The DM3 Series microSD Card Connectors are designed for extremely small size and high reliability, making them the smallest on the market with above-the-board height. These connectors feature reverse card insertion protection, an effective ground and shield configuration for EMI protection, and a rigid and strong construction. Available in various models (DM3AT, DM3BT, DM3CS, DM3D), they offer different insertion and ejection mechanisms including Push-Push with ejection, Hinge Push-Pull, and Push-Pull manual operation. All models are suitable for applications requiring compact and robust microSD card connectivity.
| Item | Specification | Conditions | Remarks |
|---|---|---|---|
| Current rating | 0.5A | ||
| Voltage rating | 125V AC | ||
| Operating temperature range | -25C to +85C | (Note 1) | Includes temperature rise caused by current flow. |
| Storage temperature range | -40C to +85C | (Note 2) | Products stored for long period prior to mounting and use. |
| Operating humidity range | RH 95% max. (No condensation) | ||
| Insulation resistance | 100M min. (Initial value) | Measure at 500V DC | |
| Withstanding voltage | 500 V AC / 1 minute | 1mA | No flashover or insulation breakdown |
| Contact resistance | 40m max. (change from initial value) | ||
| Vibration | 10 to 55Hz, single amplitude of 0.75mm, 3 directions for 2 hours | No damage, cracks or parts dislocation. | |
| Humidity | 96 hours at of 40 2C, and humidity of 90 to 95% | No damage, cracks or parts dislocation. | |
| Temperature cycle | -55C 5 to 35C 85C 5 to 35C Times : 30 min. 5 min. 30 min. 5 min. 5 cycles | No deformation of components affecting performance. | |
| Durability | 10,000 cycles (DM3AT, DM3B), 5,000 cycles (DM3C, DM3D) | 400 to 600 cycles per hour | |
| Resistance to soldering heat | Reflow: At the recommended temperature profile; Manual soldering: 350C for 3 seconds |
| Model | Type | Mounting | Ejection Mechanism | Card Fall-out Prevention | Card Insertion | Termination Areas |
|---|---|---|---|---|---|---|
| DM3AT | Push-Push | Top board mounting (Standard) | Yes | Built-in card tray, unique push insertion-push ejection (patented) | Exposed termination leads | |
| DM3BT | Push-Push | Bottom board mounting (Reverse) | Yes | Built-in card tray, unique push insertion-push ejection (patented) | Exposed termination leads | |
| DM3CS | Hinge, Push-Pull | Top board mounting (Standard) | No | Hinged metal cover provides location and guides card; tactile click sensation confirms connection. | Accessible termination areas | |
| DM3D | Push-Pull | Top board mounting (Standard) | No | Partial card insertion hold | Distinct tactile feel confirms full insertion. | Accessible termination areas |
| Series Name | Connector Type | Number of Contacts | Termination Type | Card Ejection Code |
|---|---|---|---|---|
| DM3 | AT: Push-Push (ejection mechanism), Top board mounting (Standard) | 8 | SF: Right-angle SMT (Standard) | PEJM5, PEJS (Push insert/push eject) |
| DM3 | BT: Push-Push (ejection mechanism), Bottom board mounting (Reverse) | 8 | DSF: Right-angle SMT (Reverse) | None: Manual card insertion/ejection |
| DM3 | CS: Hinge, Push-Pull (no ejection mechanism), Top board mounting (Standard) | 8 | SF: Right-angle SMT (Standard) | |
| DM3 | D: Push-Pull (no ejection mechanism), Top board mounting (Standard) | 8 | SF: Right-angle SMT (Standard) |
