Littelfuse PSX1XLDB0450 - POWR-SPEED SQB SIZE 1XL DIN BL 450A. Littelfuse PSX series 1500 V dc high-speed square bodyfuses are specially designed to protect battery energy storage systems (BESS), photovoltaic inverters, and many of dc applications such as dc common bus systems, larger industrial regenerative drives, rectifiers and, metal processing equipment. The PSX series fuses are extremely fast-acting, offering high-speed performance up to 1500 V dc, ranging from 80 A to 1400 A in the smallest NH XL package sizes. The PSX series is available with multiple mounting terminations including flush-end style, DIN-style and bolted-blade style. Visual blown fuse indication is standard on all fuses and optional micro-switch is available for external indication. PSX series are certified to UL 248-13 and designed to meet EN high-speed semiconductor fuse standard and IEC 60269-7, a new battery protection fuse standard in development.
Littelfuse

PSX1XLDB0450

Alternate Item Number: PSX1XLDB0450X

UPC: 079458263305


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Overview

The **Littelfuse PSX1XLDB0450** is a high-performance, 1500V DC high-speed fuse engineered for mission-critical applications in battery energy storage systems (BESS), photovoltaic (PV) inverters, and industrial DC systems. Designed to deliver ultra-fast fault protection in compact **Size 1XL NH XL package**, this 450A fuse ensures rapid response to overcurrent events, safeguarding sensitive equipment from catastrophic damage. As part of Littelfuse’s **PSX series**, it combines cutting-edge semiconductor fuse technology with robust construction to meet the demands of modern power electronics, renewable energy integration, and heavy industrial machinery. **Key Features & Benefits:** - **Ultra-Fast Response:** The PSX series is engineered for high-speed interruption, critical for protecting semiconductor-based systems where milliseconds matter. Unlike conventional fuses, these high-speed fuses are optimized for DC applications, providing near-instantaneous fault clearance to prevent thermal runaway and equipment failure. - **Wide Voltage & Current Range:** With a **1500V DC rating** and **450A current capacity**, the PSX1XLDB0450 is ideal for high-voltage DC bus systems, including BESS, PV arrays, and industrial drives. Its compact **Size 1XL** design allows for efficient space utilization in control panels and switchgear. - **Versatile Mounting Options:** Available in **DIN-style mounting**, the PSX1XLDB0450 integrates seamlessly into standard industrial enclosures. Optional **flush-end and bolted-blade styles** provide flexibility for retrofits or custom installations, while **visual blown-fuse indication** ensures quick diagnostics without additional tools. - **Advanced Protection Standards:** Certified to **UL 248-13** and compliant with **EN high-speed semiconductor fuse standards** and **IEC 60269-7** (battery protection), this fuse meets the stringent requirements of global industrial and renewable energy markets. Its design aligns with evolving safety regulations, making it a future-proof choice for critical infrastructure. - **Enhanced Safety & Monitoring:** Standard **visual blown-fuse indication** simplifies maintenance, while an optional **micro-switch** enables remote monitoring of fuse status—crucial for unattended systems like solar farms or data centers. This feature reduces downtime and supports predictive maintenance strategies. **Industry Applications:** The PSX1XLDB0450 excels in environments where reliability and speed are non-negotiable. In **battery energy storage systems (BESS)**, it protects inverters and DC busbars from short circuits and overloads, ensuring grid stability and operational safety. For **photovoltaic inverters**, it safeguards power electronics from transient faults caused by solar panel mismatches or grid disturbances. Industrial applications include **regenerative drives, rectifiers, and metal processing equipment**, where high-speed DC interruption prevents costly equipment damage and production halts. **Why Choose Littelfuse?** Littelfuse is a global leader in circuit protection, with over a century of innovation in fuse technology. The **PSX series** reflects the company’s commitment to advancing high-speed fuse solutions for modern power systems, including renewable energy and electrification trends. Engineers and procurement professionals trust Littelfuse for its rigorous testing, global certifications, and responsive technical support. The PSX1XLDB0450 is no exception—it combines performance, compliance, and durability to deliver unmatched protection in high-voltage DC applications. **Installation & Compatibility:** Designed for **DIN-rail mounting**, the PSX1XLDB0450 fits standard industrial enclosures, reducing installation time and complexity. Its **compact Size 1XL** footprint allows for high-density panel layouts, while the **blown-fuse indicator** ensures immediate visual confirmation of fault conditions. For systems requiring remote monitoring, the optional micro-switch integrates with SCADA or PLC systems, enabling real-time status alerts. Always consult the manufacturer’s datasheet for proper sizing, coordination with upstream/downstream protection, and compliance with local electrical codes. For professionals seeking a **high-speed, high-voltage DC fuse** that balances performance, safety, and compliance, the Littelfuse PSX1XLDB0450 is a proven solution. Whether protecting a utility-scale BESS, a commercial solar array, or an industrial drive system, this fuse delivers the reliability and speed required to keep operations running smoothly.
  • 1500V DC voltage rating for high-voltage applications
  • 450A current rating in compact Size 1XL NH XL package
  • Ultra-fast response for semiconductor and battery protection
  • DIN-style mounting with optional visual/micro-switch blown-fuse indication
  • UL 248-13, EN high-speed semiconductor, and IEC 60269-7 compliant

Specifications

Amperage Rating
450 A
Brand Name
Littelfuse
Case Size
NH 1XL
Interrupting Rating
121 kA @ 1500 Vdc
Response Time
Very Fast-Acting (FF)
Sub Brand
POWR-SPEED® Fuse
Type
Square Body Fuse
Voltage Rating
1500 V
Watts loss at 100% rated current
69.3 W
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 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
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.