Siemens B2020H 20/20A Tandem Miniature Circuit Breaker
- 20/20A
- 1 Pole
- Bolt-On
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Siemens B2020H - 20/20A Tandem Miniature Circuit Breaker
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Description
Rated 22 kAIC at 120/240VAC, this Siemens B2020H tandem circuit breaker offers robust thermal-magnetic protection while maximizing enclosure space. The twin design allows two independent 20-amp circuits to occupy a single-pole footprint, making it ideal for commercial and industrial capacity upgrades. It mounts into Siemens P1, P2, and P3 panelboards, replacing standard 1-pole BL breakers in pairs. Features include SWD and HACR ratings for versatile application support.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B2020H |
| Series | BTH |
| Amperage | 20/20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 14-12 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 12 AWG (Cu), 10 AWG (Al) |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Special Classification | Tandem |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip, Tandem |
Product FAQs
5 answersWhich panelboards accept the Siemens B2020H tandem breaker?
This bolt-on duplex breaker is designed for installation in Siemens P1, P2, and P3 panelboards. It mounts directly to the busbar and fits in the same footprint as standard BL-frame breakers.
How much panel space does the B2020H require?
It requires only a single 1-inch pole space. As a tandem breaker, it provides two independent 20-amp circuits within that single space, making it an effective solution for adding capacity to full panelboards.
Can the B2020H be used for 240V loads requiring a two-pole breaker?
No. Although it has two 20-amp toggles, this is a tandem breaker that provides two independent 120V single-pole circuits. It lacks a common trip mechanism and cannot be used to protect 240V equipment.
What is the difference between the Siemens B2020 and the B2020H?
The standard B2020 has an interrupting rating of 10 kAIC, whereas the B2020H is the high-interrupting version rated at 22 kAIC. The B2020H is required in commercial or industrial systems where the available fault current exceeds 10,000 amps.
Can I use the B2020H to replace a standard single-pole BL breaker?
Yes, it shares the exact same 1-inch bolt-on footprint as a standard 1-pole BL series breaker. Replacing a single-pole breaker with this tandem unit allows you to add an extra circuit without upgrading the panel enclosure.
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