Siemens BQD6120 Molded Case Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Quantity
Siemens BQD6120 - 20A 1 Pole Molded Case Circuit Breaker
New
Quantity
Description
Siemens BQD6120 molded case circuit breaker is rated 20A and 347VAC, with 1 pole and a UL 489 interrupting rating of 10kA at 347VAC. It features a thermal magnetic trip, LI trip function, BQD frame, bolt-on mounting and bolt-on terminal connection. The single-phase breaker has standard protection and CSA approval, with a conductor temperature of 60/75 °C and an operating temperature of 40 °C.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQD6120 |
| Series | BQD6 |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 347VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 347VAC |
| Frame Type | BQD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Panelboards |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 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 | Alarm Switch, Auxiliary Switch, Shunt Trip |
|---|---|
| Standards | CSA C22.2 No. 5 |
| Approval | CSA |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
7 answersHow should I use the 20A rating when selecting the Siemens BQD6120?
The Siemens BQD6120 has a rated current of 20A. Check the calculated load and applicable conductor-protection requirements to determine whether a 20A breaker is appropriate for the circuit.
What voltage rating should I check before selecting this breaker?
The BQD6120 is rated 347VAC. Compare the circuit voltage with this AC voltage rating as part of breaker selection.
How do I check whether the interrupting rating is adequate?
The interrupting rating is 10kA at 347VAC under UL 489. The available fault current at the installation point must not exceed that rating at the applicable voltage.
How does the thermal-magnetic LI trip protect the circuit?
The thermal-magnetic LI trip combines long-time overload protection with instantaneous short-circuit protection. The thermal element responds to sustained overloads, while the magnetic element responds rapidly to high fault currents.
What installation method does this breaker use?
The BQD6120 uses bolt-on mounting and a bolt-on terminal connection. Installation involves securing the bolted mounting and electrical connection, rather than using a plug-on connection.
How does the pole count affect circuit selection?
The BQD6120 is a 1-pole breaker with a single-phase rating. Use the pole count to determine whether the circuit requires interruption of one conductor or a multipole breaker.
How does the 60/75 °C conductor temperature rating affect conductor selection?
The conductor temperature rating is 60/75 °C. Use the applicable conductor-temperature basis when checking allowable ampacity, rather than relying only on the conductor insulation temperature rating.
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