M22 and M28 panel mount connectors solve different equipment layout problems. The right choice usually starts with panel opening size and port count, then moves to front interface, rear connection, cover requirement and sample validation.
Quick comparison
| Decision point | M22 single-head connector | M28 dual-head connector |
|---|
| Best fit | One compact external USB-A, USB 3.0 or Type-C service port. | Two USB or Type-C interfaces in one larger metal panel position. |
| Panel layout | Useful when the equipment needs one fixed service or data access point. | Useful when port density matters and the enclosure can support the larger opening. |
| Common applications | Control cabinets, smart equipment, diagnostic ports and compact service panels. | Test equipment, industrial devices and systems that need two external data ports. |
| RFQ focus | Front port, rear terminal, cover, panel thickness and mounting hole requirement. | Dual-port combination, rear connection path, panel opening and internal space. |
Choose M22 when one service port is enough
M22 single-head connectors are the first option for compact equipment panels. They support common USB-A, USB 3.0 and Type-C interface layouts while keeping the panel opening smaller than a dual-head assembly.
Choose M28 when the panel needs two ports
M28 dual-head connectors are better when a device needs two external interfaces in one mounting position. Typical combinations include dual USB-A, dual Type-C and mixed USB-A plus Type-C layouts.
RFQ checklist
- Mounting family: M22 or M28.
- Front interface: USB-A, USB 3.0, Type-C or mixed port layout.
- Rear connection: USB male, Type-C, XH2.54 terminal or cable/harness requirement.
- Cover requirement: dustproof, waterproof or no cover.
- Panel drawing, target quantity, sample schedule and application environment.