Littelfuse PSR031DL0450 - Littelfuse PSR series high-speed square body fuses are specially designed for protection of power semiconductor devices such as diodes, triacs, IGBTs, SCRs, MOSFETs, and other solid-state devices that are typically designed into power conversion and power conditioning equipment. Variable frequency drives, inverters, UPS, rectifiers, and soft-starters are examples of typical equipment designed with sensitive power semiconductor devices that cannot withstand any line surge or overcurrent conditions and require high-speed protection. Littelfuse POWR-SPEED® PSR series products offer optimized circuit protection at the extremely fast speed required to protect modern day power conversion devices. Available in DIN43653 blade style termination with visual blown fuse indication standard on all fuses and optional micro-switch for external indication.
Littelfuse

PSR031DL0450

Alternate Item Number: PSR031DL0450Z

UPC: 079458250817


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Overview

The Littelfuse PSR031DL0450, a high-speed square body fuse from the esteemed POWR-SPEED® PSR series, is meticulously engineered to provide critical protection for sensitive power semiconductor devices. This fuse is indispensable in modern power conversion and conditioning equipment, safeguarding components such as diodes, triacs, IGBTs, SCRs, and MOSFETs from damaging overcurrents and transient surges. Its rapid response time is paramount for the integrity of these advanced solid-state devices, which are the backbone of numerous industrial applications. Applications for the Littelfuse PSR031DL0450 are widespread across demanding industrial sectors. It is a vital component in Variable Frequency Drives (VFDs), ensuring smooth and reliable operation of motor control systems. Inverters, crucial for converting DC to AC power in renewable energy systems and uninterruptible power supplies (UPS), benefit significantly from this fuse's protective capabilities. Rectifiers, used in battery charging and DC power supplies, and soft-starters, designed to gradually ramp up motor speed and reduce inrush current, also rely on the fast-acting protection offered by the PSR series. The Littelfuse PSR series distinguishes itself with optimized circuit protection specifically tailored for the extremely fast-acting requirements of contemporary power conversion devices. This high-speed performance is not merely a feature but a necessity to prevent catastrophic failure and costly downtime. The PSR031DL0450 is designed with a DIN43653 blade-style termination, facilitating straightforward integration into existing power systems. Furthermore, it comes standard with visual blown fuse indication, allowing for quick and easy identification of a tripped fuse, thereby minimizing diagnostic time. For enhanced operational awareness and integration into supervisory control and data acquisition (SCADA) systems or alarm panels, an optional micro-switch is available to provide external blown fuse indication. Littelfuse, a globally recognized leader in circuit protection, brings its extensive expertise and commitment to quality to the PSR series. When selecting a fuse for critical power semiconductor protection, professionals trust Littelfuse for reliable performance and robust design. The PSR031DL0450 embodies this trust, offering peace of mind and ensuring the longevity and efficiency of high-value power electronic equipment. Its robust construction and precise performance characteristics make it a preferred choice for engineers and maintenance professionals seeking the highest level of protection for their critical infrastructure. The commitment to providing advanced solutions for evolving power electronics challenges is evident in every aspect of the PSR series design and manufacturing.
  • High-speed protection for sensitive power semiconductor devices
  • Optimized for power conversion and conditioning equipment
  • DIN43653 blade-style termination for easy integration
  • Standard visual blown fuse indication
  • Optional micro-switch for external blown fuse indication

Specifications

Amperage Rating
450 Amp
Application
Power conversion devices
Brand Name
Littelfuse
Interrupt Rating
200kA@700VAC
Response Time
Very Fast-Acting (FF)
Special Features
DIN Blade
Sub Brand
POWR-SPEED® PSR Series
Type
Square Body Fuse
Voltage Rating
700/600 VAC/VDC
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

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.