Square D EH and EHB Obsolete Circuit Breakers

Square D makes a popular line of circuit breakers called the EH and EHB. They are categorized as miniature circuit breakers, because they are used in low-voltage electrical networks and have relatively small amperage ratings.

About Square D

Square D is a brand under the multinational conglomerate, specializing in energy management, called Schneider Electric. It originated back in 1902 as the Detroit Fuse and Manufacturing company. The company made a name for itself building enclosed fuses, which played a part in increasing the safety of Detroit auto factories and making them safer places to work. The company launched its own line of circuit breakers in 1935.

Today, the Schneider Electric company designs and manufactures everything from little switches to automatic operational systems. They have a workforce of 170,000 employees, serving customers in over 100 countries across the globe. The Square D branded products can be recognized by their well-known trademark logo, a capital letter D inside a square that can be found on all their switches.

EH and EHB Obsolete - industrial electrical control panel

What are Obsolete Circuit Breakers?

In the business world, obsolete products refer to anything in the inventory at the end of its product lifecycle. This means these products have not been used or sold for some period of time.

Obsolete products are usually discounted steeply to help clear out inventory space, as keeping them can take up extra resources and decrease the company’s year-end profit.

Why Buy Obsolete Circuit Breakers?

Obsolete circuit breakers are an attractive option because of their availability and pricing. When you buy obsolete, you are not only getting the quality circuit breakers that come with a brand name, you are also paying a fraction of the product’s original cost. This means more savings for you, so you can stick to your budget.

Also, older electrical panels may have circuit breakers that were manufactured decades ago. These breakers may have become obsolete without a compatible replacement. This is where buying an obsolete replacement circuit breaker is the best option, as replacing a defective breaker is a lot less expensive than replacing the whole electrical panel.

commercial facility circuit breaker panel board

EHB34030

The EHB34030 by Square D is a miniature circuit breaker. Its voltage rating is 480V, and its amperage rating is 30A. It also has three poles, meaning it can be connected to three independent circuits.

EHB34100

The EHB34100 by Square D is a molded case circuit breaker, which means it is made with multiple trip mechanisms to protect the circuit. Unlike the EHB34030, it is not a miniature circuit breaker, as it has a higher amperage rating at 100A. It also has three poles and is rated for 480V.

EHB34020

The EHB34020 by Square D is another miniature circuit breaker with a low amperage rating of 20A. Similar to both the EHB34030 and EHB34100, it has three poles to protect three independent circuits and a voltage rating of 480V.

EHB34060

The EHB34060 is another molded case circuit breaker by Square D. At 60A, it has slightly higher amperage ratings. However, at 480V with three poles to protect three circuits, its voltage rating and the number of poles are also the same as all the other EHB circuit breakers.

EHB34050

The EHB34050 by Square D is a molded case circuit breaker with several trip mechanisms to protect the circuit from surges in currents. It also has three poles to protect three independent circuits, as well as a voltage rating of 480V. At 50A, its amperage rating falls in between its EHB counterparts.

commercial facility circuit breaker

EHB14030

The EHB14030 by Square D is another molded case circuit breaker, similar to the EHB34050. The EHB14030 only has one pole, so it can only protect a single circuit at a time from excess currents. It also has a low amperage rating of 30A and a voltage rating of 277V.

EHB34040

The EHB34040 by Square D is another molded case circuit breaker that is similar to its EHB counterparts, with three poles and a voltage rating of 480V. At a low amperage of 40A, its amperage rating is similar to other miniature circuit breakers.

Final Thoughts

Obsolete circuit breakers are an attractive option due to their low cost and availability. They can be used to replace broken, older circuit breakers, as it is cheaper than replacing the entire electrical panel. Square D is a popular brand of circuit breakers that can be recognized by their logo, a D within a square. Their EH and EHB line of miniature circuit breakers are all rated for lower amperages.

Leave a Reply