Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

SQUARE D QOB120GFI Miniature Circuit Breaker - QOB Series, Bolt-On Square D Miniature Circuit Breakers
SQUARE DQOB Series, Bolt-On Square D Miniature Circuit Breakers

SQUARE D QOB120GFI Miniature Circuit Breaker

The SQUARE D QOB Series Miniature Circuit Breaker (MPN QOB120GFI) is a 20 A, single-phase, bolt-on circuit breaker rated for 120V AC with a maximum AIR rating of 10kA at 120V AC. It is designed for use with QO Load…

SKU 3G-OTH-22823

Brand
SQUARE D
Item
QOB120GFI Miniature Circuit Breaker
Part Number
QOB120GFI
Category
QOB Series, Bolt-On Square D Miniature Circuit Breakers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Compliance & shipping

Hazardous material
Not classified as hazardous
California Prop 65 warning
No warning recorded
Licence required
No licence required
Safety Data Sheet
Not available
Special shipping
Ships under standard freight

Technical Specifications

SQUARE D
Manufacturer Part Number
QOB120GFI
Type
Single Phase, 10kA at 120V AC
Length
4.1
AC
120V
Amps
20
Depth
2.9
Poles
1
Width
0.8
SQUARE
D
Standards
UL
Mfr. Model
QOB120GFI
Min. Wire Size
14
Number of Poles
1
AC Voltage Rating
120V
Max. Operating Temp.
104
Min. Operating Temp.
77

