page_title: DC connector
section_title: Other DC connectors
hierarchical_section_title: DC connector / Extra-low voltage (under 120 VDC) / Other DC connectors
caption_attribution_description: English: Heathkit 11-pin power supply connector for tube radio equipment.
context_page_description: A DC connector is an electrical connector for supplying direct current power.
  Compared to domestic AC power plugs and sockets, DC connectors have many more standard types that are not interchangeable. The dimensions and arrangement of DC connectors can be chosen to prevent accidental interconnection of incompatible sources and loads. Types vary from small coaxial connectors used to power portable electronic devices from AC adapters, to connectors used for automotive accessories and for battery packs in portable equipment.
context_section_description: There are a number of similar design PC board power connectors, including Molex Mini-Fit SR, Molex Mini-fit jr., MOLEX MICROFIT and Molex SABRE connectors, and AMP DUAC connectors that look similar to each other.
  Some plugs with three, four, five or more pins are also called DC plugs. These were common on vacuum tube equipment and continue to be used where several voltages are supplied. On vacuum tube equipment the pins are normally on the equipment side of the join for safety reasons.
  Many mobile phones use DC connectors that are unique to the manufacturer, or even a specific phone. In the interest of improved interoperability of phone battery chargers, major manufacturers have agreed to standardize on the micro-USB connector for new phone chargers from 2010.
  Many manufacturers make special-purpose DC power connectors for battery packs, instruments, medical equipment, communications equipment and other devices.
  Power Pack (PP) series of batteries such as the PP3 nine-volt battery have circular and hexagonal terminals which mate with a "snap" connector with physically identical (but opposite-polarity) terminals.
  Special "octal" connectors with either 8 or 11 pins, almost identical to octal relay sockets or tube sockets, were used to connect power supplies to some tube audio amplifiers, transmitters, and transceivers (especially in amateur radio models). Female sockets were installed on the power supply and male sockets (with exposed pins) on the radio equipment. Cable assemblies with mating connectors were also readily available. These connections transferred anode positive voltage (typically 600 VDC for Heathkit, 800 VDC for Collins), grid negative bias (−130 VDC), 6.3 and 12.6 VAC for heaters (filaments), and control functions (remote mains switching).
caption: Heathkit power supply female connector for tube equipment
exif: {"Image Make": "NIKON CORPORATION", "Image Model": "NIKON D5200", "Image XResolution": "240", "Image YResolution": "240", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Lightroom 5.4 (Windows)", "Image DateTime": "2014:05:20 11:47:46", "Image ExifOffset": "216", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "976", "Thumbnail JPEGInterchangeFormatLength": "15393", "EXIF ExposureTime": "1/60", "EXIF FNumber": "8", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "2500", "EXIF SensitivityType": "Recommended Exposure Index", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2014:05:18 01:10:02", "EXIF DateTimeDigitized": "2014:05:18 01:10:02", "EXIF ShutterSpeedValue": "5906891/1000000", "EXIF ApertureValue": "6", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "24/5", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire", "EXIF FocalLength": "44", "EXIF SubSecTimeOriginal": "10", "EXIF SubSecTimeDigitized": "10", "EXIF FocalPlaneXResolution": "83841555/32768", "EXIF FocalPlaneYResolution": "83841555/32768", "EXIF FocalPlaneResolutionUnit": "3", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CVAPattern": "[2, 0, 2, 0, 0, 1, 1, 2]", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "44", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "High gain up", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0", "EXIF BodySerialNumber": "2582611", "EXIF LensSpecification": "[18, 55, 7/2, 28/5]", "EXIF LensModel": "18.0-55.0 mm f/3.5-5.6"}