Circuit Breaker · 70A 2-Pole 120/240V AC · Bolt-On Q-Line Thermal-Magnetic · ABB THQB2170
What this product is for
The ABB THQB2170 is a 2-pole, 70A bolt-on circuit breaker from the Q-Line family for 120/240V AC distribution equipment. It is used for overcurrent protection in compatible Q-Line loadcentres, lighting panels and panelboards where a bolt-on breaker is specified.
Use for
Use for protecting 120/240V AC feeder and branch circuits in commercial, institutional and residential applications where the equipment is listed for THQB series breakers. Typical uses include subfeed circuits, larger HVAC loads, electric heat circuits and other 2-pole loads requiring a 70A breaker.
Rule of thumb: a 70A breaker is commonly selected for loads that require substantial branch or feeder capacity, but conductor sizing, termination ratings, ambient conditions and equipment nameplate requirements must all be verified. Actual performance depends on installation conditions, layout and local electrical code.
Avoid for
Do not use where a plug-in breaker is required instead of bolt-on mounting, where interrupting capacity above 10 kA is needed, or where the panelboard label does not list THQB breakers as approved. Do not substitute for THHQB or other higher-interrupting models unless the equipment documentation permits it.
Best for
Best for electricians replacing or specifying a standard-interrupting Q-Line bolt-on breaker in existing ABB or legacy GE distribution equipment. It suits service work, tenant improvements and maintenance stock where panel compatibility is already known.
Installed in
Installed in compatible Q-Line bolt-on panelboards and loadcentres in commercial buildings, light industrial spaces, multi-residential projects and retrofit applications. The breaker body is compact for panel installation, with lug terminals typically accepting copper or aluminium conductors within the listed wire range.
Why this product exists
This breaker provides standard thermal-magnetic protection in applications where a secure bolt-on connection to the bus is preferred or required by the panel design. The Q-Line platform is widely used in North American distribution equipment, including many legacy GE installations now supported under ABB branding.
Compared with similar products
Compared with plug-in Q-Line breakers such as THQL types, the THQB version uses bolt-on mounting for panelboards and other equipment designed for that connection method. Compared with THHQB versions, this THQB2170 is the standard 10 kA interrupting model rather than the higher interrupting variant often used where available fault current is greater.
Specifications
- Manufacturer part number: THQB2170
- Brand: ABB
- Series: Q-Line / THQB
- Product type: Miniature moulded case circuit breaker
- Pole configuration: 2-pole
- Ampere rating: 70A
- System voltage: 120/240V AC
- Mounting: Bolt-on
- Trip type: Thermal-magnetic, common trip
- Interrupting rating: 10 kAIC at 120/240V AC
- Wire range: 6 AWG to 1/0 AWG copper; 4 AWG to 1/0 AWG aluminium
- Suitable for reverse feed: Yes
- Marking: HACR
- Standards: UL listed; CSA approved/listed where specified by distributor/manufacturer documentation
- Application note: Always confirm breaker type against the panelboard or loadcentre wiring diagram and approved breaker schedule before ordering.
- BrandABB Electrical Distribution
- Warranty5 year
- Electrical
- Poles2 Pole
- Amps70A
- Voltage120/240
- Interrupt Rating (AIC)10
- Physical
- MountingBolt On
- Width2"
- Breaker TypeStandard
Minimum Order $20
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Standard Shipping-Free on orders over $500 in Metropolitan Areas / Subject to $750 in Rural Areas.
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998(Updated August 2026)
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.