ABB - Electrification THQB31WY20 - Q line circuit breakers are one-inch wide per pole, compact, thermal-magnetic devices designed for residential and commercial applications. The QB breakers are bolt-on versions of the Q Line used for bolting to the bus connections of load centers and lighting panels. All Q Line circuit breakers feature Quick-make / Quick-break mechanisms, common trip bars, and easy to spot trip indication to ensure safety and reliability. Q Line breakers are available in 1, 2, and 3 pole versions, can be ordered with auxiliary contact and shunt trip accessories, and can be ordered for use in HID applications. WY20 Amps 20 A
ABB - Electrification

THQB31WY20

UPC: 783164000597


Documents & Media
Specification Sheet

Contact for Pricing

Overview

The ABB Electrification THQB31WY20 is a 3-pole, 20 Amp bolt-on Q Line circuit breaker designed for reliable electrical protection in residential and commercial settings. This compact thermal-magnetic device occupies 3 pole spaces (3 inches wide) and operates at 120/240Vac, featuring a 10,000 AIC (Ampere Interrupting Capacity) for enhanced safety. As a bolt-on version of the Q Line, it ensures a secure connection to load center and lighting panel bus connections via bolt-on terminals, providing stable and durable electrical performance. All Q Line breakers, including the THQB31WY20, incorporate Quick-make / Quick-break mechanisms for rapid circuit interruption, common trip bars for simultaneous pole tripping, and easily visible trip indication for safety and diagnostics. The breaker’s design includes a thermal-magnetic trip unit for overload and short-circuit protection, ensuring precise and responsive operation. The THQB31WY20 is part of ABB's versatile Q Line, which offers 1, 2, and 3-pole configurations and can be ordered with auxiliary contact and shunt trip accessories, as well as for HID applications. Key Specifications: - SKU: THQB31WY20 - Manufacturer: ABB - Electrification - Poles: 3 - Amperage Rating: 20 A - Voltage Rating: 120/240 Vac - Interrupting Capacity (AIC): 10,000 - Mounting Type: Bolt-on - Series: Q Line - Trip Type: Thermal-Magnetic - Compliance: UL 489, cUL - Country of Origin: US This breaker is manufactured in the US and built to UL and cUL standards (UL 489), ensuring compliance with stringent safety and performance requirements. The THQB31WY20 is suitable for applications requiring robust protection and secure bus connection in load centers and lighting panels.
  • 3-Pole, 20 Amp, 120/240 Vac
  • Bolt-on connection for load centers and lighting panels
  • 10,000 AIC Interrupting Capacity
  • Quick-make / Quick-break mechanisms for safety
  • Thermal-magnetic trip unit for overload and short-circuit protection

Specifications

Connection Type
Bolt-on
Current Rating
20 A
Mounting Type
Panelboard or switchboard
Mounting Type
Load center/lighting panel bus connections
Poles
3P
Series
Q Line
Size
1-inch wide per pole
Size
3 inches wide
Special Features
Q line circuit breakers are one-inch wide per pole, compact, thermal-magnetic devices designed for residential and commercial applications. The QB breakers are bolt-on versions of the Q Line used for bolting to the bus connections of load centers and lighting panels. All Q Line circuit breakers feature Quick-make / Quick-break mechanisms, common trip bars, and easy to spot trip indication to ensure safety and reliability. Q Line breakers are available in 1, 2, and 3 pole versions, can be ordered with auxiliary contact and shunt trip accessories, and can be ordered for use in HID applications. WY20 Amps 20 A
Voltage Rating
120/240 V
Voltage Rating
120/240 Vac
Package Dimensions (L x W x H)
4.875 IN x 3.375 IN x 3 IN
Package Dimensions (L x W x H)
12.3825 cm x 8.5725 cm x 7.62 cm
Package Weight (Imperial)
2.736 L
Package Weight (Metric)
1.241 kg
One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.

LCMA6-8-C

One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.
JB5-2 2 POLE JUMPER 5.2MM SPACING

1SNK905302R0000

JB5-2 2 POLE JUMPER 5.2MM SPACING
JB5-5 5 POLE JUMPER 5.2MM SPACING

1SNK905305R0000

JB5-5 5 POLE JUMPER 5.2MM SPACING
Ground Lug

DNGL

Ground Lug
ZCT,LZR-030(V),EMPR,EXP

76512124011

ZCT,LZR-030(V),EMPR,EXP
INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M

83411621001

INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M

Frequently Asked Questions

What type of circuit breakers are these?

These are 1-inch wide per pole, compact, thermal magnetic Q Line miniature circuit breakers.

What applications are these circuit breakers designed for?

The Q Line circuit breakers are designed for residential and commercial applications.

What are the key features of Q Line circuit breakers?

They feature Quick Make, Quick Break mechanisms, common trip bars, and easy-to-spot trip indication.

How many poles are available for Q Line circuit breakers?

Q Line circuit breakers are available in 1, 2, and 3 pole versions.

What is the amperage rating for this specific model?

The amperage rating for catalog number THQB31WY20 is 20 A.

What is the system voltage for this circuit breaker?

The system voltage is 120/240 VAC.

