Littelfuse

ISS-101

Name: Littelfuse ISS-101 UL 913 Switch for Hazardous Area Interfacing
Brand: Littelfuse
SKU: ISS-101
Availability: InStock

Alternate Item Number: ISS-101

UPC: 079458994254

Documents & Media

Brochure Specification Sheet User Manual

Contact for Pricing

Overview

The Littelfuse ISS-101 is a critical component for industrial applications demanding stringent safety protocols, particularly when bridging hazardous and non-hazardous operational zones. As a UL 913 listed associated apparatus, this switch is engineered to facilitate the safe and reliable interfacing between environments with differing risk profiles. Its primary function is to act as a barrier, ensuring that electrical signals or power do not inadvertently introduce ignition sources into hazardous areas. This is achieved through its specialized design and certification, which guarantees compliance with rigorous safety standards. Installation of the ISS-101 is strictly mandated to occur within non-hazardous areas. This placement is fundamental to its safety mechanism, preventing the switch itself from becoming a potential ignition source in a volatile environment. By situating the ISS-101 in a safe zone, it can effectively monitor and control circuits that extend into or originate from hazardous locations, thereby maintaining the integrity of the overall safety system. This approach is vital in industries such as oil and gas, chemical processing, mining, and any manufacturing facility where flammable gases, vapors, or dusts may be present. The Littelfuse ISS-101 is built for dependable performance in demanding industrial settings. Its robust construction is designed to withstand the rigors of continuous operation, offering peace of mind to engineers and safety managers. The UL 913 listing signifies that the ISS-101 has undergone extensive testing and meets the highest benchmarks for safety in intrinsically safe equipment. This certification is not merely a mark of quality but a prerequisite for many critical applications where failure is not an option. Key benefits of integrating the Littelfuse ISS-101 into your system include: * **Enhanced Safety:** Directly addresses the need for isolating hazardous and non-hazardous areas, minimizing ignition risks. * **Regulatory Compliance:** UL 913 listing ensures adherence to critical safety standards for associated apparatus. * **Reliable Interfacing:** Provides a dependable connection point for control and monitoring systems across different zones. * **Durable Construction:** Engineered for longevity and consistent performance in industrial environments. * **Peace of Mind:** Trust in a product from Littelfuse, a recognized leader in circuit protection and safety solutions. When selecting components for hazardous area applications, the Littelfuse ISS-101 (SKU: ISS-101) stands out as a trusted and certified solution. Its role in industrial control and automation systems is indispensable for maintaining operational safety and regulatory compliance. Professionals rely on such associated apparatus to build robust, secure, and compliant electrical systems that protect personnel and assets. The commitment to quality and safety inherent in Littelfuse products makes the ISS-101 a prudent choice for any application requiring the careful management of hazardous environments.

UL 913 listed associated apparatus for hazardous area interfacing
Designed for installation exclusively in non-hazardous areas
Ensures safe electrical isolation between hazardous and non-hazardous zones
Robust construction for reliable industrial performance
Ideal for oil & gas, chemical processing, and other high-risk industries

Specifications

Brand Name	Littelfuse
Mounting	DIN rail or Surface mount (plug into OT08-PC socket)
Number Of Poles	DIN rail or surface mount (plug into OT08-PC socket)
Operating Temperature	-4 to 158
Operating Temperature, Maximum	158
Operating Temperature, Minimum	-4
Pickup Voltage	90-120 V
Special Features	5YR WARR
Standard	UL
Sub Brand	Symcom
Package Dimensions (L x W x H)	2.35 IN x 2.08 IN x 3.5 IN
Package Dimensions (L x W x H)	59.7 mm x 52.9 mm x 88.9 mm

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ISS-100

The ISS-100 switches are UL 913 listed as an associated apparatus for interfacing between hazardous and non-hazardous areas. These units must be installed in a non-hazardous area.

