ONELINKMORE
onelinkmore BNC Female to Dual Banana Plug Adapter, 4mm Male Stackable Banana Plugs for Oscilloscope & Multimeter, 19mm (0.75 inch) Standard Spacing, RF Coaxial Connector for Lab & Ham Radio Pack of 2
onelinkmore BNC Female to Dual Banana Plug Adapter, 4mm Male Stackable Banana Plugs for Oscilloscope & Multimeter, 19mm (0.75 inch) Standard Spacing, RF Coaxial Connector for Lab & Ham Radio Pack of 2
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--- QUICK SPEC REFERENCE --- Product: BNC Female to Dual 4mm Banana Plug Adapter, 19mm Spacing SKU: OL1183-2X Connector A: BNC Female (bayonet lock, center socket) Connector B: Dual 4mm Banana Plugs (Male, stackable) Spacing: 19mm (0.75 inch) standard Compatible With: Fluke, Rigol, Siglent multimeters and oscilloscopes; standard 19mm binding post equipment Impedance: 50 Ohm Quantity: 2 adapters per pack Price: $6.98 In Stock: Yes ---
This adapter converts a BNC female input into two 4mm banana plugs at the standard 19mm (0.75 inch) spacing, allowing BNC-terminated coaxial cables and instrument outputs to connect to banana jack binding post equipment — multimeters, power supplies, LCR meters, and test fixtures with standard dual banana post inputs. The BNC female end accepts any BNC male plug with a quarter-turn bayonet lock, and the two banana plugs insert into standard 19mm-spaced binding post sockets on test and measurement equipment.
The 19mm center-to-center spacing is the IEC 61010 standard for dual banana plug test equipment connections, ensuring compatibility with binding post equipment from all major test equipment manufacturers including Fluke, Agilent/Keysight, Tektronix, Rigol, and Siglent. The stackable banana plug design allows additional test leads to be inserted into the back of each plug, enabling multiple instruments to share the same connection point simultaneously without disconnecting the primary connection.
This adapter is the complement to the BNC Male to Banana Jack adapter: use this BNC Female version when you need to terminate a BNC male cable at banana plug outputs (the BNC female end receives the cable's BNC male plug). Use the BNC Male version when you need to plug an adapter directly into a BNC female instrument port. Both serve the same functional purpose of bridging BNC coaxial and banana plug test standards, differing only in the BNC connector gender.
Frequently Asked Questions
This adapter is bidirectional — signal flows equally well in either direction. For receive applications, a BNC-terminated antenna cable's BNC male plug inserts into this adapter's BNC female end, and the banana plugs connect to a receiver's banana jack input terminals. For signal injection, a signal generator's banana plug output leads insert into the banana plugs, and the BNC female end connects to a BNC-input oscilloscope or test point via a BNC male cable. The adapter is passive and has no directionality.
Functionally yes — BNC-female to dual banana plug adapters with 19mm spacing serve the same purpose across brands. The 19mm spacing is a universal standard, so adapters from different manufacturers are physically interchangeable. The differences lie in materials (brass versus zinc), contact plating (gold versus nickel), and stackability of the banana plugs. This adapter uses standard materials appropriate for test bench use.
Fluke multimeters use 4mm banana jack inputs with the standard 19mm spacing. This adapter's banana plugs insert into those jacks, allowing a BNC-terminated cable or antenna to be connected to the multimeter's input terminals. This is useful for RF voltage measurement, connecting RF signal sources to the multimeter's frequency counter input (on models with that function), or adapting BNC-terminated calibration sources to the multimeter.
Stackable banana plugs have a 4mm socket in the back of the plug body. After inserting the plug into a binding post, additional banana plugs from other test leads can be inserted into the back of the stacked plug, creating a parallel connection at the same test point. This allows simultaneous connection of multiple instruments — for example, both a multimeter and an oscilloscope — to the same circuit node without requiring a signal splitter or additional wiring.
19mm is the dominant international standard for dual banana plug test equipment, specified in IEC 61010. Some older or non-standard equipment uses different spacing. Most professional test equipment (Fluke, Keysight, Tektronix, Rigol, Siglent) uses 19mm. Consumer audio equipment binding posts sometimes use wider spacing. If your equipment uses non-standard spacing, verify the measurement before assuming 19mm compatibility.
Many test scenarios require the same BNC-to-banana conversion at two points simultaneously — for example, connecting the two channels of a dual-channel oscilloscope to two different banana jack test points. The 2-pack also provides a spare for a frequently used bench adapter, since bayonet lock springs can wear after extensive use and banana plugs can loosen from their sockets over time in high-cycle bench applications.
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