H5A2 Micro SD TF Card Module – SPI Interface, 3.3V/5V Compatible, 6-Pin

The H5A2 is a compact micro SD TF card module designed to add removable storage to Arduino, ESP32, and other microcontroller projects through a standard SPI interface. It accepts a supply voltage of 4.5V to 5.5V and includes an onboard LDO regulator that provides the 3.3V required by SD cards, along with a level-shifting circuit that makes the module compatible with both 3.3V and 5V logic systems.

The module exposes six pins—GND, VCC, MISO, MOSI, SCK, and CS—for straightforward wiring with female-to-female jumper cables. It supports Micro SD cards up to 2GB and Micro SDHC cards up to 32GB, and it works with the Arduino SD library for file-system-level read and write operations. Typical uses include sensor data logging, audio and video storage for small multimedia projects, and graphic data retention for compact display devices. The board measures 42 × 24 × 12 mm, weighs 5 g, and includes four M2 mounting holes with a 2.2 mm diameter for secure installation. This micro SD card module is a practical storage expansion accessory for projects with limited onboard memory.

1. Sensor data logging in IoT and environmental monitoring projects.
2. Audio and music storage for small sound systems.
3. Short video storage and playback in multimedia projects.
4. Graphic data storage for compact display devices.
5. General-purpose external memory expansion for Arduino and microcontroller boards.

1. Model: H5A2.
2. Interface: standard SPI.
3. Supply voltage: 4.5V to 5.5V DC.
4. Current consumption: 0.2 mA to 200 mA.
5. Interface logic level: 3.3V or 5V (level-shifting circuit included).
6. Onboard regulator: LDO 3.3V output.
7. Supported cards: Micro SD (up to 2GB) and Micro SDHC (up to 32GB).
8. Pin count: 6 (GND, VCC, MISO, MOSI, SCK, CS).
9. Dimensions (L × W × H): 42 × 24 × 12 mm.
10. Weight: 5 g.
11. Mounting: 4 × M2 holes, 2.2 mm diameter.