Datasheet Content

Instruction Boletín de Directives 48840-088-01 Bulletin instrucciones d'utilisation Rev. 04, 09/2020 Replaces / Reemplaza / Remplace Rev. 03, 48840-088-01, 06/2019 One-Pole QO™/QOB Circuit Breaker and Ground Fault Circuit Interrupter (GFCI) (Class A GFCI, 5 mA Ground Fault Trip Level) Interruptor automático QO™/QOB de un polo con protección de falla a tierra (GFCI) (Interruptor GFCI clase A, nivel de disparo por falla a tierra de 5 mA) Disjoncteur unipolaire QO™/QOB et inerrupteur de circuit sur défaut à la terre ICDT (GFCI) (classe A, niveau de déclenchement sur défauts à la terre de 5 mA) Retain for future use. / Conservar para uso futuro. / À conserver pour usage ultérieur. DANGER / PELIGRO / DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION, PELIGRO DE DESCARGA ELÉCTRICA, EXPLOSIÓN O RISQUE D'ÉLECTROCUTION, D'EXPLOSION OU OR ARC FLASH DESTELLO POR ARQUEO ÉCLAIR D'ARC • Apply appropriate personal protective • Utilice equipo de protección personal (EPP) apropiado y • Portez un équipement de protection personnelle (ÉPP) equipment (PPE) and follow safe electrical siga las prácticas de seguridad eléctrica establecidas por approprié et observez les méthodes de travail électrique work practices. See NFPA 70E, NOM-029- su Compañía, consulte la norma 70E de NFPA, NOM- sécuritaire. Voir NFPA 70E, NOM-029-STPS ou CSA STPS or CSA Z462 or local equivalent. 029-STPS o CSA Z462 la norma local equivalente. Z462 ou aux équivalents applicables dans votre region du • This equipment must only be installed and • Solamente el personal eléctrico especializado deberá monde. serviced by qualified electrical personnel. instalar y prestar servicio de mantenimiento a este • Seul un personnel qualifié doit effectuer l'installation et • Turn off all power supplying this equipment equipo. l'entretien de cet appareil. before working on or inside equipment. • Desenergice el equipo antes de realizar cualquier trabajo • Coupez toute alimentation de cet appareil avant d’y • Always use a properly rated voltage sensing en él. travailler. device to confirm power is off. • Siempre utilice un dispositivo detector de tensión • Utilisez toujours un dispositif de détection de tension à • Circuit breaker must only be supplied by nominal adecuado para confirmar la desenergización del valeur nominale appropriée pour s’assurer que grounded neutral electrical systems. equipo. l’alimentation est coupée. • GFCI must be installed and wired correctly. • El interruptor automático solo debe ser suministrado por • Le disjoncteur ne doit être alimenté que par des GFCI circuit breaker must switch both sistemas eléctricos con neutro conectado a tierra. systèmes électriques neutres mis à la terre. ungrounded (HOT) conductors in order to • Asegúrese de que el GFCI esté correctamente instalado • Assurez-vous que l’ICDT (GFCI) est installé et câblé provide ground-fault protection. Incoming line y alambrado. El interruptor automático con GFCI debe correctement. Le disjoncteur et ICDT doit commuter les must be connected to load center bus. contar con funciones para conmutar ambos conductores deux conducteurs non mis à la terre (SOUS TENSION) • Replace all devices, doors and covers before no conectados a tierra (ENERGIZADO) para de façon à fournir une protection contre les défauts à la turning on power to this equipment. proporcionar protección contra falla a tierra. La línea terre. La ligne d’arrivée doit être raccordée à la barre- • A circuit breaker with ground-fault circuit entrante deberá conectarse a la barra del centro de bus du centre de distribution. interrupter does not protect people who contact carga. • Replacez tous les dispositifs, les portes et les both power wires or either power wire and the • Vuelva a colocar todos los dispositivos, las puertas y las couvercles avant de mettre l’appareil sous tension. neutral. cubiertas antes de energizar el equipo. • Un disjoncteur avec interrupteur de circuit sur défaut à • Un interruptor automático con interruptor con protección la terre ne protège pas les personnes qui mettent en de falla a tierra no protege a las personas que entran en contact les deux fils d’alimentation ou l’un ou l’autre de contacto con los dos conductores de alimentación o ces fils et le neutre. cualquiera de los conductores de alimentación y el neutro. Failure to follow these instructions will result El incumplimiento de estas instrucciones podrá Si ces directives ne sont pas respectées, cela in death or serious injury. causar la muerte o lesiones serias. entraînera la mort ou des blessures graves. NOTE: To minimize nuisance tripping: NOTA: Para evitar el disparo involuntario: REMARQUE : Pour éviter le déclenchement intempestif: • Do not connect circuit breaker to swimming • No conecte el interruptor automático a équipo de • Ne pas raccorder le disjoncteur à des appareils de pool equipment installed before adoption of piscina instalado antes de 1965. piscine installés avant de 1965. the 1965 National Electrical Code. • Do not connect circuit breaker to electric • No conecte el interruptor automático a cocinas • Ne pas raccorder le disjoncteur à des cuisinières ranges or clothes dryers whose frames are eléctricas o secadoras de ropa cuyos marcos estén électriques ou à des séchoirs dont les cadres sont grounded by connection to a neutral conectados a tierra por medio de una conexión a un mis à la terre au moyen d’une connexion à un conductor. conductor neutro. conducteur neutre. • Do not connect circuit breaker to more than • No conecte el interruptor automático a más de 76 m • Ne pas raccorder le disjoncteur à un conducteur de 250 ft. (76 m) of load conductor for the total (250 pies) del conductor de carga en la extensión charge de plus de 76 m (250 pieds) pour la course one-way run. total en una sola dirección. parcourue dans une seule direction. NOTE: When using QO Neutral kit (QONK1, 2, NOTA: Al usar el kit de neutro QO (QONK1, 2, 3 ó 4) en REMARQUE : Lors de l'utilisation d'un kit de neutre 3, or 4) in a QO enclosure, do not install the un gabinete QO, no instale los siguientes interruptores QO (QONK1, 2, 3 ou 4) dans un coffret QO, ne pas following circuit breakers in spaces adjacent to automáticos en los espacios adyacentes en el kit de installer les disjoncteurs suivants dans des espaces the installed neutral kit: AFCI, CAFCI, GFCI, neutro instalado: AFCI, CAFCI, GFCI, EPD/EPE o adjacents au kit de neutre installé : AFCI, CAFCI, EPD/EPE, or QO150-QO200. When installed, QO150-QO200. Cuando están instalados, los kits de GFCI, EPD/EPE ou QO150-QO200. Lorsqu'ils sont the neutral kits may interfere with the proper neutro pueden interferir con la instalación apropiada de installés, les kits de neutre peuvent gêner l'installation installation of these circuit breakers. estos interruptores automáticos. correcte de ces disjoncteurs. Circuit Breaker Installation Instalación del interuptor automático Installation du disjoncteur 1. Turn off all power supplying this equipment 1. Desenergice el équipo antes de realizar cualquier 1. Couper l’alimentation de l’appareil avant d’y before working on or inside equipment. trabajo en él. travailler. ™ One-Pole QO™/QOB Circuit Breaker and Ground Fault Circuit Interrupter (GFCI) Interruptor automático QO™/QOB de un polo con protección de falla a tierra (GFCI) 48840-088-01 Disjoncteur unipolaire QO™/QOB et inerrupteur de circuit sur défaut à la terre ICDT (GFCI) 09/2020 2. Turn Qwik-Gard circuit breaker off. 2. Desconecte el interruptor automático Qwik-Gard. 2. Mettre en arrêt le disjoncteur Qwik-Gard. 3. Install circuit breaker to panel mounting rail 3. Instale el interruptor automático al riel de montaje 3. Installer le disjoncteur sur le rail de montage du and line-side bus connection. See proper del tablero y en la conexión del lado de línea de la panneau et à la connexion du bus de côté ligne. installation code for wire size. See circuit barra. Consulte el código de instalación correcto Se reporter au code d’installation approprié pour breaker for torque value. para obtener el calibre del cable y consulte el obtenir le calibre du fil et au disjoncteur pour interruptor automático para obtener el valor de par obtenir le couple. de apriete. NOTE: The panel neutral wire (A) must be NOTA: El conductor neutro del tablero (A) debe REMARQUE : Le fil du neutre du panneau (A) doit être connected to load center or panelboard neutral conectarse al centro de carga o a la barra del neutro raccordé au centre de distribution ou à la barre du bar for circuit breaker to operate correctly. del tablero para que el interruptor automático funcione neutre du panneau de…

