Product Description
The Allen-Bradley 100-D420-VTTB is a separately ordered output connection kit designed for use with Allen-Bradley Bulletin 100-D non-reversing MCS D contactors (catalog numbers 100-D210 to 100-D420) with operating currents from 210 to 420 Amps (AC-3). It increases the contactor's enclosure protection to IP20 and accepts conductors up to 120 sq mm. It's compatible with Bulletin 100-DTB terminal lugs (IP2X rated) and supports up to 650 HP at 575V in Wye-Delta starter configurations when combined with other Bulletin 100-D accessories.
Is Your Device Showing These Signs?
The Allen Bradley 100-D420-VTTB commonly experiences issues such as coil burnout due to overvoltage or undervoltage conditions, leading to contactor failure. Terminal block damage from improper torque during wiring is a frequent problem. Overload relay tripping caused by excessive motor current or phase imbalance requires investigation. Contactor buzzing or chattering indicates a worn shading coil or armature. Auxiliary contact malfunction affects signaling and control circuits, demanding inspection and potential replacement.
Technical specifications
The Allen-Bradley 100-D420-VTTB is an output connection kit for Allen-Bradley 100-D non-reversing MCS D contactors (210-420 Amps). It improves enclosure protection to IP20, accommodates conductors up to 120 sq mm, is compatible with 100-DTB terminal lugs (IP2X), and supports up to 650 HP at 575V in Wye-Delta starter setups when used with other 100-D accessories.
Our Repair Process for the
100-D420-VTTB
Our repair process for the Allen Bradley 100-D420-VTTB begins with a thorough inspection to identify coil burnout, terminal block damage, overload relay tripping, contactor buzzing, and auxiliary contact malfunction. Coil integrity is tested, and replacement occurs if burnout is present. Terminal blocks are examined for damage and are replaced or repaired as necessary. Overload relay tripping is investigated to determine the root cause, such as excessive motor current or phase imbalance, and appropriate adjustments or component replacements are performed. Contactor buzzing or chattering prompts inspection and replacement of the shading coil or armature. Auxiliary contacts are tested for proper function, and replacement occurs if malfunction is detected, ensuring reliable signaling and control circuit operation.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY