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DAYTON IEC

DAYTON IEC is a product line of miniature circuit breakers (MCBs) and supplementary protectors designed for industrial and commercial electrical distribution systems. The brand is associated with the DAYTON name, a widely recognized supplier of maintenance, repair, and operations (MRO) equipment, and the IEC designation indicates compliance with International Electrotechnical Commission standards for electrical components. The product family includes DIN rail-mount devices that meet UL489 (miniature circuit breakers) or UL1077 (supplementary protectors) certifications, making them suitable for branch circuit protection or supplemental overcurrent protection in control panels, machinery, and lighting systems. Key specifications across the range include D-curve trip characteristics, which provide high inrush current tolerance for inductive loads such as motors and transformers. Voltage ratings span 96V DC to 125V DC for direct current applications and up to 480V AC for alternating current systems, with interrupting capacities of 10kA at 480V AC for UL489 models and 7.5kA at 480V AC for UL1077 models. Connection options include lug terminals and screw clamp terminals, accommodating various wiring configurations. The devices are available in 2-pole configurations, with current ratings from 2 A to 25 A. 3G Electric stocks a selection of DAYTON IEC circuit breakers and supplementary protectors, including models from the NDB2T-63 and NDB2-63 series, to support plant engineers and maintenance managers requiring reliable overcurrent protection for global installations. The product line is suited for applications in industrial automation, HVAC systems, pump controls, and power distribution panels where space constraints and modular DIN rail mounting are priorities. By offering these components, 3G Electric enables procurement specialists to source standardized protection devices that meet both IEC and UL requirements, facilitating compliance with local electrical codes in multiple regions.

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About DAYTON IEC

DAYTON IEC is a product line of miniature circuit breakers (MCBs) and supplementary protectors designed for industrial and commercial electrical distribution systems. The brand is associated with the DAYTON name, a widely recognized supplier of maintenance, repair, and operations (MRO) equipment, and the IEC designation indicates compliance with International Electrotechnical Commission standards for electrical components. The product family includes DIN rail-mount devices that meet UL489 (miniature circuit breakers) or UL1077 (supplementary protectors) certifications, making them suitable for branch circuit protection or supplemental overcurrent protection in control panels, machinery, and lighting systems. Key specifications across the range include D-curve trip characteristics, which provide high inrush current tolerance for inductive loads such as motors and transformers. Voltage ratings span 96V DC to 125V DC for direct current applications and up to 480V AC for alternating current systems, with interrupting capacities of 10kA at 480V AC for UL489 models and 7.5kA at 480V AC for UL1077 models. Connection options include lug terminals and screw clamp terminals, accommodating various wiring configurations. The devices are available in 2-pole configurations, with current ratings from 2 A to 25 A. 3G Electric stocks a selection of DAYTON IEC circuit breakers and supplementary protectors, including models from the NDB2T-63 and NDB2-63 series, to support plant engineers and maintenance managers requiring reliable overcurrent protection for global installations. The product line is suited for applications in industrial automation, HVAC systems, pump controls, and power distribution panels where space constraints and modular DIN rail mounting are priorities. By offering these components, 3G Electric enables procurement specialists to source standardized protection devices that meet both IEC and UL requirements, facilitating compliance with local electrical codes in multiple regions.

Common Applications

  • Industrial motor control panels — DAYTON IEC D-curve miniature circuit breakers (e.g., NDB2T-63 D16/2 L) protect motor circuits from overloads and short circuits.
  • HVAC equipment — DAYTON IEC supplementary protectors (e.g., NDB2-63 D25/2 L) safeguard compressor and fan motor circuits in commercial HVAC systems.
  • Pump control systems — DAYTON IEC UL489 circuit breakers (e.g., 33V953) provide branch circuit protection for pump motors in water treatment facilities.
  • Lighting distribution panels — DAYTON IEC miniature circuit breakers (e.g., 33V957) protect lighting circuits in industrial and commercial buildings.
  • Automation and PLC cabinets — DAYTON IEC supplementary protectors (e.g., 5ZVE4) protect control transformers and power supplies in programmable logic controller enclosures.
  • Machine tool electrical systems — DAYTON IEC D-curve breakers (e.g., 33V920) handle high inrush currents from solenoid valves and contactors in machining centers.

Frequently asked questions

Common questions about DAYTON IEC from 3G Electric.

What is the difference between UL489 and UL1077 certification for DAYTON IEC circuit breakers?

UL489 certification applies to miniature circuit breakers (MCBs) that are listed for branch circuit protection, meaning they can be used as the primary overcurrent device in a circuit. DAYTON IEC models with UL489, such as the NDB2T-63 series, have a higher interrupting capacity (10kA at 480V AC) and are suitable for protecting wiring and equipment from faults. UL1077 certification applies to supplementary protectors, like the NDB2-63 series, which are intended for use downstream of a branch circuit breaker to protect specific loads. They have a lower interrupting capacity (7.5kA at 480V AC) and are not rated for branch circuit protection. Both types are DIN rail-mount and feature D-curve trip characteristics.

What does D-curve mean on DAYTON IEC miniature circuit breakers?

D-curve refers to the trip characteristic of the circuit breaker, which defines the range of overcurrent that causes the device to trip. For DAYTON IEC D-curve breakers, the magnetic trip threshold is set between 10 and 20 times the rated current (In). This design allows the breaker to tolerate high inrush currents without nuisance tripping, making it suitable for inductive loads such as motors, transformers, and solenoid valves. The thermal trip element handles sustained overloads. The D-curve is specified in the product data for models like the NDB2T-63 D10/2 L and NDB2-63 D25/2 L.

Can DAYTON IEC supplementary protectors be used for DC applications?

The DAYTON IEC supplementary protectors listed in the product range (e.g., SKU 5ZVF0 and 5ZVE4) are rated for AC voltage only, with a maximum of 480V AC. They are not rated for DC voltage, as indicated by the specification 'Not Rated' for DC. For DC applications, the DAYTON IEC miniature circuit breakers with UL489 certification, such as the 33V953 (96V DC) and 33V957 (125V DC), are appropriate. Always verify the voltage rating on the product label before installation in DC circuits.

What is the maximum current rating available for DAYTON IEC 2-pole circuit breakers from 3G Electric?

Based on the current stock, DAYTON IEC 2-pole miniature circuit breakers and supplementary protectors are available with current ratings from 2 A to 25 A. For example, the UL489 miniature circuit breaker 33V953 is rated at 10 A, while 33V957 is rated at 25 A. The UL1077 supplementary protector 5ZVE4 is rated at 2 A, and 5ZVF0 is rated at 25 A. These ratings cover common industrial control and lighting loads. For higher current requirements, consult 3G Electric for additional DAYTON IEC models.

What terminal types are available on DAYTON IEC circuit breakers and supplementary protectors?

DAYTON IEC miniature circuit breakers (UL489) use lug terminals, which accept wire sizes suitable for branch circuit connections. For example, the NDB2T-63 D10/2 L model has lug terminals. The supplementary protectors (UL1077) use screw clamp terminals, which provide a secure connection for smaller gauge wires typical in control panels. Both terminal types are designed for DIN rail mounting and allow for easy installation and maintenance in industrial enclosures.

Does 3G Electric supply DAYTON IEC products?

Yes — 3G Electric (S) Pte. Ltd. supplies DAYTON IEC products. We stock the DAYTON IEC catalog and supply genuine factory-original products with full manufacturer warranty and technical support.