The solid state relay portfolio is used in all applications where mechanical relays reach their limits. They switch more frequently, quieter and faster than mechanical relays and are particularly suitable for applications in buses and trucks, in agricultural vehicles and construction machinery, in specialty vehicles and passenger cars.

E-T-A solid state relays are available for DC 12 V and DC 24 V applications and are suitable for standard automotive relay sockets to ISO 7588.

Solid state relays combine high-end power semi-conductors with comprehensive know-how in the areas of heat management, EMC-compliant design and overcurrent protection. The electronic circuitry ensures wear-free, silent and extremely fast switching operations over the entire life span.

The electronic standard relays type ESR10 Micro are solid state relays for DC 12 V and DC 24 V vehicle applications. This space-saving relay is available in three power classes:

• 10 A for max. 85° C / (12 and 24) Vdc
• 17 A for max. 105° C / (12 and 24) Vdc
• 30 A for max. 85° C / 12 Vdc

Their Benefits Include:

• Silent Switching
• Bidirectional Control
• Low Current Consumption
• Long Life Span

The ESR10 Micro relays can easily replace an electro-mechanical relay because polarity of the control input does not matter. The solid state relays are suitable for switching resistive, inductive and capacitive or lamp loads. Unlike electro-mechanical relays they offer frequency control as an option.

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UL 489 and UL 1077 – Designed for AC and DC

MCBs are essential components in electrical systems. They are designed to protect applications and electrical loads against the dangerous consequences of overcurrents.

While MCBs according to UL 1077 provide additional protection for low voltage applications, the MCBs according to UL 489 are designed to provide reliable protection for a wide range of applications and voltage ranges.

Our thermal-magnetic MCB portfolio (4230-T) includes both UL 1077 and UL 489 versions have rated currents from 1 to 63 A with different characteristics and numbers of poles. The 4230-T…U product group (UL 489) is suitable for circuit protection in AC or DC networks, the 4230-T…E product group (UL 1077 / EN 60947-2) is designed for additional protection.

The UL 508A standard specifies the requirements for the construction and installation of control panels to ensure that they comply with electrical safety standards. Among other things, the standard covers the design, wiring and operation of control panels and guarantees that they can control electrical systems safely and reliably.

Our 4230-T MCB is suitable for use in switchgear according to UL 508A. Each load can be individually protected according to the standard.

Typical Applications:

• Automotive manufacturing
• Chemical, oil and gas industry
• Automation and building technology
• Telecommunications and data centres

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Power Entry Modules with Integrated Circuit Breakers

Systematically reducing components is a major success factor for a cost-saving design. And what is more: Fewer components increase the overall reliability and usually lead to space-savings.

E-T-A’s power entry modules combine up to five functions in a single component: a C14/C20 appliance inlet, resettable overcurrent protection, an ON/OFF switch, a line filter and an optional undervoltage release, remote trip or auxiliary switch.

Compared to standard connector modules with fuses the E-T-A power entry modules are equipped with resettable circuit breakers. After an overcurrent trip they can be reset quickly, reliably and easily. Time-consuming fuse replacement is eliminated. Thanks to screw mounting, E-T-A power entry modules have a firm and robust fit in the housing and can thus withstand even high pull-out forces of power cables without any problems.

Benefits:

• Reduced assembly and wiring effort (up to 90 %!)
• Reduced material planning and stock keeping costs
• Increased equipment uptime: Quickly and easily reset circuit breakers
• Time-consuming fuse replacement is omitted
• Low operational costs: No expenses for procurement, inventory management and service for fuses
• High safety: multipole circuit breakers reliably interrupt the current-carrying phase conductor in the event of a fault. This prevents electric shocks.

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E-T-A Electronic Overcurrent Protection Devices are ideally suited to protect equipment components in industrial applications and supply lines which are fed by means of a DC24V switch-mode power supply.

Electronic overcurrent protection prevents dips of the output voltage of switched mode power supplies both in the event of short circuit and overload. At the same time these devices provide selective protection or disconnection. Switching high capacitive loads and indicating a functional error is possible without any problems. Fault indication is by means of LEDs and auxiliary contacts. This helps with trouble-shooting and increases machine run times.

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Reliable. Compact. Cost-Effective.

The 3120 thermal circuit breaker/switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. Type 3120 is ideally suited for overload protection of motors, pumps, transformers and cables. After tripping, it can reliably, easily and quickly be reset. The positively trip-free mechanism ensures reliable disconnection of the circuit even with the actuator blocked.

Benefits:

• Dual Functionality: Combines a circuit breaker and switch in a single compact unit.
• High-Performance Bimetal Technology: Responds to overloads based on current intensity and ambient temperature for precise protection.
• Quick Reset: Eliminates downtime and the hassle of replacing fuses.
• Cost-Effective Design: Streamlines installation, wiring, and logistics—ideal for mass production or modular systems.

