Gold-Plated Female Stackable Banana Jack Connectors – Metal Extension Couplers for Binding Posts & Test Leads

Gold-plated female stackable banana jack connectors (4mm) for extending test leads, coupling banana plugs in series, and creating custom test lead configurations. The stackable design accepts a 4mm banana plug on both ends — one end connects to the source (binding post, test lead, or instrument output); the other end accepts another banana plug, allowing multiple test leads or instruments to be connected to the same point simultaneously. Metal body provides low resistance and mechanical durability for high-current test applications.

Key Specifications

• Type: Female stackable banana jack (4mm)
• Body Material: Metal (brass or zinc alloy), nickel or gold-plated
• Contact Material: Brass, gold-plated
• Current Rating: 15–30A (depending on contact area)
• Voltage Rating: 1000V DC / 600V AC
• Accepts: 4mm banana plugs on both ends (stackable)
• Quantity: 4, 10, 20, or 40 pieces (select above)

Stackable Banana Jack Applications

• Test lead extension: Connect two test leads in series to extend reach without a separate extension cable.
• Multiple instrument connection: Connect two instruments (e.g., multimeter + oscilloscope) to the same test point simultaneously by stacking their banana plugs.
• Binding post adapter: Convert a binding post that accepts only banana plugs into a stackable connection point.
• Daisy-chain connections: Connect multiple loads or instruments to a single power supply output.

Frequently Asked Questions

What is the difference between stackable and non-stackable banana jacks?

Non-stackable banana jacks accept a banana plug on one end only — the other end is a solder terminal or wire connection. Stackable banana jacks (this product) accept banana plugs on both ends, allowing additional plugs to be inserted into the rear of the jack while it is connected to a source. This allows multiple instruments or test leads to share the same connection point without a separate splitter.

Can I use these connectors for high-current battery testing?

Yes. The 15–30A current rating supports battery load testing and high-current bench power supply connections. Ensure the banana plug-to-jack contact is clean and fully inserted — a partially inserted banana plug significantly increases contact resistance and causes heating at the connection point. For sustained high-current applications (above 20A), use heavy-duty banana jacks with larger contact area.

Are these compatible with standard 4mm banana plugs?

Yes. These jacks accept standard 4mm banana plugs used by Fluke, Keysight, Rigol, Tektronix, and other test equipment manufacturers. The 4mm banana plug is the universal standard for test and measurement equipment connections.

What is the maximum voltage for these connectors?

1000V DC / 600V AC. For high-voltage applications above 600V AC, use CAT III or CAT IV rated banana connectors specifically designed and tested for high-voltage safety. Standard banana connectors are not rated for high-voltage safety categories required by IEC 61010 for measurements on mains-connected equipment.

Typical Applications

• Test & measurement: Extending and stacking test leads on bench power supplies and multimeters
• Laboratory: Connecting multiple instruments to the same test point
• Battery testing: High-current connections for battery load and capacity testing
• Educational: Physics and electronics lab experiment connections
• DIY electronics: Custom test fixture connections and power distribution

Package Contents

4, 10, 20, or 40 pieces (select above) — gold-plated female stackable banana jack connectors.