Bussmann TB300-05STQC1 Five-Po...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$86.57
$43.41
Bussmann TB300-05STQC1 Eaton TB300 series panel mount terminal block connector, Breakdown voltage 7500V, 600V, 30A, Barrier, Five-pole, Black, Molded thermoplastic base, tin-plated brass terminal, stainless steel philslot screw - TB300-05STQC1

Bussmann TB300-05STQC1 Five-Pole Barrier Terminal Block, 600V, 30A

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Model: TB300-05STQC1
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$43.41
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Bussmann TB300-05STQC1 Five-Pole Barrier Terminal Block, 600V, 30A

The Bussmann TB300-05STQC1 is a panel mount terminal block connector from the Eaton TB300 series, engineered for reliable five-pole barrier-style wiring connections in industrial and commercial control panels. Rated for 600V with a 7500V breakdown (dielectric withstand) voltage and a 30A current rating, this connector combines a molded black thermoplastic base with tin-plated brass terminals and stainless steel philslot screws for secure, corrosion-resistant terminations. Compact panel-mount dimensions of 3.25 x 1.33 x 0.81 IN make it easy to integrate into enclosures where panel space is limited.

Key Features

  • Five-Pole Barrier Configuration: Provides five isolated, barrier-separated wiring positions on a single molded block for organized, code-compliant panel wiring.
  • Voltage Rating: Rated 600V with a 7500V breakdown voltage, giving dependable dielectric strength for demanding control-panel environments.
  • 30A Current Rating: Sized for standard control and power wiring circuits typical of panel-mount terminal block applications.
  • Manufacturer-Listed Amp Rating: Eaton documentation for this TB300 series part also lists a 300 A rating; refer to manufacturer documentation to confirm the correct rating for your specific application.
  • Durable Construction: Molded black thermoplastic base resists impact and provides reliable electrical insulation between adjacent terminals.
  • Tin-Plated Brass Terminals: Deliver strong electrical conductivity along with corrosion resistance for long-term service life.
  • Stainless Steel Philslot Screws: Corrosion-resistant hardware secures wire connections firmly under vibration and thermal cycling.
  • Compact Panel-Mount Footprint: Measures 3.25 x 1.33 x 0.81 IN, sized to fit efficiently within crowded panel enclosures.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Industrial and Commercial Control Panel Wiring
  • Motor Control Center Terminations
  • Panelboard and Enclosure Wiring Connections
  • OEM Electrical Panel Manufacturing
  • Power Distribution and Control Circuit Wiring

Why Bussmann?

Bussmann, an Eaton brand, builds the TB300 series terminal block connectors with a molded thermoplastic base, tin-plated brass terminals, and stainless steel philslot screws for dependable, code-compliant performance in professional electrical panel work. The barrier-style five-pole design along with its 600V rating and 7500V breakdown voltage make it a solid choice for organized, durable panel-mount wiring.

Manufacturer Resources

Product Specs

Department:
Electrical
Product Type:
Terminal Block
Product Group:
0
Product Subgroup:
0

Bussmann TB300-05STQC1 – Frequently Asked Questions

1) Will the Bussmann TB300-05STQC1 terminal block fit in a crowded control panel enclosure?
The TB300-05STQC1 barrier terminal block measures 3.25 x 1.33 x 0.81 inches, so it takes up very little DIN-panel real estate. It is a panel mount block, meaning it fastens to the back panel or subpanel rather than clipping onto a rail, so plan for flat mounting surface and screwdriver access to the philslot screws from the front.
2) What voltage and current is the Bussmann TB300-05STQC1 rated for?
600V and 30A, with a 7500V breakdown (dielectric withstand) rating. That covers the usual control and power circuits run inside industrial and commercial panels, motor control centers, and panelboard terminations.
3) How many circuits can I land on the Bussmann TB300-05STQC1?
Five. It is a five-pole barrier block, so you get five isolated wiring positions separated by molded barriers on one piece. Each pole gives you a landing point on both sides of the block for through connections. If you need more than five circuits, you would gang additional blocks rather than expand this one.
4) Is a barrier-style terminal block the right choice, or should I use a DIN rail block?
Barrier blocks like the TB300-05STQC1 are fixed-pole, screw-and-barrier devices that mount flat to a panel. You pick them when you want a defined pole count in a known location, ring or spade lugs under a screw head, and molded barriers keeping adjacent phases apart. DIN rail blocks are the better answer when the circuit count changes over the life of the panel or when you want to add and remove poles in the field. For a fixed five-circuit termination at 600V, the barrier block is the simpler build.
5) What is the exact part number to order for the five-pole Eaton TB300 barrier block?
Order Bussmann TB300-05STQC1. That is the Eaton TB300 series five-pole panel mount barrier block rated 600V, 30A. The 05 in the number is the pole count, so a different pole count is a different part number in the series.
6) What are the terminals and screws made of on the Bussmann TB300 barrier block?
Terminals are tin-plated brass and the screws are stainless steel philslot, set into a molded black thermoplastic base. That combination matters in damp or washdown panels and in installations that see vibration or thermal cycling, since neither the terminal plating nor the screw head corrodes the way plain steel hardware does.
How fast can I get the Bussmann TB300-05STQC1 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann TB300-05STQC1 come with a warranty?
Absolutely. The Bussmann TB300-05STQC1 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann TB300-05STQC1?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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