DIN is an acronym for Deutsche Industry Norm which is the German standards organisation responsible for setting industrial standards for products made in Germany. Circular DIN plugs are available in 3 to 14 pins. The 5-pin version is available in either a 180° or a 240° pin-layout.
DIN Plug
| Model | A (OD) | B (L) | PINS |  |
| A | 13.2 | 9.2 | 3 pin | |
| B | 13.2 | 9.2 | 4 pin | |
| C | 13.2 | 9.2 | 5 pin | |
| D | 13.2 | 9.2 | 5 pin | |
| E | 13.2 | 9.2 | 6 pin | |
| F | 13.2 | 9.2 | 7 pin | |
| G | 13.2 | 9.2 | 8 pin |