B220GFHH Siemens 20 Amp 2-Pole GFCI Circuit Breaker, 120/240V, 65kA, Bolt-On

B220GFHH Siemens 20 Amp 2-Pole GFCI Circuit Breaker, 120/240V, 65kA, Bolt-On

If someone handed you a part number like B220GFHH and you are trying to work out what it actually is, here is the short version. It is a Siemens circuit breaker that takes up two spaces, carries 20 amps at 120/240 volts, and adds ground fault protection of the same kind you find in a GFCI outlet. Siemens calls the build type HBLFB, which simply means it is the bolt-on version rather than a plug-in one.

The extra letters at the end matter. GF means ground fault, and the two H characters mean the breaker is rated to safely interrupt up to 65,000 amps of fault current. Ground fault protection here is Class A at 5 mA, so the breaker opens the circuit when it senses an imbalance of about 4 mA to 6 mA between the wires. Siemens lists it as UL Listed and cUL Certified under UL 943, with a built-in self-test that trips the breaker on its own if the protection stops working properly.

Common Applications

• Spa and hot tub circuits
• Kitchen receptacle circuits
• Bathroom receptacle circuits
• Construction power
• 120/240 V AC single-phase, three-wire systems
• The 120/240 V AC portion of 240/120 V three-phase, four-wire systems
• 208Y/120 V three-phase, four-wire systems

Key Features

• Class A ground fault protection: Senses a small 4 mA to 6 mA leak of current and shuts the circuit off.
• 65,000 A interrupting rating: Rated to safely clear a fault as large as 65,000 amps.
• UL 943 self-test: Checks its own protection automatically and trips itself if something is wrong.
• RF interference shielding: Helps stop radio signals from tripping the breaker when nothing is actually wrong.
• No load neutral required: Two-pole circuits skip the load neutral, though the white pigtail still connects to the panel neutral.

Specifications

• Manufacturer: Siemens
• Catalog Number: B220GFHH
• Type: HBLFB
• Product Type: Class A ground fault circuit interrupter circuit breaker
• Poles: 2
• Amperage: 20 A
• Voltage: 120/240 V AC
• Interrupting Rating: 65,000 A
• Ground Fault Sensitivity: Class A, 5 mA
• Mounting: Bolt-on
• Standard: UL 943
• Listings: UL Listed, cUL Certified
• Additional Ratings: HACR, SWD
• Lifecycle Status: Active

Product Identification

• Packaging Dimensions: 5.00 in L x 2.00 in W x 3.00 in H
• Net Weight: 0.8 lb

FAQ

What kind of breaker is a B220GFHH? A Siemens two-pole, 20 amp ground fault circuit interrupter breaker for 120/240 volt circuits, built in the bolt-on style.

What do the letters GFHH stand for? GF is ground fault, and HH is the 65,000 amp interrupting rating, the highest of the three levels Siemens offers on this breaker.

Is this the same protection as a GFCI outlet? Yes, it is Class A 5 mA protection, the same category used for personnel protection in GFCI receptacles.

Does a two-pole GFCI breaker need a neutral wire to the load? Not on a two-pole circuit, but the white pigtail coming off the breaker still has to be connected to the panel neutral.