Banana Plugs & Jacks
Banana Plugs & Jacks
Banana plugs and jacks are among the most widely used electrical connectors in test and measurement environments. The standard 4 mm banana plug format is found on virtually every bench multimeter, power supply, and component tester, offering a reliable, low-resistance connection that can be quickly mated and unmated. For high-current and ultra-high-current applications, reinforced banana connector assemblies with PTFE insulation handle currents from hundreds to well over a thousand amperes, making them essential in power semiconductor characterization and battery testing.
Ultra-high-current banana-to-banana cables and banana-to-open-end cables — such as those from Keysight's N1254A series — are specifically engineered for parametric testing of power devices, battery cells, and low-resistance components where minimizing contact resistance is critical to measurement accuracy. PTFE standoffs with integrated banana plugs provide electrical isolation between the device under test and the surrounding measurement fixture without introducing additional resistance.
Typical Applications
- High-current parametric testing of power MOSFETs, IGBTs, and battery cells in semiconductor characterization
- Power supply output connections in bench testing and automated test equipment racks
- Component testing with LCR meters and resistance bridges requiring low-contact-resistance terminations
- Fixture construction for device-under-test electrical isolation using insulating PTFE standoffs
- General-purpose instrument interconnection on electronics laboratory benches
Popular Brands
Keysight manufactures the N1254A series of ultra-high-current banana cables and PTFE standoffs designed for use with semiconductor parameter analyzers and precision source-measure units. Pomona Electronics and Mueller Electric are established suppliers of standard 4 mm banana plug accessories for general laboratory and educational use.
