Littelfuse

PC-100-LLC-GM

Name: Littelfuse PC-100-LLC-GM Liquid Level Control Relay, 95-120 VAC, 4.7-100 kΩ Sensitivity
Brand: Littelfuse
SKU: PC-100-LLC-GM
Availability: InStock

Alternate Item Number: PC-100-LLC-GM

UPC: 079458997675

Documents & Media

Brochure Specification Sheet User Manual

Contact for Pricing

Overview

The Littelfuse PC-100-LLC-GM Liquid Level Control Relay is engineered for robust and precise liquid level management in demanding industrial environments. Designed to ensure optimal operational efficiency and prevent costly overfills or dry runs, this relay offers a reliable solution for a wide array of applications. Its core functionality revolves around detecting the presence or absence of conductive liquids through specialized probes, triggering control actions such as pump activation or deactivation. This meticulous control is paramount in sectors like water treatment, chemical processing, food and beverage production, and HVAC systems where maintaining specific liquid levels is critical for process integrity and safety. Operating within a standard AC input voltage range of 95–120 VAC, the PC-100-LLC-GM is compatible with most common industrial power supplies, facilitating straightforward integration into existing infrastructure. A standout feature is its highly adjustable probe sensitivity, which can be finely tuned from 4.7 kΩ to 100 kΩ. This broad adjustment range allows users to customize the relay's response to the specific conductivity of the liquid being monitored, accommodating everything from pure water to more viscous or mineral-laden fluids. This adaptability is crucial for ensuring accurate detection across diverse liquid types and preventing false triggers caused by variations in fluid properties. Key benefits of implementing the Littelfuse PC-100-LLC-GM include enhanced process automation, reduced manual oversight, and significant mitigation of potential equipment damage or product loss due to improper liquid levels. The relay's durable construction, characteristic of Littelfuse's commitment to quality, ensures longevity even when subjected to harsh conditions, including exposure to moisture, chemicals, and temperature fluctuations. Professionals can rely on its consistent performance to maintain system stability and optimize resource utilization. Installation is typically straightforward, involving the connection of power, probe circuitry, and the load to be controlled. The intuitive design of the sensitivity adjustment further simplifies setup and calibration. When selecting a liquid level control relay, factors such as input voltage, probe sensitivity range, environmental resilience, and manufacturer reputation are paramount. The PC-100-LLC-GM excels in these areas, offering a versatile and dependable solution. Littelfuse, a globally recognized leader in circuit protection and switching solutions, brings its extensive expertise to this product, guaranteeing a high standard of reliability and performance. This relay is an indispensable component for any industrial operation that requires precise and automated liquid level management, contributing directly to operational continuity and cost savings.

Reliable liquid level monitoring and control for industrial applications.
95–120 VAC input voltage for broad power compatibility.
Adjustable probe sensitivity from 4.7–100 kΩ for diverse liquid types.
Enhances operational efficiency and prevents costly liquid level issues.
Durable construction suitable for harsh industrial environments.

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	-40 to 158
Operating Temperature, Maximum	158
Operating Temperature, Minimum	-40
Pickup Voltage	95-120 V
Special Features	5YR WARR
Standard	UL/CE
Sub Brand	Symcom
Voltage Rating	95–120 VAC
Package Dimensions (L x W x H)	4.13 IN x 2.38 IN x 1.75 IN
Package Dimensions (L x W x H)	104.8 mm x 60.3 mm x 44.5 mm

1-1393143-3

Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10

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Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10

RK926011-BC

RTXP 18

6896057-1

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PS-60

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SCP102D24X-C02

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ACS380-040S-07A2-4

ACS380 AC Drive, 3-380-480V In, 3HP, 6A, Type OPEN, 1.5 overload, Integrated, HxWxD 6.69x2.76x7.52 in, Module

0626030563

BK63H 1P B2A 10kA 120/240VAC UL1077

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1270040900

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1SNK705010R0000

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CR104PXN1B

Pushbuttons. 104P heavy duty Oiltight Pushbutton. Nameplate. XN1B PR.No. CR100699

XT2NU3090BFF000XXX

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NNC75X75WH2

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3194213000K04

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C2G0150MQMJ

HPS Open Style Control Transformer, 150VA 240x480V-120x240V 50/60Hz

77C-KW/HP

The 77C-KW/HP single-phase current and voltage monitor provides protection with voltage from 100–240 V ac and motor full load ampere range of 2–90 A (external CTs required above 90 A).

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-115-S-SW

201-100-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.

201-200-SP-T-9

201-200-SP

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-230-S

ISS-105

ALT-115-S

PC-100-LLC-CZ

PC-100-LLC-CZ is a liquid level control relay with an input voltage ac of 95–120 and an adjustable probe sensitivity from 4.7–100 kΩ.

PC-200-LLC-GM

PC-200-LLC-GM is a liquid level control relay with an input voltage ac of 190–240 and an adjustable probe sensitivity from 4.7–100 kΩ.

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

PC-100-LLC-GM

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

Voltage Rating

Package Dimensions (L x W x H)