Technical Documents

(1)
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SQUARE D QOB Series Miniature Circuit Breaker (MPN QOB120GFI) is a 20 A, single-phase, bolt-on circuit breaker rated for 120V AC with a maximum AIR rating of 10kA at 120V AC. It is designed for use with QO Load Centers and NQ Panelboards.

Frequently Asked Questions

What is the SQUARE D QOB120GFI miniature circuit breaker used for?

The SQUARE D QOB120GFI is a 20 A, single-phase, bolt-on miniature circuit breaker rated for 120V AC. It provides overcurrent and ground-fault protection in QO Load Centers and NQ Panelboards, commonly used in residential and light commercial electrical distribution systems.

What are the specifications of the SQUARE D QOB120GFI circuit breaker?

The SQUARE D QOB120GFI is a 1-pole, 20 A, 120V AC miniature circuit breaker with a maximum AIR rating of 10kA at 120V AC. It is a bolt-on type designed for use with QO Load Centers and NQ Panelboards, providing ground-fault circuit interruption.

Where to buy the SQUARE D QOB120GFI circuit breaker worldwide?

3G Electric supplies the SQUARE D QOB120GFI miniature circuit breaker to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this genuine SQUARE D part.

How to install the SQUARE D QOB120GFI circuit breaker?

Install the SQUARE D QOB120GFI by first ensuring the panel is de-energized. Bolt the breaker securely into the QO Load Center or NQ Panelboard bus bar. Connect the line and load conductors to the appropriate terminals, torque to manufacturer specifications, and verify ground-fault operation per local codes.

Used in

Common applications for SQUARE D
Commercial building electrical panels — Square D QO series plug-in circuit breakers for branch circuit protection
Industrial motor control centers — Square D QOB series bolt-on breakers in NQOD panelboards
Heating equipment installations — Square D QOU series unit-mount breakers for overcurrent protection
Outdoor electrical distribution — Square D L-Frame enclosures housing LAL/LHL breakers for 400 A service
Indoor facility power distribution — Square D Q-Frame enclosures with QBL/QDL breakers for 225 A circuits
Retrofit and replacement in existing Square D load centers — QO series breakers for 120/240V AC systems
Not sure this is the right part? Photo-identify it

SQUARE D Products

3G Electric supplies SQUARE D qob series, bolt-on square d miniature circuit breakers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Related products

