part number you already hold — and works through troubleshooting with you when a mated pair or an installed assembly does not behave as expected. We also advise on installation and commissioning practice, and coordinate sourcing, pre-shipment inspection and export documents through our supplier network, so what arrives matches what was agreed.
Yes. Both models share the same Y50DX20 5-pin interface, so a field-terminated half and a pre-wired half form a working pair with the same contact arrangement and the same coupling - the difference sits entirely on the cable side. Order them together where you can; as a military grade connector supplier we would rather check the mating arrangement against your wiring schedule before dispatch than have a technician find the mismatch on site.
The run length of the pre-wired build is confirmed with your sales contact when the order is placed, so tell us the figure you need rather than assuming a standard tail. If you are replacing a cable already in service, measure from the back of the shell to the flying end and quote that number - it is the dimension that decides whether the replacement dresses back into the same cable route.
It can be, provided the mating faces are treated properly. The seal lives in the interface between the two halves, so grit, swarf or a dried film of coolant on either face will hold them slightly apart and let water past. Wipe both faces, check the seal for cuts, and thread the coupling fully home before the secondary lock goes on. Salt water and washdown chemicals should be rinsed off rather than left to dry on the plating. This is the failure mode a harsh environment connector manufacturer designs the seal interface around, and it is almost always traceable to handling rather than to the part.
5 A is the rating of each contact, and there is no rule against loading all five at once - but the honest answer depends on the installation. Several loaded contacts inside a closed cabinet run warmer than one loaded contact on an open frame, and the conductor matters as much as the contact: the 28AWG cable on the pre-wired build is a signal-level conductor, not a 5 A power cable. On a 5 pin circular connector used for control circuits this rarely bites, because the current-carrying contacts sit alongside signal lines drawing milliamps. Send us the current per contact and the ambient temperature and we will confirm the loading before you commit to a build.
For a circular electrical connector in this class, life is shortened by handling more often than by electrical wear. Three things account for most early failures: contamination on the mating faces, which wears the seal and eventually the plating; coupling with grit in the threads, which damages the coupling ring; and side-load on the cable entry, which is exactly why the pre-wired version carries a strain relief. Mate and unmate with the cable supported, keep unmated halves covered, and the 500-cycle figure stays a long way from the real service life of a machine that is connected once and left alone.
The 5-pin layout suits control circuits, which is what this model is built for. If your circuit needs a different contact count or shell size, tell us how many ways you need and what each one carries, and we will point you to the matching family in the range - it covers MIL-DTL-26482, MIL-DTL-38999, the Y-series circular connectors, rectangular connectors and fiber optic parts, so there is usually a layout that fits without changing the enclosure.
