Siemens Q23030CT2 Quadplex Miniature Circuit Breaker (Type QT)

Overview

The Q23030CT2 is a space-saving Quadplex breaker designed especially for panels with limited space. It delivers two independent 30 A, 2-pole, 120/240 V circuits, all within a compact housing spanning only 2 panel spaces. This configuration is ideal for adding circuits without expanding the panel.

Key Features & Specifications

• Configuration: Quadplex—two 2-pole, 30 A breakers in a single breaker block, common trip

• Voltage Rating: 120/240 VAC

• Amperage: 30 A (each 2-pole section)

• Interrupting Capacity: 10 kA (10,000 AIC)

• Trip Mechanism: Thermal-magnetic trip (long-time and instantaneous protection)

• Frame Type: QT (1/2-inch frame)

• Mounting Style: Plug-in compatible with Siemens QT-rated load centers

• Wire Range: #14–#6 AWG copper or aluminum conductors

• Temperature Rating: 40 °C

• Dimensions: Approximately 3 in (L) × 3 in (W) × 2 in (H)

• Certifications: UL 489 listed, HACR approved for HVAC use

Benefits

• Maximized Panel Capacity: Enables installation of two 240 V circuits using only two panel spaces.

• Efficient Design: Ideal for tight spaces, as it replaces two standard breakers with one compact unit.

• Robust Protection: Provides reliable overload and short-circuit protection via a standard thermal-magnetic trip.

• Easy Integration: Plug-in installation simplifies retrofits and upgrades in compatible Siemens panels.

Typical Applications

• Adding HVAC, dryer, or water heater circuits when breaker space is limited

• Residential panels needing extra 240 V circuits without panel expansion

• Efficient panel upgrades for increasing circuit capacity in compact panel setups