US10D1032A IMO 10kA UL1077 MCB 1 pole 32A D Curve

Why Choose the IMO US10D1032A Miniature Circuit Breaker?

The IMO US10D1032A is a compact UL1077 supplementary miniature circuit breaker designed to provide dependable overload and short-circuit protection within industrial control panels, OEM machinery and factory automation systems. Manufactured by IMO Precision Controls, this single-pole breaker combines thermo-magnetic protection with a space-efficient DIN rail mounted construction.

Featuring a 32 A rated current and a D Curve tripping characteristic, the US10D1032A is suitable for correctly specified circuits containing transformers, industrial power supplies, contactors, solenoids and other inductive equipment with substantial start-up currents. Its operating characteristic accommodates brief inrush conditions while maintaining effective protection against sustained overloads and short circuits.

The breaker provides a 10 kA short-circuit breaking capacity and can be installed alongside PLCs, relays, contactors and other automation components. Its compact modular format makes it a practical choice for panel builders, machine manufacturers and control-system engineers requiring reliable supplementary protection without unnecessarily increasing enclosure size.

Key Advantages

• Compact UL1077 supplementary circuit protector.
• 32 A rated current for industrial control applications.
• D Curve characteristic suitable for loads with high inrush currents.
• 10 kA breaking capacity for dependable fault interruption.
• Single-pole construction conserves valuable DIN rail space.
• Thermo-magnetic operation protects against overloads and short circuits.
• Fast installation onto a standard EN 60715 DIN rail.

Key Features

• IMO Precision Controls US10D Series.
• Single-pole configuration.
• 32 A rated operational current.
• D Curve instantaneous tripping characteristic.
• 10 kA short-circuit breaking capacity.
• UL1077 supplementary protection classification.
• Thermal overload and magnetic short-circuit protection.
• Clear contact-position indication.
• Compact modular enclosure.
• DIN rail mounted design.

D Curve Protection for High-Inrush Loads

The D Curve operating characteristic makes the IMO US10D1032A suitable for equipment that draws a high but short-duration current when energised. Its magnetic protection is designed to operate at approximately 10 to 20 times the rated current, helping the breaker tolerate normal start-up surges without unnecessary nuisance tripping.

This characteristic is commonly selected for transformers, inductive power supplies, solenoid valves, contactor coils and selected machine-control circuits. Final breaker selection must account for conductor size, load current, inrush profile, prospective fault current and the requirements of the upstream protective device.

Reliable Supplementary Circuit Protection

During a sustained overload, the thermal mechanism within the US10D1032A disconnects the protected circuit before excessive current can cause damaging conductor or component temperatures. During a short circuit, its magnetic mechanism operates rapidly to interrupt the fault.

As a UL1077 supplementary protector, the US10D1032A is intended for use within electrical equipment or control systems where suitable branch-circuit protection is already provided. It is not a direct substitute for a UL489 branch-circuit breaker where UL489 protection is required.

Typical Applications

• Industrial control panels.
• OEM machinery and production equipment.
• Factory automation systems.
• Transformer protection circuits.
• Contactor and solenoid circuits.
• Industrial power supplies.
• PLC and machine-control cabinets.
• Instrumentation and process-control equipment.
• Material-handling and packaging machinery.
• Inductive auxiliary circuits with high inrush currents.