Littelfuse 3PH21P18MM - Safe distribution of power to multiple fuse holders in a compact design is a key objective for panel designers. The Littelfuse UL508 bus bar system eliminates most wire terminations in a time saving package. A power distribution block and associated conductors are no longer needed to feed multiple POWR-SAFE™ fuse holders. Features/Benefits: Decreases wiring terminations; Small footprint reduces space requirements; Reduces assembly time; Prevents accidental finger exposure; Quick and safe method of changing fuse holder configurations; Allows for future expansion; Improves troubleshooting; Eliminates power distribution block; RoHS compliant and lead (Pb) free. Customization: This product is simple to integrate into one- and three-phase applications. It offers multiple pole configurations and amperage ratings to match the designer’s requirements. Instructions are included for bus bar cutting by the customer for further customization. Individual power feed lugs are available which allow termination at any point along the bus bar.
Littelfuse

3PH21P18MM

UPC: 079458820959

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Overview

The Littelfuse 3PH21P18MM (SKU: 3PH21P18MM) POWR-SAFE Bus Bar System is engineered for efficient and safe power distribution in industrial control panels. This UL508 Listed system significantly reduces wiring terminations and assembly time by eliminating the need for separate power distribution blocks and conductors when feeding multiple POWR-SAFE™ fuse holders. Its compact design minimizes space requirements, crucial for space-constrained panels. The touch-safe construction prevents accidental finger exposure during fuse replacement, enhancing personnel safety. The system facilitates quick and safe configuration changes and supports future expansion, improving operational flexibility and maintenance. Key benefits include reduced wiring terminations, a small footprint, faster assembly, enhanced safety, flexible configurations, improved troubleshooting, and elimination of power distribution blocks. It is RoHS compliant and lead (Pb) free. This bus bar system is suitable for one- and three-phase applications and offers customizable pole configurations and amperage ratings. Customers can further customize by cutting the bus bar according to provided instructions. Individual power feed lugs are available for termination at any point along the bus bar. Key Specifications: - Voltage Ratings: 600 V AC/DC, 1000 V DC (1-phase, 18 mm² center-fed up to 160 A) - Current Ratings: Up to 160 A (end-fed) or 200 A (center-fed) for the 18 mm² cross-section. - Conductor Material: Copper - Pitch: 17.8 mm - Mounting Type: 35mm DIN-rail mountable - SCCR: 10 kA, 100 kA† (when protected by Class J 175 A max) - Approvals: UL 508 Listed (File E328654) Compatible Fuse Holders: - Littelfuse LFPSM, LFPSC, LPSM, LPSC series (600 V) - Littelfuse LPHV series (1000 V) Trust Littelfuse for reliable power distribution solutions in your industrial control panels.
  • Reduces wiring terminations and assembly time
  • Compact design minimizes space requirements
  • Touch-safe design prevents accidental finger exposure
  • 35mm DIN-rail mountable for easy installation
  • Suitable for one- and three-phase applications

Specifications

Brand Name
Littelfuse
Connection Type
Screw Terminal / Lug
Current Rating
160 A (end-fed), 200 A (center-fed)
Material
Copper
Mounting Type
DIN-Rail
Nema Rating
UL508
Series
POWR-SAFE™ Bus Bar System
Size
18 mm²
Sub Brand
Power Distribution System
Voltage Rating
600/600 AC/DC
1PH12P18MM is a compact-sized POWR Busbar system that provides safe distribution of electrical power to multiple dead front fuse holders and measures 212 mm in length, which can be cut down to an optimal size. See datasheet for more detailed specifications.

1PH12P18MM

1PH12P18MM is a compact-sized POWR Busbar system that provides safe distribution of electrical power to multiple dead front fuse holders and measures 212 mm in length, which can be cut down to an optimal size. See datasheet for more detailed specifications.
Fuse Block 600VAC 600VDC Class H/K 100A 1-Pole Copper Box

61036

Fuse Block 600VAC 600VDC Class H/K 100A 1-Pole Copper Box
DR4/8 SF DIN2

1SNA110368R1200

DR4/8 SF DIN2

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.