Square D FJA140205 Molded Case Circuit Breaker
- 20A
- 1 Pole
- I-Line
Quantity
Square D FJA140205 - 20A 1 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for heavy-duty industrial environments, this 20A molded case circuit breaker provides reliable long-time and instantaneous trip functions. It comes factory-configured for Phase C connections to streamline phase balancing. The device mounts into standard Square D I-Line panelboards. Facility managers should note this legacy model is replaced by the HJA260205, requiring two pole spaces. Boasting a 65kA rating at 277VAC, it ensures superior fault protection and accepts 14-4 AWG wire.Specifications
| Brand | Square D |
|---|---|
| Part Number | FJA140205 |
| Series | FJA |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 277VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 277VAC, 10kA @ 125VDC |
| Frame Type | FJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included, Phase C Connection (Factory Configured) |
| Standards | UL 489, CSA C22.2 No. 5, NEMA AB 1, IEC 60947-2 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
6 answersWhat panelboards are compatible with the Square D FJA140205?
This 1-pole breaker is specifically designed for installation in Square D I-Line panelboards and switchboards. It features a plug-in connection that mounts directly to the I-Line bus.
How does the I-Line mounting style work for the FJA140205?
The I-Line style plug-in connection allows the breaker to snap directly onto the busbar of a compatible Square D switchboard or panelboard. This design eliminates the need for individual bus connections and speeds up the installation process.
What wire sizes are accepted by the terminals on this breaker?
The standard lugs on the FJA140205 accept 14 to 4 AWG copper wire or 12 to 4 AWG aluminum wire. Ensure proper torque specifications are followed during installation.
Are the trip settings on the FJA140205 adjustable?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous (LI) trip functions are factory set and cannot be adjusted in the field.
Can the FJA140205 be used in direct current (DC) applications?
Yes, this molded case circuit breaker is rated for both AC and DC systems. It can be safely applied in DC circuits up to 125VDC, where it delivers a 10kA interrupting rating.
What type of protection does the thermal-magnetic trip unit provide?
The thermal-magnetic mechanism provides two types of protection. The thermal component responds to sustained overloads using a bimetallic strip, while the magnetic component provides instantaneous tripping in the event of a severe short circuit.
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.