When you're choosing a breaker for electrical distribution switchgear protection, the decision usually comes down to the same few questions: how many poles does your circuit need, what current does it draw, and how does your panel accept breakers? Square D offers two breakers that answer those questions in very different ways. The BDA36070 is built for heavier duty, while the EHB14020 is aimed at lighter branch circuits. Knowing which one is right means matching the breaker to both the load and the panel design.
Quick Verdict
If you need serious breaking capacity for a high-current circuit, the Square D BDA36070 is the clear pick. It offers heavy-duty interruption suited to demanding environments. If you're protecting a lighter branch circuit, the Square D EHB14020 is the practical choice. At $27.69 versus $269.99, the lower-priced option leaves a lot more money in your pocket while covering the essentials for lower-current applications.
At a Glance
| Feature | Square D BDA36070 | Square D EHB14020 |
|---|---|---|
| Price | $269.99 | $27.69 |
| Price bar | ||
| Poles | 3 | 1 |
| Current rating | 70A | 20A |
| Voltage | 551-600V | 277V |
| Application | Industrial | Industrial, Commercial |
| Condition | New - Open box | New |
| Break time | Instantaneous | Instantaneous |
Both breakers share Square D's instantaneous break time, so the main differences are the ones you see in the table above.
Where Each Product Wins
The BDA36070 wins for high-current installations. It's rated for a higher voltage range and is built for serious power demands, making it a stronger fit for circuits that need more than a light-duty breaker.
The EHB14020 wins for lighter branch circuits. It's a practical pick for everyday branch wiring.
Product Notes
Square D BDA36070
If you're feeding a panel that accepts I-line breakers, the BDA36070 is built to handle the job. Its design makes it a sensible match for circuits that need more than a light-duty breaker. The I-line mounting style is part of its design, which helps you confirm it's meant for the kind of switchgear that uses I-line style.
The limitation is the condition: it's an open box unit. That means you may want to give it a careful once-over before installation to make sure the breaker hasn't been damaged or disturbed. For a protective component in an electrical panel, a little extra inspection is worth the peace of mind.
Square D EHB14020
For a 20A branch circuit on a bolt-on panel, the EHB14020 is the right call. It's a single-pole, 277V breaker designed for commercial and industrial settings, and the bolt-on mounting style makes it straightforward to secure in place. It includes thermal overload protection and a trip indicator, so you can spot an opened breaker quickly and address the issue without guessing.
The limitation here is capacity. With one pole, the EHB14020 isn't going to handle high-current loads. It's best for circuits that fit within its modest rating, where its simple design makes it an easy choice for protecting branch wiring and connected equipment.
Final Choice by Use Case
Pick the Square D BDA36070 if you're protecting a high-current circuit and need the robust option. Pick the Square D EHB14020 if you need a lighter breaker for a branch circuit. For most everyday lighting and equipment branch circuits, the EHB14020 gets the job done without overbuilding the protection; for heavy loads, the BDA36070 is the breaker that can carry the weight.
