M12 K-Coded Power Cable for 630 V AC Motor Feeds

Overview

A M12 K-coded power cable carries three-phase AC to small motors, distributed drives and inverter-fed loads over a connector footprint that is a fraction of a 7/8 inch or RC panel receptacle. The range covers overmolded cordsets in straight and right-angle versions, male and female, together with panel feedthrough bodies for passing a mains feed through an enclosure wall and field-attachable versions for electricians terminating exact lengths on site.

Key Specifications

Why K-coding exists

M12 connectors look alike from the outside, and that is the hazard. A sensor lead, a fieldbus drop and a mains motor feed can all sit on the same M12 thread, so the mechanical keyway inside the shell is what prevents a mistake. K-coding places the contacts and the key slot so a K-coded plug will not enter an A-coded receptacle, which means a 24 V proximity switch lead cannot be pushed into a three-phase motor outlet by an installer working in a poorly lit cabinet. The M12 power codings are defined in IEC 61076-2-111; check which edition applies before you write a specification around it, and verify the mating face against the receptacles already fitted to your machines.

K is a mains-voltage coding, and it exists so a motor feed cannot be pushed into a sensor outlet. The download center carries a two-page reference setting K alongside every other letter, with pole counts and the jobs each is specified for.

K-code 5-position pin map

Four conductors plus protective earth. On a three-phase build the earth contact is deliberately positioned to make first and break last.

Where the load does not need a neutral, the same five-position shell is used with a different assignment. That is a build to drawing, not a catalog item, so say which one you want.

The coding family, with the mains ones grouped

The power end of the family is where the ratings stop being interchangeable, so it is worth reading the voltage column carefully.

The 630 V AC and 16 A figures in that table are the values published for the coding as a standardized shell rating. They are not a claim about our part: your assembly is manufactured and accepted to the nominal values stated on your drawing, and where a number cannot be evidenced we will say so rather than quote it.

Where it gets installed

• Small three-phase AC motors and gear motors on conveyors and packaging lines
• Distributed drive nodes mounted on the machine rather than in the cabinet
• Variable frequency drive output runs where the motor sits a few meters away
• LED high bay luminaires and rooftop HVAC units fed from a local junction box
• Retrofit panels where an existing mains connector is being replaced with M12

Build options

Cordsets are offered as straight and right-angle overmolded versions in both male and female, with PUR or PVC jackets depending on whether the run sees oil, coolant, weld spatter or continuous flexing. Panel feedthrough receptacles let a mains feed pass through an enclosure wall without a terminal block, which removes a wiring step and a potential loose connection. Field-attachable screw and crimp versions allow installers to cut and terminate on the machine instead of ordering a fixed catalog length.

Specification points to confirm before quoting

Ratings for a mains-voltage connector are not interchangeable between suppliers: creepage distance, contact plating, stranding and jacket compound all affect the final figure. Send us the load current, ambient temperature, and whether the run flexes in service, and we will return the supplier datasheet that applies to the exact construction you are buying. Where a number cannot yet be evidenced, we will say so rather than quote a value we cannot support.

Typical applications for this M12 K-coded power cable

• Conveyor and packaging machine motors up to a few kilowatts
• Distributed drive nodes mounted on the machine frame
• LED high bay lighting and rooftop HVAC units
• Retrofit panels replacing a 7/8 inch or RC mains connector with M12

How to specify your build

1. Load current and voltage, and whether it is a motor or a heater.
2. Phases – three-phase with or without neutral.
3. Ambient temperature and whether the run flexes.
4. Body style – cordset, panel feedthrough or field-attachable.
5. Jacket – PUR or PVC, and what it is exposed to.
6. Length and quantity.

Workmanship and testing

M12 K-Coded Power builds are assembled and inspected to IPC/WHMA-A-620 Class 3 criteria, with ISO 9001 as the quality system over 32 to 12 AWG work. continuity and pinout are verified on each M12 assembly before packing, and seal checking is quoted whenever an ingress rating is on the drawing.

Every production run can ship with RoHS and REACH declarations and the electrical report agreed at quotation; see certifications and material declarations. UL styles and other named approvals are built to drawing: we source to the style you specify and document it, rather than asserting a listing we do not hold. This assembly is built on the four lines covered under our assembly lines in Longgang, with nothing in the build handed to an undisclosed subcontractor. Related reading: what automation programs ask for. Tooling is quoted separately, cut in-house rather than brokered out, and owned by you.

Custom builds and ordering

M12 K-Coded Power prototype builds start from 1 to 50 pcs and are out in 3 working days; production is quoted from 500 pcs at 14 working days after sample approval. Your part number and labeling go on OEM and ODM M12 shipments, and material certificates with first-article reports are available. We hold 100 sets of mold tooling in house, so a standard body needs no tooling time and a new one adds about 10 working days.

Related M12 power assemblies

• M12 S-Coded Power Cable for Single-Phase AC Loads
• M12 M-Coded Motor Cable with Integrated Brake Conductors
• M12 Power T-Code or L-Code DC Power Cable, 63 V DC
• M12 C-Coded AC Cable, Dual Keyway for AC Sensors and Actuators
• M12 L-Code 16A Cable for IO-Link Power and AGV Drives
• M12 Bulkhead Panel Connector with Pigtail, A, D and X Coding

Full range: circular M8 and M12 cable assemblies.

Frequently Asked Questions