Single D-Cell PCB-Mount Battery Holder

Description

Description

A reliable and space-efficient spring contact designed to provide the negative terminal connection for D-cell batteries in electronic assemblies. Ideal for PCB mounting or tight battery compartment designs, this component ensures consistent conductivity and secure retention under vibration.

Key Specifications & Features

• Model / Part No.: 5251 (Keystone Electronics)
• Contact Type: Coil spring negative contact (spring action)
• Battery Size: D (R20) cell
• Number of Cells: 1 (single cell contact)
• Material: Steel base metal
• Plating / Finish: Nickel plating on contact surfaces for corrosion resistance
• Mounting Style: Case mounting / solder lug (intended for solder connection to circuit)
• RoHS Compliance: Yes
• Pack / Availability: Often available in single units or bulk; widely stocked by distributors such as Newark

Benefits & Applications

• Secure Battery Contact: The spring action ensures firm engagement with the negative terminal of a D-cell battery, maintaining electrical continuity even under movement or vibration.
• Compact & PCB-Friendly: Its small footprint and solder lug mounting make it suitable for integration into compact battery compartments and printed circuit boards.
• Reliable Material Finish: Nickel plating helps minimize oxidation and ensures consistent low-resistance contact over long service life.
• Standard D-Cell Compatibility: Designed specifically for D-cell (R20) batteries, so it fits standard battery holder arrangements and power circuits.
• Wide Use Cases: Ideal for battery-powered devices, equipment requiring replaceable D-cell batteries, test instruments, and backup power assemblies.

Usage & Installation Tips

1. Correct Orientation: Ensure that the spring side engages the negative (flat) end of the D-cell battery, and that the battery’s positive end mates with the complementary positive contact.
2. Proper Soldering: Use a soldering iron of suitable wattage to avoid overheating and damaging the spring or plating—use flux and proper lead cleanup.
3. Panel / Case Mounting: Secure the contact against movement (mechanical support or glue if needed) so that the spring retains alignment under insertion/removal cycles.
4. Inspect Contact Pressure: Periodically check that the spring maintains adequate pressure on the battery — if it weakens, the contact may require replacement.
5. Avoid Shorting: In densely packed assemblies, provide insulation or spacing to avoid accidental shorts with neighboring conductors or housing walls.

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