Eaton RSG-5 IEC269-4

Eaton RSG-5 IEC269-4

Product Overview
The Eaton RSG-5 IEC269-4 is a fast-acting fuse used for semiconductor and power circuit protection. The “RSG-5” designation refers to Eaton Bussmann’s RSG series fuse body size, while “IEC269-4” indicates compliance with the IEC 269-4 standard for semiconductor fuses. These fuses are commonly applied in converter circuits, rectifier circuits, inverter circuits, drive circuits, and industrial power distribution systems where fast current-limiting protection is required.

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Description

Eaton RSG-5 IEC269-4

Technical Specifications

  • Brand: Eaton / Eaton Bussmann
  • Series: RSG
  • Size code: RSG-5
  • Standard reference: IEC 269-4, semiconductor fuse application
  • Product type: Fast-acting / semiconductor protection fuse
  • Rated voltage: Up to 690 V AC in typical RSG-5 configurations
  • Rated current: Available in multiple current ratings, including 800 A, 1000 A, 1250 A, 1500 A and higher variants depending on the exact sub-model
  • Fuse characteristic: Fast-acting, current-limiting
  • Application class: Semiconductor device protection and industrial power circuit protection
  • Mounting: Bolted blade or panel-mounted fuse base, depending on configuration
  • Indication: Some versions include striker or microswitch indication after fuse operation

Functional Features

  • Provides fast short-circuit protection for semiconductor devices.
  • Limits fault current to reduce stress on diodes, thyristors, IGBTs and power modules.
  • Offers high breaking capacity suitable for industrial power systems.
  • Low I²t value helps protect sensitive semiconductor junctions.
  • Low rated power loss supports efficient continuous operation.
  • Compact body size relative to current rating.
  • Reliable post-fault indication when equipped with striker or indicator accessories.
  • Designed for use in rectifiers, inverters, drives and converter equipment.

Application Scenarios

  • Variable frequency drives and inverter systems.
  • Rectifier and thyristor converter protection.
  • Industrial motor drive input or DC link protection.
  • UPS and power conversion equipment.
  • Renewable energy inverters.
  • Industrial furnace and heating power circuits.
  • Semiconductor manufacturing equipment power stages.
  • Process industry electrical cabinets requiring fast fuse protection.

Performance Parameters

  • Fast-acting semiconductor fuse characteristic.
  • High short-circuit breaking capacity.
  • Current-limiting operation during fault conditions.
  • Low overvoltage during interruption.
  • Low I²t let-through energy.
  • Suitable for AC power circuits up to 690 V in common RSG-5 variants.
  • Exact rated voltage, rated current, breaking capacity, I²t, power loss, time-current curve, ambient temperature derating, mechanical dimensions and certification data must be confirmed from the Eaton Bussmann datasheet and nameplate for the specific RSG-5 part number.

Material Composition

  • Ceramic or high-strength fuse body.
  • Silver or copper fuse element.
  • Quartz sand arc-extinguishing filler.
  • Metal end caps and blade terminals.
  • Insulating housing or base materials.
  • Optional striker pin or microswitch indicator.
  • Nameplate and rating markings.

Structural Features

  • Rectangular or block-type fuse body consistent with RSG-5 size code.
  • Blade-type terminals for bolted connection.
  • Sealed fuse body filled with arc-quenching material.
  • Clear voltage and current rating markings.
  • Optional mechanical or electrical fault indication.
  • Designed for secure mounting on fuse bases or busbar assemblies.

Working Principle
When the circuit current exceeds the fuse element rating, the fuse element heats rapidly and melts. The arc formed inside the fuse body is extinguished by the quartz sand filler, which absorbs arc energy and limits fault current. The fast-acting characteristic allows the fuse to interrupt short-circuit currents before semiconductor devices are damaged. If a striker or indicator is fitted, it provides a visible or electrical signal after the fuse has operated.

Installation Requirements

  • Select the correct rated voltage and current for the protected circuit.
  • Install the fuse on a compatible Eaton Bussmann fuse base or busbar assembly.
  • Ensure tight and clean electrical connections to avoid overheating.
  • Maintain adequate clearance and creepage distances.
  • Provide adequate ventilation around the fuse.
  • Do not install damaged or visibly overheated fuses.
  • Verify system de-energization before installation or replacement.
  • Confirm that the replacement fuse matches the original rating and type.

Precautions for Use

  • Do not replace a fast-acting semiconductor fuse with a general-purpose fuse.
  • Do not exceed the rated voltage or current specified on the nameplate.
  • Investigate the cause of fuse operation before replacement.
  • Replace fuses only with identical ratings and approved types.
  • Handle fuses carefully to avoid mechanical damage.
  • Keep the fuse body clean and free from contamination.
  • Follow Eaton Bussmann installation guides and local electrical safety regulations.
  • For exact electrical and mechanical data, refer to the official Eaton Bussmann RSG series documentation.

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