SIEMENS
SIEMENS Q230 30 A 2 Pole 120/240V AC Plug In Miniature Circuit Breaker
Two-pole miniature breaker rated 30 A at 120/240 V AC with plug-in mounting for Siemens EQ load centres, 10 kA interrupting capacity and lug terminals for 14–8 AWG wire
- TypeCircuit Breakers
- 30 A two-pole protection for 120/240 V circuits
- 10 kA interrupting rating handles high fault currents
- Plug-in mounting fits Siemens EQ load centres directly
- Toggle actuator gives clear on/off indication
- Lug terminals accept 14 to 8 AWG conductors
SIEMENS Q230 30 A Plug-In Breaker
The SIEMENS Q230 is a 30-amp, two-pole miniature circuit breaker designed for 120/240V AC residential panels. It fits Siemens EQ load centers using a plug-in mounting style and accepts wire sizes from 14 AWG to 8 AWG. This standard toggle-actuator device provides branch-circuit protection for compatible electrical installations.
10 kA Interrupting Rating at 120V AC
The breaker carries a maximum AIR rating of 10 kA at 120V AC, suitable for typical residential fault-current levels. Its plug-in design allows quick installation without bolt-on hardware. The unit operates within a 125A frame size and has no DC voltage rating, limiting use to AC applications only.
Lug Terminals for 14–8 AWG Conductors
Supplied lug terminals accept solid or stranded copper wire ranging from 14 AWG minimum to 8 AWG maximum. No additional accessories or software are included with this standalone protective device. Builders needing DC-rated protection or a different interrupting capacity must select an alternative model.
Highlights
- 30 A two-pole protection for 120/240 V circuits
- 10 kA interrupting rating handles high fault currents
- Plug-in mounting fits Siemens EQ load centres directly
- Toggle actuator gives clear on/off indication
- Lug terminals accept 14 to 8 AWG conductors
Specifications
| Brand | Siemens |
|---|---|
| Type | Circuit Breakers |
Questions about this item
How do I install the Q230 in a Siemens EQ load center, and what is the common mistake?
Align the plug-in base with the panel bus, press firmly until it seats fully, then torque the lug terminals to the panel's specified value; the step often missed is verifying the breaker is completely latched onto the bus before tightening wires.
What maintenance or replacement will the Q230 need over time?
The breaker itself is not serviceable; plan to replace it if it trips repeatedly without overload, shows discoloration at the lugs, or after a fault event that exceeds the 10 kA interrupting rating at 120 V AC.
What limit appears first during sustained operation at full load?
The 30 A thermal trip curve is the first limit; continuous current above 30 A will cause the breaker to open, and the 8 AWG maximum wire size caps the conductor ampacity that can be safely terminated.
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