Free Shipping Over $99
Square D FH16040A Molded Case Circuit Breaker
- 40A
- 1 Pole
- I-Line
Square D
FH16040A
Molded Case Circuit Breaker
Brand
Square D
SKU
FH16040A
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D FH16040A - 40A 1 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
60A 1 Pole Molded Case Circuit Breaker
20A 1 Pole Molded Case Circuit Breaker
Description
Designed for heavy-duty power distribution, this 40A Square D MCCB offers precise long-time and instantaneous trip functions. The 1-pole breaker is configured specifically for Phase A connections in commercial and industrial environments. It installs easily into Square D I-Line panelboards using a secure plug-in mounting style. Delivering a 65kAIC interrupting capacity at 120VAC, this legacy F-Frame unit ensures dependable safety. It can be substituted with the updated BGA140401 breaker.Specifications
| Brand | Square D |
|---|---|
| Part Number | FH16040A |
| Series | FH |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | I-Line |
| Voltage | 120VAC, 240VAC, 277VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 120VAC, 25kA @ 240VAC, 25kA @ 277VAC, 10kA @ 125VDC |
| Frame Type | FH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Phase Connection A |
| 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
6 answersWhat panelboards accept the FH16040A circuit breaker?
This breaker is designed specifically for Square D I-Line panelboards and switchboards. It utilizes a plug-on line connection that mounts directly to the internal bus stack.
What does the "A" suffix in the FH16040A part number mean?
The "A" suffix indicates the breaker's phase configuration. This 1-pole breaker is factory-configured to connect exclusively to the A-phase of the I-Line bus.
What wire sizes are compatible with the load lugs on this breaker?
The mechanical load lug accepts 14 AWG to 1/0 AWG copper or aluminum wire. The line side does not require wiring, as it plugs directly into the I-Line bus.
Is the FH16040A rated for use in DC electrical systems?
Yes, this thermal-magnetic breaker is rated for 125 VDC applications and provides a 10 kA interrupting capacity for DC circuits.
Are the trip settings adjustable on the FH16040A?
No, this breaker features a thermal-magnetic trip unit with fixed long-time and fixed instantaneous trip functions. It does not offer adjustable trip settings.
What is the modern replacement for the legacy FH16040A?
The legacy F-Frame series has been replaced by the Square D PowerPact B-Frame series. The BGA140401 is the direct modern equivalent, offering the same 40A rating, A-phase I-Line connection, and high interrupting capacity.
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.
Search
Rating
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