Fusible Disconnect Switch · 3-Pole 400A 240V SE Rated · NEMA 1 Heavy Duty 3 Phase · ABB THF4325A1CN
Heavy-duty fusible safety switch rated 400A, 240V AC, 3-pole, 4-wire in a NEMA 1 indoor enclosure for commercial and industrial distribution equipment. CSA service entrance rated for Canada, with Cu/Al wire range up to 600 kcmil and typical use as a local isolation point for large 3-phase equipment.
What this product is for
The ABB THF4325A1CN is a heavy-duty fusible safety switch used to isolate and protect 240V AC power circuits in commercial and industrial installations. It is a 400A, 3-pole, 4-wire switch in a NEMA 1 indoor enclosure and is marked CSA service entrance rated for Canadian applications.
Use for
- Indoor service entrance and distribution disconnecting means where a fusible switch is specified.
- Large 3-phase equipment such as pumps, HVAC equipment, process machinery and motor loads within the switch ratings.
- Electrical rooms, plant maintenance isolation points and commercial service equipment.
Avoid for
- Outdoor or washdown locations that require a NEMA 3R, 4, 4X, 5 or 12 enclosure.
- Applications above the switch voltage, ampere or fuse class suitability.
- Installations where a non-fusible disconnect or different enclosure type is required by design or code.
Best for
Best for electricians and contractors needing a 400A indoor fusible disconnect with Canadian service entrance suitability, copper or aluminium conductor capability, and heavy-duty construction for distribution and motor isolation.
Installed in
Typically installed in electrical rooms, commercial buildings, industrial facilities, service equipment lineups and indoor mechanical spaces. Overall enclosure size is approximately 54.1 in H x 22.9 in W x 8.5 in D (1374 x 582 x 216 mm), so wall space and working clearance should be confirmed before ordering.
Why this product exists
This switch provides a code-aligned means to disconnect power and add branch or feeder overcurrent protection through field-installed fuses. In trade use, a fusible disconnect is commonly selected where available fault current, equipment protection or coordination requirements make a fused solution preferable to a non-fusible switch. Actual suitability depends on fuse selection, available fault current and local electrical code.
Compared with similar products
Compared with general-duty switches, this heavy-duty model is intended for more demanding commercial and industrial service. Compared with non-fusible disconnects, it adds fuse accommodation for circuit protection. Compared with outdoor versions in the same family, this THF4325A1CN is a NEMA 1 indoor unit rather than a weather-resistant enclosure.
Specifications
- Manufacturer part number: THF4325A1CN
- Brand: ABB
- Product family: Heavy Duty Spec-Setter safety switches
- Product type: Fusible safety switch / disconnect
- Amperage: 400A
- Voltage: 240V AC
- Poles: 3
- Wires: 4
- Fusing: Fusible
- Enclosure: NEMA 1 indoor
- Service entrance: CSA service entrance rated
- Wire range: (2) #4 AWG to 600 kcmil copper/aluminium
- Listings: UL Listed, cUL Listed
- Horsepower ratings: 50 hp at 240V AC 1-phase; 125 hp at 240V AC 3-phase; 250 hp at 480V AC 3-phase; 350 hp at 600V AC 3-phase; 50 hp at 250V DC
- Dimensions: 54.1 in x 22.9 in x 8.5 in (1374 x 582 x 216 mm)
- Weight: 107 lb (48.5 kg)
- Wire4 Wire
- Size50.9" High X 23.6" Wide With Handle X 14.4" Deep With Handle
- Service Entrance RatedCSA SE Rated
- PhaseThree Phase
- Poles3 Pole
- Amp400a
- Volt240V
- NemaNema 1
- RatingHeavy Duty
- FusedFusible
- Horse Power RatingStandard Fuse: 50Hp | Time Delay: 125Hp | at 3 Phase 240V
- Fuse Type250V
- Alternate ToSquare D: CH325N | Siemens: HFC325NR | Eaton: CDH325FGK
- BrandABB Electrical Distribution
- Warranty5 year
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.