ABB - Electrification THN3321 - No matter the application, we’ve got you covered with a rugged, reliable and easy-to-install Spec-Setter safety switch. 30A 3P HD N1 240V NONFUSE SWITCH
ABB - Electrification

THN3321

UPC: 783164011289

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Overview

The ABB Spec-Setter THN3321 is a heavy-duty, non-fusible safety switch engineered for reliable performance in industrial and commercial applications. Rated at 30A, 3 poles, and 240V, this NEMA 1 enclosed switch is designed for quick installation and long-term durability. Certified to UL, cUL, Federal Specification WS-865C, and NEMA KS1-2013 standards, it meets stringent safety and performance requirements, including seismic certification. The THN3321 is horsepower-rated for motor loads up to 3 HP at 240V, ensuring compatibility with a wide range of equipment. Its rugged construction features a durable steel enclosure with a corrosion-resistant finish, providing consistent operation in harsh environments. The switch includes a visible blade disconnect mechanism for enhanced safety, allowing operators to verify the open position before servicing. The THN3321 is ideal for service entrance applications, general disconnect use, and branch circuit isolation where upstream overcurrent protection is provided by external devices such as circuit breakers or fuses. Its compact design allows for easy mounting in tight spaces, while the side-mounted operating handle ensures convenient access. The switch’s ordering code (THN3321) breaks down as follows: 'THN' indicates a non-fusible, heavy-duty switch, '3' denotes 3 poles, '3' for 30A rating, '3' for 240V maximum voltage, and 'N1' for a NEMA 1 enclosure. Trust ABB Electrification’s Spec-Setter series for critical power distribution needs, where safety, reliability, and performance are paramount.
  • 30A, 3 poles, 240V non-fusible safety switch
  • NEMA 1 enclosure for indoor protection
  • UL Listed, cUL Listed, Federal WS-865C compliant
  • Seismic certified for earthquake-prone regions
  • Horsepower-rated for motor loads

Specifications

Amperage Rating
30 A
Application
Heavy
Enclosure
NEMA 1 (Indoor)
Number of Poles
3
Size
10.30 in
Special Features
Designed for commercial and industrial applications where safety, high performance and continuity of service are essential. Listed to UL standard 98 enclosed and dead front switches. Suitable for use as service equipment when installed in accordance with the National Electrical Code. Certified to CSA standard 22.2 no. 4-04 enclosed and dead front switches. Meets or exceeds NEMA KS1 standard for enclosed switches, type HD. Fusible and non-fusible switches available (consult BuyLog for interrupt ratings). Quick-make, quick-break mechanism. 60/75 C conductor rating. Full cover interlocks. THN3321
Standard
Yes
Voltage Rating
240 AC
Package Dimensions (L x W x H)
11.375 IN x 7.5 IN x 7 IN
Package Dimensions (L x W x H)
28.8925 cm x 19.05 cm x 17.78 cm
Package Weight (Imperial)
5.923 L
Package Weight (Metric)
2.687 kg
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Frequently Asked Questions about ABB - Electrification

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.

What environmental ratings do ABB - Electrification products have?

ABB - Electrification products feature robust environmental ratings across multiple standards, including IP54 to IP66 protection levels and NEMA Type 1 to Type 4X enclosures. These ratings ensure equipment can withstand challenging industrial environments, providing dust-tight, water-resistant, and corrosion-resistant protection for indoor and outdoor applications.

What accessories are available for ABB - Electrification products?

ABB - Electrification offers a comprehensive range of accessories across multiple product lines, including auxiliary contact blocks, signaling contacts, shunt trips, undervoltage releases, electronic timers, interlocks, interface relays, mounting pieces, terminal blocks, and connection accessories. These accessories are designed to enhance functionality, improve connectivity, and provide additional protection for industrial control systems, with many accessories being compatible with SMISSLINE TP plug-in distribution systems and Unifix AD busbar systems.

How are ABB - Electrification products typically installed?

ABB - Electrification products are installed through a professional, systematic process that includes precise equipment verification, secure electrical connections, and comprehensive testing. Installation typically involves verifying foundation requirements, assembling equipment, connecting busbars and control cables, establishing earthing systems, and conducting thorough pre-commissioning and commissioning tests to ensure optimal performance, reliability, and safety.

What is ABB - Electrification's warranty policy?

ABB - Electrification offers a standard 1-year factory warranty for most electrification products, with options to extend warranty coverage up to 5 years for specific product lines like low voltage circuit breakers. Extended warranty requires online registration through ABB's Extended Warranty Tool, which verifies the product application and provides additional coverage for manufacturing defects and factory-mounted accessories.