MMC SD connector — miniature breakaway, 12 contacts, USB 3.0 Gen 1 compatible
• MINIATURE • USB 3.0 GEN 1 • BREAKAWAY
The MMC SD is a miniature stainless steel breakaway connector with 12 contacts, compatible with USB 3.0 Gen 1 high-speed data transmission. IP68 sealed and EMI/RFI shielded, it is optimized for the smallest ruggedized equipment — wearable systems, compact radios, and portable field devices — where data throughput, robustness, and minimal footprint must coexist.
USB 3.0 Gen 1 data transmission in a miniature, field-ready connector
The MMC SD combines miniaturization with high-speed data capability: USB 3.0 Gen 1 performance in a breakaway circular connector that fits the tightest equipment panels. Its mixed-gauge contact layout — 2 contacts at AWG 22 for power and 10 at AWG 28 for signals — supports both power delivery and data transmission within a single connector. Available with or without PCB, it adapts to custom equipment designs.
COMPACT
LOW PROFILE
USB 3.0 GEN 1
MECHANICAL AND CLIMATIC CHARACTERISTICS
| Locking | Breakaway |
| Operating temperature | -55°C to +125°C |
| Nbr of mating-unmating cycles | up to 5000 cycles |
| Sealing | IP68 connected and disconnected |
| Corrosion resistance (Salt spray) | Stainless steel : 96 hours |
| Fluid resistance | Hydrocarbon and oils |
ELECTRICAL CHARACTERISTICS
| Nbr. of contacts | 12 contacts |
| Gauge - AWG | 22 (2 cts) 28 (10 cts) |
| Types of contacts | PCB pins or solder cup |
| Operating voltage | 28 V max |
| Current rating per contact | 10 x 1A + 2 x 5A |
| Contact resistance | ≤20 mΩ |
| Insulating resistance | > 100 MΩ under 100VDC |
| Dielectric strength | 500 Veff à 50 Hz. |
| EMI RFI Protection | Yes |
MATERIALS
| Connector shell | Stainless steel |
| Connector shell plating | Sandblasting |
| Insert | Thermoplastic |
| Contacts | Copper alloy plated with gold over nickel |
| Shielding ring | Beryllium copper plated with gold over nickel |
| Backshell | Aluminum |
| Backshell plating | Black Chrome over nickel plating |
- Last update:10/05/2026
APPLICATIONS
- Land defense: wearable soldier systems, compact portable radios
- C4ISR: miniaturized communication devices with USB 3.0 data links
- Security: portable field equipment with high-speed data transfer requirements
- Civil aeronautics: miniaturized onboard systems
