Square D FH36020-1021 Molded Case Circuit Breaker
- 20A
- 3 Pole
- I-Line
Quantity
Square D FH36020-1021 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial applications, the Square D FH36020-1021 is a 3-pole MCCB from the legacy F-Frame family. Designed to mount into Square D I-Line panelboards, this unit supports existing systems. It is replaced by the PowerPact HGA36020, which requires a separate shunt trip. The 1021 suffix indicates a factory-installed 120-240VAC shunt trip for remote operation. It delivers a 65kAIC rating at 240VAC and includes a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | FH36020-1021-R |
| Series | FH |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480Y/277VAC, 25kA @ 480VAC, 18kA @ 600Y/347VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Visual Trip Indicator |
Product FAQs
7 answersWhat does the -1021 suffix mean on the FH36020-1021 breaker?
The -1021 suffix indicates that the breaker is equipped with a factory-installed 120/240V AC shunt trip accessory. This allows the breaker to be tripped remotely using a control voltage signal.
What type of panelboard accepts the FH36020-1021?
This breaker features an I-Line plug-on mounting style and is designed exclusively for use in Square D I-Line panelboards and switchboards. It cannot be used in standard lug-to-lug enclosures.
How much mounting space does this 3-pole F-frame breaker require on an I-Line bus?
The 3-pole FH36020-1021 requires 4.5 inches of mounting space on the I-Line busbar, which equates to 1.5 inches per pole.
Is the Square D FH series still manufactured, or is there a modern replacement?
The legacy F-frame breakers are obsolete. The modern replacement for a 20A, 3-pole I-Line F-frame is the PowerPact H-frame series. When upgrading, verify your panel's bus structure and available mounting space.
Can the FH36020-1021 I-Line breaker be reverse fed?
No. I-Line circuit breakers feature plug-on jaws specifically designed for the line-side busbar connection and cannot be reverse fed.
What lug kit is used on the load side of the FH36020-1021?
This breaker uses the AL50FA mechanical lug kit on the load side, which accommodates 14-4 AWG copper or 12-4 AWG aluminum conductors.
Does the FH36020-1021 have adjustable trip settings?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time and instantaneous trip functions are factory set and cannot be adjusted in the field.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
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.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 10 reviews.
- DMDonald M.Verified BuyerReviewingSquare D FH36030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Excellent Service
The support team with Super Breakers went over and beyond in ensuring the breakers were on site for an emergency repair…
CAVA Construction Manager very pleased!
Donald Mayo
Mayo Electric
- PHpayton h.Verified BuyerReviewingSquare D FH36090 - 90A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26great
great straightforward company has almost everything you could ever need in stock
- SGShawn G.Verified BuyerReviewingSquare D FH36020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/20/26Thanks !
Excellent service & gear per usual !
Thanks !
- EEarnestVerified BuyerReviewingSquare D FH36060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/3/25Fast delivery and quality
The breaker was in great condition.
- JPJason P.Verified BuyerReviewingSquare D FH36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/5/25Breakers
Order was placed and they came in on time in good condition