Littelfuse 350-200-2-8 - 350 3PH Volt.Mon./190-240V/adj.RD/2x15A. The 350 is a heavy-duty voltage monitor. This product should be used when high current relays or dual contacts are required, or 480V controls are used. Since the 350 uses heavy-duty relays, it comes in fixed voltage range models rather than a dual autoranging version like the Model 250. The 350-200 has a 15A general purpose contact. The 350-400 provides a SPDT (Form C) relay rated to switch up to 600V, allowing the use of 480V controls, eliminating the need for a control power transformer to step the voltage down to 120-240V. Several DPDT (two Form C contacts) relay models are also available. The 350 microcontroller-based family of products are low cost yet highly advanced solutions to heavy-duty problems. The 350 includes advanced single LED diagnostics. Five different light patterns distinguish faults and normal operating conditions. Other options such as high voltage trip and adjustable restart delay are available.
Littelfuse

350-200-2-8

UPC: 079458989939

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Overview

The Littelfuse 350-200-2-8 is a robust, heavy-duty three-phase voltage monitor engineered for critical industrial applications where precise voltage regulation and reliable control are paramount. Designed by Littelfuse, a trusted leader in circuit protection and power control, this unit offers advanced monitoring capabilities for three-phase power systems operating within a 190-240V range. Its primary function is to detect and respond to voltage anomalies, safeguarding sensitive equipment and ensuring continuous operation. This model is specifically recommended for scenarios demanding high-current relay switching or the use of dual contacts, as well as for systems utilizing 480V controls. Unlike the more general-purpose Model 250, the 350 series features fixed voltage range models, allowing for optimized performance and reliability in specific operational environments. The 350-200 variant is equipped with a 15A general-purpose contact, providing ample capacity for a wide array of control circuits. For applications requiring higher voltage switching capabilities, such as those involving 480V controls, the 350-400 model offers a SPDT (Form C) relay rated to switch up to 600V. This eliminates the need for costly and complex control power transformers to step down voltage to 120-240V, simplifying system design and installation. Additionally, several DPDT (two Form C contacts) relay models are available to meet diverse application needs. At the core of the 350 series is a sophisticated microcontroller, delivering advanced functionality at a cost-effective price point. This intelligent design ensures that even demanding industrial challenges are met with reliable performance. A key feature is the advanced single LED diagnostic indicator, which provides clear, intuitive feedback on system status. Five distinct light patterns are utilized to differentiate between various fault conditions and normal operating states, enabling rapid troubleshooting and minimizing downtime. Further enhancing its versatility, the 350 series offers optional features such as high voltage trip settings and an adjustable restart delay, allowing users to fine-tune the monitor's response to specific operational requirements and system dynamics. Key features and benefits of the Littelfuse 350-200-2-8 include: * **Heavy-Duty Construction:** Built to withstand harsh industrial environments. * **Precise Voltage Monitoring:** Ensures optimal performance for 190-240V three-phase systems. * **High Current Relay Options:** Suitable for demanding control applications, including 480V systems. * **Advanced Diagnostics:** Single LED with five patterns for clear fault and status indication. * **Microcontroller-Based Intelligence:** Offers sophisticated features and reliability. * **Optional Features:** High voltage trip and adjustable restart delay for customized operation. Typical applications for the Littelfuse 350 voltage monitor include motor control centers, HVAC systems, industrial machinery, pump controls, and any critical three-phase power distribution system where voltage stability is essential for operational integrity and equipment longevity. By providing reliable voltage monitoring and robust switching capabilities, the 350 series from Littelfuse helps prevent equipment damage, reduce energy waste, and maintain efficient production processes.
  • Heavy-duty three-phase voltage monitor for industrial applications
  • Operates within a 190-240V range with a 15A general-purpose contact
  • Microcontroller-based for advanced functionality and reliability
  • Single LED diagnostics with five distinct patterns for fault indication
  • Suitable for high current relays, dual contacts, and 480V control systems

Specifications

Brand Name
Littelfuse
Connection Type
Screw Terminal
Current Rating
15 A
Operating Temperature
-40 to 158
Operating Temperature, Maximum
158
Operating Temperature, Minimum
-40
Poles
DPDT (2x Form C)
Series
350
Special Features
5YR WARR
Standard
UL/CSA/CE
Sub Brand
Symcom
Voltage Rating
190-240 V
3PH VltMon/190-240V/adj.RD/10A & 15A Rly. The 350 is a heavy-duty voltage monitor. This product should be used when high current relays or dual contacts are required, or 480V controls are used. Since the 350 uses heavy-duty relays, it comes in fixed voltage range models rather than a dual autoranging version like the Model 250. The 350-200 has a 15A general purpose contact. The 350-400 provides a SPDT (Form C) relay rated to switch up to 600V, allowing the use of 480V controls, eliminating the need for a control power transformer to step the voltage down to 120-240V. Several DPDT (two Form C contacts) relay models are also available. The 350 microcontroller-based family of products are low cost yet highly advanced solutions to heavy-duty problems. The 350 includes advanced single LED diagnostics. Five different light patterns distinguish faults and normal operating conditions. Other options such as high voltage trip and adjustable restart delay are available.

350-200-2-6

3PH VltMon/190-240V/adj.RD/10A & 15A Rly. The 350 is a heavy-duty voltage monitor. This product should be used when high current relays or dual contacts are required, or 480V controls are used. Since the 350 uses heavy-duty relays, it comes in fixed voltage range models rather than a dual autoranging version like the Model 250. The 350-200 has a 15A general purpose contact. The 350-400 provides a SPDT (Form C) relay rated to switch up to 600V, allowing the use of 480V controls, eliminating the need for a control power transformer to step the voltage down to 120-240V. Several DPDT (two Form C contacts) relay models are also available. The 350 microcontroller-based family of products are low cost yet highly advanced solutions to heavy-duty problems. The 350 includes advanced single LED diagnostics. Five different light patterns distinguish faults and normal operating conditions. Other options such as high voltage trip and adjustable restart delay are available.
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1SVR550871R9500

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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.