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Square D EHB34020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Square D
EHB34020
Molded Case Circuit Breaker
Brand
Square D
SKU
EHB34020
Quantity
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Square D EHB34020 - 20A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D EHB34020 - 20A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | EHB34020-R |
| Series | EHB |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 14kA @ 480Y/277VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D NEHB Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Quantity
Square D EHB34020 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | EHB34020-R |
| Series | EHB |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 14kA @ 480Y/277VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D NEHB Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
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Description
Designed to support 20A commercial loads, this three-pole thermal-magnetic breaker ensures reliable circuit protection across demanding environments. It fastens securely into legacy Square D NEHB panelboards, providing an essential maintenance component for existing electrical systems. Since the modern EDB34020 substitute requires a completely different NF panelboard, utilizing this specific E-Frame unit saves significant time and labor. Rated for 14kAIC at 480Y/277V with HACR certification.Specifications
| Brand | Square D |
|---|---|
| Part Number | EHB34020-R |
| Series | EHB |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 14kA @ 480Y/277VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D NEHB Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
7 answersCan I install the EHB34020 in a modern Square D NF panelboard?
No, the EHB series is exclusively designed to mount into legacy Square D NEHB panelboards. Modern NF panelboards require EDB, EGB, or EJB series circuit breakers.
Is the Square D EHB34020 still actively manufactured?
No, the EHB breaker line and its compatible NEHB panelboards have been discontinued and are considered obsolete by Schneider Electric. To upgrade to current-production components, a complete panel replacement to an NF series board is required.
Will a newer EDB circuit breaker fit in place of my old EHB34020?
No, EDB circuit breakers cannot be used as direct drop-in replacements for EHB models. They have different physical dimensions and mounting requirements. You must use an EHB series breaker to maintain an existing NEHB panel.
How does this breaker secure to the panelboard busbar?
It utilizes a standard bolt-on mounting configuration. Rather than snapping onto the bus like residential load center breakers, the EHB34020 fastens directly to the NEHB panelboard chassis with screws, providing a highly secure mechanical and electrical connection for commercial and industrial environments.
How do I know if the EHB34020 has tripped during a fault?
The breaker is equipped with a visual trip indicator. When a fault occurs, the operating handle moves to a center position between ON and OFF, and a high-visibility indicator is exposed to help you quickly identify the tripped circuit in a crowded panel.
How does the thermal-magnetic trip mechanism protect the circuit?
The EHB34020 features fixed Long-Time and Instantaneous (LI) trip functions. The thermal element gradually heats up and trips the breaker during sustained overloads, while the magnetic element responds immediately to clear dangerous short circuits.
Can this breaker be used for HVAC equipment?
Yes, EHB series molded case circuit breakers carry a HACR rating. This means they are safety-tested and approved to handle the specific inrush currents and continuous load demands of commercial heating, air conditioning, and refrigeration equipment.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 19 reviews.
Total 5 star reviews: 16 Total 4 star reviews: 3 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
19 reviews
- TSThomas S.Verified BuyerReviewingSquare D EHB24060 - 60A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/28/26President NGE
The quality is excellent, but you need to double check when you order that the corrected one gets delivered
- MDMitchell D.Verified BuyerReviewingSquare D EHB14020HID - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars2/4/26Hard to find
Super breakers has just what I was looking for when no one else did!!
- MSMike S.Verified BuyerReviewingSquare D EHB34060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/21/25Fast reliable service, reasonable prices
I recently ordered the incorrect breakers for a job, but I contacted Drew at SuperBreakers and he got me the correct breakers shipped out that day, which I received the next day. He sent me a label to send the wrong breakers back, and I was quickly refunded a restocking fee that I incurred for my mistake. I was able to get the breakers installed, and the power running to meet the deadline. Not to mention, the price was better than I found elsewhere. Thanks Drew!
I would definitely recommend this company if you need fast, reliable service for your electrical product needs. And I'm sure I will use them again.
Thank you SuperBreakers! Nice job Drew!
- DTDavid T.ReviewingSquare D EHB14020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/12/23Everything worked out perfect thanks
Everything worked out perfect thanks again
- GCGULF C.ReviewingSquare D EHB34020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/5/23Perfect condition
This breaker arrived as advert and timely. Perfect condition. Good working condition