CR2032 3V Coin Cell Battery Holder Socket (DIP / Through-Hole)

Specifications

• Battery Compatibility: CR2032 (20mm diameter)

• Mounting Style: DIP / Through-Hole

• Pin Spacing: 20.00mm

• Pin Thickness: 0.30mm

• Outer Diameter: 23.00mm

• Total Length (with tab): 27.60mm

• Body Height: 7.60mm

• Housing Material: Black Plastic

Key Applications and Projects

• RTC (Real-Time Clock) Backups: Polling time data accurately requires a constant power source; this holder provides the necessary 3V backup when main power fails.

• SRAM Memory Retention: Keeping volatile memory active on classic gaming cartridges or custom synthesizer boards.

• Ultra-Low-Power Wearables: Serving as the sole, lightweight power source for simple LED badges or BLE (Bluetooth Low Energy) tracking tags.

Unlock New Capabilities (Project Evolution) The Custom Data-Logging Shield: Stop buying pre-made modules and design your own! If you are building a weather station that logs data to an SD card, you need accurate timestamps. You can design a custom Arduino "Shield" PCB that incorporates an SD card reader, an I2C RTC chip, and this exact CR2032 battery holder. By soldering this holder directly to your custom shield, you guarantee your datalogger will maintain accurate time for years, even if the primary battery bank dies during a winter storm!

PACKAGE INCLUDED

• 1 x CR2032 Coin Cell Battery Holder, 3V DIP

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What specific battery size does this holder accept? It is designed to hold standard CR2032 coin cell batteries.

2. What is the inner diameter of the battery compartment? The inner diameter is 20.50mm, ensuring a snug fit for 20mm coin cells.

3. What mounting style does this component use? It uses a DIP (Dual In-line Package) or through-hole mounting style.

4. Can this be used for surface mount (SMD) soldering? No, this specific version has pins that extend straight down and must be pushed through holes in a PCB.

5. What is the exact distance between the two solder pins? The pins are spaced exactly 20.00mm apart.

6. What is the total length of the holder? Including the extended positive terminal tab, the total length is 27.60mm.

7. What is the outer diameter of the circular housing? The outer diameter measures 23.00mm.

8. How tall will this sit on my circuit board? The main plastic body has a height of 7.60mm.

9. Which part of the holder is the positive terminal? The metal clip located at the top/side tab of the holder makes contact with the top of the battery, acting as the positive terminal.

10. Which part is the negative terminal? The dual-prong spring contact resting flat in the center of the base makes contact with the bottom of the battery, acting as the negative terminal.

11. Is a battery included with this purchase? No, it is just the plastic and metal battery holder socket. Batteries must be purchased separately.

12. How thick are the mounting pins? The metal mounting pins have a thickness of 0.30mm.

13. What is the width of the positive terminal extension tab? The extension tab on the side of the housing has a width of 6.10mm.

14. Does the holder regulate the voltage? No, it is a purely mechanical pass-through component. It outputs whatever voltage the inserted battery provides (typically 3V for a fresh CR2032).

15. Can I use a thinner battery, like a CR2025? While a CR2025 has the same 20mm diameter, it is 0.7mm thinner. The internal spring may provide enough tension to hold it, but this holder is specifically engineered for the thickness of a CR2032.

16. How do I insert the battery? Slide the battery at an angle under the plastic retaining lips on the side opposite the metal clip, then press down firmly until the top metal clip snaps over the edge of the battery.

17. How do I remove the battery? Use a fingernail or a non-conductive spudger to push the top metal clip slightly backward while lifting the battery upward.

18. What material is the holder housing made from? It is molded from durable, rigid black plastic.

19. Will this fit into a standard breadboard? The pins are thin enough to enter a breadboard, but because the pin spacing is 20.00mm, it will likely need to straddle the center dividing trench of the breadboard to fit properly.

20. Does this holder have an integrated power switch? No, it is a direct connection. If a battery is inserted, power is live on the pins.