Part Number: DM3BT-DSF-PEJS

Manufacturer: Hirose Electric Co Ltd


Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of DM3BT-DSF-PEJS

Datasheet  DM3BT-DSF-PEJS datasheet
Category Connectors, Interconnects
Family Memory Connectors – PC Card Sockets
Manufacturer Hirose-Electric-Co-Ltd
Series DM3
Packaging Tape & Reel (TR)
Card Type Secure Digital – microSD?
Number of Positions 10 (8 + 2)
Connector Type Connector and Ejector
Insertion, Removal Method Push In, Push Out
Ejector Side
Mounting Type Surface Mount, Right Angle
Features Switch
Height Above Board 0.072″ (1.83mm)
Mounting Feature Reverse – Bottom
Contact Finish Gold
Contact Finish Thickness

DM3BT-DSF-PEJS Description

The DM3BT-DSF-PEJS is an 8-position female micro SD Card Socket with gold-plated copper alloy contacts and a black LCP insulator. The DM3 series connector incorporates metal shields, a push-push eject mechanism, and reverse on-board mounting on the opposite side of the board from where it is mounted. It is possible to appropriately re-insert the Card thanks to the innovative design of the card slot, which is currently undergoing patent review.

This design protects the connector from being damaged when the Card is attempted to be put in the wrong direction. Having four points of connection between the metal cover and the printed circuit board ensures a secure connection to the ground circuit and offers EMI protection. The connectors were made of high-strength materials, resulting in a solid structure despite their relatively tiny size. The card detection switch is set to an open position by default.

Key Features

  • The little size. These connections are the smallest available on the market due to their modest external dimensions and height above the board.
  • Protection for cards inserted in the opposite direction- The connector is safeguarded from damage caused by the card slot’s one-of-a-kind and patent-protected design, which permits correct reinsertion of the Card even when it has been attempted to be inserted backwards.
  • Configuration of ground and shield that is effective Having four different points of connection between the metal cover and the printed circuit board ensures a secure connection to the ground circuit and offers EMI protection. Construction that is both rigid and sturdy The connectors were made out of high-strength materials, which resulted in a solid structure despite their relatively tiny size. A switch for card detection Normally open describes the control that detects cards.

DM3AT and DM3BT (Push-Push, with ejection mechanism):

  • Protection against cards falling out of their sleeves Both the integrated card tray and the one-of-a-kind push insertion/push ejection mechanism, which has been patented, work together to avoid unintentional ejection or loss of playing cards. Despite their diminutive size, the connectors can eject the Card to a distance of 4.0 millimetres, making it easy to grip and remove the Card.
  • Open and visible termination leads The solder termination joints may be quickly inspected and reworked.

DM3CS (Hinge, manual, Push-Pull, without ejection mechanism):

  • Insertion of cards that is both easy and dependable A metal cover with a hinged flap that locates the Card and guides it as it is inserted and removed from the slot. When the cover is securely fastened, an audible and felt “click” indicates that the electrical and mechanical connections have been made.
  • Maintaining a dependable connection with the Card’s contact pads The contact areas will be cleaned thanks to the Card’s unique contact design and the sliding action.
  • Termination locations that are easily accessible Terminations made with contact solder may be subjected to inspection and rework.

DM3D (Push-Pull, manual, without ejection mechanism):

  • Partial card insertion holds Card will not fall out even when fully inserted. Feeling the full insertion and electrical/mechanical connection is a surefire way to know you’ve done it right.
  • Reachable tarmac-based destination points This layout makes advantage of a flexible inner lead system that may be modified. Contact solder terminations may be inspected and reworked.

Frequently Asked Questions

● What Does It Mean to Have a Micro Secure Digital Slot or Micro SD Slot?

A mobile phone or other portable devices should have a Micro Secure Digital slot (also known as a MicroSD slot), a small expansion slot. Adding a MicroSD card makes it possible to expand the available storage space.

The Secure Digital Association (SD Association) ensures that MicroSD, MiniSD, and SD all meet industry standards. The use of this standard as a data storage medium that does not require power has been embraced by various electronics companies.

● What is a microSD card?

The microSD card is the smallest flash memory card for consumers that is in use right now. It changes the standard Secure Digital (SD) card, but it still uses the same electrical connections. SD is an abbreviation for the term Secure Digital. As a result of this, microSD cards can now be used in standard SD card slots with the help of an adapter. MicroSD was developed to provide a more compact alternative for portable electronic devices.

● How microSD cards are different from SD

At the beginning of the 2000s, the standard SD card was proving too large for many different devices, such as smartphones, due to the need for ever-smaller portable electronics. The demand for ever-smaller portable electronics caused this. The SD card was replaced by the microSD card in 2005. The MicroSD card is approximately one-sixth the size of the SD card and roughly half as thick. A standard SD card is 32 millimetres by 24 millimetres by 2.1 millimetres, while a microSD card is 15 millimetres by 11 millimetres by 1 millimetres.


Female microSD Card Socket (model number: DM3BT-DSF-PEJS) with gold-plated copper alloy contacts, a black LCP insulator, and 8 slots that the user can access. The DM3 series connection can be put on the opposite side of the board thanks to metal shielding, a push-push eject mechanism, and reverse on-board installation. This allows the connector to be positioned in a more convenient location. Because of the innovative and patent-pending design of the card slot, it is possible to re-insert the Card correctly.

Because of how the connector is designed, it will not get damaged even if the Card is placed in the wrong direction. The four contact points between the metal cover and the printed circuit board (PCB) produce an EMI shield and a stable ground connection. Because of the high-strength materials used in constructing the connectors, they could have a compact design while still being exceptionally strong. The card detection switch is always in the “open” position when it’s first turned on.

Contact us at ICRFQ if you require any additional information or want to make an order for DM3BT-DSF-PEJS. We will see that you pay a fair amount for the product.

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