Littelfuse RK-302 - Panel-mounted remote indication and reset for the SE-325. NEMA 4 and NEMA 13 rating. Standard 22-mm mounting.
Littelfuse

RK-302

Alternate Item Number: RK-302

UPC: 079458987805


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Overview

The Littelfuse RK-302 Remote Indication and Reset Kit (SKU: RK-302) is a panel-mounted accessory engineered for the SE-325 series of protection relays. This kit delivers remote monitoring and control capabilities, allowing operators to view relay status and reset trips without direct access to the relay. Designed for industrial environments where accessibility is limited or hazardous, the RK-302 enhances operational efficiency and safety by reducing personnel exposure to high-risk areas. The RK-302 features a standard 22-mm mounting configuration, ensuring compatibility with most control panel cutouts and simplifying installation for both new systems and retrofits. Its rugged construction meets NEMA 4 and NEMA 13 ratings, providing protection against water jets, dust, oil, and coolant—ideal for demanding applications such as manufacturing plants, processing facilities, and washdown environments. The NEMA 4 rating ensures resistance to water ingress, while the NEMA 13 rating protects against oil and coolant exposure, making it suitable for harsh industrial settings. Key functionalities include remote indication, which provides visual status updates of the connected SE-325 relay, and remote reset, allowing operators to quickly restore system functionality after a trip event. This minimizes downtime and improves productivity by enabling rapid response to faults. The RK-302 is particularly valuable in applications where the SE-325 relay is installed in enclosed cabinets, hazardous areas, or locations that are difficult to access. Compatible exclusively with the SE-325 series of protection relays, the RK-302 is a reliable and user-friendly solution for enhancing system responsiveness and maintenance procedures. Its combination of rugged environmental protection, standard mounting, and essential remote functions makes it an indispensable component for maintaining operational efficiency and safety in critical industrial processes. Manufactured in the USA, the RK-302 is backed by Littelfuse’s commitment to quality and innovation in circuit protection technology.
  • Panel-mounted remote indication and reset for SE-325 relays
  • NEMA 4 and NEMA 13 rated for protection against water, dust, oil, and coolant
  • Standard 22-mm mounting for easy installation and compatibility
  • Remote monitoring and reset capabilities reduce downtime and improve safety
  • Manufactured in the USA by Littelfuse for reliable performance

Specifications

Application
NA
Brand Name
Littelfuse
Mounting Type
Panel-mounted
Nema Rating
NEMA 4 / NEMA 13
Size
22 mm
Special Features
NEMA 4 and NEMA 13 rating
Standard
CSA UL
Sub Brand
RK 302 Series
Type
Remote Indication
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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.