SKU: US10D1032AMPN: US10D1032A
US10D1032A IMO 10kA UL1077 MCB 1 pole 32A D Curve

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

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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.

Technical Specifications

  • Manufacturer: IMO Precision Controls
  • Series: US10D
  • Model: US10D1032A
  • Product type: Supplementary miniature circuit breaker
  • Rated current: 32 A
  • Number of poles: 1
  • Trip characteristic: D Curve
  • Instantaneous trip range: Approximately 10–20 × rated current
  • Short-circuit breaking capacity: 10 kA
  • Standards: UL1077, IEC 60947-2 and IEC 60898-1
  • UL rated operational voltage: Up to 277 V AC
  • IEC rated operational voltage: Up to 230 V AC
  • DC rated operational voltage: Up to 48 V DC
  • Rated frequency: 50 / 60 Hz
  • Protection rating: IP20 / NEMA 1
  • Pollution degree: 3
  • Mounting method: EN 60715 DIN rail
  • Operating temperature: -25°C to +55°C
  • Calibration temperature: +40°C
  • Mechanical endurance: 20,000 operations
  • Electrical endurance: 6,000 operations
  • Terminal tightening torque: 2.5 Nm
  • Conductor capacity: AWG 18–3 / 0.82–26.7 mm²
  • Approximate weight: 0.125 kg
  • Manufacturer part number: US10D1032A

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.

Technical Specifications

Current 1032 A
Phase Single Phase
HS Code 8536201090
Country of Manufacture India

Frequently Asked Questions

What is the IMO US10D1032A used for?

The US10D1032A provides supplementary overload and short-circuit protection for industrial control circuits, OEM machinery and factory automation equipment.

What is the current rating of the US10D1032A?

The IMO US10D1032A has a rated operational current of 32 A.

What does the D Curve characteristic mean?

A D Curve breaker has an instantaneous magnetic trip range of approximately 10 to 20 times its rated current. This helps it tolerate the brief inrush currents produced by transformers, contactors, solenoids and other inductive loads.

What is the breaking capacity of this breaker?

The IMO US10D1032A provides a 10 kA short-circuit breaking capacity.

Is the US10D1032A a UL489 branch-circuit breaker?

No. The US10D1032A is a UL1077 supplementary protector intended for additional protection within electrical equipment. Suitable upstream branch-circuit protection must be provided where required.

How is the IMO US10D1032A installed?

The breaker clips onto a standard EN 60715 DIN rail inside an industrial control panel, machine cabinet or electrical enclosure.

Which loads are suitable for a 32 A D Curve breaker?

Typical applications include correctly specified transformers, industrial power supplies, contactor coils, solenoid circuits and other inductive loads with high start-up currents.

Compact Protection for Industrial Equipment

The IMO US10D1032A combines a 32 A rating, D Curve operating characteristic and 10 kA breaking capacity in a compact single-pole format for dependable supplementary protection within industrial control systems.
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