ABB THQD32100WL — Q-Line TQD 3-Pole 100A Thermal Magnetic Molded Case Circuit Breaker with Cu/Al Line and Load Lugs

The ABB THQD32100WL is a three-pole, 100-ampere thermal magnetic molded case circuit breaker from ABB's Q-Line TQD series — a heavy-duty, lug-in/lug-out configuration designed for demanding commercial and industrial power distribution applications.

Part of ABB's Q-Line family (originally developed under the GE Industrial Solutions brand), the TQD series is built around a fixed, non-interchangeable thermal magnetic trip unit that delivers both thermal (overload) and magnetic (short-circuit) protection in a single, compact device. The thermal element responds to sustained overcurrent conditions, while the magnetic element provides near-instantaneous trip response to fault currents — protecting downstream equipment, wiring, and personnel.

The "WL" suffix in the catalog number indicates that both Cu/Al line lugs and load lugs (lug catalog number TCAL25) are factory-installed, making the THQD32100WL a complete, ready-to-wire assembly right out of the box. This eliminates the need to source and install lug hardware separately, reducing panel assembly time and ensuring proper lug-to-breaker compatibility. The copper/aluminum-rated lugs accommodate a wide range of conductor materials and sizes, giving installers flexibility in feeder and branch circuit wiring.

With a 22kA interrupting rating across all rated voltages — 120V, 120/240V, and 240V AC — the THQD32100WL is well-suited for both single-phase 120/240V residential and commercial panel applications and three-phase 240V distribution systems where available fault current must be carefully managed. The breaker is also rated for reverse feed, providing added flexibility for panel designers and systems integrators working with non-standard feed configurations.

The THQD32100WL is UL Listed under File E11592 and carries an HACR (Heating, Air Conditioning, and Refrigeration) rating, making it code-compliant for motor loads common in HVAC equipment and light manufacturing environments. The breaker is rated at standard continuous current (not 100%-rated), which should be accounted for in load calculations per NEC 210.20. Internal common trip across all three poles ensures that a fault on any single phase simultaneously opens all three poles — a critical protection requirement in three-phase systems.

Typical applications include three-phase feeder and branch circuit protection in panelboards, switchboards, and motor control centers; sub-panel feeds in commercial and light industrial facilities; HVAC and refrigeration equipment branch circuits; reverse-feed panel configurations; and power distribution upgrade or retrofit projects where Q-Line compatible breakers are specified.