Siemens B2020 — 20A Tandem Duplex Bolt-On Circuit Breaker (120/240V)

The Siemens B2020 is a 20-amp tandem (duplex) circuit breaker with bolt-on mounting, designed for 120/240VAC single-phase residential and light commercial panelboard applications. This 1-pole-per-circuit tandem design allows two 20A circuits to fit in a single breaker slot, maximizing panel capacity where space is limited.

Key Specifications

• Part Number: B2020
• Brand: Siemens
• Amperage: 20A + 20A (Tandem)
• Poles: 1-Pole per circuit (2 circuits)
• Voltage Rating: 120/240VAC
• Type: Tandem / Duplex Circuit Breaker
• Mounting: Bolt-On
• Trip Type: Thermal Magnetic
• Standards: UL Listed, CSA Certified

Features & Benefits

• Tandem design provides two independent 20A circuits in a single panel slot
• Ideal for panels where additional circuits are needed without upgrading the panel
• Bolt-on mounting for secure installation in Siemens residential panelboards
• Thermal magnetic trip for reliable overload and short-circuit protection on each circuit
• Compatible with Siemens EQ, PL, and ES series load centers

Common Applications

The B2020 is used in residential homes, apartments, and light commercial spaces to add branch circuits for outlets, lighting, appliances, or small equipment in Siemens panelboards where panel space is at a premium.