Littelfuse 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.
Littelfuse

PC-100-LLC-CZ

Alternate Item Number: PC-100-LLC-CZ

UPC: 079458997668


Documents & Media
BrochureSpecification SheetUser Manual

Contact for Pricing

Overview

The Littelfuse PC-100-LLC-CZ is a robust and reliable liquid level control relay engineered for precise monitoring and automated control of conductive liquid levels in demanding industrial environments. Designed to integrate seamlessly with Crouzet's PNR & PNRU series liquid level controls, this relay offers exceptional performance for pump-up and pump-down applications. Its versatile input voltage range of 95–120 VAC ensures compatibility with standard industrial power supplies, while the adjustable probe sensitivity, ranging from 4.7 kΩ to 100 kΩ, allows for fine-tuning to accommodate various liquid types, foam, or debris, thereby preventing false tripping. At its core, the PC-100-LLC-CZ utilizes resistance sensing technology to detect the presence or absence of conductive liquids via high and low probes, along with a common reference or probe. A critical feature is its built-in 2-second debounce time delay, which effectively mitigates rapid pump cycling caused by liquid turbulence or splashing within tanks and reservoirs. This intelligent design enhances system stability and prolongs the operational life of pumps and associated equipment. Key Features and Benefits: * **Adjustable Sensitivity (4.7 to 100 kΩ):** Enables precise calibration to prevent false alarms due to foam, debris, or varying liquid conductivity, ensuring accurate level detection. * **2-Second Debounce Time Delay:** Prevents pump short-cycling caused by liquid surface agitation, promoting stable operation and reducing wear. * **Dual Probe Design (plus Common):** Facilitates the establishment of a specific level differential for pump activation and deactivation, offering flexible control. * **Compatibility:** Specifically designed to work with Crouzet's PNR & PNRU series liquid level controls, simplifying integration into existing systems. * **Wide Input Voltage Range (95–120 VAC):** Ensures broad applicability across common industrial power networks. This liquid level control relay is an indispensable component for applications such as water treatment facilities, wastewater management, industrial process control, agricultural irrigation systems, and any scenario requiring automated management of liquid volumes. The PC-100-LLC-CZ's durable construction and Littelfuse's reputation for quality assurance guarantee dependable operation, minimizing downtime and optimizing operational efficiency. For optimal performance and UL compliance, it is recommended to use the Model OT08PC or P1011-6 socket, with a recommended screw terminal torque of 12 in.-lbs. Trust Littelfuse for advanced liquid level control solutions that deliver precision, reliability, and long-term value in your critical industrial processes.
  • Resistance sensing for conductive liquid level detection
  • Adjustable sensitivity from 4.7 kΩ to 100 kΩ
  • Built-in 2-second debounce time delay to prevent pump short-cycling
  • Compatible with Crouzet's PNR & PNRU series liquid level controls
  • 95–120 VAC input voltage range

Specifications

Brand Name
Littelfuse
Connection Type
Screw Terminal
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
41 to 158
Operating Temperature, Maximum
158
Operating Temperature, Minimum
41
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
Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10

1-1393143-3

Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10
Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10

1-1393143-6

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

6896057-1

RTXD Extractor Tool
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

SCP102D24X-C02

IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

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.