ISS-102C-M-LC

The ISS-102 is a two-channel, intrinsically-safe switch designed for multiple uses including a pump-up/pump-down (latching) controller or two-channel switch. Two LEDs indicate the state of the intrinsically-safe inputs and output relays and user-selectable options are available including a variable resistance threshold for float inputs. The ISS-102 enclosure is surface or DIN rail mountable. -LC Each input channel is active when the corresponding switch is closed. When the lag input (CH2) is activated, the output closes. Applying latching logic, the output contact remains closed until the lead (CH1) and the lag (CH2) inputs are deactivated. Sensitivity is fixed at 100kOhms with a debounce time delay of 2 seconds. -DCS This dual-channel switch has a debounce delay feature of 0.5 seconds. Resistance probes or switches can be used on its inputs. Two LEDs illuminate the output state of either form A relay. Sensitivity is fixed at 100kOhms with a debounce time delay of 0.5 seconds. -MC By selecting the proper functionality through the dip switches, you can define a pump-up or pump-down, single or dual channel non-latching switch. The sensitivity adjustment (4.7k-100kOhms) allows you to define the input impedance at which the output relays (one form A & one form C) will change state, with a debounce time delay of 0.5 or 2 seconds.

PC-102CICI-LT

PC-102CICI-LT is a seal-leak and over-temperature detector that uses one input to sense seal failures and the temperature input to detect motor overheating. This unit is configurable to suit various probes. Seal input logic (direct or inverted) and over-temperature trip reset (automatic or manual) is DIP-switch selectable. See datasheet for detailed technical characteristics.

ISS-102ACI-MC

ISS-105-ISO

The ISS-105 is a “smart” five-channel intrinsically safe relay and pump controller. The ISS-105 can be configured for a wide variety of applications including alternating or non-alternating duplex, duplex separate pump stop (SPS), triplex and quadplex applications. It can be set up for pump-up or pump-down applications or can be used as a five-channel relay. The ISS-105 has a long list of features that are needed for multiple pump applications. The ISS-105 can indicate low, high and out-of-sequence alarms. If an out-of-sequence alarm occurs, the skipped pump(s) will be started as intended. The Model ISS-105 can be set up to do non-alternating control, alternating control and alternating control with one non-alternating pump. The non-alternating pump is intended for use with an emergency or jockey pump. The ISS-105 can start an emergency pump once every 50 cycles to keep it working freely. Using the built-in DIP switches, individual pumps can be disabled when taken out of service for repair or maintenance.

ALT-115-X-SW

The ALT alternating relays are used to alternate between two loads. The ALT is commonly used in duplex pumping applications to balance the runtime of both pumps. The ALT-S is used in single high-level float applications. When the float switch opens, the alternating relay changes state, forcing the other pump to run the next time the float closes. All ALT relays have a built-in debounce feature that prevents the relay from changing state if the switch or float contact bounces momentarily. The ALT-X has an internal cross-connected relay and is used in dual high-level float applications. These floats are commonly referred to as lead and lag floats. The pumps alternate as in the ALT-S version but the crossconnected relay configuration allows both pumps to run simultaneously when both the lead and lag floats are closed. These relays are also available with a built-in switch (SW option) that is used to manually force one of the pumps to run every time the float switch is closed. This is helpful when a pump has been removed for repair or for test purposes. In the case of the ALT-X-SW, the switch essentially forces one pump to be the lead pump, while still allowing the second to run when both floats are closed. Must use the OT08PC socket for UL Rating!

ALT-230-S

201-200-SP

The 201-xxx-SP is an 8-pin octal-base, plug-in voltage monitor designed to protect single-phase motors regardless of size. The 201-100-SP is used on 95-120VAC, 50/60Hz motors to prevent damage caused by low voltage. The 201-200-SP is used on 190-240VAC, 50/60Hz motors. The 201-200-SP-T-9 is a pin-for-pin replacement for a Time Mark; #260 Series voltage monitor. High voltage protection is included in the 201-200-SP-T-9. The unique microcontroller-based voltage and voltage-sensing circuit constantly monitors the voltage to detect harmful power line conditions. When a harmful condition is detected, the relay’s output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level and a specified amount of time has elapsed (restart delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

PC-100-LLC-GM

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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.

Littelfuse

ISS-101

Documents & Media

Overview

Specifications

Brand Name

Mounting

Number Of Poles

Operating Temperature

Operating Temperature, Maximum

Operating Temperature, Minimum

Pickup Voltage

Special Features

Standard

Sub Brand

Package Dimensions (L x W x H)