Square D FCB34040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Quantity
Square D FCB34040 - 40A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Providing robust overcurrent protection, the Square D FCB34040 is a 40A, 3-pole molded case circuit breaker for commercial facilities. It utilizes a secure bolt-on connection to integrate seamlessly into Square D I-Line panelboards and switchboards. Facilities looking to upgrade can substitute this unit with the HJA36040. Rated for 65 kAIC at 480VAC, it utilizes reliable thermal-magnetic trip technology to safeguard critical electrical distribution networks.Specifications
| Brand | Square D |
|---|---|
| Series | FCB |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhat is the recommended replacement for the Square D FCB34040?
Facilities looking to upgrade or replace this unit can substitute it with the Square D HJA36040 PowerPacT H-Frame circuit breaker.
How does the FCB34040 install into distribution equipment?
It utilizes a bolt-on connection to mount directly into Square D I-Line panelboards and switchboards, providing a reliable and vibration-resistant installation.
What wire sizes and materials are accepted by the FCB34040 terminals?
The included load side lugs accommodate 14 AWG to 1/0 AWG copper (Cu) conductors, or 12 AWG to 1/0 AWG aluminum (Al) conductors, allowing flexibility for various branch circuit wiring requirements.
Is the trip unit on the FCB34040 adjustable?
Yes, it utilizes thermal-magnetic trip technology with a fixed thermal element for long-time overload protection and an adjustable magnetic pickup for instantaneous short-circuit protection. This adjustability helps coordinate with motor inrush currents.
What is the maximum short-circuit interrupting capacity for this breaker?
The FCB34040 provides a maximum interrupting rating of 100kA at 240VAC and 65kA at 480VAC, making it suitable for commercial and industrial facilities with high available fault currents.
Does the FCB34040 provide ground fault or arc fault protection?
No, this is a standard thermal-magnetic circuit breaker providing long-time and instantaneous (LI) overcurrent and short-circuit protection. It does not include integrated equipment ground fault or arc fault capabilities.
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