Littelfuse 880175-0001 - TR Series dual pole 500A Master Disconnect Switch cuts all battery power from vehicle electrical systems with applications needing switching of two circuits, or both positive and negative. Ingress protection to IP67 and IP69K means that the switch can be mounted in exposed locations on the vehicle. Drop-in replacement for competitive Master Disconnect Switches, with higher vibration and shock capabilities. 500A continuous current rating for each of the two circuits (using 2 x 4/0 input and 2 x 4/0 output cables). Can be used to switch two vehicle voltage circuits simultaneously (24V and 12V). Disconnect a battery or multiple batteries, in either the positive or the negative line. Direct lockout/tagout capability in On or Off position, with padlock or hasp. Specifications: Max operating voltage: 48V DC; Max continuous current: 500A per circuit, with 2 x 4/0 input and 2 x 4/0 output cables; 350A per circuit, with 1 x 4/0 input and 1 x 4/0 output cables; Cranking rating (30sec): 2250A per circuit, with 2 x 4/0 input and 2 x 4/0 output cables; 1750A per circuit, with 1 x 4/0 input and 1 x 4/0 output cables; Inrush rating (1 sec): 3000A per circuit with 2 x 4/0 + 1 x 2 AWG; Terminal stud size: M12 x 25mm; Temperature range: -50° to 85°C, DC-Rated to 105°C; Humidity: 0 - 95% RH; Shock: 30 G; Vibration: 8 G; Ingress rating: IP67 & IP69K.
Littelfuse

880175-0001

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Overview

The Littelfuse TR Series Dual Pole Master Disconnect Switch, SKU 880175-0001, offers robust and reliable power isolation for vehicle electrical systems. Engineered for demanding applications, this switch features a 500A continuous current rating per circuit, capable of handling high power demands. Its dual-pole design allows for simultaneous switching of two circuits, or disconnection of both positive and negative battery lines. With an impressive IP67 and IP69K ingress protection rating, the TR Series switch is designed for exposed mounting locations, safeguarding against dust, debris, and high-pressure water ingress. This makes it ideal for heavy-duty vehicles, construction equipment, agricultural machinery, and marine applications where environmental resilience is paramount. The switch supports a maximum operating voltage of 48V DC and offers substantial cranking ratings of up to 2250A per circuit (with 2 x 4/0 cables) for 30-second durations, ensuring reliable engine starting. It can also be used to switch two vehicle voltage circuits simultaneously, such as 12V and 24V systems. For enhanced safety and compliance, the TR Series incorporates direct lockout/tagout capability, allowing for secure padlock or hasp engagement in both the ON and OFF positions, meeting OSHA requirements for energy isolation devices.
  • Dual pole design for switching two circuits or positive/negative battery lines
  • 500A continuous current rating per circuit with 2 x 4/0 cables
  • IP67 and IP69K ingress protection for exposed mounting locations
  • Direct lockout/tagout capability for safety compliance
  • High vibration (8 G) and shock (30 G) resistance

Specifications

Actuator
Red Knob
Agency Approval - Vibration
8 G
Brand Name
Littelfuse
Circuitry
DPST
Contact Material
Silver Plated Copper
Current Rating (Continuous) in Amps
500 Amp
Ingress Protection
IP67, IP69K
Sub Brand
Manual Battery Disconnect Switches
Type
Dual Pole Master Disconnect Switch
Voltage Rating Max
48 V
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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.