Versions Upon Request:

• ON/OFF Switch without overcurrent protection according to the relevant standard for switches for appliances IEC/EN 61058
• Thermal-Magnetic version for an additional short circuit protection

Typical Applications:

• Medical and Laboratory Equipment
• Apparatus and Machine Construction
• Professional Tools
• Household and Garden Appliances
• Offices Machines
• Audio Equipment
• Machine Tools

Key Features:

• Single or double pole thermal circuit breaker/switch combination
• Voltage ratings: AC 240 V, DC 50 V
• Current rating range: 0.1 … 20 A (up to 30 A upon request)
• Optional: push-in terminals for easy and quick wiring with a long-term stability
• Functional extension options with add-on modules for low voltage release, auxiliary contact function or remote trip

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Compact. Reliable. Globally Certified.

The 4230-T is a high-performance thermal-magnetic miniature circuit breaker (MCB) designed for DIN rail mounting, offering dependable protection with a compact footprint. Available in single-pole and multipole configurations, the 4230-T combines advanced safety features with global compliance, making it an ideal solution for a wide range of industrial and commercial applications.

Typical Applications:

• Protection of cables, motors, generators and transformers, thyristors and silicon rectifiers.
• Protection of computers and their peripheral equipment, industrial process control systems, telecommunications equipment, power supplies.

Key Features:

• Standards Compliant: Fully compliant with IEC/EN 60947-2 and UL 489, ensuring suitability for global markets.
• High Breaking Capacity: Rated up to 63 A, making it ideal for use as a Supplementary Protector in demanding environments.
• Snap Action Mechanism: A positively trip-free design ensures reliable disconnection, even under fault conditions.
• Toggle Actuation: With clear visual status indication for quick and easy monitoring.
• DIN 43880 Housing: Standard enclosure design fits seamlessly into existing panel layouts.
• Modular Flexibility: Expandable with auxiliary contacts, working current modules, and other add-ons to adapt to various use cases.
• Custom Trip Characteristics: A variety of trip curves are available to match your specific protection needs.

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SCS200 – Intelligent Power Management

Intelligent and complex systems as well as the electrification of loads currently play a decisive role in the development of on-board electrical systems.

The SCS200 is the right answer to these requirements. It is an intelligent power distribution system, enabling decentralised control and monitoring of loads via CAN bus. The design features a PCB-based power distribution in a compact IP66/67 enclosure.

The SCS200 modules are plug & play solutions which help reduce wiring time and space requirements. Its comprehensive diagnosis capability (integral load protection, load current and voltage measuring, output status) and its integral CAN connection enable predictive maintenance and implemented load management.

Typical Applications:

• Agricultural machinery, construction machinery, special vehicles, trucks and buses
• Decentralised power distribution downstream the ECU
• Vehicle modernisation and easy system extension through standardised CAN components

Benefits

• Predictive maintenance and load management through comprehensive diagnostic functions (current, voltage, status)
• Facilitated wiring through plug & play solution with CAN connection
• Space-saving, flexible installation through compact IP66/67 housing
• Increased safety through integral electronic load protection

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E-T-A High Performance Circuit Breakers

Typical Applications

High performance circuit breakers are ideally suited to protect against overcurrent and short circuit for use in aircraft and vehicles and other specialised equipment where safety is paramount. Battery isolation switches are ideally suited for installation in the main battery systems of heavy duty vehicles including tankers, boats, off-road plant and other battery-powered equipment.

Technology

High performance circuit breakers feature thermal or thermal-magnetic trip and an extremely high rupture capacity. Battery isolation switches are also based on a thermal-magnetic trip mechanism. The thermal part of the circuit breaker provides delayed protection in the event of overload, the magnetic part disconnects the faulty circuit in the event of overload or short circuit within milliseconds.

Customized High Performance Circuit Breakers such as SG, AP or CBM types are available on request. All products of this group provide genuine physical contact isolation.

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E-T-A Hydraulic-Magnetic and Magnetic Overcurrent Circuit Breakers

Typical Applications

Ideally suited to protect against overcurrent and short circuit of printed circuit boards, semi-conductors and telecommunications equipment.

Technology

Circuit breakers with magnetic or hydraulic-magnetic trip mechanism respond extremely fast and provide genuine physical contact isolation. Magnetic trip ensures disconnection of the faulty circuit nearly without delay in the event of short circuit, but also in the event of low overloads. Our models also provide hydraulically delayed switching characteristic required for certain applications.

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E-T-A Thermal-Magnetic Overcurrent Circuit Breakers

Typical Applications

Ideally suited to protect against overcurrent and short circuit of equipment in telecommunications, process control and other industrial applications where sophisticated equipment requires a high precision performance.

Technology

A latching type bimetal is combined with a magnetic coil to ensure protection and genuine physical contact isolation. This provides the joint benefits of delayed operation for low level overcurrent protection and fast magnetic action of higher value short circuits, disconnecting the faulty circuit within milliseconds.

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