Bussmann TB300-21 21-Pole Doub...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$111.09
$71.85
Bussmann TB300-21 Double Row Terminal Block

Bussmann TB300-21 21-Pole Double Row Barrier Terminal Block, 600V/30A

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Model: TB300-21
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$111.09
$71.85
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Bussmann TB300-21 21-Pole Double Row Barrier Terminal Block, 600V/30A

The Bussmann TB300-21 is a 21-pole double row barrier terminal block engineered for reliable power distribution and circuit termination in industrial and commercial electrical panels. Rated 600V and 30A, this terminal block features tin-plated brass terminals paired with zinc-plated steel philslot screws, connected via #8-32 TPI screw terminals for secure, long-lasting connections. With a breakdown voltage rating of 7500V and an operating temperature range of -40° to 130°C, the TB300-21 is built to perform reliably in demanding electrical environments.

Key Features

  • Compact Dimensions: Measures 3.25 IN long x 1.33 IN wide x .81 IN high for space-efficient panel mounting.
  • Durable Construction: Tin-plated brass terminals with zinc-plated steel philslot screws resist corrosion and support dependable conductivity.
  • Screw Connection: #8-32 TPI screw terminals with a 16 lb-in torque rating for secure wire termination.
  • Electrical Rating: Rated 600V and 30A for reliable power distribution.
  • 21-Pole Configuration: Double row, barrier-style design providing 21 poles of termination points.
  • High Breakdown Voltage: 7500V breakdown voltage rating adds an extra margin of dielectric safety.
  • Wide Operating Range: Performs reliably across -40° to 130°C.
  • Finish: Black housing color.

Technical Specifications

  • Amperage Rating: 30A
  • Connection: #8-32 TPI Screw
  • Number Of Poles: 21-pole
  • Operating Temperature: -40° to 130°C
  • Special Features: Breakdown voltage 7500V
  • Torque Rating: 16 lb-in
  • Voltage Rating: 600V
  • Product Type: Double row, barrier
  • Product Length: 3.25 IN
  • Product Details: Double row, barrier
  • Product Color: Black
  • Product Height: .81 IN
  • Product Material: Tin-plated brass terminal, Zinc-plated Steel philslot screw
  • Product Weight: .116 LB
  • Product Width: 1.33 IN

Typical Applications

  • Industrial Control Panels
  • Motor Control Centers
  • Power Distribution Panels
  • OEM Equipment Wiring
  • Junction Box Terminations

Why Bussmann?

Bussmann is a trusted name in circuit protection and power distribution components, and the TB300-21 reflects that standard with tin-plated brass terminals, zinc-plated steel hardware, and a 7500V breakdown voltage rating built for demanding electrical environments. For professionals who need dependable terminal blocks for panel and equipment wiring, the TB300-21 delivers consistent, long-term performance.

Manufacturer Resources

Product Specs

Amperage Rating:
30A
Connection:
#8-32 TPI Screw
Number Of Poles:
21-pole
Operating Temperature:
-40° to 130°C
Special Features:
Breakdown voltage 7500V
Torque Rating:
16 lb-in
Voltage Rating:
600V
Product Group:
0
Department:
Electrical
Product Subgroup:
0
Product Type:
Double row, barrier
Product Length:
3.25 IN
Product Details:
Double row, barrier
Product Color:
Black
Product Height:
.81 IN
Product Material:
Tin-plated brass terminal, Zinc-plated Steel philslot screw
Product Weight:
.116 LB
Product Width:
1.33 IN

Bussmann TB300-21 – Frequently Asked Questions

How fast can I get the Bussmann TB300-21 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 TB300-21 come with a warranty?
Absolutely. The Bussmann TB300-21 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 TB300-21?
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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