More from SQUARE D

View all SQUARE D parts
Bolt-on miniature circuit breaker rated 50 A at 120/208V AC three-phase. Provides overcurrent protection with a maximum interrupting rating of 10kA at 208/120V AC. Suitable for use in QO Load Centers and NQ Panelboards in commercial and industrial electrical distribution systems
SQUARE D
Bolt-on miniature circuit breaker rated 50 A at 120/208V AC three-phase. Provides overcurrent protection with a maximum interrupting rating of 10kA at 208/120V AC. Suitable for use in QO Load Centers and NQ Panelboards in commercial and industrial electrical distribution systems
Three-pole bolt-on miniature circuit breaker rated 40 A at 120/208V AC, three-phase, with a maximum interrupting rating of 10kA at 208/120V AC. Provides overcurrent and ground-fault protection for use in QO Load Centers and NQ Panelboards in commercial and industrial electrical distribution systems
SQUARE D
Three-pole bolt-on miniature circuit breaker rated 40 A at 120/208V AC, three-phase, with a maximum interrupting rating of 10kA at 208/120V AC. Provides overcurrent and ground-fault protection for use in QO Load Centers and NQ Panelboards in commercial and industrial electrical distribution systems
Three-pole bolt-on miniature circuit breaker rated 30 A at 120/208V AC, three-phase, with a maximum interrupting rating of 10kA at 208/120V AC. Designed for overcurrent protection in QO Load Centers and NQ Panelboards. Suitable for commercial and industrial electrical distribution systems
SQUARE D
Three-pole bolt-on miniature circuit breaker rated 30 A at 120/208V AC, three-phase, with a maximum interrupting rating of 10kA at 208/120V AC. Designed for overcurrent protection in QO Load Centers and NQ Panelboards. Suitable for commercial and industrial electrical distribution systems
Three-pole, three-phase bolt-on miniature circuit breaker rated 20 A at 120/208V AC. Provides overcurrent protection with a maximum interrupting rating of 10kA at 208/120V AC. Designed for use in QO Load Centers and NQ Panelboards in commercial and industrial electrical distribution systems
SQUARE D
Three-pole, three-phase bolt-on miniature circuit breaker rated 20 A at 120/208V AC. Provides overcurrent protection with a maximum interrupting rating of 10kA at 208/120V AC. Designed for use in QO Load Centers and NQ Panelboards in commercial and industrial electrical distribution systems
Three-pole, 15 A miniature circuit breaker for bolt-on mounting in QO Load Centers and NQ Panelboards. Rated 120/208V AC with a maximum interrupting rating of 10kA at 208/120V AC. Provides overcurrent and short-circuit protection in three-phase electrical distribution systems
SQUARE D
Three-pole, 15 A miniature circuit breaker for bolt-on mounting in QO Load Centers and NQ Panelboards. Rated 120/208V AC with a maximum interrupting rating of 10kA at 208/120V AC. Provides overcurrent and short-circuit protection in three-phase electrical distribution systems
Bolt-on miniature circuit breaker from the QOB Series, rated 30 A at 120/240V AC, single phase, with a maximum interrupting rating of 10kA at 120/240V AC. Provides overcurrent and ground-fault protection for QO Load Centers and NQ Panelboards in residential and light commercial electrical distribution systems
SQUARE D
Bolt-on miniature circuit breaker from the QOB Series, rated 30 A at 120/240V AC, single phase, with a maximum interrupting rating of 10kA at 120/240V AC. Provides overcurrent and ground-fault protection for QO Load Centers and NQ Panelboards in residential and light commercial electrical distribution systems
Bolt-on miniature circuit breaker from the QOB Series, rated 25 A, single-phase, 2-pole, 120/240V AC with a maximum interrupting rating of 10kA at 120/240V AC. Designed for use in QO Load Centers and NQ Panelboards to protect branch circuits in electrical distribution systems
SQUARE D
Bolt-on miniature circuit breaker from the QOB Series, rated 25 A, single-phase, 2-pole, 120/240V AC with a maximum interrupting rating of 10kA at 120/240V AC. Designed for use in QO Load Centers and NQ Panelboards to protect branch circuits in electrical distribution systems
Bolt-on miniature circuit breaker from the QOB Series, rated 20 A, 120/240V AC, single phase, with a maximum interrupting rating of 10kA at 120/240V AC. Two-pole construction provides overcurrent protection in electrical distribution systems. For use with QO Load Centers and NQ Panelboards
SQUARE D
Bolt-on miniature circuit breaker from the QOB Series, rated 20 A, 120/240V AC, single phase, with a maximum interrupting rating of 10kA at 120/240V AC. Two-pole construction provides overcurrent protection in electrical distribution systems. For use with QO Load Centers and NQ Panelboards