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Home » NEWEST Products » New by Manufacturer » Hirose Electric » Hirose Electric MicroSD™ Card Connectors
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Home » Product Knowledge Center » Hirose Micro
DM3 Series MicroSD™ Card Connectors

The smallest connectors on the market for mobile phone terminations , digital cameras, PDAs, miniature information terminals, and any other portable device requiring the use of small size, high reliability microSD memory card connectors .

The Hirose Electric DM3 Series MicroSD ™ Card Connectors have extremely small external dimensions and the above-the-board height makes the connectors the smallest on the market. With three different card insertion/ejection types, all card connector s feature a unique card slot design that protects the connector s from damage due to a mis-insertion. Hirose Electric designed the MicroSD Card Connectors with high-strength materials to produce a strong, rigid structure with 4-contact points to the PCB to ensure a secure connection of the ground circuit and to provide EMI protection. Ideal for mobile phone terminals, digital cameras, PDAs, miniature information terminals, and any other portable device requiring the use of small-size high-reliability microSD memory card connectors .



View Products List
Hirose Electric DM3 Series MicroSD™ Card Connectors







798-DM3AT-SF-PEJM5

798-DM3BT-DSF-PEJS
798-DM3C-SF

798-DM3D-SF

Push-Push, with ejection mechanism, top board mounting (standard)

Push-Push, with ejection mechanism, bottom board mounting (reverse)

Hinge, Push-Pull, manual, without ejection mechanism, top board mounting (standard)

Push-Pull, manual, without ejection mechanism, top board mounting (standard)


Card fall-out prevention
  • Built-in card tray and the unique push insertion-push ejection mechanism (patent pending) prevent accidental card ejection or fall-out.
Exposed termination leads
  • Easy inspection and rework of the solder termination joints.
Materials, Finishes
  • Insulator: LCP, black, UL94V-0
  • Contacts: copper alloy, gold-plated contact area & lead area
  • Guide cover: stainless steel, gold-plated lead area
  • Other components: stainless steel, piano wire, nickel-plated

Card fall-out prevention
  • Built-in card tray and the unique push insertion-push ejection mechanism (patent pending) prevent accidental card ejection or fall-out.
Exposed termination leads
  • Easy inspection and rework of the solder termination joints.
Materials, Finishes
  • Insulator: LCP, black, UL94V-0
  • Contacts: copper alloy, gold-plated contact area & lead area
  • Guide cover: copper alloy, gold-plated lead area
  • Other components: stainless steel, piano wire, nickel-plated

Simple, reliable card insertion
  • Hinged metal cover provides location and guides the card during the insertion/removal. Closing of the cover confirms the electrical and mechanical connection with a tactile click sensation.
Reliable contact with the card contact pads
  • Unique contact design and card slide action will clean the contact areas of the card.
Materials, Finishes
  • Insulator: LCP, black, UL94V-0
  • Contacts: copper alloy, gold-plated contact area & lead area
  • Guide cover: stainless steel, tin plated

Partial card insertion hold
  • Card will not fall-out even when it is not fully inserted. Full insertion and electrical / mechanical connection is confirmed with a distinct tactile feel.
Accessible termination areas
  • An inner lead system that can be reworked is used in this design. Contact solder terminations may be inspected and reworked.
Materials, Finishes
  • Insulator: LCP, black, UL94V-0
  • Contacts: copper alloy, gold-plated contact area & lead area
  • Guide cover: stainless steel, tin plated


DM3 Series Specifications
Ratings

Current rating: 0.5A
Voltage rating: 125VAC

Operating Temp. Range: -25ºC to +85C (Note 1), Storage Temp. Range: -40ºC to +85ºC (Note 2)

Operating humidity range: RH 95%max. (No condensation)

Item Specification Conditions

1. Insulation resistance

1000 MΩ min. (initial value)

Measure at 500V DC

2. Withstanding voltage

No flashover or insulation breakdown

500V AC / 1 minute

3. Contact resistance

100mΩ max. (initial value)

1mA

4. Vibration

No electrical discontinuity of 100ns or longer
No damage, cracks, or parts dislocation

Frequency: 10 to 55 Hz, single amplitude of 0.75 mm,3 directions for 2 hours

5. Humidity

Contact resistance: 40 mΩ max. (change from initial value), Insulation resistance: 100MΩ min., No damage, cracks or parts dislocation

96 hours at 40±2ºC, and humidity of 90 to 95%

6. Temperature cycle

Contact resistance: 40mΩ max. (change from initial value), Insulation resistance: 100MΩ min., No damage, cracks or parts dislocation

-55ºC -> 5 to 35ºC -> 85ºC -> 5 to 35ºC, Times: 30 min. -> 5 min. -> 30 min. -> 5 min., 5 cycles

7. Durability

Contact resistance: 40 mΩ max. (change from initial value)

10,000 cycles, 400 to 600 cycles per hour (DM3AT, DM3B), 5,000 cycles, 400 to 600 cycles per hour (DM3C, DM3D)

8. Resistance to
soldering heat

No deformation of components affecting performance

Reflow: At the recommended temperature profile, Manual soldering: 350ºC for 3 seconds

Note 1. Includes temperature rise caued by current flow.
Note 2: The term "storage" refers to products stored for a long period prior to mounting and use.


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