Siemens QT Q21550CT Triplex Circuit Breaker – 15A/50A – 1P/2P – 120/240V

The Siemens Q21550CT triplex circuit breaker provides space-saving, multi-circuit protection for Siemens Type QP, MP, and EQ loadcenters. This thermal-magnetic breaker combines two 15A single-pole breakers and one 50A double-pole breaker in a single unit, making it ideal for residential and light commercial panel applications. Its plug-on neutral design simplifies installation while maintaining dependable overcurrent protection.

Voltage and Rating:

• Amperage: 15 Amps (two 1-pole) / 50 Amps (one 2-pole)
• Voltage Rating: 120/240 Volts AC
• Interrupt Rating: 10 kAIC
• Frequency: 50/60 Hz

Key Specifications:

• Breaker Type: Thermal Magnetic Triplex
• Poles: Two single poles and one double pole
• Mounting Mode: Plug-in
• Connection Terminals: Plug-on neutral
• Compatible Panels: Type QP, MP, and EQ loadcenters
• Wire Size:
• (1) #14–8 AWG Cu/Al
• (2) #14–10 AWG Cu/Al
• Tightening Torque: 35.4 lb-in
• Certifications: UL Listed

Physical Specifications:

• • Height: 3.13 in
  • Width: 2.0 in
  • Depth: 3.0 in
  • Weight: 0.750 lbs

Product Data

• • Manufacturer: Siemens
  • Brand: Siemens
  • Series: QT
  • Model Number: Q21550CT
  • UPC: 783643194984
  • Product Type: Triplex Thermal-Magnetic Circuit Breaker
  • Special Features: Space-saving triplex design, plug-on neutral

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You may return items within 10 days of delivery for a refund.

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