Square D FAB34020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Square D
FAB34020
Molded Case Circuit Breaker
Brand
Square D
SKU
FAB34020
Quantity
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Square D FAB34020 - 20A 3 Pole Molded Case Circuit Breaker
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Description
Part of the legacy F-frame series, this 20A molded case breaker provides essential protection for commercial systems. It handles demanding environments with consistent performance. This unit installs into Square D I-Line panelboards using a secure bolt-on connection. It can also be replaced by the newer BDA34020 model when upgrading facilities. Featuring an 18kAIC rating at 480VAC, it includes the signature Visi-Trip indicator for quick fault identification and is fully HACR rated.Specifications
| Brand | Square D |
|---|---|
| Series | FAB |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489, W-C-375B/GEN |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
7 answersWhat type of panelboard accepts the FAB34020 breaker?
This breaker is designed specifically for Square D I-Line panelboards and switchboards. It uses an I-Line style bolt-on connection that mounts directly to the internal busbar stack.
What wire sizes are compatible with the terminal lugs on the FAB34020?
The included lugs accept 14 to 4 AWG copper (Cu) conductors or 12 to 4 AWG aluminum (Al) conductors. Ensure proper torque specifications are applied during installation.
Can the FAB34020 be used in DC electrical systems?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for use in direct current applications up to 250VDC, providing a 10kA interrupting capacity.
Do I need a separate mounting kit to install this F-frame breaker?
No. As an I-Line style bolt-on breaker, the FAB34020 mounts directly to the busbar system in Square D I-Line panelboards without requiring separate mounting hardware kits.
Are the thermal and magnetic trip settings adjustable on this model?
No, the FAB34020 features fixed thermal (long-time) and fixed magnetic (instantaneous) trip elements.
What does the LI trip function code mean on this breaker?
The LI code indicates that this thermal-magnetic breaker includes Long-Time (L) and Instantaneous (I) trip functions, providing standard protection against overloads and short circuits.
What safety precautions should be taken before installing the FAB34020?
Always de-energize the I-Line panelboard before installation or maintenance. Verify that the power is off using a properly rated voltage sensing device and follow standard lockout/tagout procedures.
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