Product Overview
Cal Test CT3134-2 Sheathed 4mm Banana Jack - 36A 1000V CAT III, Dual Set-Screw, Red, Made in France
Condition
Unused NOS. Inspected and ready to deploy. Three-piece polypropylene housing and nickel-plated brass contact pin are clean and pristine with no defects. Sourced from a government research facility. Photos show the specific unit you will receive.
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Product Overview
Cal Test Electronics CT3134-2 is a 4mm sheathed in-line banana jack built for DIY test lead assembly and field repair. Solderless dual set-screw termination accepts up to 12 AWG wire and tightens with a standard 1.5mm hex wrench - no soldering iron needed. The fully sheathed polypropylene housing meets 1000V CAT III requirements, covering the internal brass contact pin to prevent accidental contact during high-voltage work. Made in France.
Key Features
- Connector type: 4mm banana jack (female), fully sheathed
- Termination: solderless dual Allen-head set-screw (1.5mm hex wrench)
- Voltage rating: 1000V CAT III
- Current rating: 36A maximum continuous
- Wire accommodation: up to 12 AWG (2.5mm max conductor diameter)
- Insulation clearance: wire jackets up to 4.0mm outer diameter
- Contact material: brass, nickel-plated
- Insulation material: polypropylene (PP)
- Operating temperature: -20°C to +80°C
- Color: red - industry standard positive/hot line identification
- Three-piece modular housing design
- Made in France
Applications
- Building custom test leads for multimeters, oscilloscopes, or bench power supplies without a soldering station
- Repairing a damaged test lead in the field using only a hex wrench - splice in a fresh connector and get back to work
- Constructing differential measurement extensions for lab setups that need a longer positive run
- Wiring load-bank or power supply connections where 36A capacity and CAT III compliance are both required
- Home lab builders who want a legitimate safety-rated banana connector for higher-voltage experiments without advanced soldering skills
- Audio hobbyists using 4mm banana connectors for speaker binding post wiring and DIY interconnects
Frequently Asked Questions
What tool do I need to install this connector?
A 1.5mm hex (Allen) wrench. Insert the stripped wire conductor into the barrel, position it under the set-screws, and tighten both screws to secure the connection. No soldering required.
What wire sizes are compatible?
Conductor up to 2.5mm diameter (12 AWG maximum). The bore also accepts wire jackets up to 4.0mm outer diameter, so most standard test lead cable fits without stripping back additional insulation.
Is this a jack or a plug - which end mates with my test lead?
This is the jack (female). It receives a standard 4mm banana plug. Use it as the in-line female termination on your cable run; the mating plug inserts into it from your instrument or binding post.
Does it come in other colors?
The CT3134 series is available in multiple colors for polarity coding. The -2 suffix designates red. Black (CT3134-0), yellow, green, blue, and white variants exist in the same series if you need a matched set.
Is there a solder version of this connector?
Yes. The CT3134-S-2 is the solder-termination variant in red. This listing is for the solderless set-screw version, CT3134-2.
A connector that goes together with a hex key instead of a soldering iron is the kind of thing you appreciate most at 11pm when the lead fails and the iron is cold. This one is rated for the serious work and ready to go the moment it arrives.
