Eaton / Cutler-Hammer QB3020GF GFCI Miniature Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer QB3020GF - 20A GFCI Miniature Circuit Breaker
New
Quantity
Description
Eaton QB3020GF is a Quicklag QB series miniature circuit breaker rated 20A, with 3 poles, 208Y/120VAC voltage and a 10kA interrupting rating at 208Y/120VAC. It features Bolt-On mounting, overcurrent and GFCI protection, a single circuit arrangement, 3-phase operation, lug terminals and UL approval. Thermal magnetic trip technology provides fixed thermal and fixed magnetic adjustment with long-time and instantaneous trip functions. The wire range is 14-4 AWG. Width and height are 3 in, and length is 4.25 in.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | QB3020GF |
| Series | QB |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 208Y/120VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 208Y/120VAC |
| Frame Type | BAB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Quicklag Panelboards |
| Wire Gauge | 14-4 AWG |
| 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 |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Standards | UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
8 answersHow should I use the 20A rating when sizing the circuit?
The 20A rating sets the breaker's nominal current rating for overcurrent protection. Select the circuit load and conductor ampacity using that rating and applicable installation requirements, including continuous-load rules where relevant.
How do I check whether its interrupting rating is adequate?
Compare the available fault current at the installation point with the breaker's 10kA interrupting rating at 208Y/120VAC. The available fault current must not exceed that rating.
Does this breaker provide both GFCI and overcurrent protection?
Yes. GFCI protection detects ground-fault leakage, while overcurrent protection addresses overloads and short circuits. Choose this breaker when the circuit requires both protection functions.
Can I adjust the thermal or magnetic trip settings?
No. Both the thermal and magnetic trip settings are fixed. The thermal element provides long-time overload protection, and the magnetic element provides instantaneous short-circuit protection, so select it for applications that do not require adjustable trip settings.
How is the QB3020GF mounted and connected?
It uses bolt-on mounting and lug terminal connections. Installation involves securing the breaker with its bolt-on mounting hardware and terminating the conductors at the lugs.
What conductor sizes can its terminals accept?
The wire range is 14-4 AWG. Choose a conductor within that terminal range, then verify that its ampacity meets the circuit requirements; terminal acceptance alone does not determine conductor suitability.
What dimensions should I account for when planning installation space?
The breaker is 3 in high, 4.25 in long and 3 in wide. Use all three dimensions when planning the space occupied by the breaker and routing conductors to its terminals.
What voltage and phase arrangement is the Eaton QB3020GF rated for?
The Eaton QB3020GF is a three-pole breaker rated for 208Y/120VAC, three-phase service. Select it for a circuit with that voltage and phase arrangement.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- MCMarcos C.Verified BuyerReviewingEaton / Cutler-Hammer QB1030GF - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars11/20/25circuit breakers
good product and showed up on time