CR2032 / CR2025 3V Coin Cell RTC Battery Socket Holder

CR2032 / CR2025 3V Coin Cell RTC Battery Socket Holder is a precision PCB-mount coin cell retainer socket engineered for CR2032 / CR2025 / CR2016 (Ø20mm Coin Cells). Featuring a high-temperature LCP/PBT thermoplastic insulator housing and phosphor-bronze gold/nickel-plated spring contacts in a horizontal flat low-profile pcb mount footprint, it provides reliable, vibration-proof 3V battery retention for DS1307 and DS3231 Real-Time Clock (RTC) modules, PC motherboards, data loggers, and CMOS memory backup circuits.

Key Features:

• Exact Fit for CR2032 / CR2025 / CR2016: Molded retainer rim and dual-point spring contacts hold the coin cell securely while allowing thumb-tip ejection when replacement is needed.
• Horizontal Flat Low-Profile PCB Mount: Designed for through-hole (dip) 2-pin pcb mount (20mm pin pitch) assembly on single- or double-sided printed circuit boards.
• Mechanical Reverse-Polarity Protection: Recessed negative bottom pad and side-wall positive spring clip physically prevent an upside-down coin cell from making electrical contact.
• Low-Resistance Phosphor-Bronze Contacts: Gold/tin-nickel plated spring contacts ensure decades of oxide-free microamp RTC current flow.
• High-Temperature Solderability: Heat-resistant UL94-V0 housing withstands wave/reflow or hand soldering without deforming.

Technical Specifications:

• Compatible Coin Cells: CR2032 / CR2025 / CR2016 (Ø20mm Coin Cells) (Battery Not Included)
• Mounting Style: Through-Hole (DIP) 2-Pin PCB Mount (20mm Pin Pitch)
• Mounting Orientation: Horizontal Flat Low-Profile PCB Mount
• Contact Material: Phosphor Bronze / Spring Steel with Tin-Nickel or Gold Flash Plating
• Insulator Housing: High-Temperature UL94-V0PBT / LCP Thermoplastic
• Contact Resistance: < 30 mΩ
• Operating Temperature Range: -40°C to +105°C

Mechanical Specifications:

• Retention Mechanism: Snap-In Latch with Side Positive Spring Clip & Bottom Negative Finger
• Housing Color: Matte Black / Brown

Dimensions:

• Length: 22.5 mm
• Width: 21.5 mm
• Height: 5.0 mm
• Weight: ~1.5 g

Pinout and Wiring:

• Positive Pin (+): Connected to the side/top perimeter clip that contacts the outer (+) case of the coin cell (insert coin cell with “+” engraving facing UP/OUT).
• Negative Pin (-): Connected to the center base spring finger that contacts the bottom (-) face of the coin cell.

Datasheet Reference:

• Component Class: IEC 3V Lithium Coin Cell PCB Retainer Socket (BS-7 / CR2032-DIP / CR1220-SMD Series)

Commonly Used in:

• DS1307, DS3231, and PCF8563 Real-Time Clock (RTC) Modules
• STM32 VBAT & PC Motherboard CMOS BIOS Backup
• GPS Module Hot-Start Backup & Smart Energy Meters
• Compact Data Loggers and Wearable Medical Devices

Applications:

• Specifically designed for DS1307 and DS3231 Real-Time Clock (RTC) modules, PC motherboards, data loggers, and CMOS memory backup circuits.
• Allows years of uninterrupted timekeeping on Arduino, ESP32, and Raspberry Pi RTC shields when mains power is disconnected.
• Enables tool-free coin cell replacement without desoldering tabbed batteries.

Equivalent Models:

• CR2032 Coin Cell Battery Holder SMD: Surface-mount (SMD) horizontal socket for Ø20mm CR2032 cells.
• CR2032 3V Lithium Coin Battery: Companion 3V 210mAh lithium coin cell that snaps directly into CR2032 holders.

Package Includes:

• 1 × CR2032 / CR2025 3V Coin Cell RTC Battery Socket Holder