What is the interrupting rating at 120 VAC?

The interrupting rating at 120 VAC is 10,000 A.

What is the interrupting rating at 240 VAC?

The interrupting rating at 240 VAC is 10,000 A.

Is this circuit breaker suitable for reverse feed?

Yes, this circuit breaker is suitable for reverse feed.

Does this model have a long time function?

No, this model does not have a long time function.

Frequently Asked Questions about ABB - Electrification

What industries and applications are Jokab Safety products used for?

Jokab Safety products are specifically designed for machine safety applications across multiple critical industrial sectors, including Food and Beverage, Packaging, and Material Handling industries. Their safety solutions cover a wide range of machine safeguarding needs, such as safety light guards, safety controllers, safety relays, safety edges, safety mats, and two-hand control devices that protect personnel and equipment in complex industrial automation environments.

What technical support does Jokab Safety offer?

Jokab Safety offers comprehensive technical support through multiple channels, including a dedicated technical support phone line at (888) 385-1221 (Option 1) and email support at [email protected]. For advanced technical assistance, customers can contact their specialized Jokab Tech Support at (519) 982-0976 or email [email protected]. Additionally, they provide product specialist support through Jeff Leslie, who can be reached at (519) 982-0976, offering in-depth application and technical guidance.

What are the main product lines offered by Jokab Safety?

Jokab Safety offers a comprehensive range of machine safety products including safety light guards (Orion), safety controllers (Pluto), safety relays (Sentry), safety edges, safety contact mats, safety locks (Gkey), and safety sensors with OSSD and DYNlink interfaces. Their product lines are specifically designed for industrial applications in food and beverage, packaging, and material handling industries, providing robust safety solutions for machine guarding and personnel protection.

What are the key features of Jokab Safety products?

Jokab Safety products offer comprehensive industrial safety solutions with key features including: highest safety certification levels (up to PL e/Cat 4), extensive fault detection, multiple safety device types (optical safety devices, pressure sensitive devices, sensors, switches, locks, emergency stops), and innovative DYNlink technology that reduces cable requirements and simplifies installation. Their products are certified, verified, and compatible with major industrial automation systems like B&R, featuring easy M12 connector connections and a wide range of adapters to streamline safety implementation.

What certifications and standards do ABB - Electrification products comply with?

ABB - Electrification products comply with a comprehensive range of international certifications and standards, including UL (United States), CSA (Canada), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia & New Zealand). Our products meet critical international standards such as IEC 60947 series for low-voltage switchgear, functional safety standards EN 61800-5-2 and ISO 13849-1, and marine classification standards from Bureau Veritas, DNV, and Lloyd's Register of Shipping.

What industries and applications are ABB - Electrification products used for?

ABB - Electrification products are engineered for critical applications across multiple industries, including Energy, Oil & Gas, Manufacturing, Power Generation, HVAC, Marine, Food & Beverage, Mining, Pulp & Paper, Water Treatment, and Automotive. Their solutions cover essential electrical infrastructure needs such as switchgear, power distribution systems, circuit protection, digital control technologies, and drive systems designed for high-reliability environments with a strong focus on sustainability, efficiency, and safety.

What technical support does ABB - Electrification offer?

ABB - Electrification offers comprehensive technical support through multiple channels, including a dedicated technical support hotline at 888-385-1221 (Option 1), available 7:00 a.m. - 5:00 p.m. CST, Monday-Friday. Their support services encompass 24/7/365 emergency services, on-site support, remote monitoring and diagnostics, installation and commissioning, equipment assessments, repair coordination, and multi-vendor technical assistance. Customers can also access resources like personnel safety training, disaster recovery support, and service agreements tailored to their specific electrification needs.

What are the main product lines offered by ABB - Electrification?

ABB - Electrification offers a comprehensive range of electrical distribution and protection products, including circuit monitoring systems, panelboards, switchgear, motor control centers, circuit breakers, softstarters, and power distribution solutions. Key product lines span low and medium voltage applications across utilities, commercial, industrial, healthcare, and manufacturing sectors, with specialized offerings like the ReliaGear® panelboards, SMISSLINE TP bus systems, and Ekip UP protection and metering relays.

What are the key features of ABB - Electrification products?

ABB - Electrification products feature advanced integrated design elements that enhance industrial performance and reliability. Key features include harmonics and EMC design, integrated DC choke, removable terminals for fast installation, USB ports for troubleshooting, and integrated Safe Torque Off (STO) functionality. The products deliver superior motor control capabilities, support both induction and permanent magnet motors, and offer robust operational features like side-by-side mounting without derating and operation at temperatures up to 45°C. Additionally, ABB's Electrification solutions emphasize digital innovation, with technologies like Novolink enabling predictive maintenance, enhanced analytics, and seamless system integration.

What communication protocols do ABB - Electrification products support?

ABB - Electrification products support a comprehensive range of industrial communication protocols, including Modbus RTU, PROFIBUS DP, PROFINET, EtherNet/IP, CANopen, DeviceNet, and IEC 61850. These protocols enable flexible connectivity across multiple industrial automation platforms, with support for various network topologies and high-speed data transmission up to 100 Mbps.