Siemens BQD280 - 80 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens BQD280 — a reliable 80 A, 480 V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built for demanding electrical environments, this device combines rugged mounting with precise, predictable protection to keep your systems safe and operating smoothly.

Key advantages that keep circuits protected

• Secure bolt‑on mounting provides a rigid, vibration‑resistant connection to the bus, reducing the risk of loosening and arcing in panels subject to movement or heat cycling.
• Thermal‑magnetic trip unit delivers stable, repeatable protection, combining time‑delay thermal control with instantaneous magnetic response for high‑energy faults.
• OEM‑compatible design is specifically engineered to work with matching Siemens load centers and panelboards, ensuring consistent fit, trip characteristics, and ease of replacement.
• Versatile 2‑pole, 480 V protection is ideal for commercial and light industrial applications, as well as select residential setups where 480 V distribution is used.

What it does for your electrical system

The BQD280 acts as a protective gatekeeper for downstream circuits. When current exceeds the 80 A rating or a short circuit occurs, the magnetic element trips quickly to interrupt power, preventing conductor damage, equipment failure, and unsafe fault conditions. The bolt‑on mounting keeps the breaker securely attached to the bus even in environments with vibration, temperature swings, or heavy demand.

Technical specifications

• Manufacturer: Siemens
• Part number: BQD280
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage rating: 80 A
• Voltage rating: 480 V
• Poles: 2
• Mounting style: Bolt‑on
• Application: Branch circuit overcurrent and short‑circuit protection

Ideal use scenarios

• Retrofits or new installations in panelboards/load centers that require robust 2‑pole protection at 480 V.
• Commercial electrical rooms and light industrial spaces where dependable protection against overcurrent and short circuits is essential.
• Environments where vibration, heat, or periodic maintenance could loosen connections, making a bolt‑on design advantageous.
• Systems that need seamless replacement with Siemens OEM components to preserve panel performance and warranty alignment.

Installation and care tips

• Verify panel compatibility with Siemens OEM load centers before installation to ensure proper fit and trip characteristics.
• Torque and mounting should follow panel manufacturer guidelines; ensure the bolts are securely tightened to maintain a solid bus connection.
• Periodically inspect the breaker‑bus interface and wiring terminations, especially after major electrical work or panel servicing.
• Adhere to all relevant electrical codes and safety practices during installation and maintenance.