The product shown is a standard 4 mm male banana plug, commonly used for test leads, laboratory equipment, power supplies, electrical trainers and measurement instruments. The exact electrical rating varies by manufacturer and construction, so the following is a typical catalogue specification for this style. Comparable 4 mm plugs are commonly rated around 10–30 A and 30–60 V, depending on the model.
Product Specification
Parameter Specification
Product Name 4 mm Banana Plug
Product Type Male Banana Plug
Connector Size 4 mm
Gender Male
Contact / Pin Diameter 4.0 mm
Connection Type Cable Mount
Termination Screw / Solder type, depending on variant
Contact Material Brass / Copper Alloy
Contact Plating Nickel Plated
Spring Contact Yes
Insulation Material PVC / ABS / Acetal, depending on variant
Body Material Insulated moulded plastic
Rated Current Typically 10–30 A
Rated Voltage Typically 30 VAC / 60 VDC for standard versions
Contact Resistance ≤10 mΩ typical
Cable Compatibility Up to approximately 2.5–4 mm conductor/cable, depending on termination
Operating Temperature Approximately −20°C to +110°C, depending on material
Mounting Cable Mount
Colour Options Red, Black, Green, Yellow, Blue
Application Test & Measurement / Electrical Connection
Mating Socket Standard 4 mm Banana Socket
RoHS Available in RoHS-compliant versions
For example, a standard 4 mm screw-on model specifies 10 A, 30 VAC/60 VDC, nickel-plated brass contacts, spring contact and up to 2.5 mm² conductor capacity. A different RS PRO 4 mm model is specified at 24 A maximum, 30 VAC/60 VDC and 39 mm nominal length, demonstrating why the exact model should be confirmed before printing a rating on a catalogue.
Mechanical Dimensions — Typical
Dimension Typical Value
Pin Diameter 4 mm
Overall Length Approx. 39–65 mm
Body Diameter Approx. 8–12 mm
Cable Entry Approx. 2.5–4 mm
Plug Type Straight
Stackable Available in stackable versions
Some commercial 4 mm plugs are approximately 39 mm long, while heavier-duty models can be around 65 mm, so the exact dimensions depend on the construction.
Features
Standard 4 mm banana plug
Spring-loaded contact for reliable mating
Nickel-plated contact for corrosion resistance
Insulated body for safer handling
Colour-coded body for polarity identification
Suitable for flexible test leads
Compatible with standard 4 mm banana sockets
Available as screw, solder, clamp or push-lock termination
Stackable versions available
Suitable for electrical test and measurement applications
Typical Applications
Laboratory power supplies
Multimeters and test equipment
Electrical trainer kits
Test and measurement instruments
Battery testing
Power supply connections
Control panels
Audio/electronic equipment
Prototype and development equipment
Industrial electrical testing
Colour Identification
Red – Positive (+)
Black – Negative (−) / Common
Green – Earth / Ground
Yellow – Auxiliary / identification
Blue – Negative / auxiliary
Catalogue-Ready Specification
4MM BANANA PLUG
Type: Standard Male Banana Plug
Size: 4 mm
Pin Diameter: 4.0 mm
Contact: Brass/Copper Alloy, Nickel Plated
Spring: Spring Contact
Body: Insulated PVC/ABS/Acetal
Termination: Screw/Solder Type
Current Rating: 10–30 A*
Voltage Rating: 30 VAC / 60 VDC*
Contact Resistance: ≤10 mΩ*
Cable Size: Up to 2.5–4 mm²*
Temperature: Approx. −20°C to +110°C*
Colours: Red / Black / Green / Yellow / Blue
Mounting: Cable Mount
Mating: 4 mm Banana Socket
Applications: Test Leads, Laboratory Equipment, Power Supplies, Electrical Trainers & Test Instruments.
* Rating and dimensions must be confirmed against the exact manufacturer/model, because 4 mm banana plugs are available in substantially different electrical ratings. For example, specialist versions can be rated as high as 30 A / 750 V, while ordinary versions have much lower ratings.
Product Specification
Parameter Specification
Product Name 4 mm Banana Plug
Product Type Male Banana Plug
Connector Size 4 mm
Gender Male
Contact / Pin Diameter 4.0 mm
Connection Type Cable Mount
Termination Screw / Solder type, depending on variant
Contact Material Brass / Copper Alloy
Contact Plating Nickel Plated
Spring Contact Yes
Insulation Material PVC / ABS / Acetal, depending on variant
Body Material Insulated moulded plastic
Rated Current Typically 10–30 A
Rated Voltage Typically 30 VAC / 60 VDC for standard versions
Contact Resistance ≤10 mΩ typical
Cable Compatibility Up to approximately 2.5–4 mm conductor/cable, depending on termination
Operating Temperature Approximately −20°C to +110°C, depending on material
Mounting Cable Mount
Colour Options Red, Black, Green, Yellow, Blue
Application Test & Measurement / Electrical Connection
Mating Socket Standard 4 mm Banana Socket
RoHS Available in RoHS-compliant versions
For example, a standard 4 mm screw-on model specifies 10 A, 30 VAC/60 VDC, nickel-plated brass contacts, spring contact and up to 2.5 mm² conductor capacity. A different RS PRO 4 mm model is specified at 24 A maximum, 30 VAC/60 VDC and 39 mm nominal length, demonstrating why the exact model should be confirmed before printing a rating on a catalogue.
Mechanical Dimensions — Typical
Dimension Typical Value
Pin Diameter 4 mm
Overall Length Approx. 39–65 mm
Body Diameter Approx. 8–12 mm
Cable Entry Approx. 2.5–4 mm
Plug Type Straight
Stackable Available in stackable versions
Some commercial 4 mm plugs are approximately 39 mm long, while heavier-duty models can be around 65 mm, so the exact dimensions depend on the construction.
Features
Standard 4 mm banana plug
Spring-loaded contact for reliable mating
Nickel-plated contact for corrosion resistance
Insulated body for safer handling
Colour-coded body for polarity identification
Suitable for flexible test leads
Compatible with standard 4 mm banana sockets
Available as screw, solder, clamp or push-lock termination
Stackable versions available
Suitable for electrical test and measurement applications
Typical Applications
Laboratory power supplies
Multimeters and test equipment
Electrical trainer kits
Test and measurement instruments
Battery testing
Power supply connections
Control panels
Audio/electronic equipment
Prototype and development equipment
Industrial electrical testing
Colour Identification
Red – Positive (+)
Black – Negative (−) / Common
Green – Earth / Ground
Yellow – Auxiliary / identification
Blue – Negative / auxiliary
Catalogue-Ready Specification
4MM BANANA PLUG
Type: Standard Male Banana Plug
Size: 4 mm
Pin Diameter: 4.0 mm
Contact: Brass/Copper Alloy, Nickel Plated
Spring: Spring Contact
Body: Insulated PVC/ABS/Acetal
Termination: Screw/Solder Type
Current Rating: 10–30 A*
Voltage Rating: 30 VAC / 60 VDC*
Contact Resistance: ≤10 mΩ*
Cable Size: Up to 2.5–4 mm²*
Temperature: Approx. −20°C to +110°C*
Colours: Red / Black / Green / Yellow / Blue
Mounting: Cable Mount
Mating: 4 mm Banana Socket
Applications: Test Leads, Laboratory Equipment, Power Supplies, Electrical Trainers & Test Instruments.
* Rating and dimensions must be confirmed against the exact manufacturer/model, because 4 mm banana plugs are available in substantially different electrical ratings. For example, specialist versions can be rated as high as 30 A / 750 V, while ordinary versions have much lower ratings.
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