Q21530CT - Siemens 15/30 Amp 120/240V 4-Pole Quadplex Plug-In Circuit Breaker, QT Series, 10 kAIC, Thermal Magnetic Trip, UL 489

Product Overview

The Q21530CT is a Siemens QT‑series quadplex plug‑in circuit breaker with four poles in a single 2‑inch package. It provides combined 15/30 amp branch protection for 120/240 V systems using thermal‑magnetic trip technology.

Designed for panelboard installation where quadplex breakers are required, the unit is listed to UL 489 and rated for 10 kAIC. Confirm the model number and required quantity before ordering.

Key Features

• Siemens QT series quadplex (4‑pole) plug‑in breaker
• Dual amp rating: 15/30 A (as designated by model)
• Voltage rating: 120/240 V
• Thermal‑magnetic trip mechanism
• Interrupting rating: 10 kAIC
• Listed to UL 489

What this breaker does

The Q21530CT provides branch circuit protection in a quadplex configuration: four poles packaged together for use in panelboards that accept plug‑in QT series breakers. It uses a thermal‑magnetic trip to protect conductors from overloads and short circuits.

• Protects multiple circuits within a single breaker unit.
• Thermal element responds to prolonged overload; magnetic element responds to short circuits.

Electrical ratings and trip type

Key electrical specifications are integral to verifying compatibility with your distribution system.

• Amp rating: 15/30 A (as specified by model name Q21530CT).
• Voltage rating: 120/240 V.
• Interrupting rating: 10 kAIC.
• Trip type: Thermal‑magnetic.

Form factor and mounting

The Q21530CT is a plug‑in quadplex breaker from Siemens’ QT series designed for use in compatible Siemens panelboards that accept plug‑in breakers. Quadplex units occupy a compact multi‑pole position to save space compared with separate single‑pole breakers.

• Configuration: 4‑pole quadplex (four interconnected poles in one unit).
• Mounting style: plug‑in (panelboard dependent).

Certifications and safety listings

This model is listed to UL 489 and has a 10 kAIC interrupting rating as identified by the model naming and product description.

• UL 489 listed.
• 10 kAIC interrupting capacity.

Before you order

Confirm the exact model number, panelboard compatibility, and quantity required before placing an order. The product description and specifications below reflect the Q21530CT SKU only.

• Verify your panel accepts Siemens QT series plug‑in quadplex breakers.
• Confirm that 15/30 A and 120/240 V ratings meet your application requirements.
• Confirm required interrupting rating (10 kAIC) is suitable for your installation.

Before You Order

Confirm the model number and quantity required before ordering. This page documents the single SKU Q21530CT. If you need compatibility confirmation with a specific panelboard, consult the panelboard manufacturer documentation or a qualified electrician.

• Verify panelboard accepts Siemens QT plug‑in quadplex breakers.
• Confirm electrical system requirements: 120/240 V and 15/30 A per model.
• Check that 10 kAIC interrupting rating meets local fault‑current conditions.

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Q21530CT - Siemens 15/30 Amp 120/240V 4-Pole Quadplex Plug-In Circuit Breaker, QT Series, 10 kAIC, Thermal Magnetic Trip, UL 489. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.