You may also like
FLEX BRAID TNCU 400A 2H 38.1X457MM
Manufacturer Resources
Product Specs
- Cable Length:
- 457 mm
- Conductor Category:
- Flexible
- Conductor Shape:
- Flat
- Country Of Origin:
- United States (US)
- Material Of Conductor:
- Tin-Plated Copper
- Product Group:
- Wire & Cable Management
- Product Type:
- Standard Flexible Braid Connector - 2-Hole
- Selling Unit Of Measure:
- each
- Standards:
- IEEE/ANSI C37.34
- Type2:
- Flexible braid
- Department:
- Electrical
- Product Subgroup:
- Connectors
Blackburn STB040A1457 – Frequently Asked Questions
1) What is the Blackburn STB040A1457 flexible braid connector rated for and where is it used?
The STB040A1457 is a 400 amp flexible braid shunt connector built to IEEE/ANSI C37.34, the standard for high voltage air switches. Braids like this carry current across a moving or vibrating joint, such as a switch blade, disconnect, bus expansion point, or transformer connection, where a rigid bar would fatigue and crack. The conductor is flat tin-plated copper, so it flexes repeatedly without work-hardening the way a solid bar would.
2) Is the Blackburn STB040A1457 a 2-hole or single-hole braid connector?
Two-hole terminal pads on the STB040A1457, one at each end. A two-hole pad resists rotation under torque and vibration and gives you two points of contact per end, which is why it is the usual choice on switchgear and bus work rather than a single bolt.
3) Can I substitute a rigid bus bar or a cable jumper for this flexible braid?
Not where movement is involved. A braid is specified when the two terminals move relative to each other, from switch operation, thermal expansion, or equipment vibration. A rigid bar transmits that movement into the terminal pads and eventually cracks the bar or loosens the bolts. Stranded cable flexes but not in the flat, low-profile plane a braid does, and cable does not fit the narrow clearances in switch cabinets the way a 38.1 mm flat braid does. If the joint is truly static, a bar is fine; if it moves, use the braid.
4) Is this Blackburn braid connector made in the USA for a government or utility spec job?
Country of origin is the United States, which matters on utility and public agency work carrying domestic content requirements. The braid is also built to IEEE/ANSI C37.34, which is the reference commonly called out in high voltage air switch specifications.
5) Why tin-plated copper instead of bare copper on a shunt braid?
Tin plating on the copper braid slows oxidation at the contact surface, which keeps joint resistance from climbing over time and helps when the braid lands on aluminum or plated hardware. Bare copper in outdoor or humid switchgear develops oxide that raises resistance and runs the joint hotter. The STB040A1457 is tin-plated throughout.
6) Does the STB040A1457 ship as one piece or in a multi-pack, and what is the part number to order?
Sold each, one braid per unit, under Blackburn manufacturer part number STB040A1457. If you are shunting both sides of a switch or multiple phases, order one per connection point.
How fast can I get the Blackburn STB040A1457 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 Blackburn STB040A1457 come with a warranty?
Absolutely. The Blackburn STB040A1457 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 Blackburn STB040A1457?
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
Why buy the Blackburn STB040A1457 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.