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Solid quality component. Exactly as described on the product page.
Maintenance team · Ontario
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Circuit Breaker
Eaton | HLDB3400 | Circuit Breaker | 400A | 3-Pole
| Part Number | HLDB3400 |
| Amperes | 400 |
| Poles | 3 |
| Product Type | Circuit Breaker |
Regular price
$37,978.00
Sale price
$37,978.00
Regular price
Unit price
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Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
Eaton | HLDB3400 | Circuit Breaker | 400A | 3-Pole
Regular price
$37,978.00
Sale price
$37,978.00
Regular price
Unit price
Product description
Shipping
When protecting a three‑phase electrical setup, the Eaton HLDB3400 circuit breaker delivers trusted reliability with a focus on precise, coordinated protection. Designed for maintenance, retrofit, and replacement needs where exact specifications are essential, this 400A, 3‑pole unit is built to fit Eaton-compatible panels and configurations.
Key specs at a glance
- Amperage: 400A
- Poles: 3‑Pole
What makes the HLDB3400 stand out
- Three‑pole design ensures simultaneous interruption across all three phases, safeguarding three‑phase equipment and reducing the risk of phase imbalances.
- Part of Eaton’s HLDB family, crafted to align with Eaton panel interfaces and mounting standards for dependable, straightforward compatibility.
- Clear compatibility reference: the part number HLDB3400 is the best guidance for matching this breaker to the right panel and system.
Fit & compatibility
Before ordering, confirm fit and ratings. Use the HLDB3400 as the primary reference to ensure the amperage, pole configuration, and Eaton interface match your panel. This 400A, 3‑pole device is intended for panels and distributions systems that specify HLDB‑style breakers and compatible bus configurations.
Ideal use cases
- Maintenance: replace aging or failed breakers in Eaton-compatible panels to restore reliable protection with minimal downtime.
- Retrofit: upgrade existing electrical distribution setups that require a 3‑pole, 400A protective device from the HLDB lineup.
- Replacement: swap in a like‑for‑like unit during panel modernization or repair projects, ensuring continuity of protection.
Practical installation tips
Ensure safe, compliant installation by fully de‑energizing the system and following lockout/tagout procedures. Verify that your panel accepts a 3‑pole HLDB‑series device and that bus connections and mounting align with Eaton standards. When in doubt, consult your panel documentation to avoid compatibility issues.
What you get
The Eaton HLDB3400 is a 400A, 3‑pole circuit breaker designed for maintenance, retrofit, and replacement projects where exact specification matching is essential. Rely on the part number HLDB3400 as the strongest signal of compatibility with your Eaton-based distribution system.
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What Our Customers Say
General feedback we often hear from customers purchasing industrial electrical parts.
Verified
Packaging was secure and the item arrived clean and ready for installation.
Electrical contractor · GTA
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We’ve used this type on multiple jobs and it’s been reliable so far.
Panel shop · Canada/US
