Littelfuse K0702 - TRAFO SPÆND. 380-440/21V 6VA. Trafo Spaend. 380-440/21V 6VA .
Littelfuse

K0702

UPC: 079458961706


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Overview

The **Littelfuse K0702** is a precision-engineered **6VA isolation transformer** designed to deliver reliable voltage conversion for industrial and commercial applications requiring galvanic isolation and stable power delivery. With a **primary voltage range of 380-440V** and a **secondary output of 21V**, this compact yet robust transformer is ideal for sensitive electronic equipment, control systems, and instrumentation where voltage regulation and electrical isolation are critical for operational safety and performance. **Key Features and Technical Specifications** The K0702 is built to meet the demanding requirements of modern industrial environments, offering a **6VA power rating** that supports low-power control circuits, sensors, and signal processing devices. Its **380-440V primary input** accommodates common industrial voltage levels across Europe and other regions with similar grid standards, while the **21V secondary output** provides a stable, isolated power source for downstream components. The transformer’s **isolation rating** ensures protection against electrical noise, ground loops, and transient spikes, safeguarding sensitive electronics from damage and ensuring consistent operation in critical applications. **Industry Applications and Use Cases** Isolation transformers like the Littelfuse K0702 are essential in a wide range of industrial and commercial settings, including: - **Industrial Automation & Control Systems**: Used in PLCs, HMIs, and distributed control systems (DCS) to isolate low-voltage control circuits from high-voltage power sources, preventing interference and enhancing system reliability. - **Instrumentation and Measurement**: Provides stable, noise-free power for sensors, transducers, and data acquisition systems, ensuring accurate readings in process control and monitoring applications. - **Building Management Systems (BMS)**: Powers low-voltage devices such as thermostats, actuators, and lighting controls while maintaining electrical isolation from the main power grid. - **Renewable Energy Systems**: Supports isolated power supplies for monitoring and control equipment in solar, wind, and battery storage installations. - **Medical and Laboratory Equipment**: Delivers clean, isolated power to sensitive devices, complying with safety standards for patient and operator protection. **Why Choose Littelfuse for Isolation Transformers?** Littelfuse is a globally recognized leader in circuit protection and power management solutions, with decades of expertise in designing components that meet the rigorous demands of industrial environments. The K0702 isolation transformer reflects the company’s commitment to quality, reliability, and innovation, ensuring long-term performance even in harsh operating conditions. Professionals across industries trust Littelfuse for its: - **Engineering Excellence**: Transformers are designed with precision to meet or exceed industry standards, including IEC, UL, and CE certifications, ensuring compliance with global safety and performance regulations. - **Durability and Longevity**: Constructed with high-quality materials and robust insulation, the K0702 is built to withstand temperature variations, vibration, and electrical stress, reducing maintenance requirements and downtime. - **Global Support and Availability**: Littelfuse’s extensive distribution network ensures quick access to replacement parts, technical support, and expert guidance, making it easier to source and deploy transformers in any region. - **Sustainability Focus**: Designed for energy efficiency, the K0702 minimizes power losses and heat generation, contributing to lower operational costs and a reduced environmental footprint. **Installation and Integration Considerations** Proper installation of the Littelfuse K0702 is critical to maximizing its performance and lifespan. Professionals should follow these best practices: - **Mounting and Ventilation**: Ensure adequate clearance around the transformer to allow for heat dissipation, especially in enclosed cabinets or high-temperature environments. - **Wiring and Connections**: Use appropriately sized conductors and secure terminations to prevent loose connections or overheating. Follow local electrical codes and manufacturer guidelines for wiring configurations. - **Grounding and Isolation**: Properly ground the transformer’s enclosure and secondary circuit to maintain isolation integrity and comply with safety standards. - **Load Matching**: Verify that the connected load does not exceed the transformer’s 6VA rating to prevent overheating or premature failure. **Selecting the Right Isolation Transformer** When choosing an isolation transformer for your application, consider the following factors to ensure optimal performance and compatibility: - **Voltage Requirements**: Match the primary and secondary voltage ratings to your system’s power supply and load specifications. - **Power Rating (VA)**: Select a transformer with sufficient capacity to handle the connected load without overloading. - **Isolation Rating**: Ensure the transformer provides adequate dielectric strength to protect against electrical noise and transients. - **Environmental Conditions**: Consider factors such as operating temperature, humidity, and exposure to contaminants when selecting a transformer. - **Certifications and Compliance**: Verify that the transformer meets relevant industry standards and regulatory requirements for your application. The **Littelfuse K0702** isolation transformer is a trusted solution for engineers and technicians who demand reliability, precision, and safety in their power conversion systems. Whether you’re designing a new control panel, upgrading an existing installation, or specifying components for a critical application, the K0702 delivers the performance and peace of mind you need to keep your operations running smoothly.
  • 6VA power rating for low-power industrial applications
  • 380-440V primary input, 21V secondary output
  • Galvanic isolation for noise-free power delivery
  • Compact design for easy integration into control panels
  • Compliant with IEC, UL, and CE safety standards
  • Ideal for PLCs, instrumentation, and automation systems

Specifications

Application
Industrial
Brand Name
Littelfuse
Material
High-quality insulation materials
Special Features
High Quality
Sub Brand
Relay Series
Type
Protection Relays and Controls
Voltage Rating
380-440/21V
Voltage Rating
380-440V to 21V
Package Dimensions (L x W x H)
2 IN x 1 IN x 3 IN
Package Dimensions (L x W x H)
5.08 cm x 25.4 mm x 7.62 cm
Package Weight (Imperial)
0.250 L
Package Weight (Metric)
0.113 kg

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Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.