B2020H

The Siemens B2020H is a 20A tandem (duplex) circuit breaker designed to provide two independent 1-pole overcurrent protection circuits in a single 1-inch breaker slot. As part of Siemens’ B-type breaker family, the B2020H is a space-saving solution that allows panelboard capacity to be increased without expanding the panel itself—ideal for residential and light commercial applications where branch circuits need to be added to a fully loaded panel. Each pole operates independently at 20 amps, 120 VAC, sharing a common molded case but offering separate thermal-magnetic trip mechanisms for each circuit.

Electrically, the B2020H is rated for {aic rating} (Amp Interrupting Capacity) and uses Siemens’ thermal-magnetic trip technology for reliable protection against both overload and short-circuit conditions. Because it is a non-common-trip breaker, each leg of the duplex breaker can trip independently, which is important when protecting two separate circuits from overloads without affecting the other. The B2020H is UL 489 listed and designed to fit Siemens load centers that accept tandem breakers, typically those labeled to accept “CTL” (circuit total limiting) tandem models.

The B2020H is frequently used in residential panel retrofits, service upgrades, or load expansions, especially when the existing panelboard is at or near capacity. Its compact design occupies a single breaker slot while delivering protection for two circuits, making it a practical choice for electricians managing tight panel space. Siemens tandem breakers like the B2020H include rejection features to prevent improper use in non-CTL panels, ensuring safe and code-compliant installations.

Purchase the B2020H at Electrical.com, your reliable partner for industrial and commercial electrical products. Our selection includes breakers, panel boards and accessories from manufacturers like Siemens, backed by a dedicated sales team ready to assist with technical questions, product selection, and support.